以正硅酸乙酯为前驱体,氨水为催化剂制备标准SiO2溶胶,然后在回流前后分别对普通SiO2溶胶添加适量的辛基三甲氧基硅烷(OTMS)进行修饰,得到OTMS改性SiO2溶胶.用未进行OTMS修饰、回流前修饰和回流后修饰的溶胶分别制备减反膜,并使用傅里叶变换红外光谱仪、核磁共振波谱仪、紫外-可见-近红外分光光度计、原子力显微镜和接触角测试仪对薄膜的结构和性能进行表征.结果表明:回流前添加OTMS修饰剂制备的改性SiO2减反膜具有最优异的耐潮湿环境稳定性能,最高透过率可达99.7％以上;与水的接触角达到120°,在潮湿环境中放置4w后,透过率只下降0.23％.
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