反胶团法制备氧化钛超滤膜的研究  

Studies on Preparation of Ultrafiltration Titania Membrane by Reversed Micelle Method

作　　者：琚行松[1] 黄培[1] 徐南平[1] 时钧[1] 

机构地区：[1]南京化工大学膜科学技术研究所,江苏南京210009

出　　处：《高校化学工程学报》2002年第2期119-124,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家"九五"重点科技攻关项目(96-A13-01-04)。

摘　　要：采用新型的反胶团法制备了氧化钛超滤膜。实验以钛酸丁脂、水、环己烷、异戊醇及表面活性剂Span-80等为原料,通过控制水量制得三种粒径分布的氧化钛反胶团微乳液。TEM照片表明,TiO2反胶团粒子随着[H2O]/[Span-80]由13.9增加到55.5而增大,但当[H2O]/[Span-80]增加到110.9时TiO2反胶团粒子反而减小。BET法结果与TEM照片一致,而且表明[H2O]/[Span-80]为110.9的TiO2反胶团微乳液所制得的无支撑膜孔径分布最窄、最可几孔径约为4.5nm。采用该种微乳液所制得的氧化钛支撑膜的最可几孔径约为16nm, 纯水渗透率为1.57×10-4m3(m2sMPa)-1;常温下N2、H2渗透率分别为4.3mol (m2sMPa)-1和14.1mol(m2sMPa)-1,表明所得TiO2分离层较完整。Reversed micelle method was used to prepare titania ultrafiltration membranes. Firstly, three reversed micelle of different sizes of titania particles were prepared by using tetrabutyl titanate, water and cyclohexane, and Span-80 as a surfactant, iso-pentanol as an accessory surfactant. TEM photographs show that the size of titania reversed micelle increases with the increasing of [H2O]/[Span-80] from 13.9 to 55.5 and decreases with [H2O]/[Span-80] from 55.5 to 110.9. Pore size distributions of unsupported titania membranes agree with the TEM photographs, and show that the unsupported membrane prepared from the micelle with [H2O]/[Span-80] of 110.9 has an average pore size of about 4.5nm and its pore size distribution is the narrowest. Thus the micelle with [H2O]/[Span-80] of 110.9 was used to prepare supported titania membrane. The titania membrane prepared has a most propable pore size of 16nm by liquid-liquid displacement method and its pure water permeability is 1.57×10-4m3(m2sMPa)-1. The gas permeability of N2 and H2 are 4.3mol(m2sMPa)-1 and 14.1mol(m2sMPa)-1 respectively at normal temperature. The above results show that the titania membrane is defect-free.

关 键 词：反胶团 氧化钛 超滤膜 

分 类 号：TQ028.8[化学工程] O648.22[理学—物理化学]