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  • 1. Alkarmo, Walid
    et al.
    Ouhib, Farid
    Aqil, Abdelhafid
    Thomassin, Jean-Michel
    Yuan, Jiayin
    Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
    Gong, Jiang
    Vertruyen, Bénédicte
    Detrembleur, Christophe
    Jérôme, Christine
    Poly(ionic liquid)-Derived N-Doped Carbons with Hierarchical Porosity for Lithium- and Sodium-Ion Batteries2019In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 40, no 1, article id 1800545Article in journal (Refereed)
    Abstract [en]

    The performance of lithium- and sodium-ion batteries relies notably on the accessibility to carbon electrodes of controllable porous structure and chemical composition. This work reports a facile synthesis of well-defined N-doped porous carbons (NPCs) using a poly(ionic liquid) (PIL) as precursor, and graphene oxide (GO)-stabilized poly(methyl methacrylate) (PMMA) nanoparticles as sacrificial template. The GO-stabilized PMMA nanoparticles are first prepared and then decorated by a thin PIL coating before carbonization. The resulting NPCs reach a satisfactory specific surface area of up to 561 m(2) g(-1) and a hierarchically meso- and macroporous structure while keeping a nitrogen content of 2.6wt%. Such NPCs deliver a high reversible charge/discharge capacity of 1013 mA h g(-1) over 200 cycles at 0.4A g(-1) for lithium-ion batteries, and show a good capacity of 204 mAh g(-1) over 100 cycles at 0.1A g(-1) for sodium-ion batteries.

  • 2.
    Arias, Veluska
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Odelius, Karin
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Albertsson, Ann-Christine
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nano-Stereocomplexation of Polylactide (PLA) Spheres by Spray Droplet Atomization2014In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 35, no 22, p. 1949-1953Article in journal (Refereed)
    Abstract [en]

    A direct, efficient, and scalable method to prepare stereocomplexed polylactide (PLA)-based nanoparticles (NPs) is achieved. By an appropriate combination of fabrication parameters, NPs with controlled shape and crystalline morphology are obtained and even pure PLA stereocomplexes (PLASC) are successfully prepared using the spray-drying technology. The formed particles of varying D- and L-LA content have an average size of approximate to 400 nm, where the smallest size is obtained for PLA50, which has an equimolar composition of PLLA and PDLA in solution. Raman spectra of the particles show the typical shifts for PLASC in PLA50, and thermal analysis indicates the presence of pure stereocomplexation, with only one melting peak at 226 degrees C. Topographic images of the particles exhibit a single phase with different surface roughness in correlation with the thermal analysis. A high yield of spherically shaped particles is obtained. The results clearly provide a proficient method for achieving PLASC NPs that are expected to function as renewable materials in PLA-based nanocomposites and potentially as more stable drug delivery carriers.

  • 3.
    Arja, Katriann
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Organic Chemistry. Linköping University, The Institute of Technology. Linköping, .
    Sjölander, Daniel
    Linköping University, Department of Physics, Chemistry and Biology, Protein Science. Linköping University, Faculty of Science & Engineering. Linköping, .
    Åslund, Alma
    Linköping University, Department of Physics, Chemistry and Biology, Organic Chemistry. Linköping University, Faculty of Science & Engineering. Linköping, .
    Prokop, Stefan
    Charite, Germany .
    Heppner, Frank L.
    Charite, Germany .
    Konradsson, Peter
    Linköping University, Department of Physics, Chemistry and Biology, Organic Chemistry. Linköping University, Faculty of Science & Engineering. Linköping, .
    Lindgren, Mikael
    Norwegian University of Science and Technology, Norway .
    Hammarström, Per
    Linköping University, Department of Physics, Chemistry and Biology, Protein Science. Linköping University, Faculty of Science & Engineering. Linköping, .
    Åslund, Andreas
    Linköping University, Department of Physics, Chemistry and Biology, Organic Chemistry. Linköping University, Faculty of Science & Engineering. Linköping, .
    Nilsson, Peter
    Linköping University, Department of Physics, Chemistry and Biology, Organic Chemistry. Linköping University, Faculty of Science & Engineering. Linköping, .
    Enhanced Fluorescent Assignment of Protein Aggregates by an Oligothiophene-Porphyrin-Based Amyloid Ligand2013In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 34, no 9, p. 723-730Article in journal (Refereed)
    Abstract [en]

    Fluorescent probes identifying protein aggregates are of great interest, as deposition of aggregated proteins is associated with many devastating diseases. Here, we report that a fluorescent amyloid ligand composed of two distinct molecular moieties, an amyloidophilic pentameric oligothiophene and a porphyrin, can be utilized for spectral and lifetime imaging assessment of recombinant A 1-42 amyloid fibrils and A deposits in brain tissue sections from a transgenic mouse model with Alzheimers disease pathology. The enhanced spectral range and distinct lifetime diversity of this novel oligothiopheneporphyrin-based ligand allow a more precise assessment of heterogeneous amyloid morphology compared with the corresponding oligothiophene dye.

  • 4.
    Dai, Tingyang
    et al.
    Nanjing University, Peoples R China.
    Chen, Kai
    Nanjing University of Science and Technology, Peoples R China.
    Qing, Xutang
    Nanjing University, Peoples R China.
    Lu, Yun
    Nanjing University, Peoples R China.
    Zhu, Jinsong
    Nanjing University, Peoples R China.
    Gao, Feng
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.
    Sequential Polymer Precipitation of Core-Shell Microstructured Composites with Giant Permittivity2010In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 31, no 5, p. 484-489Article in journal (Refereed)
    Abstract [en]

    Polymeric core shell microstructures have been constructed through a new method, namely sequential precipitation, which is intrinsically a self-assembly and phase separation process. High-quality poly(vinyldene fluoride)-polycarbonate-lithium perchlorate composite films with spherical core shell microstructures have been prepared and determined to consist of conducting cores and insulating shells. Because of the percolation effect, the resulting materials present a dielectric constant as high as 10(4)-10(7) at the threshold.

  • 5.
    Diba, Mani
    et al.
    Radboud Univ Nijmegen Med Ctr, Dept Biomat, NL-6525 EX Nijmegen, Netherlands..
    An, Jie
    Radboud Univ Nijmegen Med Ctr, Dept Biomat, NL-6525 EX Nijmegen, Netherlands..
    Schmidt, Stephan
    Heinrich Heine Univ Dusseldorf, Inst Organ & Macromol Chem, D-40225 Dusseldorf, Germany..
    Hembury, Mathew
    Univ Utrecht, Fac Sci, UIPS, Dept Pharmaceut, NL-3508 TB Utrecht, Netherlands..
    Ossipov, Dmitri
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Polymer Chemistry.
    Boccaccini, Aldo R.
    Univ Erlangen Nurnberg, Dept Mat Sci & Engn, Inst Biomat, D-91058 Erlangen, Germany..
    Leeuwenburgh, Sander C. G.
    Radboud Univ Nijmegen Med Ctr, Dept Biomat, NL-6525 EX Nijmegen, Netherlands..
    Exploiting Bisphosphonate-Bioactive-Glass Interactions for the Development of Self-Healing and Bioactive Composite Hydrogels2016In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 37, no 23, p. 1952-1959Article in journal (Refereed)
    Abstract [en]

    Hydrogels are widely recognized as promising candidates for various biomedical applications, such as tissue engineering. Recently, extensive research efforts have been devoted to the improvement of the biological and mechanical performance of hydrogel systems by incorporation of functional groups and/or inorganic particles in their composition. Bisphosphonates are a class of drugs, commonly used for treatment of osteoporosis, which exhibit a strong binding affinity for hydroxyapatite. In this study, the binding affinity of a bisphosphonate-functionalized polymer, hyaluronan, toward a bioactive glass (i.e., 45S5 Bioglass) is evaluated using force-distance measurements with atomic force microscopy. The strong interaction between bisphosphonate and bioactive glass is then exploited to develop organic-inorganic composite hydrogels and the viscoelastic and self-healing ability of these materials are investigated. Finally, the stability and mineralization behavior of these hydrogels are evaluated in simulated body fluid. Following this approach, injectable, bioactive and self-healing organic-inorganic composite hydrogels are produced, which mineralize abundantly and rapidly in simulated body fluid. These properties render these composite gels suitable for applications in bone-tissue engineering.

  • 6.
    Engelmark Cassimjee, Karim
    et al.
    KTH, School of Biotechnology (BIO), Biochemistry.
    Marí­n, Sílvia Rodríguez
    KTH, School of Biotechnology (BIO), Biochemistry.
    Berglund, Per
    KTH, School of Biotechnology (BIO), Biochemistry.
    Synthesis of cyclic polyamines by enzymatic generation of an amino aldehyde in situ2012In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 33, no 18, p. 1580-1583Article in journal (Refereed)
    Abstract [en]

    Multifunctional polycationic polyamines, for example, used in drug and gene delivery, have product range limitations in their synthesis methods. Here, we synthesize a polyamine by forming a self-assembling amino aldehyde from the corresponding amino alcohol with horse liver alcohol dehydrogenase (HLADH), followed by reduction. Circular polyamines were synthesized from 3-amino-propan-1-ol as starting material, analogous to cyclic polyamines formed from azetidin. The product had an isolated yield of 89.7% or 15.3 g L -1. The predicted range of possible polyamine products by this method is broad since many amino alcohols are putative substrates for HLADH. The enzyme also had activity for 2-amino-propan-1-ol and 2-amino-2-phenyl-ethanol, for which the enantioselectivity was 330 (S) and 32 (R), respectively.

  • 7. Gan, Zhixing
    et al.
    Xu, Hao
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cellular Biophysics. KTH, Centres, Science for Life Laboratory, SciLifeLab. Ningbo University, China.
    Photoluminescence of Diphenylalanine Peptide Nano/Microstructures: From Mechanisms to Applications2017In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 38, no 22, article id 1700370Article, review/survey (Refereed)
    Abstract [en]

    Diphenylalanine (Phe-Phe, FF) molecules, which can self-assemble into highly ordered nano/microstructures, have increasingly aroused intense interests due to their special optical properties. In this review, recent advances in photoluminescence (PL) of supramolecular architectures of FF-based peptide and the underlying mechanisms are highlighted. Mainly deep ultraviolet emission at around 285 nm and/or blue emission at approximate to 450 nm are observed in various FF peptide structures and its derivatives, which are primarily interpreted by quantum confinement effects, shallow radiative traps, and electron delocalization via hydrogen bonds in beta-sheet structures. Furthermore, current applications of such fluorescent peptide nano/microstructures are also reviewed here, e.g., probing the number of water molecules confined in FF, temperature sensing, and visualization of deep ultraviolet beam. Yet, the PL mechanism is still under fierce debate and the application based on fluorescence is constantly under exploration. Thus, this review is endeavored to boost future explorations on the PL of the bioinspired FF peptide nano/microstructures.

  • 8.
    Herland, Anna
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics .
    Inganäs, Olle
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics .
    Conjugated polymers as optical probes for protein interactions and protein conformations2007In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 28, no 17, p. 1703-1713Article in journal (Refereed)
    Abstract [en]

    There is a need for highly sensitive, multi-parallel protein sensors within diagnostics and proteomic research. Conjugated polymers (CPs) have been demonstrated as highly sensitive optical probes for protein biosensing. Compared to small molecules, the polymeric probe has the possibility of multiple interactions and a collective response, which enhances the sensor signal. The optical output is colorimetric or, more sensitive, fluorescence based, including Förster energy transfer and changes in the emission wavelengths and/or intensity. Using CPs, many interesting protein detection events have been demonstrated, e.g., protein interactions, enzymatic activity, amyloid fibril formation, and detection by aptamers. CPs have also been successfully used to stain bacterial, cellular, and tissue samples. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.

  • 9. Jo, Y. S.
    et al.
    Kim, D. K.
    Jeong, Y. K.
    Kim, K. J.
    Muhammed, Mamoun
    KTH, Superseded Departments, Materials Science and Engineering.
    Encapsulation of bovine serum albumin in temperature-programmed shell-in-shell structures2003In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 24, no 16, p. 957-962Article in journal (Refereed)
    Abstract [en]

    A novel approach to load a hydrophilic bovine serum albumin into drug carriers was proposed in terms of temperature-programmed shell-in-shell structures, which were fabricated with poly(N-isopropylacrlamide), poly(lactide), poly(ethylene glycol), and Au nanoparticles. Spherically well-defined shell-in-shell structures were constructed by a modified-double-emulsion method (MDEM). The lower critical solubility temperature of the structures was manipulated to 36.4degreesC which was confirmed by UV/Vis spectroscopy and DSC (Differential Scanning Calorimetry).

  • 10. Leppänen, Ann-Sofie
    et al.
    Xu, Chunlin
    KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    Liu, Jun
    Wang, Xiaoju
    Pesonen, Markus
    Willfoer, Stefan
    Anionic Polysaccharides as Templates for the Synthesis of Conducting Polyaniline and as Structural Matrix for Conducting Biocomposites2013In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 34, no 13, p. 1056-1061Article in journal (Refereed)
    Abstract [en]

    A green chemoenzymatic pathway for the synthesis of conducting polyaniline (PANI) composites is presented. Laccase-catalyzed polymerization in combination with anionic polysaccharides is used to produce polysaccharide/PANI composites, which can be processed into flexible films or coated onto cellulose surfaces. Different polysaccharide templates are assessed, including -carrageenan, native spruce O-acetyl galactoglucomannan (GGM), and TEMPO-oxidized cellulose and GGM. The resulted conducting biocomposites derived from natural materials provide a broad range of potential applications, such as in biosensors, electronic devices, and tissue engineering.

  • 11.
    Li, Zhenguang
    et al.
    Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, 2-24-16 Naka Cho, Koganei, Tokyo 1848588, Japan.
    Mogensen, Ronnie
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
    Mindemark, Jonas
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
    Bowden, Tim
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Polymer Chemistry.
    Brandell, Daniel
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry. Uppsala Univ, Dept Chem, Angstrom Lab, SE-75121 Uppsala, Sweden.
    Tominaga, Yoichi
    Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, 2-24-16 Naka Cho, Koganei, Tokyo 1848588, Japan.
    Ion-Conductive and Thermal Properties of a Synergistic Poly(ethylene carbonate)/Poly(trimethylene carbonate) Blend Electrolyte2018In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 39, no 14, article id 1800146Article in journal (Refereed)
    Abstract [en]

    Electrolytes comprising poly(ethylene carbonate) (PEC)/poly(trimethylene carbonate) (PTM C) with lithium bis(trifluoromethane sulfonyl)imide (LiTFSI) are prepared by a simple solvent casting method. Although PEC and PTMC have similar chemical structures, they are immiscible and two glass transitions are present in the differential scanning calorimetry (DSC) measurements. Interestingly, these two polymers change to miscible blends with the addition of LiTFSI, and the ionic conductivity increases with increasing lithium salt concentration. The optimum composition of the blend electrolyte is achieved at PEC6PTMC4, with a conductivity as high as 10(-6) S cm(-1) at 50 degrees C. This value is greater than that for single PEC- and PTMC-based electrolytes. Moreover, the thermal stability of the blend-based electrolytes is improved as compared to PEC-based electrolytes. It is clear that the interaction between C=O groups and Li+ gives rise to a compatible amorphous phase of PEC and PTMC.

  • 12. Lin, Huijuan
    et al.
    Zhang, Suyun
    Xiao, Yan
    Zhang, Chenjun
    Zhu, Jixin
    Dunlop, John W. C.
    Yuan, Jiayin
    Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
    Organic Molecule-Driven Polymeric Actuators2019In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 40, no 7, article id 1800896Article, review/survey (Refereed)
    Abstract [en]

    Inspired by the motions of plant tissues in response to external stimuli, significant attention has been devoted to the development of actuating polymeric materials. In particular, polymeric actuators driven by organic molecules have been designed due to their combined superiorities of tunable functional monomers, designable chemical structures, and variable structural anisotropy. Here, the recent progress is summarized in terms of material synthesis, structure design, polymer-solvent interaction, and actuating performance. In addition, various possibilities for practical applications, including the ability to sense chemical vapors and solvent isomers, and future directions to satisfy the requirement of sensing and smart systems are also highlighted.

  • 13. Lindblad, M. S.
    et al.
    Ranucci, E.
    Albertsson, Ann-Christine
    KTH, Superseded Departments, Polymer Technology.
    Biodegradable polymers from renewable sources. New hemicellulose-based hydrogels2001In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 22, no 12, p. 962-967Article in journal (Refereed)
    Abstract [en]

    Communication: Hemicellulose/poly(2-hydroxyethyl methacrylate) (PHEMA)-based hydrogels were prepared by the radical polymerization of HEMA with hemicellulose purposely modified with well-defined amounts of methacrylic functions using a redox initiator system. Oligomeric hydrosolube hemicelluloses produced from spruce chips were used for modification studies. The chemical modification of hemicellulose was performed with 2-[(1-imidazolyl)formyloxy]ethyl methacrylate as a modifying agent and triethylamine as the catalyst. The kinetics of the modification reaction was monitored by means of H-1 NMR spectroscopy. The resulting hydrogels obtained after a 30 min reaction were homogeneous, elastic, and transparent materials.

  • 14. Lundberg, Pontus
    et al.
    Hawker, Craig J.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Click assisted one-pot multi-step reactions in polymer science: Accelerated synthetic Protocols2008In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 29, no 12-13, p. 998-1015Article, review/survey (Refereed)
    Abstract [en]

    Presently, the majority of reports deal with combining chemical reactions, in a stepwise fashion, to obtain well-defined polymers. In the future, chemists need to address new challenges such as increase in the range of available efficient reactions, developing libraries of compatible one-pot reactions, and the application of obtained materials in key industries. Indeed, the rising importance of the click concept has now devised robust synthetic approaches in various fields of research. The unique selectivity of the click reaction is today a new found toolbox for scientists to investigate one-pot multi-step systems. Several accelerated protocols have elegantly been reported to obtain a library of advanced polymers.

  • 15.
    Mindemark, Jonas
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Polymer Chemistry.
    Bowden, Tim
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Polymer Chemistry.
    Efficient DNA Binding and Condensation Using Low Molecular Weight, Low Charge Density Cationic Polymer Amphiphiles2010In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 31, no 15, p. 1378-1382Article in journal (Refereed)
    Abstract [en]

    A new class of biodegradable cationic macromolecules for DNA binding and condensation was developed by end-group-functionalization of poly(trimethylene carbonate). A series of one- and two-armed structures was synthesized and their interaction with DNA was evaluated. To aid data interpretation, a non-linear modeling method was applied to show efficient DNA binding that was intimately related to cationic charge density and macromolecular architecture. One-armed, low charge density structures were consistently found to bind to DNA at lower charge ratios than their two-armed, high charge density counterparts. This suggests that polymer backbone structure and characteristics are important considerations in the development of efficient cationic polymer systems for DNA condensation and delivery.

  • 16.
    Munoz, William Armando
    et al.
    Linköping University, Department of Science and Technology. Linköping University, Faculty of Science & Engineering.
    Crispin, Xavier
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
    Fahlman, Mats
    Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering.
    Zozoulenko, Igor
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
    Understanding the Impact of Film Disorder and Local Surface Potential in Ultraviolet Photoelectron Spectroscopy of PEDOT2018In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 39, no 4, article id 1700533Article in journal (Refereed)
    Abstract [en]

    The spectra of conducting polymers obtained using ultraviolet photoelectron spectroscopy (UPS) exhibit a typical broadening of the tail sigma(UPS) approximate to 1 eV, which by an order of magnitude exceeds a commonly accepted value of the broadening of the tail of the density of states sigma(DOS) approximate to 0.1 eV obtained using transport measurements. In this work, an origin of this anomalous broadening of the tail of the UPS spectra in a doped conducting polymer, PEDOT (poly(3,4-ethylenedioxythiophene)), is discussed. Based on the semiempirical approach and using a realistic morphological model, the density of valence states in PEDOT doped with molecular counterions is computed. It is shown that due to a disordered character of the material with randomly distributed counterions, the localized charge carriers in PEDOT crystallites experience spatially varying electrostatic potential. This leads to spatially varying local vacuum levels and binding energies. Taking this variation into account the UPS spectrum is obtained with the broadening of the tail comparable to the experimentally observed one. The results imply that the observed broadening of the tail of the UPS spectra in PEDOT provides information about a disordered spatially varying potential in the material rather than the broadening of the DOS itself.

  • 17.
    Nyström, Daniel
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva E.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Johansson, Mats K. G.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Whittaker, Michael
    Chemistry Department, University of Queensland.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Highly-ordered hybrid organic-inorganic isoporous membranes from polymer modified nanoparticles2005In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 26, no 7, p. 524-528Article in journal (Refereed)
    Abstract [en]

    Organic-inorganic hybrid materials consisting of nanosized silica particles with surface grafted PS or PS-b-PMMA were synthesized using ATRP. These hybrid materials were used in the fabrication of highly-ordered isoporous membranes. Optical characterization revealed that the membranes consisted of hexagonally ordered pores of uniform size. The combination of an open pore structure and high surface area makes isoporous membranes into materials of high interest in fields as biotechnology and photonics.

  • 18. Ranucci, E.
    et al.
    Liu, Y.
    Lindblad, M. S.
    Albertsson, Ann-Christine
    KTH, Superseded Departments, Polymer Technology.
    New biodegradable polymers from renewable sources. High molecular weight poly(ester carbonate)s from succinic acid and 1,3-propanediol2000In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 21, no 10, p. 680-684Article in journal (Refereed)
    Abstract [en]

    High molecular weight poly(ester carbonate)s have been prepared by a two-step chain-extension reaction performed on oligomeric alpha,omega-dihydroxy-terminated poly(1,3-propylene succinate) in turn obtained by thermal polycondensation of excess 1,3-propanediol with succinic acid. The new polymers have a biodegradable backbone and derive from renewable sources. Therefore, they have a potential as environment-friendly materials.

  • 19.
    Shi, Liyang
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Polymer Chemistry. Hunan Univ, Coll Biol, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
    Ding, Pinghui
    Hunan Univ, Coll Biol, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
    Wang, Yuzhi
    Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
    Zhang, Yu
    Northwest Univ, Coll Chem & Mat Sci, Xian 710069, Shaanxi, Peoples R China.
    Ossipov, Dmitri
    Karolinska Inst, Dept Biosci & Nutr, Hasovagen 7c, S-14157 Huddinge, Sweden.
    Hilborn, Jöns
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Polymer Chemistry.
    Self-Healing Polymeric Hydrogel Formed by Metal-Ligand Coordination Assembly: Design, Fabrication, and Biomedical Applications2019In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 40, no 7, article id 1800837Article in journal (Refereed)
    Abstract [en]

    Self-healing hydrogels based on metal-ligand coordination chemistry provide new and exciting properties that improve injectability, rheological behaviors, and even biological functionalities. The inherent reversibility of coordination bonds improves on the covalent cross-linking employed previously, allowing for the preparation of completely self-healing hydrogels. In this article, recent advances in the development of this class of hydrogels are summarized and their applications in biology and medicine are discussed. Various chelating ligands such as bisphosphonate, catechol, histidine, thiolate, carboxylate, pyridines (including bipyridine and terpyridine), and iminodiacetate conjugated onto polymeric backbones, as well as the chelated metal ions and metal ions containing inorganic particles, which are used to form dynamic networks, are highlighted. This article provides general ideas and methods for the design of self-healing hydrogel biomaterials based on coordination chemistry.

  • 20.
    Takwa, Mohamad
    et al.
    KTH, School of Biotechnology (BIO), Biochemistry.
    Simpson, Neil
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hult, Karl
    KTH, School of Biotechnology (BIO), Biochemistry.
    Martinelle, Mats
    KTH, School of Biotechnology (BIO), Biochemistry.
    One-Pot Difunctionalization of Poly-(ω-pentadecalactone) with Thiol-Thiol or Thiol-Acrylate Groups, Catalyzed by Candida antarctica Lipase B2006In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 27, no 22, p. 1932-1936Article in journal (Refereed)
    Abstract [en]

    An enzymatic one-pot procedure has been developed for the synthesis of difunetional polyesters containing terminal thiols and acrylates. Candida antarctica lipase B was used as a catalyst for the ring-opening polymerization of ω-pentadecalactone. The polymerization was initiated with 6-mercaptohexanol, then terminated with γ-thiobutyrolactone or vinyl acrylate to create two types of difunetional polyesters with a very high content of thiol-thiol or thiolacrylate end-groups.

  • 21.
    Varghese, Oommen P.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Polymer Chemistry.
    Kisiel, Marta
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Polymer Chemistry.
    Martinez-Sanz, Elena
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Polymer Chemistry.
    Ossipov, Dmitri A.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Polymer Chemistry.
    Hilborn, Jöns
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Polymer Chemistry.
    Synthesis of Guanidinium-Modified Hyaluronic Acid Hydrogel2010In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 31, no 13, p. 1175-1180Article in journal (Refereed)
    Abstract [en]

    In this report, a new guanidinylating reagent is presented, which was developed without any protection/deprotection strategy and was successfully employed for linking to hyaluronan in aqueous solution. The dually functionalised HA biopolymer bearing guanidinium and hydrazide groups was synthesised to form hydrogel in Ho less than a minute when mixed with aldehyde-modified HA. This hydrogel exhibited higher storage modulus with enhanced stability in PBS when compared to the non-guanidine-containing gel. The gel shift assay showed that this biopolymer formed a stable complex with DNA as well as efficient gene transfection to cells that express HA-receptor CD44. The toxicity studies of this polymer with fibroblast cells revealed that the cells were almost 80% viable after 4 d of incubation at high HA concentration (2.5 x 10(-3) m).

  • 22. Wu, Q. J.
    et al.
    Liu, X. H.
    Berglund, Lars A.
    An unusual crystallization behavior in polyamide 6/montmorillonite nanocomposites2001In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 22, no 17, p. 1438-1440Article in journal (Refereed)
    Abstract [en]

    The crystallization behavior and structure of polyamide 6 (PA6) nanocomposites containing 3 wt.-% montmorillonite (MMT) were investigated for different cooling conditions using differential scanning calorimetry and X-ray diffraction. In sharp contrast to PA6 and other semicrystalline polymers, increased cooling rates resulted in higher crystallinity of PA6/MMT. The. highest crystallinity (60.8%) occurred in the liquid nitrogen-quenched PA6/MMT film. The results show that the gamma -crystalline form is dominant in the rapidly cooled PA6/MMT.

  • 23.
    Wu, Qiuju
    et al.
    Luleå tekniska universitet.
    Liu, Xiaohui
    Luleå tekniska universitet.
    Berglund, Lars A.
    Luleå tekniska universitet.
    An unusual crystallization behavior in polyamide 6/montmorillonite nanocomposites2001In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 22, no 17, p. 1438-1440Article in journal (Refereed)
    Abstract [en]

    The crystallization behavior and structure of polyamide 6 (PA6) nanocomposites containing 3 wt.-% montmorillonite (MMT) were investigated for different cooling conditions using differential scanning calorimetry and X-ray diffraction. In sharp contrast to PA6 and other semicrystalline polymers, increased cooling rates resulted in higher crystallinity of PA6/MMT. The highest crystallinity (60.8%) occurred in the liquid nitrogen-quenched PA6/MMT film. The results show that the -crystalline form is dominant in the rapidly cooled PA6/MMT.

  • 24.
    Wåhlander, Martin
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Nilsson, Fritjof
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Polymeric Materials.
    Andersson, Richard L.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Polymeric Materials.
    Carlmark, Anna
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Hillborg, Henrik
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Polymeric Materials. ABB AB.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Reduced and Surface-Modified Graphene Oxide with Nonlinear Resistivity2017In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927Article in journal (Refereed)
    Abstract [en]

    Field-grading materials (FGMs) are used to reduce the probability for electrical breakdowns in critical regions of electrical components and are therefore of great importance. Usually, FGMs are heavily filled (40 vol.%) with semi-conducting or conducting particles. Here, polymer-grafted reduced graphene oxide (rGO) is used as a filler to accomplish percolated networks at very low filling ratios (<2 vol.%) in a semi-crystalline polymer matrix: poly(ethylene-co-butyl acrylate) (EBA). Various simulation models are used to predict the percolation threshold and the flake-to-flake distances, to complement the experimental results. A substantial increase in thermal stability of rGO is observed after surface modification, either by silanization or subsequent polymerizations. The non-linear DC resistivity of neat and silanized rGO and its trapping of charge-carriers in semi-crystalline EBA are demonstrated for the first time. It is shown that the polymer-grafted rGO improve the dispersibility in the EBA-matrix and that the graft length controls the inter-flake distances (i.e. charge-carrier hopping distances). By the appropriate selection of graft lengths, both highly resistive materials at 10 kV mm-1 and FGMs with a large and distinct drop in resistivity (six decades) are obtained, followed by saturation. The nonlinear drop in resistivity is attributed to narrow inter-flake distance distributions of grafted rGO.

  • 25. Xie, L.
    et al.
    Xu, Huan
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Li, Z. -M
    Hakkarainen, Minna
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Fibre Technology.
    Structural Hierarchy and Polymorphic Transformation in Shear-Induced Shish-Kebab of Stereocomplex Poly(Lactic Acid)2016In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 37, no 9, p. 745-751Article in journal (Refereed)
    Abstract [en]

    The realization of hierarchical shish-kebab structures for stereocomplex poly(lactic acid) (PLA) is achieved by the application of a shear flow (100 s-1 for 1 s) mimicking what can be expected during polymer processing. Compared to the normal shearing scenarios, this transient and strong shear flow enables the creation of dense shish precursors in time- and energy-saving manner. The distribution of crystal form associated with the hierarchical structure is revealed by 2D Fourier transform infrared spectroscopy imaging, creating a unique visualization for both spatial resolution and polymorphism identification. Interestingly, in the shear stereocomplex chains are preferentially extended and crystallized as stable central cores with weak temperature dependence, whereas the development of lateral kebabs is defined by the distinct relation to the crystallization temperature. Below the melting point of homocrystals, both homo and stereocomplex crystallization are engaged in lamellar packing. Above that, exclusive stereocomplex crystals are organized into ordered lamellae. Combining the direct observations at multiscale, the ordered alignment of stereocomplex chains is recognized as the molecular origin of fibrillar extended chain bundles that constitute the central row-nuclei. The proposed hypothesis affords elucidation of shish-kebab formation and unique polymorphism in sheared stereocomplex PLA, which generates opportunities for engendering hierarchically structured PLA with improved performance. A transient and strong shear mimicking the typical melt processing scenario is used to create compact shish-kebab superstructures for stereocomplex poly(lactic acid). The highly oriented fibrillar extended chains are found to constitute the central shish, while 2D Fourier transform infrared spectroscopy imaging offered a direct visualization for determination of polymorphic transition that is associated with spatial hierarchy.

  • 26. Zhao, Gui-Ling
    et al.
    Hafrén, Jonas
    Deiana, Luca
    Córdova, Armando
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
    Heterogeneous “Organoclick” Derivatization of Polysaccharides: Photochemical Thiol-Ene Click Modification of Solid Cellulose2010In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 31, no 8, p. 740-744Article in journal (Refereed)
  • 27.
    Zhao, Gui-Ling
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Hafrén, Jonas
    Deiana, Luca
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Córdova, Armando
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Heterogeneous "organoclick" derivatization of polysaccharides: Photochemical thiol-ene click modification of solid cellulose2010In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 31, no 8, p. 740-744Article in journal (Refereed)
    Abstract [en]

    A simple and direct method for derivatization of solid polysaccharides is presented. The novel methodology is based on the combination of organic acid-catalyzed esterification or etherification and photochemical thiol-ene click derivatization of a heterogeneous polysaccharide. The solid cellulose was “organoclick” modified with aryl, alkyl and polyester groups, respectively. The modification allows for a highly modular and metal free surface modification of solid polysaccharides.

1 - 27 of 27
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