摘要
海藻酸钠经二价钙离子改性后作为阳膜层,用戊二醛改性壳聚糖制备了阴膜溶胶,将阴膜溶胶流延于阳膜层上,制备了Ca2+-SA/戊二醛-CS双极膜m(SA-CS)BPM。测定了双极膜的红外光谱、热重分析和机械性能。将m(SA-CS)BPM应用于从盐湖卤水提取锂,二价离子的透过率均小于2%,而一价离子的透过率均大于20%。表明该双极膜能够有效分离卤水中的一价、二价金属离子。
mSA-CS bipolar membrane was prepared by sodium alginate（SA） and chitosan（CS）,which were modified by Ca2＋ and glutaraldehyde（GA） as linking reagents,respectively.The m（SA-CS） membrane was characterized by FTIR,TG and mechanism performance.The results showed that m（SA-CS） BPM was applied in lithium extraction from salt lake.It was well selectively to separate monovalent and divalent ions.The penetration of ions through m（SA-CS） bipolar membrane for divalent Ion was 1%,but for monovalent ion was 20%.
出处
《广州化工》
CAS
2011年第5期59-61,133,共4页
GuangZhou Chemical Industry
基金
福建省教育厅资助项目(No:JA10074
JB09052)
关键词
双极膜
海藻酸钠
壳聚糖
一价、二价离子的分离
bipolar membrane
sodium alginate
chitosan
separation of monovalent and divalent ions
