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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。
A new type of reverse micelles method was used to prepare titanium oxide ultrafiltration membrane. Experiment titanate titanate, water, cyclohexane, isoamyl alcohol and surfactant Span-80 as raw material, by controlling the amount of water to prepare three particle size distribution of titanium oxide reverse micelles microemulsion. The TEM images show that the size of the TiO2 reverse micelle increases with the increase of [H2O] / [Span-80] from 13.9 to 55.5. However, when [H2O] / [Span-80] is increased to 110.9, Decrease The results of the BET method are consistent with those of the TEM photographs. It is also shown that the pore size distribution of the unsupported membrane prepared by TiO2 reversed micellar microemulsion [H2O] / [Span-80] is 110.9 is the narrowest and the most probable pore diameter is about 4.5 nm. The most probable pore diameter of the titanium oxide support membrane prepared by using the microemulsion is about 16 nm and the pure water permeability is 1.57 × 10 -4 m 3 (m 2 sMPa) -1; the permeabilities of the N 2 and the H 2 are respectively 4.3 mol ( m2sMPa) -1 and 14.1 mol (m2sMPa) -1, indicating that the resulting TiO2 separation layer is more complete.