[1]吕永涛,吴浩伟,文剑平,等.rGO/ZIF-8改性聚酰胺纳滤膜的制备及分盐性能[J].中国给水排水,2021,37(5):31-36.
　Lü Yong-tao,WU Hao-wei,WEN Jian-ping,et al.Preparation and Salt Separation Performance of rGO/ZIF-8 Modified Polyamide Nanofiltration Membrane[J].China Water & Wastewater,2021,37(5):31-36.
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rGO/ZIF-8改性聚酰胺纳滤膜的制备及分盐性能

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第37卷 期数: 2021年第5期 页码: 31-36 栏目: 出版日期: 2021-03-01
Title:
Preparation and Salt Separation Performance of rGO/ZIF-8 Modified Polyamide Nanofiltration Membrane
作者:
吕永涛1,2,吴浩伟1,2,文剑平3,张颖4,何龙1,2,王磊1,2
(1.西安建筑科技大学环境与市政工程学院,陕西西安710055;2.陕西省膜分离技术研究院陕西省膜分离重点实验室,陕西西安710055;3.北京碧水源科技股份有限公司,北京102206;4.北京碧水源膜科技有限公司,北京101407)
Author(s):
Lü Yong-tao1,2,WU Hao-wei1,2,WEN Jian-ping3,ZHANG Ying4,HE Long1,2,WANG Lei1,2
(1. School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2. Key Laboratory of Membrane Separation of Shaanxi Province, Research Institute of Membrane Separation Technology of Shaanxi Province, Xi’an 710055, China;3. Beijing Origin Water Technology Co.Ltd., Beijing 102206, China; 4. Beijing Origin Water Membrane Technology Co. Ltd., Beijing 101407, China)
关键词:
纳滤膜改性; rGO/ZIF-8; 分盐性能; 界面聚合; 亲水性
Keywords:
modification of nanofiltration membrane; rGO/ZIF-8; performance of separating salt; interface polymerization; hydrophilic property
摘要:
为了改善纳滤膜的性能，用水热合成法制备了rGO/ZIF-8复合纳米材料，通过界面聚合法引入到纳滤膜的功能层中，制成新型改性聚酰胺复合纳滤膜，并研究了改性膜的表面形貌、结构及分盐性能。结果表明：改性膜的表面出现沟壑状聚酰胺簇突起，粗糙度有较大提升，负电性增强，接触角降至42.7°，亲水性能有所提高。改性膜对Na2SO4的截留率由原状膜的95.8%下降至85.6%，但纯水通量提升近一倍，达到39.2 L/（m2·h），且在连续48 h运行过程中性能稳定。由此可见，新型rGO/ZIF-8材料的引入虽然会导致截留率略有下降，但可以大幅提高改性纳滤膜的水通量。
Abstract:
To improve the performance of nanofiltration membranes, the rGO/ZIF-8 composite nanomaterial was prepared by hydrothermal synthesis, and was introduced into the functional layer of the nanofiltration membrane by the interfacial polymerization method to make a new modified polyamide composite nanofiltration membrane.The surface morphology, structure and salt separation performance of the modified membrane were studied. It was found that gully-like polyamide cluster protrusions appeared on the surface of the modified membrane, the roughness was greatly improved, the negative electrical property was enhanced, the contact angle was reduced to 42.7°, and the hydrophilic property was improved. Using Na2SO4 to investigate the salt separation performance, it was found that the original membrane’s rejection rate decreased from 95.8% to 85.6%, the pure water flux nearly doubled to 39.2 L/(m2·h), and the performance of 48 h continuous operation was stable. The results show that although the introduction of the new rGO/ZIF-8 material will cause a slight decrease in the rejection rate, it can greatly increase the water flux of the modified nanofiltration membrane.
更新日期/Last Update: 2021-03-01