深圳大学学报（理工版）2024，Vol.41Issue(4)：471-479,9.DOI:10.3724/SP.J.1249.2024.04471
基于脂环族酰氯单体制备用于镁锂分离的纳滤膜
Preparation of nanofiltration membranes based on alicyclic chloride monomers for magnesium-lithium separation
摘要
Abstract
Nanofiltration(NF)membranes have great potential for lithium extraction from salt lakes,however,issues like low permeability and low selectivity have impeded further development.This study introduces 1,3,5-cyclohexane tricarbonyl chloride(HTC),an alicyclic chloride monomer with a certain spatial conformation,as the oil-phase monomer for preparing NF membranes via interfacial polymerization(IP)reaction with polyethyleneimine(PEI)as the aqueous-phase monomer.The overall performance of NF membranes is improved by adjusting the internal structure of the separation layer and optimizing the chemical properties of the membrane surface.The research results show that the NF membranes fabricated using HTC as the organic phase monomer exhibit larger pore size and thickness,and superior wettability than traditional NF membranes synthesized with trimethyl chloride(TMC).Moreover,the permeability and magnesium-lithium separation factors are superior to traditional NF membranes.The permeability of the PEI-HTC NF membrane prepared under optimal conditions is 47.30 L/(m2·h·MPa),doubling that of traditional NF membranes.The separation factor of the PEI-HTC NF membrane is 12.37,being 1.61 times that of traditional NF membranes.Under long-term operation,the PEI-HTC NF membrane maintains good selectivity and excellent structural stability,demonstrating great potential for application in lithium extraction from salt lakes.关键词
化学分离工程/膜分离/聚乙烯亚胺/脂环族酰氯/界面聚合/高渗透性能纳滤膜/镁锂分离Key words
chemical separation engineering/membrane separation/polyethyleneimine/alicyclic chloride/interfacial polymerization/nanofiltration membrane with high permeability/magnesium-lithium separation分类
化学化工引用本文复制引用
赵思恒,叶海星,赵盛超,牛青山..基于脂环族酰氯单体制备用于镁锂分离的纳滤膜[J].深圳大学学报（理工版）,2024,41(4):471-479,9.基金项目
National Natural Science Foundation of China(U2006230) （U2006230）
Shenzhen Basic Research Foundation(JCYJ20210324095202008) 国家自然科学基金资助项目(U2006230) （JCYJ20210324095202008）
深圳市基础研究计划资助项目(JCYJ20210324095202008) （JCYJ20210324095202008）
