One-step synthesis of epoxy-based silicon prepolymers and its application in UV-curable coating

IF 2.3 4区 材料科学 Q2 Chemistry Journal of Coatings Technology and Research Pub Date : 2022-10-11 DOI:10.1007/s11998-022-00672-4
Fuping Bian, Xiaoquan Li, Jihe Zhao, Jiwen Hu, Xuefeng Gui, Shi Li, Shudong Lin
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引用次数: 2

Abstract

As described herein, a simple one-step hydrosilylation reaction was employed to synthesize alicyclic epoxy silicone prepolymers by using poly(dimethylsiloxane-co-methylhydrosiloxane) (PDMS-PHMS) with different hydrogen contents and 4-vinyl-1-cyclohexene-1,2 epoxide (VCHO) as precursors. The structures of the synthesized epoxy polysiloxane oligomer was characterized by Fourier-transform infrared (FTIR) and proton nuclear magnetic resonance (1H-NMR) spectroscopy techniques, thus confirming the successful synthesis of the prepolymers. With the addition of an appropriate amount of cationic photoinitiator, the epoxy polysiloxane prepolymers undergo cationic polymerization under ultraviolet light irradiation and were quickly cured to yield series of epoxy polysiloxane resin films. The performances of these cured films were tested and characterized by various techniques such as UV transmittance, thermal weight loss analysis, and contact angle and pencil hardness measurements. The results revealed that the surfaces of these films were uniform and transparent, and these films had excellent heat resistance, acid resistance, hydrophobicity, and ink removal properties. In addition, the influence of the cycloaliphatic epoxy monomer content on the curing behavior and network performance is explored. This study reveals that the curing rate increases as the amount of grafted cycloaliphatic epoxy monomer is increased and that a denser crosslinking network provides the resultant film. Finally, the photocurable silicone material investigated herein is simple to prepare and has excellent performance, and has potential applications in the field of anti-smudge coatings.

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一步法合成环氧基硅预聚物及其在紫外光固化涂料中的应用
本文以不同氢含量的聚二甲基硅氧烷-共甲基氢硅氧烷(PDMS-PHMS)和4-乙烯基-1-环己烯-1,2环氧化物(VCHO)为前驱体,采用简单的一步硅氢化反应合成了脂环环氧有机硅预聚物。采用傅里叶红外(FTIR)和质子核磁共振(1H-NMR)技术对合成的环氧聚硅氧烷低聚物进行了结构表征,证实了预聚物的成功合成。在加入适量阳离子光引发剂的条件下,将环氧聚硅氧烷预聚物在紫外光照射下进行阳离子聚合,快速固化得到系列环氧聚硅氧烷树脂薄膜。通过紫外线透射率、热失重分析、接触角和铅笔硬度测量等多种技术对固化膜的性能进行了测试和表征。结果表明,薄膜表面均匀透明,具有优异的耐热、耐酸、疏水性和脱墨性能。此外,还探讨了环脂肪族环氧单体含量对固化行为和网络性能的影响。研究表明,随着环脂肪族环氧单体接枝量的增加,固化速率也随之提高,所得到的膜具有更致密的交联网络。最后,本文研究的光固化有机硅材料制备简单,性能优异,在防污涂料领域具有潜在的应用前景。
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来源期刊
Journal of Coatings Technology and Research
Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS
CiteScore
4.40
自引率
8.70%
发文量
0
期刊介绍: Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.
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