| In this paper, 2-(Dimethylamino) ethyl methacrylate and acrylamide cationic emulsifier was designed, and the cationic emulsion was synthesized with it. Then applied the emulsion in ink jet printing. In addition, crosslinking system and functional monomer was added to improve the water resistance and the stability of the emulsion.Finally, a novel maleic acid polymerized emulsifier was synthesised, the content and results are as follows:Firstly, a cationic acrylate emulsion was synthesized by synergizing the self-prepared polymer emulsifier with the alkyl quaternary ammonium emulsifier. It was proved that the minimum particle size of the emulsion having good storage stability was obtained when the mass ratio of polymer emulsifier to hexadecyl trimethyl ammonium bromid(CTAB) was 19.6 :0.6.Meanwhile,the influence of different functional monomers on the water resistance and particle size of the polymer emulsion was studied. The result showed that the cationic emulsion gave the best water resistance when the functional monomer V-389 was added,and specifically gave the lowest water absorption 3.62% and good property when the dosage of V-389 was1. 7%(based on total weight of main monomers)Secondly, with taking acrylamide as monomer, CTAB as phase transfer emulsifying agent, a self-made polymer emulsifier was synthesized. The emulsifier is more stable comprising CTAB1.0 g, acrylamide 5.0 g,andepoxy chloropropane 5.2 g. The article also investigated the influences of different functional monomers on the polymer emulsion water resistance and particle size. The results showed: the cationic emulsion comprising double acetone acrylamide-oxalyl dihydrazide 1.0 g had the best water resistance.Thirdly, a cationic polyacrylate emulsion was synthesized via the self-made polymer emulsifier. Transmission electron microscope, differential scanning calorimetry analysis and submicron particle size analyzer were used to characterize the polyacrylate emulsion and investigate the ink absorption of the said emulsion. The results showed that the emulsion comprising N-hydroxymethyl acrylamide 4.60%(weight of the main monomers, the same below),allyltriMethoxysilane 2.30%, DM 19% and nano-sturcuted alumina transparent disperdion was10.67%(weight of emulsion) prepared by core shell emulsion polymerization gave optimal ink absorption and enabled a better printing.Fourthly, taking prepared acrylamide cationic emulsion with aluminum oxide, and applied it in ink jet printing. The emulsionthe gave a better performance. Transmission electron microscope was used to characterize the emulsion.Fifthly, a novel maleic acid cationic emulsifier was synthesized with using maleic anhydride(MA), N,N-dimethylethanolamine(DMA) and sodium chloroacetate as raw materials. With taking MA and DMA as the reactants and 4-toluene sulfonic acid(TsOH) as catalyst, the maleic acid diethanol amineester was synthesized, and then used it to react with sodium chloroacetate toprepare the novel polymerizable maleic acid cationic monomer by quaterisation reaction. The two phase titration with mixed indicator was used to measure the conversion rate and the IR and NMR analysis was employed to confirm the structure of the monomer. The optimum reaction conditions for the preparation of the targeted monomer were found asfollows : the molar ratio of DMA to ClCH2 COONa was 1 : 1.2, the reaction temperature and time was 70? and 6 h respectively. The conversion rate oftertiary amine reached 76.17%. Finally, the self-made monomer was used to produce cationic emulsifier, and the emulsifier was applied in emulsion polymerization to produce cationic emulsion which was stable. |
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