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<p>The use of high-performance elastomers in aerospace, automotive and electrical industries is increasingly becoming clearer as materials are required to withstand extreme temperature as well as chemical environments and mechanical strength. In such situations, conventional liquid silicone rubber (LSR) is not tough and strong enough. This paper proposes an improved method of processing of LSR composites with a chopped carbon fibre (CFs) intended to be used in chemically and thermally hostile environments. Composites with CF loadings between 0 and 6 wt% and sample thickness of 3, 4, and 5&#xa0;mm were prepared. Shore A hardness, as well as resistance to heat up to 800℃ and chemicals established through pH, TDS and EC testing show a high level of multi-functionality enhancement. Notably, a 6% CF addition resulted in a 63% improvement in hardness, along with enhanced thermal stability &amp; resistance to corrosive media. Given that experimental results show that random orientation of CFs can still yield composites with desirable properties to function as mechanical reinforcements, and that expensive and complex fibre orientations are not required, CF-LSR composites could find a niche in low-cost aerospace seals, EMI shielding, and tough electrical housings.</p>

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Carbon fiber-reinforced liquid silicone rubber composites exhibiting enhanced multifunctional properties for advanced industrial applications

  • 期刊论文

  • 发表日期：

    2025年12月3日

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  • Ramya Uppula,
  • Sammaiah Pulla,
  • Subbarao Medabalimi

摘要

The use of high-performance elastomers in aerospace, automotive and electrical industries is increasingly becoming clearer as materials are required to withstand extreme temperature as well as chemical environments and mechanical strength. In such situations, conventional liquid silicone rubber (LSR) is not tough and strong enough. This paper proposes an improved method of processing of LSR composites with a chopped carbon fibre (CFs) intended to be used in chemically and thermally hostile environments. Composites with CF loadings between 0 and 6 wt% and sample thickness of 3, 4, and 5 mm were prepared. Shore A hardness, as well as resistance to heat up to 800℃ and chemicals established through pH, TDS and EC testing show a high level of multi-functionality enhancement. Notably, a 6% CF addition resulted in a 63% improvement in hardness, along with enhanced thermal stability & resistance to corrosive media. Given that experimental results show that random orientation of CFs can still yield composites with desirable properties to function as mechanical reinforcements, and that expensive and complex fibre orientations are not required, CF-LSR composites could find a niche in low-cost aerospace seals, EMI shielding, and tough electrical housings.