| BAO Tian,WANG Dong.Research Progress in Silica-based Superhydrophobic Thin Films on Glass[J],48(8):156-164 |
| Research Progress in Silica-based Superhydrophobic Thin Films on Glass |
| Received:February 16, 2019 Revised:August 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.08.021 |
| KeyWord:superhydrophobic contact angle glass silica sol-gel transparent |
| Author | Institution |
| BAO Tian |
State Key Laboratory of Advanced Technology for Float Glass, Bengbu Design & Research Institute for Glass Industry, Bengbu , China |
| WANG Dong |
State Key Laboratory of Advanced Technology for Float Glass, Bengbu Design & Research Institute for Glass Industry, Bengbu , China |
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| Abstract: |
| The superhydrophobic surface brings some valuable interface properties, including anti-icing, anti-pollution, anti-oxidation, etc. For inorganic materials such as glass commonly used in industrial products, with reference to the structure and composition of superhydrophobic substances in nature, the researchers have synthesized organic-inorganic hybrid coating with micron- nanometer double rough structure and low surface energy with materials containing elements such as carbon and fluorine by various methods and prepared the super-hydrophobic surface. Due to the inherent hydrophilicity of glass surface, it is particularly important to solve the problem of both meeting the optical performance index and achieving hydrophobicity and anti-pollution in the panel display, touch screen, solar battery cover, glass curtain wall and other areas. Two theoretical models of solid-liquid composite contact and non-composite contact on rough surface were discussed firstly and then the implementation elements of superhydrophobic glass and the preparation methods of superhydrophobic film based on silica were described. For silica-based transparent superhydrophobic film on glass surface by sol-gel method, the development of preparation technology was reviewed. According to the number of coating times, sol composition, and the realization methods of the rough structures of the films, the existing preparation techniques were classified into three preparation routes, including synthesis of modified silica sol by co-precursor to deposit monolayer superhydrophobic film, surface modification method to prepare multilayer superhydrophobic film and method of adding silica particles to produce a coarse layer. Meanwhile, the principle of superhydrophobicity and the characteristics of the coatings by various methods were pointed out. For some examples, the factors influencing the properties of hydrophobicity, rough structure and optical transmittance were analyzed. For the SiO2 based superhydrophobic glass prepared by sol-gel method, how to maintain the good transparency of the glass, as well as the wear resistance and durability of the film layer is the focus of research in future. |
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