槲皮素-聚多巴胺共沉积制备复合纳滤膜及其染料脱盐性能  

Nanofiltration membranes prepared by co-deposition of quercetin-polydopamine for dye desalination performance

作　　者：姚铮 金腾 董亮亮 张春芳 白云翔 YAO Zheng;J IN Teng;DONG Liangliang;ZHANG Chunfang;BAI Yunxiang(Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Materials Engineering,Jiangnan University,Wuxi 214122,China)

机构地区：[1]江南大学合成与生物胶体教育部重点实验室,化学与材料工程学院,无锡214122

出　　处：《膜科学与技术》2022年第5期122-128,138,共8页Membrane Science and Technology

基　　金：国家自然科学基金面上项目(22075107)。

摘　　要：采用液相共沉积法制备了以槲皮素-聚多巴胺(PDA)为分离层的复合纳滤膜,考察了沉积液中多巴胺与槲皮素的质量比对活性分离层表面性质和染料脱盐性能的影响.结果表明,槲皮素和多巴胺共沉积有效抑制了PDA聚集颗粒的形成,赋予膜表面更好的均匀性;同时槲皮素的引入使分离层结构更为疏松,显著提高了复合纳滤膜的透水性能,且染料截留率始终保持在92%以上.当多巴胺与槲皮素的质量比为1:1时,复合纳滤膜的纯水渗透率高达1795L/(m^(2)·h·MPa),刚果红截留率为99.6%,刚果红/NaCl选择性达到了58.7,具有优异的染料脱盐性能和长期运行稳定性.Composite nanofiltration membranes were prepared by liquid phase co-deposition of quercetin anddopamine method. The effect of the dosge ratio of dopamine to quercetin on the surface properties of membrane active separation layer and the desalinization performance of dye were investigated. The results showed that the co-deposition of quercetin effectively inhibited the formation of polydopamine aggregates and endowed the membrane surface with better uniformity. Meanwhile, the introduction of quercetin made the structure of separation layer much looser, and significantly improved the permeability of the composite nanofiltration membranes, and the dye rejection rate was always above 92%. When the dosge ratio of dopamine to quercetin was 1∶1, the pure water permeability of the composite nanofiltration membrane was up to 1 795 L/(m^(2)·h·MPa), the interception of the Congo red was 99.6%, and the selectivity of the Congo red/NaCl reached 58.7. The membranes also showed excellent long-term operation stability.

关 键 词：槲皮素 聚多巴胺 复合纳滤膜 共沉积 染料脱盐 

分 类 号：TQ028.8[化学工程]