Characterization of a hybrid nano-silica waterborne polyurethane coating for clay bricks

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• 作者：Simonetta Lucia Pagliolico…
• 关键词：Waterborne photo ; cured coatings ; Polyurethanes protective coatings ; Hybrid organic–inorganic coatings ; Nanosilica ; Clay brick
• 刊名：Journal of Coatings Technology and Research
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：13
• 期：2
• 页码：267-276
• 全文大小：1,614 KB
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• 作者单位：Simonetta Lucia Pagliolico (1)
  Elena Daniela Ozzello (1)
  Guido Sassi (1) (2)
  Roberta Bongiovanni (1)
  
  1. Department of Applied Science and Technology, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129, Turin, Italy
  2. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce, 91, 10135, Turin, Italy
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Tribology, Corrosion and Coatings
  Surfaces and Interfaces and Thin Films
  Polymer Sciences
  Materials Science
  
• 出版者：Springer US
• ISSN：1935-3804

文摘

A transparent hybrid organic–inorganic waterborne coating was evaluated for the protection of clay bricks. The nanocomposite film was prepared by combining an environmentally friendly process based on UV-curing of water-based acrylic resins and a mild thermal treatment to form nanosilica in situ from alkoxysilane precursors. Coated and uncoated facing bricks were compared by scanning electron microscopy, surface profilometry, water wettability, and capillary rise tests. The hybrid coatings act as a moderate water repellent; interestingly, no appreciable alteration of the aesthetic properties of the brick was observed, in particular no gloss or color change appeared after the treatment.