Investigation of piezo-capacitance and piezo-resistance properties of solid silicone rubber-conductive carbon black composites

Shankar, B. S. Manohar; Kulkarni, S. M.

doi:10.1063/1.5085605

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…Two approaches for improving the permittivity are followed in literature, one is by adding high dielectric constant fillers such as barium titanate [17] to obtain dielectric-dielectric composites (DDC) and other by adding conductive fillers such as nickel [12] and carbon black [11] to obtain conductor-dielectric composites (CDC) [24,25]. Barium titanate has been used to improve the permittivity of the composite for sensor application due to high dielectric constant, low cost and wide availability [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of fillers on the piezocapacitive behaviour of silicone rubber particulate composites

Shankar,

Kulkarni

2024

Eng. Res. Express

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Robotics and fluid dynamics applications have created demand for development of electronic skins with embedded pressure sensors. These applications require simple and low-cost fabrication processes with large area deployment. Both structured and unstructured material approaches to sensor development have been followed. Among the various sensing mechanisms, piezo capacitive transduction is superior. This paper reports the influence of fillers on the piezo capacitive characteristics of unstructured solid silicone rubber composites. Dielectric, conductive and conductive-dielectric fillers were incorporated into solid silicone rubber and fabricated using high temperature compression moulding to form dielectric-dielectric, conductive-dielectric and conductive-dielectric dielectric composites. The results reveal that piezo capacitive sensitivity varies with filler type, filler loading, curing agent loading, mixing time and curing temperature. The experiments reveal improved normalized capacitance with pressure characteristics of linearity and sensitivity of 3.9 x 10-3 (kPa)-1 in the 0-20 kPa range of pressure. These composites are thus candidate materials for flexible pressure sensing applications.

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Section: Introductionmentioning

confidence: 99%

Effect of fillers on the piezocapacitive behaviour of silicone rubber particulate composites

Shankar,

Kulkarni

2024

Eng. Res. Express

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“…When integrated within the elastomer matrix, they offer a robust network of conductive filler [42]. Ketjenblack is a good filler for piezoresistive applications that have been investigated [43][44][45]. While the wealth of research is concentrated on the use of conductive fillers, there is scant literature on the use of dielectric fillers such as barium titanate for piezoresistive applications.…”

mentioning

confidence: 99%

“…High temperature vulcanized (HTV) silicone rubber is a well-known elastomer for outdoor and harsh environments, that has good weathering and aging properties. It also offers simpler and cost effective and scalable processes [53] and is a promising matrix material for these applications [45].…”

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confidence: 99%

Effect of ketjenblack and barium titanate on the piezoresistive behaviour of silicone rubber particulate composites

2021

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In the present study, silicone rubber reinforced with ketjenblack and barium titanate were fabricated using high temperature compression molding method. These particulate composites are characterized for piezoresistive sensitivity. Ketjenblack and barium titanate are the conducting and dielectric fillers in the high temperature vulcanized silicone rubber matrix. The effects of ketjenblack and barium titanate fillers, filler loading, amount of curing agent, curing temperature and mixing time on the piezoresistive properties of these composites were investigated. The piezoresistive sensitivity recorded maximum values of 3.7(10 -3 ) (kPa) −1 for dielectric and dielectric-conductive composites. The linear variation of normalized resistance change was observed for change in pressure up to 20 kPa. The dielectric composite sensitivity increases with reduction in dielectric filler and curing agent loadings, increasing with mixing time and curing temperature. The piezoresistive sensitivity for dielectricconductive composites depends on ketjenblack and barium titanate filler loading. These composites demonstrate interaction effects among the factors.

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Influence of conductive and dielectric fillers on the relaxation of solid silicone rubber composites

Hiremath

Kulkarni

2019

Mater. Res. Express

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Investigation of piezo-capacitance and piezo-resistance properties of solid silicone rubber-conductive carbon black composites

Cited by 3 publications

References 14 publications

Effect of fillers on the piezocapacitive behaviour of silicone rubber particulate composites

Effect of fillers on the piezocapacitive behaviour of silicone rubber particulate composites

Effect of ketjenblack and barium titanate on the piezoresistive behaviour of silicone rubber particulate composites

Influence of conductive and dielectric fillers on the relaxation of solid silicone rubber composites

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