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以苯胺(An)单体为原料,过硫酸铵(APS)为氧化剂,2-丙烯酰胺-2-甲基丙磺酸(AMPS)和柠檬酸(CA)为共掺杂剂,采用化学氧化法合成掺杂态水溶性聚苯胺(PANI)。借助红外光谱(FT-IR)、热重(TGA)、紫外可见光谱(UVVis)对合成PANI的结构和性能进行表征。结果表明,磺酸基团有效地接入PANI主链结构中;AMPS与CA共掺杂所得PANI热稳定性能比单一AMPS或CA掺杂所得PANI有很大提高;UV-Vis光谱吸收峰蓝移程度与掺杂态物质种类有关。研究发现,当合成温度为30℃,AMPS和CA的摩尔比为1∶1,An单体与APS的摩尔比为1∶2时,合成的AMPSCA共掺杂PANI水溶性高达90%。
Using aniline monomer as raw material, ammonium persulfate (APS) as oxidant, 2-acrylamide-2-methylpropanesulfonic acid (AMPS) and citric acid Synthesis of doped water-soluble polyaniline (PANI). The structure and properties of PANI were characterized by FT-IR, TGA and UVVis. The results show that the sulfonic acid groups are effectively connected to the PANI backbone structure. The thermal stability of PANI obtained by co-doping AMPS with CA is much higher than PANI doped with AMPS or CA. The blue shift of UV-Vis absorption peak The degree of doping substances related to the type. The results showed that when the molar ratio of AMPS to CA is 1: 1, the molar ratio of An to APS is 1: 2, the synthesized AMPSCA co-doped PANI has a water solubility of up to 90%.