Chang Mengru1， Lee Ying-lin2, Xu Lei1, 3, Wang Chunhong1
(1. Tianjin University of Technology and Education, College of Textiles, Tianjin 300387; 2. College of Arts, Qilu University of Technology, Jinan 250353; 3. Qingdao Jifa Group Research Institute, Jimu 200366)
Abstract:Using electrostatic assembly technology, a "grapevine" structure of carbon black (CB)/multi-walled carbon nanotubes (MWCNT) nanocomposite material was fabricated. This material was then used as a conductive filler, and after mixing, pressing, and curing, a flexible conductive silicone rubber (SR) composite material was produced. The assembly effects, dispersion states, and piezoresistive properties of different ratios and concentrations of CB and MWCNT were studied using transmission electron microscopy, scanning electron microscopy, and pressure-resistance tests. The results showed that the best assembly effect was achieved with a volume ratio of CB to MWCNT of 3:2. The "grapevine" structure formed by electrostatic assembly improved the conductivity and piezoresistive properties of CB/MWCNT/SR. The leakage threshold of CB/MWCNT/SR was 22%, and when subjected to 25N pressure, the resistivity decreased by approximately 30%, indicating that CB/MWCNT/SR exhibits good piezoresistive properties.
Keywords:Carbon black Carbon nanotubes Silicone rubber Static assembly Piezoelectric properties
The article was published in "New Chemical Materials" magazine, 2019, Issue 1.