Preparation of thermostable PBO/graphene nanocomposites with high dielectric constant

被引：40

作者：

Chen, Yi ^{[1
]}

Zhuang, Qixin ^{[1
]}

Liu, Xiaoyun ^{[1
]}

Liu, Jun ^{[1
]}

Lin, Shaoliang ^{[1
]}

Han, Zhewen ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

来源：

NANOTECHNOLOGY | 2013年 / 24卷 / 24期

基金：

中国国家自然科学基金;

关键词：

ELECTRICAL ENERGY-STORAGE; POLYMER NANOCOMPOSITES; CARBON NANOTUBES; MECHANICAL-PROPERTIES; THERMAL-PROPERTIES; HIGH-PERMITTIVITY; GRAPHENE SHEETS; HYBRID MATERIAL; COMPOSITES; STRENGTH;

D O I：

10.1088/0957-4484/24/24/245702

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, poly(p-phenylene benzobisoxazole) (PBO)/graphene composites were prepared using PBO and poly(4,6-dihydroxymetaphenylenediamine terephthalamide) (PHA)-modified graphene oxide (GO-PHA). PHA is the precursor of PBO. GO-PHA was obtained via chemical coupling reaction of amino-terminated PHA and acyl-chloride-functionalized GO. Partially reduced graphene nanosheets and benzoxazole rings were formed after heating. GO-PHA could be stably dispersed in methane sulfonic acid (MSA), which facilitated its uniform distribution in the PBO matrix. The PBO/graphene nanocomposites were obtained by the dissolution of GO-PHA and PBO in MSA. The thermogravimetric analysis results showed that the PBO/graphene composites had good thermal stability below 400 degrees C. The dielectric constant of the composites increased as the amount of GO-PHA increased, and the percolation threshold was f(c) = 0.037. The nanocomposite had a dielectric constant of 15.8, which was approximately five times larger than that of pure PBO polymer.

引用

页数：11

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