【摘要】 利用溶胶-凝胶法制备了乙烯基倍半硅氧烷(VS)和TEOS改性的乙烯基倍半硅氧烷(VST),以VS和VST为中间体,制备了杂化膜材料m VS和m VST,用红外光谱、扫描探针电镜对杂化材料进行了表征,并通过紫外-可见-近红外分光光度计研究了VS和VST膜材料的光学性能.结果表明:m VS在波长200～300nm的紫外吸收最大,在400～700nm涂膜玻璃片的透光率可提高到90%以上,TEOS质量分数为20%时,杂化膜的增透作用最大,可用于日光温室的透光材料.更多还原

【Abstract】 Vinyl-silsesquioxanes(VS) derived from hydrolytic condensation of vinyltrimethoxysilane (VMS) and modified with tetraethoxysilane (TEOS) (VST) were prepared by the sol-gel process. The ormosil thin films based on VS and VST (m-VS and m-VST) were coated on glass by the dip-coating method. The VS structural characteristics were identified by Fourier transform infrared (FTIR). The morphology of the film was characterized with a scanning probe microscope (SPM). The optical properties were characterized and studied with a UV-VIS-NIR Scanning Spectrophotometer (SSP). The m-VS film showed the largest UVR absorbs among the ormosil thin films. The average transmittance of the coatings within 400～700 nm band can be increased up to more than 90%. The effects of TEOS contents on the film optical properties and their applications in agriculture were discussed. The hybrid film with 20% TEOS fraction had the optimum antireflectivity, and can be used as antireflective coating in the sun-beam gathering of the green house.更多还原