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以钛酸四丁酯为原料,在水/丁醇界面区进行水解,制备了锐钛矿型二氧化钛。将TiO2分别分散在水相(MPD溶液)和油相(TMC溶液)中,以界面聚合方法制备了TiO2/聚酰胺正渗透复合膜,初步研究了TiO2分散在油相和水相中制备的二氧化钛/聚酰胺复合膜的结构及其在正渗透过程中分离性能。SEM图谱结果表明,TiO2添加到水相中时,其主要存在于聚砜基膜的指状孔道中;当TiO2添加到油相中时,其主要分布在复合膜表面。膜分离性能的研究结果表明,TiO2添加在水相和油相中都能显著提高膜的水通量和截盐率;TiO2添加在油相中对膜的分离性能改进更大,膜的水通量为未添加TiO2聚酰胺复合膜的两倍,截盐率可达99.9%。
Tetrabutyl titanate as raw material, hydrolysis in the water / butanol interface area, prepared anatase titanium dioxide. TiO2 was dispersed in the aqueous phase (MPD solution) and the oil phase (TMC solution), respectively, by interfacial polymerization method to prepare TiO2 / polyamide positive infiltration composite membrane, the preliminary study of TiO2 dispersed in oil and water phase prepared titanium dioxide / Polyamide composite membrane structure and its performance in the process of positive osmosis. SEM results showed that when TiO2 was added to the aqueous phase, it mainly existed in the finger channel of polysulfone-based membrane. When TiO2 was added to the oil phase, it was mainly distributed on the surface of the composite membrane. The results of membrane separation performance show that the addition of TiO2 in water phase and oil phase both can significantly improve the membrane water flux and salt rejection; TiO2 added in the oil phase to improve the separation performance of the membrane greater membrane water The amount is not added TiO2 polyamide composite membrane twice, the salt rejection rate of up to 99.9%.