Design and development of hydrophobic and protective polymer-based spray coatings for treating glass surfaces in building and automotive applications
Pao, Wing Yi
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Glass surfaces in buildings and vehicles are susceptible to two common problems: unrestricted energy transmittance of light-waves resulting in increased HVAC costs, and reduced visibility as a consequence of wetting during precipitation; which is an accident hazard for automobiles. In this context, the surface properties of the glass can be altered and enhanced by deliberately applying hydrophobic and/or protective topical coatings. This research focuses on evaluating the performances of multiple newly-formulated low-cost spray coatings based on polymethylmethacrylate (PMMA) and its blends with various polymers. The experimental comparative characterization study included: transmittance measurement, microstructure visualization, and wettability quantification under static and dynamic conditions. The obtained results indicated that PMMA enhanced the transparency and adhesion to the glass, whereas the addition of secondary polymers reduced wetting and increased blockage of ultraviolet and infrared light-waves. The developed coatings proved their implementation potential for applications where thermal radiation shielding and water repellency are required.