期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 7, 页码 2677-2684出版社
AMER CHEMICAL SOC
DOI: 10.1021/am303289m
关键词
polyetherimide; microcellular foam; graphene; electrical conductivity; electromagnetic interference shielding
资金
- Nanjing Yuezi Chemical Ltd
- National Natural Science Foundation of China [51003115]
- Ningbo Natural Science Foundation [2011A6101118]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据