In situ Polymerization Approach to Graphene-Reinforced Nylon-6 Composites

被引:599
作者
Xu, Zhen [1 ]
Gao, Chao [1 ]
机构
[1] Zhejiang Univ, MOE Key Lab Macromol Synth & Functionalizat, Dept Polymer Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
MULTIWALLED CARBON NANOTUBES; GRAPHITE OXIDE; MECHANICAL-PROPERTIES; MELTING BEHAVIOR; NANOCOMPOSITES; DISPERSION; REDUCTION; CHEMISTRY; FILMS; FUNCTIONALIZATION;
D O I
10.1021/ma1009337
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We reported an efficient method to prepare nylon-6 (PA6) graphene (NG) composites by in situ polymerization of caprolactam in the presence of graphene oxide (GO). During the polycondensation, GO was thermally reduced to graphene simultaneously. By adjusting the feed ratio of caprolactam to GO, various composites with 0.01-10 wt % content of graphene were obtained. The highly grafting nylon-6 arms on graphene sheets was confirmed by XPS, FTIR, TGA and AFM measurements, showing the grafting content up to 78 wt % and homogeneous 2D brush-like morphology from A FM observations. The efficient polymer-chain grafting makes the grapheme homogeneously dispersed in PA6 matrix and depresses the crystallization of PA6 chains. Furthermore, we prepared NG fibers by melt spinning process, and found that the tensile strength increased by 2.1 folds and Young's modulus increased by 2.4 folds with the graphene loading of 0.1 wt % only, revealing an excellent reinforcement to composites by graphene. The in situ condensation polymerization approach paves the way to prepare graphene-based nanocomposites of condensation polymers with high performances and novel functionalities.
引用
收藏
页码:6716 / 6723
页数:8
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