Preparation, mechanical and thermal properties of functionalized graphene/polyimide nanocomposites

被引：163
|
作者：
Zhang, Li-Bin [1 ,2 ]
Wang, Jin-Qing [1 ]
Wang, Hong-Gang [1 ]
Xu, Ye [1 ,2 ]
Wang, Zhao-Feng [1 ]
Li, Zhang-Peng [1 ,2 ]
Mi, Yong-Juan [1 ,2 ]
Yang, Sheng-Rong [1 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100080, Peoples R China
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2012年 / 43卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Polymer-matrix composites (PMCs); Nano-structures; Mechanical properties; Casting; CHEMICALLY DERIVED GRAPHENE; EXFOLIATED GRAPHITE OXIDE; X-RAY PHOTOELECTRON; EXPANDED GRAPHITE; FUEL-CELL; POLYIMIDE; REDUCTION; COMPOSITES; MEMBRANE; ROUTE;
D O I：
10.1016/j.compositesa.2012.03.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Graphene oxide sheets with isocyanate functional groups (GO-NCO) were firstly synthesized and functionalized graphene/polyimide (FGS/PI) nanocomposites were subsequently prepared by typical solution casting and thermal imidization. The chemical changes of GO-NCO during the preparation of FGS/PI nanocomposites were carefully characterized by Fourier transfer infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses. As a result, the morphology analysis indicated that the FGS were dispersed in the PI matrix and were aligned more orderly with increasing the FGS contents. The tensile strength and the modulus of FGS/PI nanocomposites were significantly increased by 60% with a small quantity of 0.75 wt% FGS incorporated and decreased beyond that dosage. Moreover, the thermo-gravimetric analysis (TGA) results revealed that the thermal stability of PI was slightly improved by the incorporation of FGS. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1537 / 1545
页数：9
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