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采用溶胶-凝胶法制备二氧化硅/PMMA涂层,研究复合涂层对玻璃强度的影响。以正硅酸乙酯和甲基丙烯酸甲酯、γ甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)为原料,制备出SiO_2/PMMA复合溶胶。将有机-无机复合溶胶采用提拉法涂覆在玻璃片上,经120℃热处理2 h制备了复合涂层。采用傅里叶红外光谱仪、原子力显微镜和扫描电镜表征了涂层的结构和形貌,同时采用双环强度测试仪和分光光度计对涂层前后玻璃的性能进行了测试。结果表明溶胶-凝胶法制备的二氧化硅/PMMA复合涂层中,PMMA含量在40%~70%之间时,二氧化硅粒子和PMMA形成了均匀的网络结构,两相相容性良好,形成了纳米级厚度的复合膜:玻璃的断裂强度提高了64.11%~97.85%:涂层后玻璃的透光率均在93%以上,高于末涂层玻璃。
Silica / PMMA coatings were prepared by sol-gel method to study the effect of composite coatings on glass strength. SiO 2 / PMMA composite sol was prepared by using tetraethyl orthosilicate, methyl methacrylate and γ-methacryloxypropyltrimethoxysilane (KH-570) as raw materials. The organic-inorganic composite sol was coated on glass by Czochralski method and the composite coating was prepared by heat treatment at 120 ℃ for 2 h. The structure and morphology of the coatings were characterized by Fourier transform infrared spectroscopy, atomic force microscopy and scanning electron microscopy. The properties of the glass before and after the coating were tested by double ring strength tester and spectrophotometer. The results showed that silica particles and PMMA formed uniform network structure with good PMMA content between 40% and 70% in the silica / PMMA composite coating prepared by sol-gel method , The composite film with nanometer thickness was formed: the breaking strength of glass increased by 64.11% -97.85%: the transmittance of the coating glass was above 93%, higher than that of the final coating glass.