采用聚乙烯吡咯烷酮(PVP)和聚乙二醇(PEG)对聚丙烯腈/聚氨酯(PAN/PU)涂层微孔进行调控。通过扫描电镜分析和水通量截留率测试发现,PVP含量为6%、PEG含量为4%时,平板膜涂层性能最佳。以无纺布作为基底,采用浸轧涂覆的方法将最优参数的铸膜液涂覆在无纺布上,通过化学改性制备胺肟化聚丙烯腈/聚氨酯(AOPAN/PU)复合膜,探究复合膜通量变化和金属离子截留性能。研究表明,改性后制备的AOPAN/PU熔喷复合膜水通量由349L/(m2·h)增长到435L/(m2·h),在对100mg/L的Cu2+、Fe3+、Zn2+混合金属溶液3次吸附循环测试后发现,最终滤液中金属离子截留率均在90%以上。
Polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) were used to regulate the micropores of polyacrylonitrile/polyurethane (PAN/PU) coatings.Through scanning electron microscopy analysis and water flux retention testing,it was found that the performance of the flat film coating was optimal when the PVP content was 6% and the PEG content was 4%.Using non-woven fabric as the substrate,the casting solution with optimal parameters was coated on the non-woven fabric using the dip-coating method,and amine oxime polyacrylonitrile/polyurethane (AOPAN/PU) composite membrane was prepared through chemical modification,exploring the flux changes and metal ion retention performance of the composite membrane.The research showed that the water flux of the AOPAN/PU melt blown composite membrane prepared after modification increased from 349L·m-2·h-1 to 435L·m-2·h-1.After three adsorption cycle tests on 100mg/L Cu2+,Fe3+,and Zn2+ mixed metal solutions,the metal ion retention rate in the final filtrate was above 90%.
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基金资助
安徽省重点研究与开发计划(2022107020006)
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