3D network porous polymeric composites with outstanding electromagnetic interference shielding. (23rd March 2016)

• Record Type: Journal Article
• Authors: Wang, Hui; Zheng, Kang; Zhang, Xian; Ding, Xin; Zhang, Zhongxiang; Bao, Chao; Guo, Le; Chen, Lin; Tian, Xingyou
• Is Part Of: Composites science and technology. Volume 125(2016)
• Page Start: 22
• Page End: 29
• Publication Date: 2016-03-23
• Subjects: A. Carbon nanotubes -- A. Nano composites -- A. Polymer-matrix composites (PMCs) -- B. Electrical properties -- B. Porosity/voids; Composite materials -- Periodicals; Composite materials; Fibrous composites; Periodicals; 620.118
• DOI: 10.1016/j.compscitech.2016.01.007
• Languages: English
• ISSNs: 0266-3538

Abstract

Abstract: A novel and highly efficient technique, combination of hot-pressing and selective etching, was proposed to manufacture porous nanocomposites based on poly(vinylidene fluoride) (PVDF) and multiwall carbon nanotubes (MWCNTs) with three-dimensional(3D) networks. Benefitting from the 3D conductive network, a dramatic change in electrical conductivity was observed from 10 −16 S cm −1 for pure PVDF to 1 S cm −1 for porous nanocomposites (at 15 wt% MWCNTs loading). In addition, the obtained porous composites achieved an electromagnetic interference (EMI) shielding effectiveness (SE) of approximately 56.72 dB with a density of 0.79 g cm −3 and a thickness of only 2 mm. The EMI shielding mechanisms of such porous materials were also discussed and it suggested that the dominant contribution to EMI SE was absorption rather than reflection in the X-band frequency region.