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Preparation and characterization of nanocellulose-based carbon dioxide adsorbing aerogels
Luleå University of Technology, Department of Engineering Sciences and Mathematics. (Wood and Bionanocomposites)
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

CO2 adsorption is considered as a promising strategy to decrease the amount of CO2 in the atmosphere and stop global warming. The goal of this project is to prepare a cellulose-based CO2 adsorbent with a good mass transfer. Monolithic adsorbent based on cellulose nanofibrils (CNF) was fabricated via freeze-casting. 0.1g or 0.5g cellulose acetate (CA) or 0.1g acetylated CNC (aCNC) was dipped into the crosslinked aerogel to increase its CO2 capacity. Acetylation of CNC was confirmed by Fourier transformed infrared spectroscopy (FT-IR) and the degree of substitution was determined to be 1.6 through titration. Scanning electron microscopy (SEM) images showed that monolithic structure was formed through freeze-casting and the structure was maintained after dipping. Compression test suggested that the mechanical properties of the aerogel increased with the increasing amount of dipped CA, while the CO2 capacity of the adsorbent decreased. Furthermore, the outstanding reinforcing effect of aCNC was noticed in the compression test, and the aerogel dipped with aCNC has the highest CO2 capacity with a value of 1.49 mmol/g.

Place, publisher, year, edition, pages
2017.
Keyword [en]
CO2 adsorption, freeze-casting, cellulose nanofibrils, acetylation, breakthrough
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-66166OAI: oai:DiVA.org:ltu-66166DiVA: diva2:1149992
Subject / course
Student thesis, at least 30 credits
Educational program
Materials Engineering, master's level (120 credits)
Presentation
2017-09-08, E206a-b, Luleå university of technology, Luleå, 09:30 (English)
Supervisors
Examiners
Available from: 2017-10-26 Created: 2017-10-17 Last updated: 2017-10-26Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
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  • de-DE
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