Adherable temperature sensor to a porous structure of fiber via reduced graphene oxide and poly(diallyldimethylammonium chloride) complex

Abstract

Abstract We present an adherable temperature sensor on aramid fiber filament coated with reduced graphene oxide (rGO) and poly(diallyldimethylammonium chloride) (PDADMAC) complex. The PDADMAC dispersed in a graphene oxide aqueous solution was dried and reduced to an rGO-PDADMAC complex with laser irradiation. The rGO-PDADMAC sensor was characterized with a scanning electron microscope and Raman spectroscopy. The rGO-PDADMAC sensor showed a negative temperature coefficient resistance change at 40% relative humidity (RH). Furthermore, the sensor successfully detected 58% resistance variation from 25 °C to 100 °C as the pristine rGO sensor showed 61% resistance variation on a rigid surface. Also, the rGO-PDADMAC sensor demonstrated long-term reliability of 3% sensitivity for seven days in normal room conditions at 25 °C and 40% RH. Additionally, the adherable temperature sensor of the rGO-PDADMAC complex viscous to the porous structure of aramid fiber detected 55% sensitivity from 25 °C to 100 °C.