木质素添加对基膜及纳滤膜结构和性能的影响  

Effect of lignin addition on the structure and performance of substrate and nanofiltration membrane

作　　者：王乾 朱雪 王绍强 周政忠 呼和涛力 WANG Qian;ZHU Xue;WANG Shaoqiang;ZHOU Zhengzhong;HUHE Taoli(Institute of Urban and Rural Mining,Changzhou University,Changzhou 213164,China;National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学城乡矿山研究院,江苏常州213164 [2]生物质高效炼制及高质化利用国家地方联合工程研究中心(常州大学),江苏常州213164

出　　处：《常州大学学报（自然科学版）》2024年第6期37-43,共7页Journal of Changzhou University：Natural Science Edition

基　　金：常州市应用基础研究计划资助项目(CJ20230034)。

摘　　要：为了打破纳滤膜渗透性能与截留性能之间的权衡效应,通过在基膜中共混生物质材料木质素来调控界面聚合。在界面聚合过程中,基膜中的木质素吸附胺单体并抑制其扩散,从而使得聚酰胺选择层更薄、更致密。相较于传统的纳滤膜,在0.6 MPa下,基膜共混木质素纳滤膜过滤硫酸钠的渗透通量从84.6 L·m^(-2)·h^(-1)提高到139.2 L·m^(-2)·h^(-1),截留率从93.4%提高到96.0%。这不仅能够为高性能纳滤膜的制备提供思路,同时为生物质利用提供新方向。To break the trade-off between the permeability and rejection performance of nanofiltration(NF)membrane,the interfacial polymerization(IP)reaction is regulated by blinding biomass material lignin in the substrates.During the IP process,lignin in the substrate adsorbed amine monomers and inhibits their diffusion rate,resulting in a thinner and denser polyamide selective layer.Compared to traditional NF membranes,the permeability of Na 2SO 4 solution by blending lignin NF membrane increased from 84.6 L·m^(-2)·h^(-1)to 139.2 L·m^(-2)·h^(-1),and the rejection increased from 93.4%to 96.0%.This work not only provides ideas for the preparation of high-performance NF membranes,but also provides solutions for biomass utilization.

关 键 词：纳滤膜 木质素 界面聚合 共混 

分 类 号：TQ051.893[化学工程]