High performance ultra filtration composite membrane that a kind of graphene oxide is modified and preparation method thereof

High performance ultra filtration composite membrane being modified the invention discloses a kind of graphene oxide and preparation method thereof, by method of chemical immersion and layer assembly method, is modified commercialization polyvinylidene fluoride (PVDF) ultrafiltration membrane using graphene oxide, prepares high performance ultra filtration composite membrane.Modification procedure is as follows：Activate polyvinylidene fluoride (PVDF) ultrafiltration membrane；Pyromellitic trimethylsilyl chloride solution is impregnated, acid chloride group is grafted；Oxide impregnation graphene solution；Cycle alternation dipping ethylenediamine, graphene oxide solution, make graphene oxide be connected by ethylene diamine linker and form layer structure on film surface, obtain the graphene oxide composite membrane of the different numbers of plies.Graphene oxide polyvinylidene fluoride (PVDF) ultrafiltration membrane prepared by the present invention has the advantages that flux is high, resistance tocrocking is strong, pollutants removal rate is high, its water flux is up to 3750~10150kg/m2h, clearance to dissolved organic matter is 36.5~68%, and milipore filter improves 15% more before modified.