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| column | value |
|---|---|
| Name | Fabrication of Hydrophobic Coatings Using the Sol-Gel Method |
| User2 | 臺灣國際科展作品 |
| User3 | 2014 年 |
| User4 | 工程學 |
| User5 | 一等獎 |
| User6 | River Valley High School |
| User7 | |
| User8 | Tan Qin Ye |
| User9 | |
| Detail | The aim of our research is to produce superhydrophobic coatings on both glass and cloth substrates in order to achieve high contact angles and low sliding angles for self-cleaning. In addition, we aim to modify these coatings to be as transparent as possible so as not to interfere with the aesthetics of the objects which will be coated. To achieve this goal, we synthesised a solution using 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (a type of FAS), silica nanoparticles (SiO2), tetraethyl orthosilicate (TEOS), (3-glycidyloxypropyl) trimethoxysilane (Glymo) and deionised water. Using the convenient sol-gel method, coatings of 20% and 30% by weight of FAS-SiO2 nanoparticles were prepared on glass and cotton substrates. It was found that coatings containing 30% by weight of FAS-modified SiO2 nanoparticles on glass slide produced coatings with water contact angle as high as 162.8° and sliding angle as low as 4°. It can also be seen that for glass substrates, the hydrophobicity increased with an increase in percentage of FAS-modified SiO2 nanoparticles. Although the highest percentage transmittance was about 30%, texts and pictures beneath the coated glass slides were clearly readable. The cotton substrates also exhibited excellent hydrophobicity, with a water contact angle of 150° and sliding angle of 22°. Furthermore, the substrates showed good retention of colour and durability after simulated washing and 72 hours of ultraviolet (UV) weathering chamber test. These results show that the effects of washing and UV on the important properties of the cloth were insignificant. |
| User34 | 一等獎 |
| User35 | 新加坡 |
| User38 | 100037.pdf |
| User10 | |
| User11 | |
| User39 | |
| User31(同USER3) | 2014年 |
| User32(同USER4) | 工程學 |
| User37(NAME) |