Surface-modified cellulose nanocrystals for biobased epoxy nanocomposites

POLYMER

卷:134

Article

Yue, Liang¹  Maiorana, Anthony²  Khelifa, Farid^3,4  Patel, Ammar¹  Raquez, Jean-Marie^3,4  Bonnaud, Leila^3,4  Gross, Richard²  Dubois, Philippe^3,4  Manas-Zloczower, Ica¹ 

[1] Case Western Reserve Univ, Dept Macromol Sci & Engn, 2100 Adelbert Rd,Kent Hale Smith Bldg, Cleveland, OH 44106 USA

[2] Rensselaer Polytech Inst, New York State Ctr Polymer Synth, Dept Chem & Chem Biol, 110 8th St, Troy, NY 12180 USA

[3] Mat Nova Res Ctr, CIRMAP, Lab Polymer & Composite Mat, B-7300 Mons, Belgium

[4] Univ Mons, Pl Parc 23, B-7300 Mons, Belgium

关键词: Biobased epoxy resin;    Nanocomposite;    Cellulose nanocrystal;    Surface modification;    Dispersion;   

DOI  :  10.1016/j.polymer.2017.11.051

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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