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SiO2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SiO2杂化膜、普通纳米SiO2杂化膜、疏水纳米SiO2杂化膜.%The unmodified, hydrophilic and hydrophobic nano-sized SiOz were added into the PVDF casting solution respectively, and the PVDF/SiO2 hybrid membranes were prepared by phase inversion method. The effects of SiC>2 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 SiO2 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 SiO2 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.
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