| In order to prepare strong acidic cationic exchange resin by green process, the two kinds of advanced technologies were used and the waterborne resin which is used in ion exchange membrane by emulsion polymerization was prepared in the paper. Crosslinked polymeric GMA-DVB bead with the reactive epoxy group was synthesized by aqueous suspension polymerization in the first technology process. Then, amino sulfonic acid sodium was added to the bead to prepare strong acid cation-exchange resin.Its ion exchange capacity(IEC) is 2.44meq/g.The influence of reaction temperature, reaction time and the content of crosslinking agent on the preparation of GMA-DVB beads were discussed in the study, and then the strong acid cation-exchange resin was characterized by FT-IR and Elemental analyzer. The second technology process is that hydrophobic monomer trioctylammonium-hydrogen-styrenesulfonate (TOA-H-SS) was prepared by modifying p-styrenesulfonic acid sodium salt with trioctylamine. Then, this monomer polymerized with divinylbenzene to synthesize crosslinked poly(TOA-H-SS-DVB) copolymers beads via suspension copolymerization.TOA was exchanged by Na+ to migrate out the TOA-H-SS-DVB bead in alkaline condition, then strong acid cation exchange resin was achieved. Its ion exchange capacity(IEC) is 3.56meq/g. FT-IR and 1HNMR spectra were used to confirm the conversion of p-styrenesulfonic acid sodium to hydrophobic monomer, and the effect of pH and temperature on stability of hydrophobic monomer was discussed. The characteristic of surface state of the TOA-H-SS-DVB bead was measured by the mercury porosimeter experiments and scanning electron microscopy (SEM). The influence of dosage of toluene, n-heptane and DVB on surface area and pore size were investigated respectively. It was stated that IEC and S% parameters of the strong acid cation exchange resin depend on the DVB, concentration of NaOH and time of deshielding were discussed as well.In this paper, the waterborne resin which average particle size is about 0.1 μm and capacity of ion exchange is 2.7meq/g was prepared.The waterborne resin can not only form homogeneous ion exchange membrane and also be directly coated on the substrate to form heterogeneous strongly acidic ion exchange membrane. The influence of reactive emulsifiers, the dosage of DVB, n-butyl acrylate and acrylic acid-2-ethylester on the properties of waterborne resin and the membrane were investigated in the sduty. |
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