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Chemical routes for functional redispersible cellulose nanofibrils
Applied Wood Materials Laboratory, Swiss Federal Laboratories for Materials Science and Technology (EMPA), CH-8600 Dübendorf.
Applied Wood Materials Laboratory, Swiss Federal Laboratories for Materials Science and Technology (EMPA), CH-8600 Dübendorf.
Applied Wood Materials Laboratory, Swiss Federal Laboratories for Materials Science and Technology (EMPA), CH-8600 Dübendorf.
2008 (English)In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 235, no 24Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

This lecture will present chemical routes designed for the large scale production of functional, redispersible cellulose nanofibrils (CNF) with applications in the field of adhesives, packaging and textiles. Suspensions of CNF obtained by mechanical disintegration and homogenization of pulps from bleached beech, wheat straw and oat were chemically surface-treated (e.g. silane condensation, etherification, oxidation reactions) prior to drying. This facilitates redispersion of the CNF in polymer matrices, organic or non-organic solvents showing the same network formation as native CNF suspensions. Also, treated CNF are carriers of functional groups (COOH, NH2) which are amenable to further chemical modification (e.g. by cross linking with biopolymers like PLA). The chemically modified CNF were characterized by spectroscopic (NMR, FT-IR, XPS) and morphological (SEM-EDX) methods. Also, the mechanical performance of resulting nanocomposites (CNF embedded in a model polymer matrix) was evaluated by mechanical (universal tensile tests) and dynamic mechanical analysis (DMA).

Place, publisher, year, edition, pages
2008. Vol. 235, no 24
Identifiers
URN: urn:nbn:se:ltu:diva-28601Local ID: 272efadb-6ade-4545-a56d-de742d379c05OAI: oai:DiVA.org:ltu-28601DiVA, id: diva2:1001802
Conference
American Chemical Society National Meeting & Exposition : 06/04/2008 - 10/04/2008
Note
Upprättat; 2012; 20121206 (andbra)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-30Bibliographically approved

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CiteExportLink to record
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