膜科学与技术

SiO2-TiO2亲水薄膜的制备及热处理对其亲水性能的影响

作者：吕德涛¹，郭宪英²

单位： 1.中国电子科技集团第三十三研究所，太原030006；2.青岛大学化学化工与环境学院，青岛266071

关键词：溶胶凝胶法; SiO2-TiO2; 亲水; 薄膜; 烧结

出版年,卷(期):页码： 2010,30(6):0-0

摘要：

摘要为了制备在自然光下具有良好的亲水性能的SiO2-TiO2薄膜，实验用溶胶凝胶法以正硅酸乙酯（TEOS)和钛酸丁酯(TBOT)为前驱体水解制备SiO2-TiO2溶胶；采用浸渍提拉法在普通载玻片上涂膜；然后分别运用微波炉和马弗炉两种不同的烧结方式进行热处理制得产品。将所得产品分别进行接触角、紫外-可见分光光度计、IR、XRD、SEM测试。结果表明：马弗炉烧结得到的SiO2-TiO2薄膜亲水性要好于微波炉烧结，并且在VTEOS：VTBOT=0.75时，接触角最小，可达到4.3°，在自然光照15秒后，水滴可以在薄膜表面完全铺展开，达到0°，满足防污自清洁的要求；马弗炉和微波炉烧结的产品的红外谱图说明有Ti-O-Si键的生成，证明SiO2和TiO2之间生成了复合氧化物，但相比于马弗炉，微波炉所制产品的亲水基团在烧结过程中可能遭到破环。

Abstract：In order to prepare the SiO2-TiO2 film of excellent photoinduction superhydrophilicity, we prepared SiO2-TiO2 sol using butyl titanate and tetraethyl orthosilicate as premedicant by sol-gel method under ultrasonography condition, SiO2-TiO2 films were prepared on common glass substrates with dip-coating technique, we got the end-products after different heat-treatment methods using microwave oven and muffle furnace. Finally the behaviour of these films were checked by contact angle testing, ultraviolet-visible spectrophotometer, IR，XRD and SEM. Our results suggest that thehydrophilicity of SiO2-TiO2 films heated by muffle furnace is better than that by microwave oven。 When the volume ratio of TEOS and TBOT is 0.75, the contact angle is minimum and comes up to 4.3°, which is sufficient to satisfy the requirement of anti-pollution and self-cleaning; the appearance of Ti-O-Si in infrared spectrogram suggest that a new composite oxide is formed between SiO2 and TiO2，but compared to muffle furnace, the hydrophilic group of SiO2-TiO2 films prepared by microwave oven is destroyed during heating.

吕德涛，山东蓬莱人，1984年出生，男，青岛大学材料学硕士，现任中国电子科技集团第三十三研究所研究员，主要研究TiO2溶胶动力学和TiO2薄膜的各种制备方法。

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