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Admicellar Polymerization Coating of CNF Enhances Integration in Degradable Nanocomposites
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology. RISE Bioecon, Drottning Kristinas Vag 61, SE-11428 Stockholm, Sweden..ORCID iD: 0000-0002-1631-1781
2019 (English)In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 20, no 2, p. 684-692Article in journal (Refereed) Published
Abstract [en]

A water-based one-pot synthesis strategy for converting cellulose nanofibrils (CNF) into a hydrophobic and processable biopolymer grade is devised. CNF was chemically modified through admicellar polymerization, producing fibrils coated with fatty acrylate polymers. The proposed modification targets a change in the interfibrillar interactions and improved CNF compatibility with a degradable plastic composite matrix, poly(butylene adipate-co-terephthalate), PBAT in composites prepared by melt extrusion. CNF had a clear reinforcing effect on PBAT, increasing Young's modulus by at least 35% and 169% at 5 and 20% (w/w) CNF content, respectively. However, unmodified CNF showed aggregation, poor adhesion in the matrix, and severely impaired the ductility of PBAT. CNF modified by admicellar polymerization was homogeneously dispersed in the PBT matrix and showed significantly better preservation of the elongation properties compared to unmodified CNF, especially at 5% (w/w) addition level.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019. Vol. 20, no 2, p. 684-692
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-245947DOI: 10.1021/acs.biomac.8b01318ISI: 000458937200012PubMedID: 30301347Scopus ID: 2-s2.0-85055521080OAI: oai:DiVA.org:kth-245947DiVA, id: diva2:1295203
Conference
Symposium on Rational Design of Multifunctional Renewable-Resourced Materials held during the ACS National Meeting, AUG 19-23, 2018, Boston, MA
Note

QC 20190311

Available from: 2019-03-11 Created: 2019-03-11 Last updated: 2019-03-11Bibliographically approved

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Edlund, Ulrica

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