Transparent water repellent silica films by sol-gel process
Transparent water repellent silica films by sol-gel process
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DOI：
10.1016/j.apsusc.2009.12.166
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发表时间：
2010-03-15
影响因子：
6.7
通讯作者：
Gupta, Satish C.
中科院分区：
文献类型：
--
作者：
Dhere, Sunetra L.;Latthe, Sanjay S.;Gupta, Satish C.
近年来，具有高接触角和水滴滑动角的非光滑表面受到了极大的关注。本论文描述了使用异丁基三甲氧基硅烷（iso-BTMS）作为共前体在玻璃基底上的浸涂防水二氧化硅涂层的室温（类似于27 ° C）合成。重点讨论了疏水剂（iso-BTMS）对二氧化硅薄膜疏水性能的影响。通过在整个实验中保持四乙氧基硅烷（TEOS）前体、甲醇（MeOH）溶剂、水（H2O）的摩尔比分别恒定在1：16.53：8.26，用0.01M NH 4F制备二氧化硅溶胶，并且异BTMS/TEOS（M）的摩尔比从0变化到0.965。研究了M对表面结构和疏水性的影响。随着M值从0增加到0.965，二氧化硅膜的静态水接触角值从65度增加到140度，水滑动角值从42度减小到16度。防水二氧化硅膜在高达280 ° C的温度下是热稳定的，并且在该温度以上，膜显示出亲水性行为。通过傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）、原子力显微镜（AFM）、光学透射率、热老化和化学老化试验、湿度试验、静态和动态水接触角测量对疏水二氧化硅薄膜进行了表征。(C)2010年爱思唯尔B。版权所有© 2016
Non-wettable surfaces with high contact angles and facile sliding angle of water droplets have received tremendous attention in recent years. The present paper describes the room temperature (similar to 27 degrees C) synthesis of dip coated water repellent silica coatings on glass substrates using iso-butyltrimethoxysilane (iso-BTMS) as a co-precursor. Emphasis is given to the influence of the hydrophobic reagent (iso-BTMS) on the water repellent properties of the silica films. Silica sol was prepared by keeping the molar ratio of tetraethoxysilane (TEOS) precursor, methanol (MeOH) solvent, water (H2O) constant at 1:16.53:8.26 respectively, with 0.01 M NH4F throughout the experiment and the molar ratio of iso-BTMS/TEOS (M) was varied from 0 to 0.965. The effect of M on the surface structure and hydrophobicity has been researched. The static water contact angle values of the silica films increased from 65 degrees to 140 degrees and water sliding angle values decreased from 42 degrees to 16 degrees with an increase in the M value from 0 to 0.965. The water repellent silica films are thermally stable up to a temperature of 280 degrees C and above this temperature the film shows hydrophilic behavior. The water repellent silica films were characterized by the Fourier Transform Infrared (FT-IR) Spectroscopy, Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), % of optical transmission, thermal and chemical aging tests, humidity tests, static and dynamic water contact angle measurements. (C) 2010 Elsevier B. V. All rights reserved.