等离子改性PVDF超滤膜在MBR中耐污染性能研究  

Antifouling performance for polyvinylidene fluoride membrane modified by plasma treatment in a MBR

作　　者：李鹏[1] 杨庆[1,2,3] 丁昀[1] 刘俊洁[1] 拓鑫鑫 马岩红[1] 

机构地区：[1]兰州交通大学环境与市政工程学院 [2]兰州交通大学寒旱地区水资源综合利用教育部工程研究中心 [3]教育部长江学者创新团队(IRT0966),兰州730070 [3]教育部长江学者创新团队(IRT0966),兰州730070

出　　处：《膜科学与技术》2014年第3期110-115,共6页Membrane Science and Technology

基　　金：国家自然科学基金资助项目(50578072);教育部长江学者创新团队(IRT0966);寒旱地区水资源综合利用教育部工程中心

摘　　要：对聚偏氟乙烯（PVDF）中空纤维超滤膜进行丙烯酸（Acrylic Acid,AA）等离子体化学沉积改性,傅里叶衰减全反射红外光谱（FT-IR）、扫描电镜（SEM）、能谱仪（EDS）及力学性能试验分析表明,膜表面引入了羧基,成功接枝了AA聚合单体,且改性膜柔韧性得到提高,改性后膜清水通量增加了12.04％～16.12％.采用漫没式MBR反应器,在气水比为20∶1条件下对改性膜与原膜进行平行对比实验,实验表明,表面性能的改变可有效阻碍滤饼层污染物在膜表面沉积与压实.经水力及化学清洗后,改性膜通量恢复率都略高于原膜,抗滤饼层污染的能力得到提高.改性膜与原膜出水浊度为0.0～0.6 NTU,COD去除率数据表明改性膜出水效果略优于原膜.Polyvinylidene fluoride （PVDF） hollow fiber ultrafiltration membrane was modified by acrylic acid （AA） plasma chemical sedimentary.The experiments of Fourier attenuated total reflection infrared spectroscopy （FT-IR）,scanning electron microscopy （SEM）,EDS and mechanical properties test analysis showed that after modified,there were some carboxyl in the membrane surface,and AA monomer was grafted successfully.Meanwhile,the flexibility of modified membrane was improved,and water flux increased by 12.04％-16.12％.Using submerged MBR reactor,gas-water ratio with 20 ∶ 1,the modified membrane and the original membrane were made parallel contrast experiment.The results show that the change of surface properties of membrane can hinder sedimentary and compacting of cake layer pollutants effectively on the membrane surface.After hydraulic and chemical cleaning,the flux recovery rate of modified membrane flux recovery rate is slightly higher than the original film,so the ability of resistance cake layer pollutants modified membrane is stronger than original membrane.The effluent turbidity of membrane and original membrane were 0 NTU,and the COD removal rate showed that the water effect of modified membrane was better than the original membrane.

关 键 词：等离子体 PVDF MBR 滤饼层 

分 类 号：TQ051.893[化学工程]