聚乙烯醇/二氧化硅复合增透膜的制备和可清除性
Preparation and removability of PVA/SiO2 composite antireflective coating
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摘要: 用溶胶-凝胶法制备了易清洗的聚乙烯醇/二氧化硅(PVA/SiO2)复合增透膜。先在K9玻璃基片上镀制PVA薄膜，然后在PVA薄膜上镀上二氧化硅增透膜。用紫外可见光分光光度计、椭偏仪、光学显微镜、扫描探针显微镜和静滴接触角测量仪分别分析了膜层和基片的透射率、膜层厚度和折射率、表面形貌、水接触角等性质，用去离子水作溶剂对复合膜层进行清洗。结果表明：聚乙烯醇/二氧化硅复合增透膜峰值透射率达到99.8％，峰值透射率位置可以随SiO2厚度而调节。复合膜层能够被热水清除，清除后基片完好，其透射率、表面形貌和水接触角与镀膜前一致。Abstract: PVA/SiO2 composite antireflective coatings which can be easily removed from glass substrate by hot water were prepared. PVA coatings were first deposited onto K9 glass substrate, followed by SiO2 as the second layer. UV-Vis spectrophotometer, ellipsometer optical microscope, scanning probe microscope, and contact angle measuring system were used to characterize the properties of the composite coatings and substrates. The results show that the peak transmittance of PVA/SiO2 composite coatings is 99.8%, and its position could be adjusted with the thickness change of SiO2 layer. After removal of the composite coatings in hotwater, the substrates are not damaged, and the basic properties, such as transmittance, surface morphology and water contact angle, remain the same as those of the substr
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Key words:
- sol-gel /
- polyvinyl alcohol /
- silica /
- antireflective coating /
- removability
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