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Rapid Curing of Liquid Polycarbosilane and Its Conversion into Protective Coating

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Abstract

High ceramic yield, fast curing rate and high purity are essential for ceramic precursors. In this study, a SiC ceramic precursor-polycarbosilane containing both allyl group and acrylate group was synthesized. According to the 1H-NMR analysis, the molar ratio of allyl group to acrylate group was 10:1. The polycarbosilane can be cured under UV light for only 1 s and photolithography pattern with clear boundary could be formed. After pyrolysis to 1000 °C, the ceramic yield was up to 78 wt% and the pattern could be retained without cracks and deformation. The ceramic product was composed of 63.28 wt% Si, 33.37 wt% C and 3.35 wt% O, and the chemical formula was determined as SiC1.23O0.09. As a SiC ceramic precursor, the polycarbosilane was used to prepare SiC-based protective coating on carbon fiber. The obtained SiC coating was dense with a thickness of about 150 nm, significantly improving oxidation resistance of the carbon fiber.

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Acknowledgements

This work was supported by Key R & D Projects of Zhejiang Province (Grant No. 2022C01236), Advanced Energy Science and Technology Guangdong Laboratory (Grant No. HND20TDTHGC00), Ningbo Municipal Bureau of Science and Technology (Project 2020F043) and Ningbo "3315 Plan" Innovation Team Project (Grant No. 2018A-03-A).

Funding

This work was supported by Key R & D Projects of Zhejiang Province (Grant No. 2022C01236), Advanced Energy Science and Technology Guangdong Laboratory (Grant No. HND20TDTHGC00), Ningbo Municipal Bureau of Science and Technology (Project 2020F043) and Ningbo "3315 Plan" Innovation Team Project (Grant No. 2018A-03-A).

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Contributions

Jian Gong: Conceptualization, Investigation, Methodology, Formal analysis, Writing – original draft. Yuanjie Wang: Conceptualization, Methodology. Mingjiong Zhou: Formal analysis, Supervision. Xueliang Pei: Conceptualization, Methodology, Resources, Validation, Writing – review & editing, Supervision. Jing Huang: Resources, Formal analysis, Supervision. Zhengren Huang: Resources, Formal analysis, Supervision. Qing Huang: Resources, Formal analysis, Supervision.

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Correspondence to Xueliang Pei.

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Gong, J., Wang, Y., Zhou, M. et al. Rapid Curing of Liquid Polycarbosilane and Its Conversion into Protective Coating. Silicon 15, 5803–5810 (2023). https://doi.org/10.1007/s12633-023-02481-9

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