从海水中选择性提钾的双极膜的研制及其应用  

Preparation and application of bipolar membrane of selective extracting potassium from seawater

作　　者：肖艳春[1,2] 黄婧[1] 陈彪[1] 刘明华[3] 

机构地区：[1]福建省农业科学院农业工程技术研究所,福州350003 [2]福州大学石油化工学院,福州350002 [3]福州大学环境与资源学院,福州350002

出　　处：《膜科学与技术》2015年第3期85-91,共7页Membrane Science and Technology

基　　金：福建省省属公益类优势领域项目(2014R1015-13);2014年度农科院院青年科技创新项目(2014CX-14;2014CX-13)

摘　　要：以羧甲基纤维素钠(CMC)和壳聚糖(CS)分别作为制备双极膜阳、阴极膜的天然材料,然后分别以18-冠醚-6(18-C-6)和戊二醛(GA)改性,采用流涎法制备mCMC+18-C-6/mCS离子印迹双极膜.从含水率、红外、热稳定性、跨膜电压、交流阻抗等方面表征该离子印迹双极膜的性能.测定结果表明,改性后的离子印迹双极膜性能得到提高.并将改性后的离子印迹双极膜应用于宁德市海水中提取钾资源,当渗透时间150min时,K+透过改性后的离子印迹双极膜的透过率最大,高达95%.Sodium carboxymethyl cellulose （CMC） and chitosan （CS） were prepared as natural materials, then modified by 18- crown- 6 - （18 - C- 6） and glutaraldehyde （GA）, respectively, mCMC＋ 18 - C- 6/mCS ion imprinted bipolar membrane（ IIBPM） was prepared by a paste method. The IIBPM was characterized by moisture content,infrared spectroscopy （IR）, transmembrane voltage, AC impedance, thermal stability, respectively. The results showed that the property of IIBPM was improved after modified by 18 - C- 6. mCMC＋ 18 - C- 6/mCS IIBPM was applied to extract potassium resources from the seawater near Ningde city. When the penetration time was 150 rain, the permeability rate of K^＋ through the rnCMC＋ 18- C- 6/mCS IIBPM was up to 95 %.

关 键 词：18-冠醚-6 离子印迹双极膜 制备 表征 应用 

分 类 号：TQ028.8[化学工程] TQ131.13