溶胶-凝胶法制备TiO_2担载超滤膜  

Preparation of Supported TiO_2 Ultrafiltration Membranes by Sol-Gel Technique

作　　者：吴立群[1] 黄培[1] 徐南平[1] 时钩 

机构地区：[1]南京化工大学膜科学技术研究所,南京210009

出　　处：《高校化学工程学报》1999年第3期205-210,共6页Journal of Chemical Engineering of Chinese Universities

基　　金："国家科委"九五"重点科技攻关项目

摘　　要：为制备完整无缺陷的ＴｉＯ２担载超滤膜，本文采用溶胶一凝胶法（Ｓｏｌ－Ｇｅｌ法）的颗粒法制备钛溶胶，考察了制膜液组成、膜厚度以及烧结温度对膜孔结构和性能的影响。结果发现以钛酸丁酯为溶胶前驱物，采用颗粒法，可制备粒径适宜的稳定溶胶。膜的完整性与有机添加剂的量及膜的厚度密切相关，膜的渗透通量和孔径随着烧结温度的升高而增大。本文所制备的氧化钛超滤膜的孔径为１．８－４０ｎｍ，厚度为１．５－２μｍ，纯水渗透性达６．７－８７．０×１０（－１１）ｍ·ｓ（－１）·Ｐａ（－１）。Crack-free supported TiO_2 membranes with ultraporous have been synthesized fromcolloidal titania sols by sol-gel technique. The conditions of casting solution and the sinteringtemperature played important roles on nilcrostfucture of TiO_2 ultrafiltfation membranes. For the samecasting solution, the membrane pore size could be contfolled by the change of sintering temperature. Ifthe thickness of the top layer was at 1 .5-2μm, the range of the pore size was at 1 .8-40urn, and the purewater permeability was at 6.7-87.0x10-11 m. s-1. Pa-1.

关 键 词：二氧化钛 溶胶 凝胶 担载超滤膜 制备 超滤膜 

分 类 号：TQ051.893[化学工程] O658.68[理学—分析化学]