海藻酸钙水凝胶过滤膜的制备及其对硫酸钙的截留  

Synthesis and calcium sulfate retention of calcium alginate hydrogel filtration membrane

作　　者：郑海燕[1,2] 马敬环[1,2] 赵孔银[1,3] 黄海滨[1,2] 刘莹[1,2] 魏俊富[1,2] 张新新[1,3] 

机构地区：[1]中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300387 [2]天津工业大学环境科学与化学工程学院,天津300387 [3]天津工业大学材料科学与工程学院,天津300387

出　　处：《功能材料》2015年第4期4144-4147,4152,共5页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2013AA065601);国家自然科学基金资助项目(51103102);博士点新教师基金资助项目(20111201120004);天津市科技支撑计划重点资助项目(13ZDSF00100)

摘　　要：以尿素为致孔剂制备了海藻酸钙(CA)水凝胶过滤膜,测试了其通量、截留率和力学性能;通过扫描电子显微镜(SEM)观测其过滤硫酸钙前后的表面形貌。结果表明,增加尿素含量,均导致膜应力和应变的下降;而膜的纯水通量则迅速增大,尿素含量为3.0%(质量分数)时达到28.7 L/(m2·h),为最大;0.2 MPa下,过滤1.7 g/L硫酸钙时对Ca2+和SO2-4的截留率分别为83%和92%,稳定通量达到21.7 L/(m2·h)。In this thesis,urea was used as a porogen to prepare calcium alginate （CA）hydrogel filtration mem-brane.The flux,retention and mechanical properties of the CA filtration membrane were tested.The surface morphology of CA filtration membrane before and after filtrating calcium sulphate was observed by scanning e-lectron microscopy （SEM）.Results showed that the stress and strain of the membrane reduced with the increase of urea content.When the concentration of urea was less than 2.5wt%,the water flux of membrane increased rapidly with the increase of urea content.When the urea was 3.0wt%,the flux reached 28.7 L/（m^2 ·h）.With the continue increase of the urea amount the flux increased little.When the pressure was fixed at 0.2 MPa,the retention rate of Ca2 ＋ and SO 2 -4 for the CA filtration membrane was 83% and 92%,respectively.And the stable flux reached 21.7 L/（m^2 ·h）.

关 键 词：纳滤 海藻酸钙 尿素 硫酸钙 通量 截留 

分 类 号：TQ028[化学工程]