Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (3): 445-449.doi: 10.3969/j.issn.1673-8225.2011.03.016

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Effect of a new anti-reflection, anti-fogging nano-film on surface modification of optical glasses

Li Jian, Liu Jia-yi, Zhang Yang-de   

  1. Hepatobiliary and Enteric Surgery Research Center, Xiangya Hospital, Central South University, Changsha   410008, Hunan Province, China
  • Received:2010-08-12 Revised:2010-09-15 Online:2011-01-15 Published:2011-01-15
  • Contact: Zhang Yang-de, Doctor, Professor, Hepatobiliary and Enteric Surgery Research Center, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, China zyd@2118.cn
  • About author:Li Jian☆, Doctor, Associate professor, Hepatobiliary and Enteric Surgery Research Center, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, China lijian869@126.com
  • Supported by:

    the National High-Tech Research and Development Program of China (863 Project), No. 2007AA021907*

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Abstract:

BACKGROUND: We use the addition polymerization of vinyl double bond to surface modify transparent substrate, and make a new film that has more ideal performances, such as fastened binding force, high hydrophilicity and enhanced transmittance.
OBJECTIVE: To prepare a stable optical anti-fogging coating and high-quality anti-reflective characteristics by surface modification.
METHODS: Anti-reflective and high-hardness Si-O-Si network structure precursor was made by tetraethyl orthoslicate, vinyl triethoxy silane, ethanol, HCl and H2O with the sol-gel method. The nano-film was prepared using addition polymerization theory, by using Si-O-Si as solvent, mixing ammonium acrylate, ammonium methacrylare and ammonium persulfate together, and using 2-hydroxyethyl methacrylate, methyl methacrylate as auxiliary functional groups. The structure was determined by fourier transform infrared spectroscopy and X-ray diffraction, the transmittance was assayed with UV spectrophotometer before and after coating, surface structure was measured by scanning electron microscopy, the particle size, film hardness and water contact angle were measured.
RESULTS AND CONCLUSION: The hydrophilic anti-flogging nano-film not only had Si-O-Si network structure, but also had polymeric hydrophilic groups. The maximum transmittance was 94.6%, which mean a good transmittance of the film. The particle size of nano-film was (265.0±43.8) nm in diameter; the water contact angle was 14.5°, which showed good hydrophilicity. The coating hardness was 6 H, and the binding degree was about 95.1%. The nano-film had -CH = CH2 bond in the Si-O-Si network structure, therefore, it could connect with hydrophilic groups. As soon as the water droplet contacted the surface covered with the nano-film, it would spread over the surface, suggesting that a high transmittance surface would be achieved. Besides high transmittance and hardness, this film had other properties such as antireflection and antifogging. The preparation technology is feasible, and the quality controlling method is simple and reliable.

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