Preparation And Adsorption Properties Of Phenol Molecularly Imprinted Polymers

Phenol is toxic and carcinogenic organics,produced in various industrial production field.It is great harmful to human and environment,so to establish efficient and sensitive detection and separation method is necessary.In this thesis,three different phenol molecularly imprinted polymers(membrane)were prepared based on the technique of molecular imprinting,membrane separation technique,metal complex and magnetic materials.The molecularly imprinted polymers(membrane)were characterized and analyzed by Fourier transform infrared spectrometer(FT-IR),scanning electron microscope(SEM),X-ray diffract meter(XRD),transmission electron microscopy(TEM),vibrating sample magnetometer(VSM).And the adsorption capacity was also under study.Firstly the molecularly imprinted membrane(MIM)was prepared used phenol as the template molecular.The orthogonal test result showed optimize condition was n(phenol):n(4-VP):n(EGDMA)=1:4:20,the nylon membrane as the basement membrane.The MIM prepared under the optimize condition reached adsorption balance in 4h for phenol.The maximum adsorption capacity was 0.306?mol/cm~2.The permeation experiments and selective permeation experiments showed that the MIM has high selectivity and specific recognition for phenol.Secondly the complexing molecularly imprinted polymer(MIP-Zn(?))was prepared used phenol-Zn(?)complex as template molecular.The process of imprinting and the ratio between phenol and Zn(?)was studied by UV and FT-IR.The maximum adsorption capacity of the MIP-Zn(?)was 27.65?mol/g.The research on different substrates and ions showed the MIP-Zn(?)has specific recognition for phenol-Zn(?)complex rather than phenol.And also prove the metal complexing molecular imprinting polymers can used in polar solvent.Lastly the magnetic molecularly imprinted polymers(Fe3O4@MIP)was prepared used Fe3O4 as the magnetic center,phenol as template molecular.The crystal form,morphology and magnetism were characterized and analysis by XRD,FT-IR,SEM,TEM,VSM.The results showed the Fe3O4@MIP has inverse spinel structure,and good superparamagnetism.The dynamic adsorption experiments and adsorption isotherm experiments showed the maximum adsorption capacity of Fe3O4@MIP was25.62?mol/g.The dynamic adsorption model and adsorption isotherm model analysis showed the adsorption was conform to pseudo-second-order model and Langmuir isotherm model.