Preparation, Modification And Application Of Hydroxyethyl Methylacrylate Porous Resin

Hydroxyethyl methacrylate is used as the monomer to react with other monomerscontaining functional groups due to the advantage of its own structure and it can also befunctional based on its own activity hydroxy group. So resins and coatings could bemodified with hydroxyethyl methacrylate. Reacting with other acrylate monomers,acrylic resin with side chain containing activity hydroxy group could be obtained andused in the esterification reaction and the crosslinking reaction; reacting with epoxymonomers, double or triple component resins could be prapared. In this paper, weprepared serious of copolymers and terpolymers by suspension polymerization,hydroxyethyl methacrylate used as monomer. Magnetic porous terpolymers and porouschelating copolymers were obtained according to the modification reaction, respectively.In addition, we also investigated their application properties.(1) Synthesis and founctinaliazed of hydroxyethyl methacrylate-glycidylmethacrylate-ethylene glycol dimethacrylate （HEMA-GMA-EGDMA） porous resinsA serious of beaded terpolymers containing epoxy groups and hydroxyl groups, atdegrees of crosslinking30%,40%,50%,60%,65%were synthesized by suspensionpolymerization with HEMA、GMA as monomers, EGDMA as cross-linker, in whichbutyl acetate and n-octanol were usded as porogent. In order to broaden the applicationsof terpolymers, we prepared magnetic terpolymers in the presence of Fe3O4nanoparticles. Infrared spectroscopy, Physical adsorption, X-ray diffraction (XRD) andVibrating sample magnetometer (VSM) were used to characterize their structure andproperties.(2) The application of porous terpolymersThe covalent bond can be carried out by the reaction between the epoxy groups ofterpolymers and the amino groups of cellulase (protein). In view of this, we examinedthe effect of pH on the loading amounts of cellulase and discussed the effects oftemperature, pH, the reused times on the residual activities of free and immobilizedcellulases to determine the optimal catalytic conditions.(3) Synthesis and functionalization of poly(hydroxyethyl methacrylate-ethyleneglycol) P(HEMA-EGDMA) and poly(hydroxyethyl methacrylate-dimethylhydroxyethyl dimethacrylate P(HEMA-GDMA) porous resinsPorous beaded copolymers containing different hydroxyl groups, with HEMA as monomer, EGDMA、GDMA as cross-linking agents respectively, were synthesized bysuspension polymerization by adding porogens of amyl acetate and n-octanol. Based onthe modification of activitive hydroxyl group,(3-Mercaptopropyl) trimethoxysilane(MTEP) was used to modify the above porous copolymers. Infrared spectroscopy,Spectroscopy electron microscopy (SEM), Physical adsorption and X-ray diffraction(XRD) were used to characterize their structure and properties.(4) The application of porous copolymersIn this paper, the obtained copolymers were used to adsorb lead ions. The effects ofexternal conditiond such as the initial concentration, reused times, contact time on theadsorption process were studied. We also investigated the adsorption kinetics andadsorption isotherm of the noval copolymers towards lead. Adsorption kineticses andadsorption isotherms were fitted with the correspond theories. In addition, Gibbs freeenergy, the corresponding enthalpy and entropy change were also calculated.Main Innovative Points:1. A series of new porous terpolymers were synthesized and they were modifiedwith magnetic nanoparticles.2. The two novel porous coplymers were prepared and they were modified with(3-Mercaptopropyl) trimethoxysilane, then thiol-based porous chelating resins wereobtained.3. The above copolymers and terpolymers were used to adsorb lead ions andimmobilize cellulase, respectivly.