Preparation Of Dopamine Biomimetic Modified Molecularly Imprinted Nanocomposite Membrane And Study On The Behavior And Mechanism Of Antibiotics In Selective Separation Environment

The study of molecularly selective materials is of great significance for the development of water treatment,biological,pharmaceutical,environmental,chemical and other fields.Among them,the demand for selective separation materials that can quickly identify and separate specific compounds is large.In recent years,molecularly imprinted membranes based on membrane separation technique and molecularly imprinting technique have been extensively explored,as well as their specific selectivity,stability and regenerative type have good application prospects.However,since the development of molecularly imprinted membranes is still in its infancy,deficiencies such as selectivity and structural stability limit its higher level of development.Therefore,we have developed a method for preparing biomimetic nanocomposite membranes based on dopamine biomimetic modification technique and atom transfer radical polymerization for the construction of molecularly imprinted nanocomposite membranes with excellent selectivity for the selective separation of artemisinin and ciprofloxacin.The multilayer modification method can uniformly disperse the nanocomposites on the surface of membranes,thereby promoting stable and uniform growth of the imprinted polymer layer on the film.This novel imprinting method not only enables the reaction to be initiated at room temperature,but also enables the imprinting process to be carried out in an aqueous solution.The chemical composition and micromorphology of the membranes were characterized by various methods.The selectivity of the prepared membranes towards targets was studied by isothermal adsorption and kinetic adsorption.The selective mechanism of the molecularly imprinted membranes was carried out by the selective permeation.The regeneration performance of the molecularly imprinted membranes was obtained based on the adsorption/extraction cycles.In addition,this new biomimetic synthesis method will provide new ideas for the preparation of molecularly imprinted membranes.