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Hierarchical wood cellulose fiber/epoxy biocomposites: Materials design of fiber porosity and nanostructure
RISE, Innventia.
Vise andre og tillknytning
2015 (engelsk)Inngår i: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 74, s. 60-68Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

Delignified chemical wood pulp fibers can be designed to have a controlled structure of cellulose fibril aggregates to serve as porous templates in biocomposites with unique properties. The potential of these fibers as reinforcement for an epoxy matrix (EP) was investigated in this work. Networks of porous wood fibers were impregnated with monomeric epoxy and cured. Microscopy images from ultramicrotomed cross sections and tensile fractured surfaces were used to study the distribution of matrix inside and around the fibers - at two different length scales. Mechanical characterization at different relative humidity showed much improved mechanical properties of biocomposites based on epoxy-impregnated fibers and they were rather insensitive to surrounding humidity. Furthermore, the mechanical properties of cellulose-fiber biocomposites were compared with those of cellulose-nanofibril (CNF) composites; strong similarities were found between the two materials. The reasons for this, some limitations and the role of specific surface area of the fiber are discussed.

sted, utgiver, år, opplag, sider
2015. Vol. 74, s. 60-68
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URN: urn:nbn:se:ri:diva-760DOI: 10.1016/j.compositesa.2015.03.024Scopus ID: 2-s2.0-84927161110OAI: oai:DiVA.org:ri-760DiVA, id: diva2:1039772
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Tilgjengelig fra: 2016-10-25 Laget: 2016-08-03 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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