Strategy to Enhance Conductivity of Polystyrene/Graphene Composite Foams via Supercritical Carbon Dioxide Foaming Process

被引：34

作者：

Xiao, Wei ^{[1
]}

Liao, Xia ^{[1
]}

Jiang, Qiuyue ^{[1
]}

Zhang, Yuan ^{[1
]}

Chen, Jia ^{[1
]}

Yang, Qi ^{[1
]}

Li, Guangxian ^{[1
]}

机构：

[1] Sichuan Univ, State Key Lab Polymer Mat Engn, Coll Polymer Sci & Engn, Chengdu 610065, Sichuan, Peoples R China

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2018年 / 142卷

基金：

中国国家自然科学基金;

关键词：

Graphene; Nanocomposite; Microcellular; Conductive composite foam; Synergistic effect; INTERFERENCE SHIELDING EFFECTIVENESS; GRAPHENE OXIDE; NANOCOMPOSITES; CO2; PERFORMANCE; POLYURETHANE; FABRICATION; MORPHOLOGY; BLEND; FILMS;

D O I：

10.1016/j.supflu.2018.05.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Composites combining polystyrene (PS) and thermally reduced graphene with different size of sheets were fabricated by melting blending. Composites added large and small size of graphene (graphene mixture) exhibited a higher electronic conductivity. To reduce the weight of composites, PS/graphene composite foams were prepared by scCO(2) foaming process. As a result, composites included different size of graphene showed a more uniform bubbles, higher cell density and smaller cell diameter because of synergy in graphene sheets. The foams with graphene mixture also exhibited high cell density in high saturation temperature due to their higher viscosity and glass transition temperature analyzed by high-pressure rheometer and differential scanning calorimeter. For conductivity of foams, the introduced bubbles exhibited a good enhancement of electrical conductivity and percolation threshold decreased from 0.34 vol.% to 0.16 vol.%. It could be found that conductivity increased by raising pressure and decreased with the increase temperature.

引用

页码：52 / 63

页数：12

共 40 条

[1] Synthesis of conductive polyaniline-graphite nanocomposite in supercritical CO2 and its application in zinc-rich epoxy primer [J].