UV-Curable polyborosilazane precursors for SiBCN coatings under harsh environments

Yangzhong Zhao; Tianhao Li; Yanpei Dang; Erxiao Wu; Jiaqi Sun; Xiao Zhang; Shiyu Du; Xiaoling Liu; Xiaosu Yi; Ping Cui; Yujie Song; Liu He

doi:10.1021/acsapm.2c02141

UV-Curable polyborosilazane precursors for SiBCN coatings under harsh environments

Yangzhong Zhao
, Tianhao Li
, Yanpei Dang
, Erxiao Wu
, Jiaqi Sun
, Xiao Zhang
, Shiyu Du
, Xiaoling Liu
, Xiaosu Yi
, Ping Cui
, Yujie Song
, Liu He

Research output: Journal Publication › Article › peer-review

9 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	2166-2176
Number of pages	11
Journal	ACS Applied Polymer Materials
Volume	5
Issue number	3
DOIs	https://doi.org/10.1021/acsapm.2c02141
Publication status	Published - 10 Mar 2023

Free Keywords

SiBCN ceramics
UV curing
UV curing mechanisms
Polyborosilazanes
Polymer-derived ceramics

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10.1021/acsapm.2c02141

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title = "UV-Curable polyborosilazane precursors for SiBCN coatings under harsh environments",

abstract = "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 = "SiBCN ceramics, UV curing, UV curing mechanisms, Polyborosilazanes, Polymer-derived ceramics",

author = "Yangzhong Zhao and Tianhao Li and Yanpei Dang and Erxiao Wu and Jiaqi Sun and Xiao Zhang and Shiyu Du and Xiaoling Liu and Xiaosu Yi and Ping Cui and Yujie Song and Liu He",

note = "This work was supported by the National Key R \& D Program of China (Grant No. 2021YFB3200500), the Chinese Academy of Sciencethe , Key R \& D Projects of Zhejiang Province (Grant No. 2022C01236), and the Ningbo 3315 Plan (Grant No. 2018A-03-A). National Science Foundation of China (Grant No. 51902319).",

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doi = "10.1021/acsapm.2c02141",

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AU - Zhao, Yangzhong

AU - Li, Tianhao

AU - Dang, Yanpei

AU - Wu, Erxiao

AU - Sun, Jiaqi

AU - Zhang, Xiao

AU - Du, Shiyu

AU - Liu, Xiaoling

AU - Yi, Xiaosu

AU - Cui, Ping

AU - Song, Yujie

AU - He, Liu

N1 - This work was supported by the National Key R & D Program of China (Grant No. 2021YFB3200500), the Chinese Academy of Sciencethe , Key R & D Projects of Zhejiang Province (Grant No. 2022C01236), and the Ningbo 3315 Plan (Grant No. 2018A-03-A). National Science Foundation of China (Grant No. 51902319).

PY - 2023/3/10

Y1 - 2023/3/10

N2 - 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.

AB - 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.

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KW - UV curing mechanisms

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UV-Curable polyborosilazane precursors for SiBCN coatings under harsh environments

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