溶胶-凝胶法制备磺化聚砜/二氧化钛超滤膜

摘要

In this paper, modified polysulfone was used as a raw material.Different concentration of TiO2 was added into sulfonated polysulfone.Through sol-gel method with TiO2 to organic/inorganic hybrid,TiO2 and sulfonated polysulfone hybrid membrane was produced after a series of treatment.Through the water eontact angle of the membrane, water flux, rejection and mechanical strength tests, it was found that when the TiO2 content below 3％, it helped to improve the hydrophilie membrane and mechanical strength without influencing the retention rate of membranes and increase the flux rate of the membrane.These improvements made the membrane had a very good contamination resistance.But with particle amount increasing, agglomeration would happen which leading to decreasing of the hybrid membrane performance.%采用改性之后的聚砜作为原材料,通过溶胶-凝胶法与二氧化钛进行有机/无机杂化,将不同质量分数的二氧化钛加入磺化聚砜中,经过一系列处理得到磺化聚砜与二氧化钛杂化膜.通过对膜进行水接触角、纯水通量、截留率、机械强度的测试,得出以下结论:当二氧化钛的质量分数在3%以下时,有助于提高复合膜的亲水性和机械强度,在没有影响膜的截留率的同时增加了膜的通量,使得膜具有很好的抗污染能力;随着二氧化钛的不断加入,粒子发生团聚现象,导致杂化膜的性能开始下降.