Effect of surfactants and thickness of carbon nanotube film on conductive property for touch screen

Abstract

Conductive transparent film technology has been developed extensively for the electronics industry such as display, touch panel and so on. We studied the effects of surfactants and thickness of single-walled carbon nanotube (SWCNT) film on conductivity and transparency. The wire-bar coating technique was used to produce a conductive PET film base. Triton X-100 is Hydrocarbon and Dow corning 193C fluid is silicone non-ionic surfactant types were chosen by varying concentration to disperse the single-walled carbon nanotubes (SWCNT) in acrylic resin. Multi coating technique was proposed to obtain different thickness. Results showed Silicone surfactant gave better results than Hydrocarbon surfactant, the optimum sheet resistance was at 8.91x10 2 Ω/sq with 87% transmittance (including PET film) and 2.63x10 3 Ω/sq with 86% transmittance by using 2.0% of silicone and hydrocarbon surfactant respectively with the film thickness of 250 microns.