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Surface-Initiated Controlled Radical Polymerization Approach to Enhance Nanocomposite Integration of Cellulose Nanofibrils
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
2017 (English)In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 18, no 6, 1947-1955 p.Article in journal (Refereed) Published
Abstract [en]

A strategy is devised for the conversion of hydrophilic cellulose nanofibrils (CNFs) into hydrophobic CNF that form a stable nanocomposite dispersion for functional reinforcement of a polypropylene matrix. For that purpose, CNF was converted to a CNF-based microinitiator through an esterification reaction on the nanofibril surfaces, which efficiently initiated the controlled radical grafting polymerization of stearyl acrylate. The grafting-from modification was performed with and without a sacrificial initiator and verified with solid-state 13C nuclear magnetic resonance and Fourier transform infrared spectroscopy. CNF-based nanocomposites were prepared using the combination of a twin-screw mini extruder and melt pressing. Scanning electron microscopy reveals a homogeneous dispersion of the hydrophobic CNF in composite matrix with no signs of aggregation. Hydrophobic CNF showed a strong compatibility with the polypropylene matrix.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017. Vol. 18, no 6, 1947-1955 p.
Keyword [en]
Single-Electron Transfer, Methyl-Methacrylate, Vinyl-Chloride, Nanocrystals, Aerogels, Nanocelluloses, Polypropylene, Complexes, Oxidation, Nanopaper
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-210194DOI: 10.1021/acs.biomac.7b00398ISI: 000403387100027Scopus ID: 2-s2.0-85020692463OAI: oai:DiVA.org:kth-210194DiVA: diva2:1117467
Funder
Swedish Research Council Formas, 2014-151
Note

QC 20170629

Available from: 2017-06-29 Created: 2017-06-29 Last updated: 2017-06-30Bibliographically approved

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CiteExportLink to record
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  • apa
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