中文摘要：

摘要：将普通纳米SiO2、疏水纳米SiO2、亲水纳米SiO2分别加入到聚偏氟乙烯（PVDF）铸膜液中，通过相转化法制得PVDF／SiO2杂化超滤膜，重点探讨了SiO2加入量及上述三种类型纳米Si02对PVDF杂化超滤膜水通量、截留率和抗污染性能的影响．结果表明：膜的孔隙率、平均孔径、水通量、截留率和抗污染性随SiO2含量增加而先增大后减少；SiO2含量为2％时，膜水通量由大至小为：普通纳米SiO2杂化膜、疏水纳米SiO2杂化膜、亲水纳米SiO2杂化膜，抗污染性由大至小为：亲水纳米Si02杂化膜、普通纳米SiO2杂化膜、疏水纳米SiO2杂化膜．

英文摘要：

The unmodified, hydrophilic and hydrophobic nano-sized SiO2 were added into the PVDF casting solution respectively, and the PVDF/SiO2 hybrid membranes were prepared by phase inversion method. The effects of SiO2 concentration and the above-mentioned three types of SiO2 on the PVDF membrane performances such as pure water flux, rejection ratio, anti-fouling capability were examined. The experimental results indicated that membrane porosity, mean membrane pore size, pure water flux, rejection ration, anti-fouling capability increased with rising SiOz concentration firstly and then decreased. Besides, when the SiO2 concentration was 2~, in terms of pure water flux, unmodified nano-sized SiO2 hybrid membrane was the best, followed by hydrophobic nano-sized SiOz hybrid membrane and hydrophilic nano-sized SiO2 hybrid membrane. Inversely, in terms of anti-fouling capability, hydrophilic nano-sized SiO2 hybrid membrane was the optimal, followed by unmodified nano-sized SiO2 hybrid membrane and hydrophobic nano-sized SiO2 hybrid membrane.