摘要
用化学氧化聚合法,以苯胺(An)为单体,过硫酸铵(APS)为氧化剂,控制反应温度,在酸性介质(无机酸和有机酸)中合成聚苯胺(PAn)。用傅里叶红外光谱(FTIR)和紫外可见光光谱(UV-Vis)对聚苯胺掺杂前后结构的变化进行了测试,讨论了酸掺杂对聚合产物结构的影响,结果表明电子的离域使聚苯胺主链结构经质子酸掺杂后形成了共轭结构。常温下,通过聚苯胺的气敏性能测试,得知有机酸掺杂的聚苯胺的气敏性能更好,其中用磺基水杨酸掺杂的聚苯胺对1000 ppm氨气的灵敏度最高,达到了14.8580,具有实际应用价值。最后初步探讨了聚苯胺的气敏机理。
Aniline was oxidized by ammonium persulfate（APS） in acidic aqueous solutions（inorganic acid and organic acid） at manipulative temperature for the synthesis of polyaniline. By means of FTIR spectra and LIV-Vis spectra, the structural changes of intrinsic and doped polyaniline were measured. The effects of acidic doped action on polymers＇ structure were discussed. The result indicated that the main chain＇s structure of polyaniline had formed conjugated structure by electron＇s scattering after proton acid＇s doped action. From the testing of gas sensitivity of polyaniline at room temperature, it was showed that the organic acid doped polyaniline had better gas sensitivity, thereinto, the polyaniliue doped by SSA had the highest sensitivity as 14. 8580 to 1000ppm NH3. The sensing machinasm of polyaniline was also studied.
出处
《化工技术与开发》
CAS
2007年第6期7-9,18,共4页
Technology & Development of Chemical Industry
