纸质复合超滤膜的研究与开发

Preparation and Characteristics of a Paper-based Ultrafiltration Membrane

以定量50 g/m2的纸张(浆料打浆度为80°SR)为基膜(多孔支撑层),聚乙烯醇(PVA,质量分数0.5%)为成膜液,戊二醛(质量分数1%)为交联剂,在交联时间5 min、交联温度60℃、干燥温度20℃的条件下,利用造纸涂布工艺开发了一种纸质复合超滤膜。通过扫描电镜分析可知,纸质复合超滤膜孔径约为30～100 nm,达到超滤水平。纸质复合超滤膜的机械强度和抗污性能良好,且耐高温和耐碱。

A novel paper-based ultrafiltration（UF） composite membrane was developed via paper coating technology.This composite membrane was obtained by coating PVA with glutaraldehyde as crosslinking agent on the surface of the paper sheet which was employed as the support layer.The paper sheet with a base weight of 50 g/m2 was used in this study,and the paper sheet was prepared using the furnish with 80°SR beating degree.The resulting membrane performed with satisfied results when the concentrations of PVA and glutaraldehyde were 0.5% and 1.0%,the crosslinking reaction was conducted at 60℃ for 5 min,and the sample was dried at 20℃,respectively.The results showed that the diameters of the pore of the membrane are 30~100 nm,and the membrane has the properties of high retention performance,good mechanical strength,temperature alkali resistant properties and antifouling ability.