A resistive-type sensor based on flexible multi-walled carbon nanotubes and polyacrylic acid composite films

作者：Lee Jeongah; Cho Daehwan^*; Jeong Youngjin

来源：Solid-State Electronics, 2013, 87: 80-84.

DOI：10.1016/j.sse.2013.05.001

• Carbon nanotubes
• Super absorbent polymer
• Humidity sensor
• Poly(acrylic acid)

A humidity sensor film was fabricated by loading high numbers of multi-wall carbon nanotubes (MWCNTs) in a poly(acrylic acid) (PAA) polymer matrix containing poly(4-styrenesulfonic acid) (PSS) to enhance the MWCNT dispersion. Cross-section images demonstrate that the MWCNTs distribute evenly throughout the matrix. The fabrication processes and sensing mechanisms of the film are explained to investigate the flexible properties and humidity-sensing characteristics of the film. The film loaded with 33 wt% MWCNTs is much more flexible than an overhead projector (OHP) film and shows similar electrical resistance to pure CNT Bucky paper. The sensor film composed of 1:2 MWCNTs:PAA is highly sensitive to humidity (0.069/%RH) and displays good linearity (0.99).

• 出版日期2013-9