添加剂PVA对PVDF/丝瓜络共混膜结构及抗污染性的影响  

Effect of Additive PVA on Structure and Pollution Resistance of PVDF/Loofah Blend Membrane

作　　者：高栋 张立卿 史美娜 张志强 杨镇豪 胡吉玉 GAO Dong;ZHANG Liqing;SHI Meina;ZHANG Zhiqiang;YANG Zhenhao;HU Jiyu(School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,China;Weilai Planning and Design Institute Co.,LtU.,Weilai 264200,China;Bering Drainage Technology Co.,Ltd.,Beijing 100020,China)

机构地区：[1]济南大学土木建筑学院,山东济南250022 [2]威海市规划设计研究院有限公司,山东威海264200 [3]北京北排科技有限公司,北京100020

出　　处：《净水技术》2019年第9期107-112,125,共7页Water Purification Technology

基　　金：国家自然科学基金项目(51408260);山东省重点研发计划项目(2016GSF117006);西部绿色建筑国家重点实验室培育基地开放研究基金(LSKF201807)

摘　　要：采用浸没沉淀相转化方法制膜,以聚乙烯醇(PVA)作为膜结构调控和亲水化改性的添加剂,考察了在PVDF和丝瓜络纤维含量分别为16%和1.2%的铸膜液体系中,PVA的聚合度和添加量对PVDF/丝瓜络共混膜的亲疏水性、纯水通量和截留率的影响规律,PVA改性膜以及对模拟废水的处理性能。结果表明:PVA的加入,使得共混膜表面膜孔趋于圆孔,同时孔隙率提高,接触角继续减小。分别以过滤腐植酸和海藻酸钠两种典型污染物配制的模拟废水为处理对象时,改性膜比通量衰减幅度较小,膜稳定通量高。The membrane was formed by an immersion-precipitation phase transformation method. Polyvinyl alcohol(PVA) was used as the additive of membrane structure regulating and hydrophilic modification. Effects of the degree of polymerization and the dosage of PVA on hydrophilia and hydrophobicity, pure water flux and rejection of PVDF/luffa blend membrane, and treatment performance of PVA modified membrane on simulated wastewater were investigated in the casting solution systems with PVDF and luffa complex fiber contents of 16% and 1.2%, respectively. The results showed that with the addition of PVA, membrane pores on the surface of blend membrane tended to be round, meanwhile the porosity increased and the contact angle continued to decrease. When the simulated wastewater prepared with humic acid and sodium alginate respectively were used as filtration objects, the modified membrane had a smaller attenuation than the flux and a higher stable flux. Hydrophilic sodium alginate was more susceptible to membrane fouling than hydrophobic humic acid.

关 键 词：添加剂 聚乙烯醇 共混膜 亲水化改性 膜结构调控 

分 类 号：X703.1[环境科学与工程—环境工程]