The porous silica optical antireflective coating is prepared by the sol-gel method with the tetraethoxylsilane as the precursor and the ammonia as the catalyst via a dip-coating process. The environment stability of the antireflective coating could be greatly improved by post-grafting 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (FAS-17) and hexamethyldisilazane (HMDS). The properties of the coating are characterized by the UV-VIS spectrometer, the FTIR spectrophotometer, the atomic-force microscopy, the contact angle measurement and the anti-pollution test. The results indicate that for the modified coating, the peak transmittance is up to 99.82%, the surface roughness is only 3.9 nm, and, the contact angle with water is 125°. Especially, the decrease of the transmittance when being tested with water and polydimethylsiloxane pollution in vacuum for two months is as small as 0.03%, suggesting that the coating has an excellent environment stability.
SUN Jinghua
,
DING Ruimin
,
ZHANG Cong
,
ZHANG Ce
,
XU Yao
. Preparation and characterization of porous silica antireflective coating of high environment stability[J]. Science & Technology Review, 2015
, 33(9)
: 31
-34
.
DOI: 10.3981/j.issn.1000-7857.2015.09.004
[1] Stöber W, Fink A, Bohn E. Controlled growth of monodisperse Silica spheres in the micron size range[J]. Journal of Colloid and Interface Science, 1968, 26(1): 62-69.
[2] Vicente G S, Bayón R, Germán N, et al. Surface modification of porous antireflective coatings for solar glass covers[J]. Solar Energy, 2011, 85 (4): 676-680.
[3] Helsch G, Mös A, Deubener J, et al. Thermal resistance of nanoporous antireflective coatings on silica glass for solar tower receivers[J]. Solar Energy Materials & Solar Cells, 2010, 94(12): 2191-2196.
[4] Xu Y, Zhang L, Wu D, et al. Durable sol-gel antireflective coatings with high laser-induced damage thresholds for inertial confinement fusion[J]. Journal of the Optical Society of America B, 2005, 22(9): 905-912.
[5] Matheron M, Bourgeois A, Gacoin T, et al. Mesoporous 3D-hexagonal organosilicate films: Post-synthesis grafting vs. direct synthesis[J]. Thin Solid films, 2006, 495(1): 175-179.
[6] Bhushan B, Cichomski M. Nanotribological characterization of vapor phase deposited fluorosilane self-assembled monolayers deposited on polydimethylsiloxane surfaces for biomedical micro-/nanodevices[J]. Journal of Vacuum Science & Technology A, 2007, 25(4): 1285-1293.
[7] Born M, Wolf E. Principles of optics[M]. Oxford: Pergamon Press, 1983: 87.
[8] Liu Y, Shen J, Zhou B. Effect of hydrophobicity on the stability of solgel silica coatings in vacuum and their laser damage threshold[J]. Journal of Sol-Gel Science and Technology, 2013, 68(1): 81-87.
[9] Faustini M, Nicole L, Boissière C, et al. Hydrophobic, antireflective, selfcleaning, and antifogging sol-gel coating: An example of multifunctional nanostructured materials for photovoltaic cells[J]. Chemistry of Materials, 2010, 22(15): 4406-4413.
[10] 晏良宏, 匙芳廷, 蒋晓东, 等. 疏水疏油二氧化硅增透膜的制备[J]. 无机材料学报, 2007, 22(6): 1247-1250. Yan Lianghong, Shi Fangting, Jiang Xiaodong, et al. Preparation of hydro-oleophobic silica antireflective coating[J]. Journal of Inorganic Materials, 2007, 22(6): 1247-1250.
[11] 张清华, 杨伟, 马红菊, 等. 含氟有机硅改性多孔二氧化硅减反膜[J]. 光学学报, 2009, 6(29): 1719-1723. Zhang Qinghua, Yang Wei, Ma Hongju, et al. Modification of porous silica antireflective coatings with fluorine-containing organosilicon[J]. Acta Optica Sinica, 2009, 6(29): 1719-1723.
