Enhanced dispersion and properties of a two-component epoxy nanocomposite using surface modified cellulose nanocrystals

被引：55

作者：

Peng, Shane X. ^{[1
]}

Shrestha, Shikha ^{[1
]}

Yoo, Youngman ^{[1
]}

Youngblood, Jeffrey P. ^{[1
]}

机构：

[1] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA

来源：

POLYMER | 2017年 / 112卷

基金：

美国国家科学基金会;

关键词：

Nanocomposite; Cellulose nanocrystals; Epoxy; Surface modification; Mechanical properties; THERMOSET NANOCOMPOSITES; MECHANICAL-PROPERTIES; THERMAL-CONDUCTIVITY; COMPOSITES; PERFORMANCE; NANOFIBERS; FIBERS;

D O I：

10.1016/j.polymer.2017.02.016

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Epoxy nanocomposites reinforced with acetyl, hexanoyl, and dodecanoyl surface modified Cellulose Nanocrystals (CNC) were fabricated. Surface modified CNCs were dispersed in epoxy resin with a co-solvent. After complete removal of the co-solvent, a typical two component epoxy system was achieved where hardener was then added to cure the resin. Acetyl grafted CNC (CNC_a) and hexanoyl grafted CNC (CNC_h) both had good dispersion in cured epoxy as observed visually and through electron microscopy. Tensile modulus, tensile strength, and work of fracture of epoxy were improved with the addition of CNC_a and CNC_h. CNC_a reinforced epoxy had the highest increases in mechanical properties. Dodecanoyl grafted CNC (CNC_d) led to aggregation in the epoxy which led to insignificant changes in mechanical properties. The addition of CNC_a increased glass transition temperature (T-g) of epoxy while CNC_h and CNC_d led to T-g depression. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：359 / 368

页数：10

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