摘要
PVDF膜由于其较强的疏水性能,在水处理应用中需要较强的驱动力,使得运行费用增加;同时膜的疏水性也会导致膜污染、膜堵塞,从而造成膜水通量的降低。因此,针对此问题,提出了PVDF膜的改性,通过对PVDF膜进行改性来提高它的亲水性能从而改善膜的性能。介绍了近年来PVDF膜亲水改性的研究新进展,PVDF膜的改性主要有表面改性和共混改性,表面改性主要有表面接枝与表面涂覆,共混改性主要的共混物质有亲水聚合物、无机纳米粒子以及碳基纳米材料等。研究发现,通过改性后的PVDF膜亲水性能、抗污染性能以及膜的机械性能都有所提高。这为解决PVDF膜的污染问题提供了一种实际可行的方法,并通过提高其亲水性而降低了运行成本。
Attributed to the strong hydrophobic properties of PVDF,it requires a strong driving force in water treatment applications,resulting in increased operating costs.At the same time,membrane hydrophobicity also causes membrane fouling and membrane clogging making a dramatic decrease in membrane water flux.Therefore,in order to solve the issues,the paper presents the modification of PVDF membrane so as to improve the performance of the membrane.The research progress of hydrophilic modification of PVDF membrane in recent years is introduced.The modification of PVDF membrane mainly includes surface modification mainly divided into surface grafting and surface coating,and blend modification,the blend materials are hydrophilic polymers,inorganic nanoparticles and amphiphilic polymers etc.It found that anti-pollution performance and membrane mechanical properties of PVDF membrane have increased after modification,which provides a practical solution to the problem of contamination of PVDF membranes and reduces operating costs by increasing their hydrophilicity.
作者
杨彤
张和田
郭冀峰
吴世红
YANG Tong;ZHANG He-tian;GUO Ji-feng;WU Shi-hong(Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas,Ministry of Education,School of Environmental Science and Engineering,Chang'an University,Xi'an 710054,China;Tianjin Research Institute for Water Transport Engineering,Ministry of Transportation,EnvironmentalTechnology Development of Tiwte (Tianjin) Co.,Ltd.,Tianjin 300456,China)
出处
《应用化工》
CAS
CSCD
北大核心
2019年第1期180-183,187,共5页
Applied Chemical Industry
基金
中央高校基本科研业务费资助项目(310829172002)
中央高校教育教学改革专项(300103183102)
长安大学国家级大学生创新计划(201810710105)
关键词
PVDF膜
表面改性
共混改性
膜污染
PVDF membrane
surface modification
blending modification
antifouling
