| ZONG Li-jun,LI Xin-geng,WU Ya-ping,MI Chun-xu,JIANG Bo.Preparation of Superhydrophobic SiO2/FEVE Composite Coating[J],48(4):215-222 |
| Preparation of Superhydrophobic SiO2/FEVE Composite Coating |
| Received:September 13, 2018 Revised:April 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.04.031 |
| KeyWord:superhydrophobic FEVE composite coating nano silica coating formula |
| Author | Institution |
| ZONG Li-jun |
Electric Power Research Institute, State Grid Shandong Electric Power Company, Jinan , China |
| LI Xin-geng |
Electric Power Research Institute, State Grid Shandong Electric Power Company, Jinan , China |
| WU Ya-ping |
Electric Power Research Institute, State Grid Shandong Electric Power Company, Jinan , China |
| MI Chun-xu |
Electric Power Research Institute, State Grid Shandong Electric Power Company, Jinan , China |
| JIANG Bo |
Electric Power Research Institute, State Grid Shandong Electric Power Company, Jinan , China |
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| Abstract: |
| The work aims to prepare superhydrophobic SiO2/FEVE composite coating. SiO2 filler was added into FEVE resin by physical mixing to obtain the superhydrophobic painting and then the superhydrophobic coating was formed on the glass sheet by atomized spraying. Surface drying time of the coating was measured by finger contact method and the hydrophobicity and micro-morphology of superhydrophobic SiO2/FEVE composite coatings were detected by contact angle meter, scanning electron microscopy (SEM) and atomic force microscopy (AFM). In addition, the adhesion of the coating was evaluated through scratch adhesion testing. The mixed solvent of ethyl acetate and butyl acetate was chosen based on the principle of similar solubility parameters and environmental protection. The optimal formulation of superhydrophobic SiO2/FEVE composite coating was composed of 100 g FEVE resin, 135 g ethyl acetate, 90 g butyl acetate, 25 g D-SiO2 and 10.5 g HDI. Spraying process combined with large atomization quality and high flow was adopted to prepare the superhydrophobic SiO2/FEVE composite coating. Coral-like micro-structures were formed in the coating and the coating surface appeared as rough microstructures constructed by alternative distribution of protuberance and concave filed. Water contact angle and sliding angle of the superhydrophobic SiO2/FEVE coating could reach 152.8° and 8° respectively. The bonding force and film-forming ability can not be improved by adjusting the solvents and curing agent proportion, but the filler proportion is the key parameter affecting the film-forming ability and superhydrophilicity. Superior hydrophobicity of the coating is attributed to surface micro-rough structure formed by orderly distribution of micro-nano concave-convex structure. |
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