Durability analysis of Nano Photocatalyst coating on the Building Surface

• Main Authors: Ya-Ti Chen, 陳亞狄
• Other Authors: Chin-Huai Young
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/35jq47

碩士 === 國立臺灣科技大學 === 營建工程系 === 95 === In this research, nano photocatalyst were used on the surface of brick tiles which forms a thin membrane. Furthermore, the brick tiles were placed vertically on the top of the building to test the durability under the influence of the natural factors. The experiment was proceeded in two different settings---indoor and outdoor. In indoor settings, basic properties of initial photocatalyst membrance were explored to differentiate the pollutant ability of decomposition between different products(by using methylene blue to simulate organic pollution), the difference under the change of contacting angle of the water droplet as well. Moreover, UV testing machine was used to imitate the outdoor setting. By doing pollution testing and spraying the methylene blue repeatedly, the decomposed ability of the photocatalyst was under investigation. The result shows that the brick tiles with 15% photocatalyst on the surface are better than the others in durability. Generally, acid resistance of each product is not good in the tests like H2SO4, Na2CO3, and NaCl. In outdoor setting, the relationship between the color difference and the change of contacting angle is not closely related. Some samples even present lower contacting angle before being lightened. In other words, photocatlyst doesn’t definitely lead to the change of contacing angle. Furthermore, the function of decomposition and contacting angle would be discussed separately.