Polyvinylidene fluoride (PVDF) microporous membranes were prepared by immersion precipitation phase inversion (NIPS).The effects of different nano-silica (nSiO2) content and phosphoric acid (H3PO4) additive on the structure and properties of membranes were investigated.The results shown that H3PO4 and nSiO2 can improve the performance of the membrane.High porosity,average pore size,pure water flux,and membrane flux were obtained after adding H3PO4 and nSiO2 to the casting solution.Under the condition that the amount of nSiO2 was 0.05% (wt,mass fraction) and the amount of H3PO4 was 5% (wt,mass fraction),the performance of the membrane was relatively good,and the porosity of the membrane was 63.4%.The average pore diameter was 0.76μm,the membrane flux was 22kg/(m2·h),and the pure water flux was 70.6L/(m2·h).
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基金资助
国家自然科学基金(21566007,21466008);广西科学研究与技术开发计划课题(桂科能1598025-17)
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