新型五孔PVDF共混改性膜抗污染性能研究  

Study on anti-fouling properties of novel five-bore PVDF blend modified membranes

作　　者：黄健平[1,2] 邵玉敏[2] 刘莉莉[2] 马春燕[1] 刘纳[2] 奚旦立[1] 阎克路[1] 

机构地区：[1]东华大学环境科学与工程学院化学化工与生物工程学院,上海200051 [2]华北水利水电学院环境与市政工程学院,郑州450011

出　　处：《膜科学与技术》2012年第3期64-69,74,共7页Membrane Science and Technology

基　　金：国家科技重大专项"水体污染控制与治理"(2009ZX07210-002);上海市自然科学基金项目(11ZR1400800)

摘　　要：观察新型五孔PVDF共混改性纤维膜SEM形貌特征,测量改性膜的接触角和临界通量,1#(PVDF/PMMA/TPU)、2#(PVDF/PMMA/PVC)共混改性膜分别在次临界和超临界通量下进行过滤实验.结果表明:PVDF共混改性膜具有优良的微观结构,且1#共混膜性能较好;1#共混膜的接触角比2#共混膜小;1#、2#共混膜的临界通量分别为10和14L/(m2.h);1#共混膜比2#共混膜抗污染性能好;次临界通量下共混膜的运行比超临界通量下的稳定.两种共混膜分别在次临界通量下采用单独超滤和混凝+超滤工艺处理某市地表水,得出混凝+超滤工艺处理效果较好,且1#共混膜比2#共混膜处理效果好.The morphologies for of novel five-bore PVDF blend modified membranes were observed by SEM. The water contact angle and critical fluxes of different novel five-bore PVDF hollow fiber membranes were measured. Then the filtration experiments at sub-critical flux and super-critical flux of No. 1 （PVDF/PMMA/TPU）blend modified membrane and No. 2 （PVDF/PMMA/PVC） blend modified membrane were carried out. The results showed that the PVDF blend modified membranes possessed excellent microstructure and the microstructure of No. 1 was better. The contact angle of No. 1 blend membrane was lower than that of No. 2 blend membrane. The critical fluxes of two blend membranes were 10 L/（m^2· h） and 14 L/（m^2 · h）, respectively. The anti-fouling property of No. 1 blend membrane was better than that of No. 2 blend membrane. The operating characteristic under sub-critical flux was more stable than that of under super-critical flux~ Two blend membranes were used to treat ground-surface water under sub-critical flux and the effects of that with coagulation as pretreatment were studied. The results showed that the wastewater treatment performance of coagulation-ultrafiltration combination process was better than that of ultrafiltration process alone, and the wastewater treatment performance of No. 1 blend membrane was better than that of No. 2 blend membrane.

关 键 词：五孔共混膜 临界通量 过滤实验 抗污染性能 地表水处理 

分 类 号：TB383.2[一般工业技术—材料科学与工程]