Facile Preparation of Lightweight Microcellular Polyetherimide/Graphene Composite Foams for Electromagnetic Interference Shielding

被引：671
|
作者：
Ling, Jianqiang [1 ,2 ]
Zhai, Wentao [1 ]
Feng, Weiwei [1 ]
Shen, Bin [1 ]
Zhang, Jianfeng [2 ]
Zheng, Wen Ge [1 ]
机构：
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo Key Lab Polymer Mat, Ningbo 315201, Zhejiang, Peoples R China
[2] Ningbo Univ, Sch Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China
来源：
ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 07期
基金：
中国国家自然科学基金;
关键词：
polyetherimide; microcellular foam; graphene; electrical conductivity; electromagnetic interference shielding; THERMAL-CONDUCTIVITY; NANOCOMPOSITES FOAMS; CONTINUOUS EXTRUSION; CARBON NANOTUBES; GRAPHENE;
D O I：
10.1021/am303289m
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report a facile approach to produce lightweight microcellular polyetherimide (PEI)/graphene nanocomposite foams with a density of about 0.3 g/cm(3) by a phase separation process. It was observed that the strong extensional flow generated during cell growth induced the enrichment and orientation of graphene on cell walls. This action decreased the electrical conductivity percolation from 0.21 vol % for PEI/graphene nanocomposite to 0.18 vol % for PEI/graphene foam. Furthermore, the foaming process significantly increased the specific electromagnetic interference (EMI) shielding effectiveness from 17 to 44 dB/(g/cm(3)). In addition, PEI/graphene nanocomposite foams possessed low thermal conductivity of 0.065-0.037 W/m.K even at 200 degrees C and high Young's modulus of 180-290 MPa.
引用
收藏
页码：2677 / 2684
页数：8
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