The study on the self-cleaning property of hydrophobic polydimethylsiloxane/nano-CaCO3 coating

Amirul Syafiq Abdul Jaafar
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Abstract

Dust depositions always degrade the building’s value due to the growth of mold and fungi. Manual cleaning is required to clean the building glass frequently which is time-consuming and costly. Self-cleaning coating is an effective and practical way to reduce dust accumulation. Using the sol-gel method, this study synthesized the self-cleaning polydimethylsiloxane (PDMS)/nano-calcium carbonate (CaCO3) coating. The coating recorded the water contact angle (WCA) of 99.5° ± 0.5°, indicating the hydrophobic property. The embedded nanoparticles create air pockets that reduce the adhesion between water droplets and glass surface. The hydrophobic coated glass showed the self-cleaning effect where the coating achieves a low dust haze of about 32% at the sliding angle 25°. The water contact angle (WCA) of the coating system degrades to 98.2° ± 1.2°, indicating the coated glass can maintain its hydrophobic property in the real environment after 1 month of outdoor exposure. In comparison, the bare glass showed large dust haze value above 50% due to the dust accumulation impact.
疏水性聚二甲基硅氧烷/纳米 CaCO3 涂层的自清洁性能研究
由于霉菌和真菌的生长,灰尘沉积总是会降低建筑物的价值。建筑玻璃需要经常进行人工清洁,耗时长,成本高。自洁涂层是一种有效而实用的减少粉尘堆积的方法。本研究采用溶胶-凝胶法合成了自清洁聚二甲基硅氧烷(PDMS)/纳米碳酸钙(CaCO3)涂层。涂层的水接触角(WCA)为99.5°±0.5°,表明涂层具有疏水性。嵌入的纳米颗粒会产生气穴,减少水滴和玻璃表面之间的粘附。疏水镀膜玻璃具有自清洁效果,在25°滑动角处镀膜达到32%左右的低粉尘雾度。涂层系统的水接触角(WCA)降至98.2°±1.2°,表明涂层玻璃在室外暴露1个月后,在真实环境中仍能保持疏水性。相比之下,裸玻璃由于粉尘积聚的影响,显示出50%以上的较大粉尘雾霾值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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