Composition Design and Performance Assessment of Superhydrophobic Coating Based on Fluorine-Silicone Resin
LI Quanwei1, LIU Lele2, ZHAO Piqi1,*, YU Youliang3, SHAO Mingjun3, LU Lingchao1
1 Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China 2 China Testing & Certification International Group Xi'an Co., Ltd., Xi'an 710061, China 3 Haihui Group Co., Ltd., Rizhao 276500, Shandong, China
Abstract: The superhydrophobic coating has attracted increasing attention due to excellent water resistance, self-cleaning and corrosion resistance. However, the simple and efficient preparation method of superhydrophobic coating with high stability is a major challenge. In this study, fluorine-silicone (F-Si) resin, hydrophobic fumed silica (Hy-SiO2) and KH-550 were uniformly dispersed according to the established process using ethyl acetate as solvent medium to improve their matching effect. The optimum ratio of superhydrophobic coatings was determined by an orthogonal test with water contact angle (WCA), rolling angle (RA) and friction loss rate (FL) as parameters. On this basis, the effect of superhydrophobic coatings on different substrates, its stain resistance, thermal stability and moisture resistance were studied. The results show that the coating has a WCA of 154.3°, RA of 1.7°, FL of 8.8%, and excellent stability when m(F-Si resin)∶m(Hy-SiO2)∶m(ethyl acetate)=1:0.2:15. Different substrate types have great influence on the superhydrophobicity of the coating, but the performance was the best on the cement substrate. Through SEM analysis, it is found that the surface of the cement substrate has micron-level roughness, which co-constructs with the nano-particles in the superhydrophobic coating, forming the micro-nano-rough structure of the superhydrophobic surface. In addition, the coating still has the superhydrophobicity, better stain resistance and heat resistance after being heated at 300 ℃ for 1 h and placed at 40% relative humidity for 6 d.
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2023, Vol. 37 
