Study on Ablation Resistance of MWCNTs Reinforced Silicone Rubber

BAI Haobi; TIAN Xiaotao; HU Bowen

doi:10.15892/j.cnki.djzdxb.2023.01.017

Journal of Projectiles, Rockets, Missiles and Guidance >

2023 , Vol. 43 >Issue 1: 117 - 122

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.01.017

Study on Ablation Resistance of MWCNTs Reinforced Silicone Rubber

BAI Haobi ,
TIAN Xiaotao ,
HU Bowen

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Xi’an Modern Control Technology Research Institute,Xi’an 710065,Shaanxi, China

Received date: 2022-09-19

Online published: 2025-02-01

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Abstract

In order with excellent physicochemical properties, multi-walled carbon nanotubes (MWCNTs) can be used as reinforcing fillers to improve the properties of composite materials. The mechanism of MWCNTs to improve the ablative corrosion resistance of room temperature vulcanized (RTV) silicone rubber materials has not been studied in depth. To investigate the effect of MWCNTs on the ablation resistance of RTV silicone rubber, different formulations of MWCNTs/RTV silicone rubber composites were prepared by solution blending method. The ablation characteristics were studied by oxyacetylene ablation test combined with scanning electron microscopy (SEM), and the microscopic morphology of the carbonized layer was analyzed to reveal the intrinsic mechanism of carbon nanotubes to improve the ablation resistance of RTV silicone rubber composites in terms of carbonized layer structure, porosity, and pyrolysis gas deposition. The results show that MWCNTs have enhanced the ablation resistance of silicone rubber, with the lowest wire ablation rate of 0.133 mm/s and the lowest carbonized ablation rate of 0.186 mm/s at the addition of 1 part, which are 21.5% and 12.8% lower than those of the materials without MWCNTs. The addition of MWCNTs increased the structural strength of the carbonized layer, promoted the formation of dense layer, and effectively improved the ablation resistance of silicone rubber.

Key words： multi-walled carbon nanotubes; ablation resistance; thermal insulation materials; room temperature vulcanized silicone rubber; charring layer

Cite this article

BAI Haobi , TIAN Xiaotao , HU Bowen . Study on Ablation Resistance of MWCNTs Reinforced Silicone Rubber[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2023 , 43(1) : 117 -122 . DOI: 10.15892/j.cnki.djzdxb.2023.01.017

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