Reseach Of Synthesis And Properties Of The Anion Adsorption Resin With Hyperbrached Structure

A hyperbranched polyether was synthesized by the AB2type growth monomer of3-methyl-3-(hydroxymethyl)oxetane with Boron trifluoride diethyl etherate as initiatortrimethylolpropane as a B3central core using the cationic ring-opening polymerizationmethod. ion exchange resin with quaternary ammonium functional groups was synthesized byHyperbranched polyether with glycidyl trimethylammonium chloride. different algebraicstructure containing hyperbranched resin and the different ratio of functional groups graftedwith hyperbranched resin was synthesized, Adsorption feature of the synthetic resins withrespect to the purification effect were investigated systemically. Containied hyperbranchedstructure of the ion exchange resin was successful synthesized by the infrared spectroscopyand NMR spectroscopy. the adsorption capacity of ion resin with hyperbranched structure wasaffected by the grafting of hyperbranched, the ratio of functional groups grafted withhyperbranched resin, temperature, pH, ion concentration, The classical models that theinductive effect transmitted to the first layer and the adsorption process contained in onecompartment could not explain our experimental results reasonably. Thus, a new adsorptionisotherm model that the inductive effect passed on to a higher layer and a new adsorptionkinetics model in which the adsorption process contained more compartments were createdaccording to the multiparameter theory and Karickhoff’s theory by investigating theregression of the experimental results. Different from traditional adsorption patterns, theresults showed interesting conclusions:①The adsorption capacity of ion resin with hyperbranched structure was increased withthe increasing hyperbranched structure algebra of S1,S2,S3. the largest adsorption amountresin was S3, which the adsorption amount was0.142mg/g. the adsorption capacity of ionresin with hyperbranched structure was changed with the changing the ratio of functionalgroups grafted with hyperbranched resin. The ratio of functional groups grafted withhyperbranched resin was1:10in S3resin, which has a large adsorption amount.②The adsorption amount of resin had the same structure was rised as the temperaturerises. At the same temperature, The adsorption amount of resin was rised as the the algebra ofhyperbranched increased. The time of adsorption in equilibrium is shorten and The adsorption amount increased when the temperature is raised。③The adsorption amount of resin was not changed by the pH, when the hyperbranchedstructure algebra and the ratio of functional groups grafted with hyperbranched resin werechanged.④The time of adsorption in equilibrium is shortened and the adsorption amountincreased as the grafted functional groups growing at the hyperbranched resin. The time ofadsorption in equilibrium decreased with the grafted functional groups growing at the secondgeneration of hyperbranched resin.⑤a new adsorption isotherm model were created，founding that the the degree offunctionality of the functional group, the generation of hyperbranched resin, and themolecular weight of adsorbate, the solution concentration of adsorbate, the solution volume ofadsorbate would play important roles in the adsorption kinetic process.⑥The adsorption amount of resin was not affected changed by the cationic, but theanions could affect the resin properties by The ionic radius and charge of the anion.However, the resin with hyperbranched structure has a better adsorption amount than thecommercially available products.