TiO2改性层厚度对PVDF-TiO2改性膜性能的影响研究
陈莹蕾;任月萍;李秀芬;王新华
【期刊名称】《膜科学与技术》 【年(卷),期】2018(038)001
【摘要】Titanium dioxide (TiO2) nanoparticles exhibit many merits,like hydrophilic,non-toxic,photocatalytic active,cost effective,etc,so they are widely
used
in
polyvinylidene
fluoride
(PVDF)
membrane
modification.Actually,a large proportion of TiO2 nanopartices were imbedded in the macroporous support layer of the PVDF-TiO2 membrane and they cannot fully played their role on enhancing the hydrophilcity and anti-pollution performance of the PVDF-TiO2 membrane.In this paper,PVDF -TiO2 with different TiO2 modified layer thichkness have been prepared through stepwise knifing.Experiments have revealed that the TiO2 dosage of the M50 membrane only accounts for 20％ of the regular PVDF-TiO2 modified membrane M250 while its pure water flux achieved 90％ of the regular PVDF-TiO2 modified membrane.The flux recovery rate (FRR) of the M50 after filtering BSA solution and mimetic sewage reached at 99％ and 100％ of the M250 respectively.A novel strategy to further decrease the cost of PVDF modified membranes is provided.%TiO2纳米颗粒具有亲水、无毒、光催化活性和廉价易得等优点,在PVDF改性膜制备方面应用广泛.通过常规共混法制备的PVDF-TiO2改性膜,大部分TiO2颗粒被掺杂于较厚的大孔支撑层中,
TiO2改性层厚度对PVDF-TiO2改性膜性能的影响研究
