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Transparent and Hard Siloxane Based Hybrid UV-Curable Coating Materials with Amphiphobic Properties. 2021

Keuk-Min Jeong, and Sung Soo Park, and Saravanan Nagappan, and Heekyung Jin, and Guoquan Min, and Yongxu Zhang, and Minming Qu, and Yan Zhang, and Chang-Sik Ha
Department of Polymer Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea.

In this study, highly transparent siloxane-based hybrid UV-curable coating materials were prepared using (acryloxypropyl)methylsiloxane monomer (APMS), a thiol-ene monomer, with benzoin ethyl ether. For the thiol-ene monomer, either pentaerythritol tetrakis(3-mercaptopropionate) (PETTMP) or trimethylolpropane tris(3-mercaptopropionate) (TMPTMP) was used. The siloxane-based hybrid coating materials were highly transparent and hard (pencil hardness of 6-7H). The materials were also amphiphobic, with a water static contact angle of 92-100° and an oil contact angle of 46-63°, when prepared with a high siloxane-monomer-to-PETTMP/TMPTMP ratio. In general, both hybrid coating materials exhibited improved oleophobicity, high hardness, and surface smoothness with increasing siloxane content, although the TMPTMP-based hybrid coating films exhibited slightly higher oleophobicity (lower hydrophobicity) and a smoother surface than the PETTMP-based hybrid coating films.

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