Ag3PO4改性PVDF超滤膜的结构与性能

doi:10.11949/j.issn.0438-1157.20140920

化工学报 ›› 2015, Vol. 66 ›› Issue (1): 471-477.DOI: 10.11949/j.issn.0438-1157.20140920

• 材料化学工程与纳米技术 • 上一篇下一篇

Ag₃PO₄改性PVDF超滤膜的结构与性能

周婕¹, 文晨¹, 吴佳朋¹, 肖长发²

1 天津工业大学环境与化学工程学院, 天津 300387;
2 膜材料与膜过程国家重点实验室培育基地, 天津 300387

收稿日期:2014-06-19 修回日期:2014-08-12 出版日期:2015-01-05 发布日期:2015-01-05
通讯作者: 文晨
基金资助:
国家重点基础研究发展计划项目(2012CB722706)。

Properties and structure of PVDF membrane modified by Ag₃PO₄ powders

ZHOU Jie¹, WEN Chen¹, WU Jiapeng¹, XIAO Changfa²

1 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
2 State Key Laboratory of Membrane Materials and Processes, Tianjin 300387, China

Received:2014-06-19 Revised:2014-08-12 Online:2015-01-05 Published:2015-01-05
Supported by:
supported by the National Basic Research Program of China(2012CB722706).

摘要/Abstract

摘要：

将不同量Ag₃PO₄均匀地分散在聚偏氟乙烯(PVDF)铸膜液中, 利用相转化法制备了改性PVDF膜, 通过扫描电镜(SEM)、接触角测定、过滤实验和污染性测试等研究了其微结构、分离性和耐污染性等, 并考察了膜污染后的清洗效果。结果表明, 添加Ag₃PO₄ 的PVDF膜具有不同的微结构与性能, 当添加1% 的Ag₃PO₄时, 膜皮层变薄、微孔数增多, 并呈现出最优化的水通量、亲水性、力学性、抗污染能力和截留率等。采用太阳光-水清洗能使改性膜的通量恢复率达到85%以上。

关键词: 膜, 过滤, 分离性, Ag₃PO₄, 膜污染, 亲水性

Abstract:

PVDF ultrafiltration membranes were prepared by the phase-inversion method with different contents Ag₃PO₄ powders dispersed uniformly in the PVDF casting solution. The microstructure, separation performance and antifouling ability of such PVDF membrane and modified membranes were investigated using SEM, contact angle, cross flow filtration, and antifouling measurements, and cleaning effect for the fouled membrane was also observed. The modified membranes exhibited differences in microstructure and properties due to a specific content of Ag₃PO₄ powders addition. At mass fraction 1% Ag₃PO₄, the thickness of skin layer decreased while fine interfacial micropores increased, meanwhile the modified membranes had excellent water permeability, hydrophilicity, mechanical properties, antifouling ability and elevated retention for humic acid (HA)solution. In addition, sunlight/water cleaning in aeration could effectively recover the flux of PVDF₁ membrane to above 85%.

Key words: membrane, filtration, separation performance, Ag₃PO₄, fouling, hydrophilicity

中图分类号:

TQ028.8

周婕, 文晨, 吴佳朋, 肖长发. Ag₃PO₄改性PVDF超滤膜的结构与性能[J]. 化工学报, 2015, 66(1): 471-477.

ZHOU Jie, WEN Chen, WU Jiapeng, XIAO Changfa. Properties and structure of PVDF membrane modified by Ag₃PO₄ powders[J]. CIESC Journal, 2015, 66(1): 471-477.

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Ag₃PO₄改性PVDF超滤膜的结构与性能

Properties and structure of PVDF membrane modified by Ag₃PO₄ powders

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