Functional Polymer Micro/nanospheres Are Used In The Study Of Transport And Separation Systems

In recent years,many researchers have been paying attention to transmission and separation.In view of the problems of small specific surface area,irregular arrangement of pores,poor permeability and unchangeable pore size in the prior art membranes,the paper mainly focuses on the application of functional polymer microsphere.In the transmission separation system.The main work and conclusions are as follows:1.The highly ordered smart thermo-and p H-responsive microfiltration membrane was successfully synthesized by using Si O2 colloidal crystals as the templates.By introducing the thermo-responsive PNIPAM and p H-responsive PMAA into the membrane,the structures exhibited smart temperature-and p H-responsive property.The permeability of the column in response to changes in temperature and p H value was investigated by measuring the conductivity of KCl solutions.At the point when the temperature increased from 20 to 40? or the p H decreased from 8 to 3,the polymer shrank and prompted the development of the microchannels,bringing about higher conductivity.The conductivity decreased due to drop in temperature or rise in p H owning to the stretching of PNIPAM and PMAA chains and segments.The synthetic strategy which developed in this work could be utilized as a part of microfiltration,separation,purification,sensor and other applications.2.The smart magnetic responsive switch membranewere successfully synthesized by using Fe3O4@Si O2 colloidal crystals as the templates.The permeability of the column in response to changes in magnetic field was investigated by measuring the conductivity of KCl solutions.The conductivity of ICC with magnetic field is far below that without magnetic field.This was probably because that the Fe3O4 magnetite nanoparticles block the through-hole structure.The synthetic strategy which developed in this work could be utilized as a part of sensor and other applications.3.The successful application of MOFs in capillary electrophoresis by taking ZIF-8 nanocrystals as an example for effective separation of proteins.ZIF-8 nanocrystals have unique structure of the three-dimension porous frameworks.Baseline separation of Lys,CC,BSA and RNase A can be achieved within 10 minutes using the ZIF-8 nanocrystals coated capillary column under the optimum separation conditions.Moreover,the ZIF-8 nanocrystals coated capillary has good reproducibility and stability.The D-and L-phenylalanine were successfully separated using complexing ZIF-8 nanocrystals.Additionally,this ZIF-8 nanocrystals coated capillary column was also applied to separate the complex samples.This method is environmentally friendly and easily which can widely used in amino acids,protein et.alseparation?4.A novel fluorine-containing polymer was prepared by introducing trifluoromethylphenyl group in the poly(phenylene ether)structure.The permeability of carbon dioxide prepared by the gas separation membrane was significantly increased,and the infiltration of carbon dioxide and nitrogen The rate difference is obviously increased,which can effectively realize the separation of carbon dioxide and nitrogen.