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UV-Curable Polyborosilazane Precursors for SiBCN Coatings under Harsh Environments AITranslate

Yangzhong Zhao; Tianhao Li; Yanpei Dang; Erxiao Wu; Jiaqi Sun; Xiao Zhang; Shiyu Du; Xiaoling Liu; Xiaosu Yi; Ping Cui; Yujie Song; Liu He
The University of Nottingham; People’s Republic of China|Qianwan Institute of CNITECH; People’s Republic of China|Qianwan Institute of CNITECH; People’s Republic of China|Qianwan Institute of CNITECH; People’s Republic of China|Qianwan Institute of CNITECH; The Hong Kong Polytechnic University; People’s Republic of China|Qianwan Institute of CNITECH; The University of Nottingham; The University of Nottingham; The University of Nottingham; People’s Republic of China|Qianwan Institute of CNITECH; People’s Republic of China|Qianwan Institute of CNITECH
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Publisher: ACS
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Abstract AITranslate

UV irradiation is a well-established and effective process for polymer curing. However, it has been largely ignored in the field of polymer-derived ceramics (PDCs) due to its intricate mechanism and strict requirements for the precursor molecular structure. The current work designs and synthesizes a series of UV-curable polyborosilazanes containing various vinyl groups, simultaneously examines the effect of UV curing, and investigates the mechanism of curing. Cyclization mechanisms involving vinyl-free radicals and silyl-free radicals are postulated based on the molecular structure of the precursor before and after curing. The ceramic yield of UV-cured precursors is increased by up to 9.0 wt %. Moreover, SiBCN ceramics, pyrolyzed from UV-cured precursors, exhibit excellent thermal stability and remain amorphous at temperatures of up to 1600 °C. The mechanistic interpretation of UV curing opens horizons for the design and application of UV-curable ceramic precursors.

KeyWords AITranslate

UV curing polyborosilazanes SiBCN ceramics UV curing mechanisms polymerderived ceramics
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Basic Information:

DOI：https://doi.org/10.1021/acsapm.2c02141

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Citation Information:

UV irradiation is a well-established and effective process for polymer curing. However, it has been largely ignored in the field of polymer-derived ceramics (PDCs) due to its intricate mechanism and strict requirements for the precursor molecular structure. The current work designs and synthesizes a series of UV-curable polyborosilazanes containing various vinyl groups, simultaneously examines the effect of UV curing, and investigates the mechanism of curing. Cyclization mechanisms involving vinyl-free radicals and silyl-free radicals are postulated based on the molecular structure of the precursor before and after curing. The ceramic yield of UV-cured precursors is increased by up to 9.0 wt %. Moreover, SiBCN ceramics, pyrolyzed from UV-cured precursors, exhibit excellent thermal stability and remain amorphous at temperatures of up to 1600 °C. The mechanistic interpretation of UV curing opens horizons for the design and application of UV-curable ceramic precursors.

quote

GB/T 7714-2015 [1] Yangzhong Zhao, Tianhao Li, Yanpei Dang, et al. ACS Applied Polymer Materials, 2023(5). DOI:10.1021/acsapm.2c02141.
MLA [1] Yangzhong Zhao, et al., ACS Applied Polymer Materials, no. 5, 2023, https://doi.org/10.1021/acsapm.2c02141.
APA [1] Yangzhong Zhao, Tianhao Li, Yanpei Dang, Erxiao Wu, Jiaqi Sun, Xiao Zhang, Shiyu Du, Xiaoling Liu, Xiaosu Yi, Ping Cui, Yujie Song, & Liu He. (2023). ACS Applied Polymer Materials(5). https://doi.org/10.1021/acsapm.2c02141
IEEE [1] Yangzhong Zhao, Tianhao Li, Yanpei Dang, Erxiao Wu, Jiaqi Sun, Xiao Zhang, Shiyu Du, Xiaoling Liu, Xiaosu Yi, Ping Cui, Yujie Song, and Liu He, ACS Applied Polymer Materials, no. 5, 2023, doi: 10.1021/acsapm.2c02141. keywords: {UV curing;polyborosilazanes;SiBCN ceramics;UV curing mechanisms;polymerderived ceramics}