不同金属离子交联的海藻酸盐水凝胶过滤膜性能研究  

Study on the performance of alginate hydrogel filtration membrane crosslinked by different metal ions

作　　者：杨振浩 陈以胜 林泽 洪乙丹 严千语 程乐天 杨婧[1] 郑涵祺 赵孔银[1] YANG ZhenHao;CHEN YiSheng;Lin Ze;HONG YiDan;YAN QianYu;CHENG LeTian;YANG Jing;ZHENG HanQi;ZHAO KongYin(State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin Polytechnic University,Tianjin 300387,China;Characteristic Medical Center of Chinese People’s Armed Police Force,Tianjin 300180,China)

机构地区：[1]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387 [2]天津武警特色医学中心,天津300180

出　　处：《中国科学：技术科学》2024年第8期1577-1585,共9页Scientia Sinica(Technologica)

基　　金：国家自然科学基金(批准号:22078244);中国石化科研开发项目(编号:222443);大学生创新创业训练计划项目(编号:202010058089)资助。

摘　　要：以海藻酸钠(NaAlg)为原料,通过Ca^(2+)、Cu^(2+)、Ba^(2+)和Zn^(2+)水溶液交联Na Alg制备了四种水凝胶过滤膜.通过扫描电子显微镜(SEM),傅里叶红外光谱仪(FT-IR)和热重分析仪(TG)对四种膜进行了表征测试.研究了四种膜的机械性能、在生理盐水中的溶胀性能以及对四种无机盐和五种染料的截留性能.用分子动力学模拟分析了其孔径分布和截留机理.结果表明,海藻酸铜(CuAlg)和海藻酸钡(BaAlg)水凝胶过滤膜具有更好的力学性能、抗溶胀性能和染料/盐分离性能.海藻酸盐水凝胶过滤膜制作方法简单,原料绿色可再生且不使用有机溶剂,在染料脱盐等领域具有良好的应用前景.Four kinds of hydrogel filtration membranes were prepared from sodium alginate(NaAlg)by cross-linking sodium alginate with Ca^(2+),Cu^(2+),Ba^(2+),and Zn^(2+)solutions.The four membranes were characterized by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR),and thermogravimetric analysis(TG).The mechanical properties of the four membranes,the swelling properties in saline and the retention properties of four inorganic salts and five dyes were studied.The pore size distribution and retention mechanism were analyzed by molecular dynamics simulation.The results showed that copper alginate(CuAlg)and barium alginate(BaAlg)hydrogel filtration membranes had better mechanical properties,anti-swelling properties and dye/salt separation properties.The alginate hydrogel filtration membrane has the advantages of simple production method,green and renewable raw materials,and no use organic solvents,and has good application prospects in the fields of dye desalination and other fields.

关 键 词：海藻酸盐 水凝胶过滤膜 染料脱盐 分子动力学模拟 金属离子交联 

分 类 号：TQ051.893[化学工程] TQ427.26