Synthesis And Characterization Of Polyurethane Functional Composites Based On Cyclodextrin Inclusive Interactions

In recent years,a large number of water pollutants such as dyes and endocrine disruptors(EDCs)in industrial wastewater have caused people's concern about the aquatic environment and the safety of potable water.Based on the cyclodextrin inclusive interactions,a series of cyclodextrin/polyurethane functional composites were synthesized in this paper to treat pollutants in water by adsorption and photocatalysis.First,this paper uses aliphatic diisocyanate(hexamethylene diisocyanate HDI)and aromatic isocyanate(p-phenylene diisocyanate PDI,diphenylmethane diisocyanate MDI)as the crosslinking agent to react with?-cyclodextrin.Three ?-cyclodextrin/polyurethane composites(CD-HDI,CD-PDI,and CD-MDI)were synthesized,respectively,and the structure of the composite and its isothermal properties for bisphenol A(BPA)and methylene blue(MB)were studied.The adsorption behavior and kinetics were studied.The experimental data were fitted with different isothermal adsorption models and kinetic equations.The results show that such ?-cyclodextrin/polyurethane composites exhibit excellent adsorption performance and good reproducibility.In addition,in this paper,cyclodextrin/titanium dioxide/polyurethane composite catalyst material ?-CD-TiO2 was synthesized by grafting cyclodextrin onto the surface of titanium dioxide with TiO2 nanoparticles as the main body and hexamethylene diisocyanate(HDI)as the crosslinking agent.At the same time,the photocatalytic degradation effect of the composite catalyst material on the dye methylene blue was studied,and it was found that the composite catalyst material has a greater improvement in the catalytic effect of methylene blue under visible light compared to pure titanium dioxide.