Issue 2, 2022

Synthesis of a grape-like conductive carbon black/Ag hybrid as the conductive filler for soft silicone rubber

Abstract

Conductive silicone rubber (CSR) is an outstanding stretchable conductive composite due to its excellent mechanical properties and stable conductivity. In this paper, silver nanoparticles were deposited on carbon black (CB) through a reduction reaction. The uniform dispersion of silver particles on the surface of CB as well as the grape-like branch structure of hybrid particles was formed by the condensation reaction of the hydroxyl groups of CB with (3-mercaptopropyl) trimethoxysilane (KH-590), along with the interattraction between sulfhydryl groups of KH-590 and silver ions. This sulfhydryl modified conductive carbon black/Ag hybrid filler (SMCB@Ag) avoided the high processing viscosity of CSR caused by the hydroxyl groups of CB. The percolation threshold of CSR made from SMCB@Ag was 5.5 wt% according to the percolation equation. With the addition amount of SMCB@Ag increasing to 10 wt%, the conductivity of CSR increased from 10−5 to about 101. Moreover, the conductivity of this CSR showed excellent stability with extension of storage time and increase of stretching-recovery cycles.

Graphical abstract: Synthesis of a grape-like conductive carbon black/Ag hybrid as the conductive filler for soft silicone rubber

Supplementary files

Article information

Article type
Paper
Submitted
26 Nov 2021
Accepted
22 Dec 2021
First published
05 Jan 2022
This article is Open Access
Creative Commons BY license

RSC Adv., 2022,12, 1184-1193

Synthesis of a grape-like conductive carbon black/Ag hybrid as the conductive filler for soft silicone rubber

Y. Dou, H. Gu, S. Sun, W. Yao and D. Guan, RSC Adv., 2022, 12, 1184 DOI: 10.1039/D1RA08649A

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