Facile fabrication of superhydrophobic coatings based on two silica sols

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• 作者：Yanfen Huang ; Shengping Yi ; Zaosheng Lv ; Chi Huang
• 关键词：Superhydrophobic ; Silica sol ; Nanocomposites ; Adhesion strength ; Thermal stability
• 刊名：Colloid & Polymer Science
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：294
• 期：9
• 页码：1503-1509
• 全文大小：1,333 KB
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• 作者单位：Yanfen Huang (1)
  Shengping Yi (2)
  Zaosheng Lv (1)
  Chi Huang (2)
  
  1. Hubei Key Laboratory of Coal Conversion and New Carbon Material, College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, 430081, China
  2. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Physical Chemistry
  Soft Matter and Complex Fluids
  Characterization and Evaluation Materials
  Food Science
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1435-1536
• 卷排序：294

文摘

Superhydrophobic coatings were successfully fabricated by using two silica sols and fluorinated acrylate copolymers through the organic-inorganic hybrid method. The two silica sols contained different nanoparticles, namely, silica nanoparticles with many hydroxyl groups on their surfaces and silica nanoparticles with many long-chain alkyls on their surfaces. The integration of these two silica sols and fluorinated acrylate copolymers satisfied two necessary conditions of multi-scale nano/microstructures and low surface energy for fabricating superhydrophobic coatings. The superhydrophobic surfaces were constructed by using appropriate weight ratios of silica/copolymers and silica sol (methanol) contents. The superhydrophobic coatings displayed a water contact angle as high as 156.2° and contact angle hysteresis of 2.4°, which indicated their good self-cleaning capability. In particular, these coatings showed good mechanical properties and excellent thermal stabilities. The method is not only a facile and inexpensive way to achieve the lotus effect but could also create coatings with high values in practical application. Keywords Superhydrophobic Silica sol Nanocomposites Adhesion strength Thermal stability