Preparation and application of nano-size dsilicondioxide-polyvinyl alcohol compositeultrafil tration membranes

doi:10.11894/1005-829x.2002.22(5).12

Abstract

Abstract:

The casting solutionis comprised of water as solvent，polyethyl enegly cols(PEG)as additive by adding nanosized sili condioxide(SiO2₂)to a solution of polyvinyl alcohol(PVA).The coagulation bathis a solution of Na₂SO₄/KOH/H₂O.Nano-sized SiO₂-PVA composite membranes are prepared by the phase-inversion process.Experiments show that the porediameter of the resulting membranes is sensitive to pressure.The effects of SiO₂content and PEG content on the performance of the membranes are investigated.Three membranes are indication of excellentanti-fouling characteristics and stability in ultrafiltration experiments of oil-bearing wastewater.

Key words: nano-sized silicondioxide, polyvinylal cohol, ultrafiltration, composite membrane, anti-fouling

摘要：

以水为溶剂，以聚乙二醇(PEG)为致孔剂，并通过向聚乙烯醇(PVA)溶液中添加纳米SiO₂构成铸膜液。凝固浴为Na₂SO₄/KOH/H₂O溶液。采用相转化过程制备纳米SiO₂-PVA复合超滤膜。实验表明，膜孔径对压力是敏感的。考察了SiO₂含量和PEG含量对膜性能的影响。该膜在对含油废水的超滤实验中表现出良好的抗污染性及稳定性。

关键词: 纳米SiO₂, 聚乙烯醇, 超滤, 复合膜, 抗污染性

CLC Number:

TQ028.8

Jiang Yunpeng, Wang Rongshu. Preparation and application of nano-size dsilicondioxide-polyvinyl alcohol compositeultrafil tration membranes[J]. INDUSTRIAL WATER TREATMENT, 2002, 22(5): 12-14.

姜云鹏, 王榕树. 纳米SiO₂-聚乙烯醇复合超滤膜的制备及应用[J]. 工业水处理, 2002, 22(5): 12-14.

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