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Title: Oleophilic and Oleophobic coatings for building applications
Keywords: Building
Building Performance and Sustainability
Shah Kwok Wei
2017/2018 PFM
Functional Group
Oil Contact Angle
Issue Date: 22-Jun-2018
Citation: TAN ZHI KWANG VERNON (2018-06-22). Oleophilic and Oleophobic coatings for building applications. ScholarBank@NUS Repository.
Abstract: The use of nanocoatings for various applications are becoming increasingly widespread due to their multi-functionality. One particular type of nanocoating that is gaining a lot of popularity is oleophobic nanocoatings. An important use of oleophobic nanocoatings is on facades and walls. Oleophobicity is one of the key factors in producing ‘self-cleaning’ coatings which have a lot of potential in saving labour costs, energy, and water. Oleophilicity, on the other hand, has great potential in the field of oil separation and oil removal. Due to the variety of different types of materials, this research hopes to identify the type of materials with the best performance in terms of oleophobicity. In this study, 26 different silane, polymeric, and nanoparticle-based materials are tested for their oleophobicity by coating these materials on a glass substrate and measuring their Oil Contact Angles (OCAs). The aim of this research is to create a comprehensive list of OCAs of various materials as a foundation to a database repository comprising of silanes, polymers and nanoparticles. Also, the study hopes to uncover the role of functional groups in determining a material’s oleophobicity. We discovered 3 high performance oleophobic nanocoatings and 4 high performance oleophilic nanocoatings by benchmarking and ranking. We also successfully fabricated dry and hard coatings using the drop-coating technique and drying through thermal and ambient curing. After a thorough analysis of the results, we discovered that the presence of certain functional groups affects a material’s oleophobicity. The number of such groups and the orientation of the groups affect the chemical structure of the material and subsequently affects the way the coated surface interacts with an oil droplet. With the 26 results obtained, this study serves to be a foundation on which a more comprehensive database repository can be built upon.
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