Journal
POLYMER
Volume 134, Issue -, Pages 155-162Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2017.11.051
Keywords
Biobased epoxy resin; Nanocomposite; Cellulose nanocrystal; Surface modification; Dispersion
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Funding
- National Science Foundation Partnerships for International Research and Education (PIRE) Program [1243313]
- Science Policy Office of the Belgian Federal Government [PAI 7/5]
- European Commission/Walloon Region (FEDER - BIORGEL, MACOBIO RF projects - Valicell - INTERREG V BIOCOMPAL)
- Belgian National Fund for Scientific Research (FNRS)
- Office Of Internatl Science &Engineering
- Office Of The Director [1243313] Funding Source: National Science Foundation
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Herein a unique strategy for cellulose nanocrystal functionalization is presented in the form of surface functionalization of cellulose nanocrystals. Cellulose nanocrystals were prepared from acid hydrolysis of ramie fibers and then further subjected to amine functionalization with an amino trimethoxy silane (APTMS). The introduction of surface amine functionality to the cellulose nanocrystal allowed for an additional reaction with a biobased epoxy resin derived from diphenolic acid. The resulting thermo-mechanical properties of epoxy nanocomposites with amine functionalized cellulose nanocrystal were on average more than 7 times improved. Specifically, the storage modulus at 160 degrees C increased from 19.5 MPa for the neat resin to 151.5 MPa for the composite with 10 wt% APTMS modified CNC. The results reported herein demonstrate that amine functionalized cellulose nanocrystals provide excellent dispersion in epoxy resin systems and are a viable route to utilization of both biobased nanofillers and biobased epoxy resins. (C) 2017 Elsevier Ltd. All rights reserved.
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