Polyisoprene/Nanostructured Carbon Composites for Applications in Temperature Sensors

Abstract

Abstract. The studies of electrical properties of the polyisoprene (PI) matrix/high structure carbon black (HSCB) composites (PCBC) with various concentrations (8, 9, 10 and 11 mass parts) of filler have been carried out in the temperature interval of 90K-330K. In this paper we focus on the investigation of direct current (DC) conductivity in a low-temperature region with negative temperature coefficient of resistivity (NTCR). It has been proven that variable range hopping (VRH) conduction is dominated by hopping of carriers among localized states in a low-temperature range. At higher temperatures the nearest neighbour hopping (NNH) conductivity or constant range hopping charge transport takes place. The reversibility as well as small hysteresis of resistance change versus temperature indicates prospective temperature sensor application for PCBC.

Observation of Different Charge Transport Processes and Origin of Magnetism in rGO and rGO-ZnSe Composite

“…30 Similar measurements on rGO-based nanocomposites have been conducted to reveal the dominant transport mechanism of those systems. Knite et al reported a crossover from Mott-VRH to nearest neighbor hopping (Arrhenius) on polyisoprene/nanostructured carbon composite at ∼230 K. 31 In a limited temperature range (300−373 K), Nagesh Kumar et al observed Mott 3D-VRH transport process in rGO-ZnO nanocomposite. 32 Song et al used parallel register model to represent the temperature dependence of resistivity across metal−insulator transition in a hexagonal boron nitride− graphene hybrid composite and reported ES-VRH as the dominant transport process only in the insulating region of temperature dependence.…”

“…Similar measurements on rGO-based nanocomposites have been conducted to reveal the dominant transport mechanism of those systems. Knite et al reported a crossover from Mott-VRH to nearest neighbor hopping (Arrhenius) on polyisoprene/nanostructured carbon composite at ∼230 K . In a limited temperature range (300–373 K), Nagesh Kumar et al observed Mott 3D-VRH transport process in rGO-ZnO nanocomposite .…”