基于纳米SiO_2颗粒的硅酸盐玻璃表面疏水改性的研究  

Hydrophobic modification of silicate glass based on nano-silica particles

作　　者：周旭华 Zhou Xuhua(Department of Chemistry, Zhej iang University, Hangzhou 310027)

机构地区：[1]浙江大学化学系,杭州310027

出　　处：《化工新型材料》2017年第10期181-183,186,共4页New Chemical Materials

基　　金：国家自然科学基金(71102072);中央高校科研基金(2013B07814)

摘　　要：以硅酸盐玻璃为基底,酸性SiO_2溶胶、碱性SiO_2溶胶和3种不同酸碱比例的SiO_2溶胶混合液为浸渍拉膜液,通过提拉镀膜工艺,再经十六烷基三甲氧基硅烷(HDTMS)修饰制备了疏水涂层。研究了酸性SiO_2溶胶、碱性SiO_2溶胶以及酸碱混合SiO_2溶胶对疏水涂层的湿润性、硬度及稳定性的影响,并考察了涂层的表面形貌。结果表明:碱性SiO_2溶胶涂层的疏水性能显著优于酸性SiO_2溶胶涂层,在硬度表现上则相反;且当V酸性∶V碱性=3∶7时,碱性SiO_2颗粒之间能够相互桥接,并粘结在玻璃基底表面,形成良好的结合力和一定的粗糙度结构,使得酸碱混合SiO_2溶胶涂层的疏水性能最佳。此时其接触角为128.2°,硬度≥6H,在自然光下放置35d或流水冲洗5次后仍具有较好的疏水性能,表现出良好的疏水稳定性。The glass sample was immersed in acidic silica sol,alkaline silica sol and different ratios of acid silica sol,respectively.The silicate glass with hydrophobic surface was prepared by dip-coating method and subsequent hydrophobization with hexadecyltrimethoxysilane（HDTMS）.The effect of acidic silica sol,alkaline silica sol and different ratios of acid silica sol on the wettability,hardness and stability of hydrophobic coating were investigated,respectively.In addition,the surface morphology of coating was characterized by field-emission scanning electron microscopy（FE-SEM）.The results showed that the hydrophobic property of alkaline silica sol was better than the acidic silica sol coating,the hardness performance on the contrary.When the acid silica sol ratio of 3∶7,the silica nanoparticles in alkaline silica sol will be linked each other and forming agood combination of strength and a certain roughness structure and therefore made the best hydrophobic performance of coating.In this case,a contact angle of coating was 128.2°,hardness≥6 H.The hydrophobic coating also showed good stability after 35 dplaced under natural light or running water 5 times.

关 键 词：硅酸盐玻璃 疏水改性 接触角 SiO2纳米颗粒 涂层稳定性 

分 类 号：TQ171.1[化学工程—玻璃工业]