Well-dispersed polyurethane/cellulose nanocrystal nanocomposites synthesized by a solvent-free procedure in bulkShow others and affiliations
2019 (English)In: Polymer Composites, ISSN 0272-8397, E-ISSN 1548-0569, Vol. 40, p. E456-E465Article in journal (Refereed) Published
Abstract [en]
Polyurethane (PU) nanocomposites utilizing cellulose nanocrystals (CNCs) as nanofiller and amorphous PU matrix were synthesized in a novel solvent-free bulk process. A green nanofiller, CNCs, was studied as reinforcement and was further modified by grafting poly(ethylene glycol) (PEG) on the CNC surface (CNC-PEG). Transmission electron microscopy revealed an excellent dispersion of the PEGylated CNC nanoparticles in the PU matrix, whereas as-received CNCs formed agglomerates. The results indicated strong improvements in tensile properties with Young's modulus increasing up to 50% and strength up to 25% for both, PU/CNC and PU/CNC-PEG nanocomposites. The enhanced tensile modulus was attributed to stiff particle reinforcement together with an increase in glass transition temperature.
Place, publisher, year, edition, pages
WILEY , 2019. Vol. 40, p. E456-E465
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-246291DOI: 10.1002/pc.24748ISI: 000459570800043Scopus ID: 2-s2.0-85041194513OAI: oai:DiVA.org:kth-246291DiVA, id: diva2:1298937
Note
QC 20190325
2019-03-252019-03-252019-03-25Bibliographically approved