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

Overview

Journal ACS Appl Mater Interfaces

Publisher American Chemical Society

Specialties Biomedical Engineering
Biotechnology

Date 2013 Mar 8

PMID 23465462

Citations 56

Authors

Jianqiang Ling

Wentao Zhai

Weiwei Feng

Bin Shen

Jianfeng Zhang

Wen ge Zheng

Affiliations

Soon will be listed here.

Abstract

We report a facile approach to produce lightweight microcellular polyetherimide (PEI)/graphene nanocomposite foams with a density of about 0.3 g/cm3 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/cm3). In addition, PEI/graphene nanocomposite foams possessed low thermal conductivity of 0.065-0.037 W/m·K even at 200 °C and high Young's modulus of 180-290 MPa.

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