Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (5): 499-504.DOI: 10.15541/jim20150490

• Orginal Article • Previous Articles     Next Articles

Preparation of Octyltrimethoxysilane Modified SiO2 Hydrophobic Antireflective Coating

NIU Yan-Yan1, WANG Xiao-Dong2, YAO Lan-Fang1, TIAN Bing-Tao2, FENG Jian-Bin1, CAO Yuan-Yuan2, ZHANG Qing-Hua3, SHEN Jun2   

  1. (1. College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China; 2. Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China; 3. Chengdu Fine Optical Engineering Research Centre, Chengdu 610041, China)
  • Received:2015-10-12 Revised:2015-12-22 Published:2016-05-20 Online:2016-04-25
  • About author:NIU Yan-Yan. E-mail: niuyanyan7365@163.com
  • Supported by:
    Young Scientists Fund of the National Natural Science Foundation of China (11304228).National Natural Science Foundation of China (U1230113).Innovation Foundation of Shanghai Academy of Spaceflight Technology Development Foundation (14CG19).Fundamental Research Funds for the Central Universities

Abstract:

The standard SiO2 sol was prepared by sol-gel process using tetraethylorthosilicate (TEOS) as precursor and ammonia as catalyst. Octyltrimethoxysilane (OTMS) was added into the standard SiO2 sols before and after refluxing to obtain different organosilane modified silica sols, respectively. Silica antireflective (AR) coatings were then prepared from different SiO2 sols by dip-coating method. The optical and structural properties of the AR coatings were characterized by Fourier transform infrared spectroscopy, liquid-state 29Si NMR, UV-Vis-NIR spectrometer, atomic force microscope and water contact angle measurement. The results show that the AR coating prepared from OTMS modified before refluxing has the best moisture-resistant performance. The coated glass substrate obtains a high peak transmittance of 99.7%, with water contact angle of 120°. After been placed in a humid environment for 4 w, the transmittance of SiO2 coatings modified before refluxing is decreased only by 0.23%.

Key words: Sol-Gel, antireflective coating, octyltrimethoxysilane

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