超親水複合薄膜之製備及其表面特性分析;Fabrication of superhydrophilic hybrid thin film and analysis of its surface character

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题名:	超親水複合薄膜之製備及其表面特性分析;Fabrication of superhydrophilic hybrid thin film and analysis of its surface character
作者:	張雅真;Chang,Ya-chen
贡献者:	光電科學與工程學系
关键词:	超親水;薄膜;表面特性;Superhydrophilic;Thin film;Surface character
日期:	2015-08-27
上传时间:	2015-09-23 11:31:10 (UTC+8)
出版者:	國立中央大學
摘要:	超親水複合薄膜(TiO2+SiO2)可簡單的利用溶膠-凝膠法製備，由二氧化鈦奈米顆粒混合溶膠-凝膠法製備出的二氧化矽而製得。整體膜層架構為一個雙層結構，分別為TiO2+SiO2/AR coating/glass以及TiO2+SiO2/SiO2/glass。透過兩種不同中間層抗反射膜層(AR Coating)或二氧化矽薄膜(SiO2)提高整體膜層之穿透率。抗反射膜層之添加可使整體膜層在可見光波段(400-700 nm)的平均穿透率達到94.3%，而二氧化矽薄膜則可使穿透提升至91.4%。超親水複合薄膜的水滴接觸角在照UV光(253.7 nm, 4 mW/cm2)4小時後具有接觸角小於10°之超親水特性，且將薄膜置於暗房內其超親水特性可維持76小時。機械性質方面，附著力測試根據ISO 2409標準下其品質等級為1，也就是薄膜整體的剝落程度<5%；薄膜進行鉛筆硬度測試，在3H鉛筆刻劃下無任何刮痕，可達到3H的鉛筆硬度；而對於耐磨耗測試，可耐磨大於1280次。在環境測試部分，將超親水複合薄膜放置在不同溫度、濕度及時間，如高溫高濕試驗85℃、85%RH 100小時和高溫耐久性測試100℃, 168 h，考驗其抵抗能力，結果顯示薄膜皆無脫膜、裂膜現象，且照UV光之後超親水複合薄膜仍顯示具有超親水現象，因此對環境具有良好的抵抗能力。 ;Sol-gel process is an easy method for fabricating a superhydrophilic hybrid thin film. A two-layer structure, TiO2+SiO2/AR coating/glass and TiO2+SiO2/SiO2/glass, was designed and fabricated. The transmittance of superhydrophilic hybrid thin film was increased by inserting AR coating or SiO2 film between TiO2+SiO2 and glass. The transmittance of TiO2+SiO2/AR coating/glass and TiO2+SiO2/SiO2/glass was 94.3% and 91.4%, respectively. The water contact angle (WCA) of the TiO2+SiO2 superhydrophilic hybrid thin film was less than 10° following treatment with ultraviolet irradiation (253.7 nm, 4 mW/cm2). The superhydrophilic hybrid thin film exhibited lasting superhydrophilicity when stored in a dark place (opaque acrylic box). After 76 h of storage in a dark place, the superhydrophilic hybrid thin film exhibited a significantly lower WCA. To ensure that the durable TiO2+SiO2 superhydrophilic hybrid thin film, its mechanical properties were measured. The hardness of the superhydrophilic hybrid thin film was obtained (≥ 3 H) by performing the pencil hardness test. According to the ISO 2409 standard, the adhesion of a superhydrophilic hybrid thin film causes it to be given a quality rank of 1. The superhydrophilic property was be maintained after the thin film was treated by pressing steel wool under a 500 g weight and moving it parallel to the substrate, back and forth on it more than 1280 times. The phenomenon of thin film cracking and stripping was not observed under 100 ℃ (168 h) and 85 %RH (100 h).
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