Enhancing the properties of graphene oxide/natural rubber nanocomposite‐based strain sensor modified by amino‐functionalized silanes

Abstract

This work investigates the influence of modified graphene oxide (mGO) on the properties of natural rubber (NR) nanocomposites. GO was modified by amino‐functionalized silane coupling agents, that is, (3‐aminopropyl)triethoxysilane (APTES) and [3‐(2‐aminoethyl amino)propyl]trimethoxysilane (TMPES), hereafter referred to as AGO and TGO, respectively. The use of silane‐mGOs had a positive effect on the properties of the NR nanocomposites compared with unmodified GO, that is, a faster cure time, increased crosslink density, strengthened filler–rubber interaction, improved filler dispersion, and enhanced mechanical and electrical properties. Among the different types of silanes, the TGO/NR nanocomposite showed better mechanical and electrical properties than the AGO/NR nanocomposite because of its high crosslink density and strong filler–rubber interaction. To ascertain the potential for application as a strain sensor, the electrical resistance of nanocomposites during finger motion was determined. An increase in electrical resistance of the nanocomposites containing mGOs during finger motion was observed, which strongly supports the finding that NR nanocomposites containing silane‐mGOs are a potentially suitable material to produce a strain sensor.

High Barrier Properties of Butyl Rubber Composites Containing Liquid Rubber and Graphene Oxide

“…Figure 1 shows the FTIR spectra of KH570, GO and KGO. Curve (a) for KH570 exhibits characteristic peaks of Si-O-C at 1080 cm −1 and -CH 3 and -CH 2 stretching vibration peaks at 2940 cm −1 and 2840 cm −1 [ 27 , 28 ]. Curve (b) for GO exhibits characteristic peaks of C=C at 1650 cm −1 and -OH stretching vibration at 3500 cm −1 [ 29 ].…”

Graphene in rubber formulations: a comprehensive review and performance optimization insights

“…22,73,89 Identically, the presence of GO in the NR aids in the enhancement of tensile strength, elongation, and modulus at 100% strain and tear strength by 48%, 16%, 12%, and 24% respectively which are essential for durability and stretchability of flexible strain sensors. 22,73,154,155…”

“…22,73,89 Identically, the presence of GO in the NR aids in the enhancement of tensile strength, elongation, and modulus at 100% strain and tear strength by 48%, 16%, 12%, and 24% respectively which are essential for durability and stretchability of flexible strain sensors. 22,73,154,155 The flexible strain sensor is an electronic device that works by the principles of the piezoresistive effect to detect the changes in electrical resistance in response to strain. 102 When an external force is applied, the conductive network in the nanocomposite undergoes destruction causing changes in resistance.…”

Durable, highly sensitive conductive elastomeric nanocomposite films containing various graphene nanoplatelets and their derivatives

“…The tensile strength, breaking elongation, and thermal stability of the composites were improved significantly. Woraphutthaporn et al 37 modified graphene oxide using APTES and 3‐(2‐aminoethyl amino)propyl trimethoxysilane. The use of silane‐MGO enhanced the curing time, crosslink density, and filler‐rubber interaction while also improving filler dispersion, and mechanical and electrical properties of the natural rubber nanocomposites.…”