Single-step method for producing cellulose based nanocomposites with outstanding dispersion
2015 (English)Conference paper, Poster (Refereed)
Cellulose nanomaterials are promising as reinforcement in composites, which is attributed to high mechanical properties, generating large interfacial area and biodegradable ability, etc. However, obtaining good dispersion is a main challenge of large-scale industrial applications since nanomaterials tend to form aggregates and lose their merits. In this study we developed a single-step method that is in-situ polymerization to produce cellulose nanocrystals reinforced polyvinyl acetate with good dispersion. Compared to normal composites prepared by direct mechanical mixing, better dispersion of cellulose nanocrystals by using in-situ polymerization has been confirmed by atomic force microscopy. Mechanical testing shown that the in-situ nanocomposites with same cellulose content had higher strength and longer elongation at break compared to direct mixed composites. Moreover, crosslinks between cellulose and partially hydrolysed polyvinyl acetate could be formed by tetrahydroborate ions in aqueous dispersion, which further improved the reinforcing efficiency. The cellulose based nanocomposites produced by in-situ polymerization are potential materials to replace fossil based polymers used in packaging and coating applications.
Place, publisher, year, edition, pages
Research subject Wood and Bionanocomposites
IdentifiersURN: urn:nbn:se:ltu:diva-35289Local ID: 9c261215-c6c5-4608-b96c-cf2abe26f6a4OAI: oai:DiVA.org:ltu-35289DiVA: diva2:1008541
Marcus Wallenberg Prize Event – Young Researchers’ Challenge 2015 : 28/09/2015 - 30/09/2015
Godkänd; 2015; 20160331 (shigen)2016-09-302016-09-30Bibliographically approved