具有界面复合活性层的高效纳滤膜构筑与性能
High-Efficiency Nanofiltration Membrane Construction and Performance with Interfacial Composite Active Layer
邱杰 1孙哲建 2钱杰 2帖金鑫 2詹晓力 3张庆华3
作者信息
- 1. 浙江大学化学工程与生物工程学院,浙江 杭州 310058
- 2. 浙江中烟工业有限责任公司,浙江 杭州 310008
- 3. 浙江大学化学工程与生物工程学院,浙江 杭州 310058;浙江大学东海实验室,浙江 舟山 316000
- 折叠
摘要
纳滤膜技术已广泛应用于水处理过程,但在长期运行过程中仍面临渗透通量下降和污染结垢等问题.本研究在多孔基材上将氨基功能化类沸石咪唑酯骨架-8(AZIF-8)与海藻酸钠(SA)水凝胶网络结合,构筑有机-无机纳米复合活性层高效凝胶网络,制备渗透性强、抗污染性能优异的复合纳滤膜(SAZM).AZIF-8与SA水凝胶结合可以很好地克服纳米材料的团聚与相容性问题.杂化纳米凝胶网络赋予纳滤膜强的亲水性和抗污染性,为水分子的传输提供便捷路径.研究表明,SAZM对二价盐Na2SO4表现出稳定的截留性能,渗透通量从4.1×10-2 L/(m2·h·kPa)增加到 16.3×10-2 L/(m2·h·kPa),提升 297.6%.在牛血清白蛋白污染性实验中,SAZM表现出优异的抗污染性能,通量恢复率达95.1%.
Abstract
Nanofiltration membrane technology has been widely used in water treatment processes,but it still faces problems such as reduced permeation flux and fouling during long-term operation.In this study,the amino functionalized zeolite imidazolium ester framework-8(AZIF-8)was combined with sodium alginate(SA)hydrogel network on a porous substrate to construct an organic-inorganic nanocomposite active layer of high-efficiency gel network to prepare a composite nanofiltration membrane(SAZM)with strong permeability and excellent anti-fouling performance.The combination of AZIF-8 and SA hydrogel could overcome the problems of agglomeration and compatibility of nanomaterials.The hybrid nanogel network imparts nanofiltration membranes with strong hydrophilicity and antifouling properties provided a convenient path for the transport of water molecules.The results showed that SAZM exhibited stable interception performance against the divalent salt Na2SO4,and the permeation flux increased from 4.1×10-2 L/(m2∙h∙kPa)to 16.3×10-2 L/(m2∙h∙kPa),an increase of 297.6%.In the bovine serum albumin contamination experiment,SAZM showed excellent anti-fouling performance,and the flux recovery rate reached 95.1%.
关键词
纳滤膜/纳米复合/水凝胶/抗污染/脱盐Key words
nanofiltration membrane/nanocomposite/hydrogel/anti-fouling/desalination引用本文复制引用
基金项目
国家自然科学基金(21878267)
国家自然科学基金(21978258)
出版年
2024
NETL
NSTL
万方数据