聚醚砜/壳聚糖共混耐污染超滤膜的研制  

Study of Antifouling Polyethersulfone/chitosan Ultrafiltration Membrane

作　　者：郭诗琪[1] 王秀菊[1] 祝加琛[1] 王爱民 王立国[1,3] 

机构地区：[1]济南大学资源与环境学院,山东济南250022 [2]山东招金膜天有限责任公司,山东招远265400 [3]山东大学环境科学与工程学院,山东济南250100

出　　处：《山东化工》2012年第11期1-4,共4页Shandong Chemical Industry

基　　金：国家自然科学基金(21006100);山东省科技发展计划(2012GGB01157);山东省自然科学基金(ZR2011BL009);山东省高等学校科研计划(J11LB51)

摘　　要：采用相转化法,以聚醚砜(PES)、壳聚糖、聚乙二醇400(PEG400)、吐温80和LiCl/N,N-二甲基乙酰胺(DMAc)混合溶剂为原料制备聚醚砜/壳聚糖共混耐污染超滤膜,并对影响超滤膜结构和性能的各个因素进行了研究。结果表明,在壳聚糖质量分数为0.3%、反应温度为80℃条件下制备的聚醚砜/壳聚糖共混耐污染超滤膜性能最优。在25℃、0.1MPa操作条件下,膜的纯水通量为745.22(L/㎡.h),牛血清白蛋白截留率为91.79%。改性后的超滤膜表面接触角为74.6°,阻力增大系数为0.54,通量衰减速度小于未改性超滤膜,亲水性能和耐污染性能得到很大提高。The antifouling polyethersulfone/chitosan ultrafiltration membrane was prepared by liquid- solid phase inversion method using polyethersulfone （PES）, ehitosan, polyethylene glycol 400 （ PECA00）, Tween 80 and mixed solvent of LiCL/N, N - dimethylacetamide as materials, and the various factors which influenced the structure and performance of ultrafiltration membrane was studied. The results show that, when chitosan mass fraction is 0.3% and the reaction temperature is 80~E, the antlfouling polyethersuIfone/chitosan ultrafiltrafion membrane has excellent property. Under the operating conditions of 25℃ and 0.1 MPa, the pure water flux of the modified membrane is 745.22（ L/m2· h） with the BSA retention rate of 91.79%. The surface contact angle of modified ultrafiltration membrane is 74. 6°, and increased resistance coefficient is 0.54. The flux decay rate is less than the unmodified ultrafiltration membrane. It can be seen that the hydrophilic and antifouling properties of modified membranes was greatly improved.

关 键 词：聚醚砜 壳聚糖 超滤膜 耐污染 

分 类 号：TQ316[化学工程—高聚物工业]