Flexible and Biocompatible Polystyrene/Multi-walled Carbon Nanotubes Films with High Permittivity and Low Loss

Chong Wang1,2

Zheng Zhang3,Email

Xiaohui Xu4

Haikun Wu5

Dechun Liu6

Shuwei Meng1

Guixian Li7

Yulei Wei8

Xiaomin Li9

Guomin Wang10

Peitao Xie1,11,Email

Chunzhao Liu1,Email

1State Key Laboratory of Bio-fibers and Eco-textiles, Institute of Biochemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China 
2Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong, China 
3Department of Applied Mathematics, The Hong Kong Polytechnic University, Hong Kong, China 
4Department of Chemistry, Hong Kong Baptist University, Hong Kong, China 
5Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, 17923 Jingshi Road, Jinan 250061, China
6Qingdao Municipal Hospital, Qingdao 266071, China 
7The 8511 research Institute of China Aerospace Science and Industry Corporation Limited (CASIC), Nanjing, 210007, China 
8Shandong Sinocera Functional Material Co., LTD., Dongying, 257100, China
9Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
10Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, China
11Foshan (Southern China) Institute for New Materials, Foshan, 528200, China

Abstract

Percolative composites with high permittivity and low loss have drawn enormous attention in the research community, exhibiting wide range of applications in sensors, capacitors, field-effect transistors, antennas, etc. In this work, flexible and   biocompatible polystyrene/multi-walled carbon nanotubes (PS/MWCNTs) films with high permittivity and low loss near percolation threshold were achieved by solution mixing assisted with non-solvent induced phase separation (NIPS) strategy and followed by the hot press method. Cytotoxicity experiments proved that the experimental process and products are green, environmentally friendly and biocompatible. The microstructure and dielectric properties were investigated. When MWCNTs content reached 15 wt%, high permittivity and low loss were simultaneously realized. Combining the flexibility and non-toxicity, the PS/MWCNTs films with high permittivity and low loss exhibit great potentials in wearable devices, skin sensors and flexible electronics. 

Flexible and Biocompatible Polystyrene/Multi-walled Carbon Nanotubes Films with High Permittivity and Low Loss