Rapid hybrid microwave cladding of SiO2/TiO2 sol–gel derived composite coatings

被引:0
作者
Ka-Wai Yeung
Ling Chen
Chak-Yin Tang
Man-Tik Choy
Akeem Damilola Akinwekomi
Wing-Cheung Law
Gary Chi-Pong Tsui
机构
[1] The Hong Kong Polytechnic University,Department of Industrial and Systems Engineering
[2] Manufacturing BU,Department of Metallurgical and Materials Engineering
[3] CSIRO,undefined
[4] The Federal University of Technology,undefined
来源
Journal of Sol-Gel Science and Technology | 2021年 / 98卷
关键词
Sol–gel processing; Microwave susceptor heating; SiO; /TiO; composite coating; Scratch resistance; UV protection; Nanoindentation;
D O I
暂无
中图分类号
学科分类号
摘要
UV protection and coatings for plastics are important in many applications. The cladding of low microwave (MW) absorption composite coatings on high MW transparent plastic substrates is a challenge due to their disparate dielectric properties. Moreover, an uneven heat energy conversion within the composite creates an additional hurdle in producing a coating with good surface integrity. In this study, a protocol was developed to overcome these difficulties based on a hybrid approach. The adverse effect of temperature mismatch between the coating and substrate was reduced through a two-way susceptor-aided heating mechanism. Low MW absorbing sol–gel derived composite coatings consisting of silicon dioxide (SiO2) and titanium dioxide (TiO2) were successfully cladded on the surface of MW and visual light transparent polycarbonate to produce a clear protective coating with UV-resistance. Nanoindentation tests were conducted to assess the effectiveness of the proposed protocol. Significant enhancement in the surface elastic modulus and hardness were achieved.
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页码:35 / 44
页数:9
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