采用溶胶凝胶法，以二甲基二乙氧基硅烷／正硅酸乙酯的复合醇盐为前驱体，制备了一种厚度达到３０μｍ～５００μｍ的大尺寸无载体膜，膜体显示了良好的的可弯曲性和成膜性能，原子力显微镜表征得到的表面平均粗糙度为０．３ｎｍ，色质连用谱的分析表明在醇盐水解聚合过程中形成了大量［（ＣＨ３）２Ｓｉ－Ｏ］ｎ环状分子，填充凝胶孔隙，降低毛细管应力，增加结构柔韧性 A large size carrier-free membrane with a thickness of 30μm ~ 500μm was prepared by the sol-gel method and the complex alkoxide of dimethyldiethoxysilane / tetraethylorthosilicate was used as a precursor. The membrane showed good The surface roughness averaged by atomic force microscopy was 0.3 nm. The analysis of the color spectrum showed that a large amount of [(CH3) 2Si-O] n was formed during the alkoxide hydrolysis polymerization Cyclic molecules, filling gel pores, reduce capillary stress and increase structural flexibility