MSCE  Vol.5 No.5 , May 2017
Improvement of Environmental Stability of the Antireflective Coating by PEG Modified SiO2 Sol
Abstract: As the antireflective coating prepared by sol-gel method had poor environmental stability, sol-modified method was used to improve its performance. The alkaline silica sol was prepared in ethanol solvent by using tetraethyl orthosilicate (TEOS) as precursors and aqueous ammonia as catalyst (content ~ 28%). Polyethylene glycol (PEG200) was used to modify the silica sol and the antireflective (AR) coating was prepared by dip-coating from the modified sol. The transmittance, composition, refractive index, and hydrophobicity of AR coating were discussed by combining the spectrophotometer, FTIR, Coating Wizard 32 coating design software, optical microscopy imaging system and JC2000A static droplet contact angle measurement software. Finally, the environmental stability of the AR coating was tested. The results showed that AR coating transmittance decreased by less than 0.1% after UV light for 20 hours and its transmittance decreased by about 0.57% in the humid environment for 2 months. Resistance to environmental stability has been improved.
Cite this paper: Feng, J. and Huang, J. (2017) Improvement of Environmental Stability of the Antireflective Coating by PEG Modified SiO2 Sol. Journal of Materials Science and Chemical Engineering, 5, 1-8. doi: 10.4236/msce.2017.55001.

[1]   Brinker, C.J. and Scherer, G.W. (2013) Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing. Academic Press, Cambridge, MA.

[2]   Lin, Y. and He, J. (2014) Recent Progress in Antireflection and Self-Cleaning Technology—From Surface Engineering to Functional Surfaces. Progress in Materials Science, 61, 94-143.

[3]   Aegerter, M.A. and Mennig, M. (2013) Sol-Gel Technologies for Glass Producers and Users. Springer Science & Business Media, Berlin.

[4]   Stober, W., Fink, A. and Bohn, E. (1968) Controlled Growth of Monodisperse Silica Spheres in the Micron Size Range. Journal of Colloid and Interface Science, 26, 62-69.

[5]   Wang, X. and Shen, J. (2011) A Review of Contamination-Resistant Antireflective Sol-Gel Coatings. Journal of Sol-Gel Science and Technology, 61, 206-212.

[6]   Shao, J.-D., Dai, Y.-P. and Xu, Q. (2011) Progress on the Optical Materials and Components for the High Power Laser System in China. Proceedings of the SPIE, 8206, Article ID: 820605.

[7]   Yuan, Y., Yan, G., Liu, S., Lu, X. and Hong, R. (2016) Hydrophobic, Ultra-Low Refractive Index Coatings Prepared by Sol-Gel Process. Materials Letters, 184, 305- 307.

[8]   Tao, C., Yan, H., Yuan, X., Yin, Q., Zhu, J., Ni, W., Yan, L. and Zhang, L. (2016) Detailed Analysis and Formation Mechanism of Superhydrophobic Antireflective Coatings with Adjustable Refractive Index from Trimethylsilanized Silica Nanoparticles. Journal of Sol-Gel Science and Technology, 80, 10-18.

[9]   Zhang, Q., Wei, Y., Yang, W., Hui, H., Deng, X., Wang, J., Xu, Q. and Shen, J. (2015) Improvement on Contamination Resistance to Volatile Organics and Moisture of Sol-Gel Silica Antireflective Coating for 351 nm Laser System by Structural Modulation with Fluorinated Compounds. RSC Advances, 5, 4529-4536.

[10]   Zhang, X., Zhuang, M., Miao, X., Su, W., Lin, M., Lin, L., Ye, L., Yan, L., Yang, W. and Jiang, B. (2014) Environment-Resistant Fluoro-Containing Antireflective Coatings for High-Powered Laser Systems. RSC Advances, 4, 48872-48875.

[11]   Zhang, X., Zheng, F., Ye, L., Xiong, P., Yan, L., Yang, W. and Jiang, B. (2014) A One-Pot Sol-Gel Process to Prepare a Superhydrophobic and Environment-Resis- tant Thin Coating from ORMOSIL Nanoparticles. RSC Advances, 4, 9838-9841.

[12]   Sun, J., Zhang, Q., Ding, R., Lv, H., Yan, H., Yuan, X. and Xu, Y. (2014) Contamination-Resistant Silica Antireflective Coating with Closed Ordered Mesopores. Physical Chemistry Chemical Physics, 16, 16684-16693.

[13]   Zhang, Q., Zhou, L., Yang, W., Hui, H., Wang, J. and Xu, Q. (2014) Sol-Gel Preparation of a Silica Antireflective Coating with Enhanced Hydrophobicity and Optical Stability in Vacuum. Chinese Optics Letters, 12, 071601-71604.

[14]   Liu, Y., Shen, J., Zhou, B., Wu, G. and Zhang, Z. (2013) Effect of Hydrophobicity on the Stability of Sol-Gel Silica Coatings in Vacuum and Their Laser Damage Threshold. Journal of Sol-Gel Science and Technology, 68, 81-87.

[15]   Zhang, Y., Zhang, X., Ye, H., Xiao, B., Yan, L. and Jiang, B. (2012) A Simple Route to Prepare Crack-Free Thick Antireflective Silica Coatings with Improved Antireflective Stability. Materials Letters, 69, 86-88.

[16]   Zhang, X.-X., Xia, B.-B., Ye, H.-P., Zhang, Y.-L., Xiao, B., Yan, L.-H., Lv, H.-B. and Jiang, B. (2012) One-Step Sol-Gel Preparation of PDMS-Silica ORMOSILs as Environment-Resistant and Crack-Free Thick Antireflective Coatings. Journal of Materials Chemistry, 22, 13132-13140.

[17]   Zhang, X., Zhang, Y., Ye, H., Xiao, B., Yan, L., Lv, H. and Jiang, B. (2011) Sol-Gel Preparation of Antireflective Coatings at 351 nm with Different Thickness and Improved Moisture-Resistance. Journal of Sol-Gel Science and Technology, 58, 340- 344.

[18]   Xiao, B., Zhang, Y., Zhang, X., Lv, H., Yan, L. and Jiang, B. (2011) Focus on Moisture-Resistance and Hydrophobicity of SiO2 Antireflective Coating Improved by Poly(Isopropylene Oxide) Glycerolether. Journal of Sol-Gel Science and Technology, 60, 11-16.

[19]   Yang, L., Xiang, X., Miao, X., Li, Z., Zhou, G., Yan, Z., Yuan, X., Zheng, W. and Zu, X. (2015) Influence of Outgassing Organic Contamination on the Transmittance and Laser-Induced Damage of SiO2 Sol-Gel Antireflection Coating. Optical Engineering, 54, 126101-126101.

[20]   Sun, J., Zhang, C., Zhang, C., Ding, R. and Xu, Y. (2014) Effect of Post-Treatment on Ordered Mesoporous Silica Antireflective Coating. RSC Advances, 4, 50873- 50881.

[21]   Ellison, M.J., Marshall, K.L., Culakova, Z., Ashe, B., Giacofei, C., Rigatti, A.L., Kessler, T.J., Schmid, A.W., Oliver, J.B. and Kozlov, A. (2007) Vapor-Phase-Deposited Organosilane Coatings as Hardening Agents for High-Peak-Power Laser Optics. Proceedings of the SPIE, 6674, Article ID: 667407.

[22]   Li, X., Gross, M., Oreb, B. and Shen, J. (2012) Increased Laser-Damage Resistance of Sol-Gel Silica Coating by Structure Modification. The Journal of Physical Chemistry C, 116, 18367-18371.

[23]   Li, X. and Shen, J. (2011) A Scratch-Resistant and Hydrophobic Broadband Antireflective Coating by Sol-Gel Method. Thin Solid Coatings, 519, 6236-6240.

[24]   Li, X. and Shen, J. (2011) The Stability of Sol-Gel Silica Coatings in Vacuum with Organic Contaminants. Journal of Sol-Gel Science and Technology, 59, 539-545.

[25]   Tian, H., Zhang, L., Xu, Y., Wu, D., Wu, Z.H., Lv, H. and Yuan, X.D. (2012) Comparison of Silica Anti-Reflective Coatings Obtained via a Sol-Gel Process in the Presence of PEG or PVP. Acta Physico-Chimica Sinica, 28, 1197-1205.