Well-dispersed polyurethane/cellulose nanocrystal nanocomposites synthesized by a solvent‐free procedure in bulk

0500691 - ÚMCH 2020 RIV US eng J - Journal Article
Kupka, V. - Zhou, Q. - Ansari, F. - Tang, H. - Šlouf, Miroslav - Vojtová, L. - Berglund, L. A. - Jančář, J.
Well-dispersed polyurethane/cellulose nanocrystal nanocomposites synthesized by a solvent‐free procedure in bulk.
Polymer Composites. Roč. 40, S1 (2019), E456-E465. ISSN 0272-8397. E-ISSN 1548-0569
Institutional support: RVO:61389013
Keywords : polyurethane nanocomposites * cellulose nanocrystals
OECD category: Polymer science
Impact factor: 2.265, year: 2019
Method of publishing: Limited access
https://onlinelibrary.wiley.com/doi/full/10.1002/pc.24748

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.
Permanent Link: http://hdl.handle.net/11104/0293211