Preparation,performance and application of polyvinylidene fluoride separation membrane modified by GO
The structure characteristic of polyvinylidene fluoride membrane and graphene oxide was main introduced,respectively,and the advantages of organic-inorganic hybrid membrane were analyzed.The preparation method of GO/PVDF membrane were stated in detail,including solution casting method,elec-trospinning method,chemical grafting method,vacuum filtration method and so on.Based on the recent re-search status,the advantages and disadvantages of the above methods were analyzed.Then,the effects of GO on pore size,hydrophilicity and hydrophobicity,membrane flux,rejection,and mechanical properties of membrane were expounded.And the applications of GO/PVDF membrane in water treatment and other potential applications were reviewed.It was found that the solution casting method was simple and short,and the membrane produced by the chemical grafting method had a stable bond between each component and a long service time,while the membrane produced by the electrostatic spinning method had a large specific surface area and high porosity.The capillary action of the GO lamellar capillarity occurred,and the smaller particles would pass through the GO lamellar at a faster speed,the membrane flux was im-proved in macroscopic view.GO also improved surface finish,reduced the impurities blockage and pollu-tion,and then improving service life of GO/PVDF membrane.The research direction and development trend of GO/PVDF membrane was prospected,thus would provide theoretical basis and technical support for the construction of efficient and stable PVDF separation membrane.
NETL
NSTL
万方数据
