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为了深入研究掺杂剂对聚苯胺水分散液稳定性的影响,通过将不同摩尔比的二乙二醇单甲醚(DEGME)与三氯氧磷(POCl3)反应合成一系列带有短链乙氧基的酸性磷酸酯掺杂剂。在酸性条件下,采用过硫酸铵氧化法制备聚苯胺,经氨水脱掺杂获得本征态聚苯胺;并用傅立叶变换红外光谱、紫外-可见光谱对磷酸酯掺杂剂和聚苯胺的结构进行了表征。将所合成的磷酸酯掺杂剂与本征态或掺杂态聚苯胺混合,研究确定聚苯胺在水中具有最佳分散效果时所对应的POCl3和DEGME的摩尔比。结果表明:当POCl3和DEGME的摩尔比为1∶4时,制备的磷酸酯掺杂聚苯胺的分散稳定性最好。此外,带有短链乙氧基的酸性磷酸酯掺杂本征态聚苯胺比掺杂导电聚苯胺的分散效果好。
In order to further study the influence of dopants on the stability of polyaniline aqueous dispersion, a series of copolymers with short chain B (B) were synthesized by reaction of different molar ratios of diethylene glycol monomethyl ether (DEGME) with phosphorus oxychloride (POCl3) Oxy-acid phosphate ester dopant. The polyaniline was prepared by the ammonium persulfate oxidation method under acidic conditions and the intrinsic polyaniline was dedoped by ammonia water. The structures of the phosphate doping agent and polyaniline were also studied by Fourier transform infrared spectroscopy and UV-Vis spectroscopy Characterization. The synthesized phosphoric acid ester dopant was mixed with eigenstate or doped polyaniline to determine the molar ratio of POCl3 to DEGME when polyaniline had the best dispersing effect in water. The results show that when the molar ratio of POCl3 to DEGME is 1: 4, the dispersion stability of the prepared phosphate-doped polyaniline is the best. In addition, acidophosphate-doped eutectic polyaniline with short chain ethoxylate has better dispersion than doped conductive polyaniline.