银-DBSA掺杂聚苯胺的制备及应用研究

采用苯胺，过（二）硫酸铵（NH4）2S2O8、硝酸银AgNO3、甲醛、十二烷基苯磺酸钠等为原料，合成了银-DBSA掺杂的聚苯胺。最佳合成的具体条件：反应温度在0～5℃下，苯胺、（NH4）2S2O8和十二烷基本磺酸钠摩尔比为4：4：1,加入的AgNO3的物质的量为苯胺的10%，反应4.5小时后，再加适量的甲醛还原得到银-DBSA掺杂聚苯胺。样品的IR光谱表明，通过还原后峰型和峰位都发生了明显的变化。样品的XRD分析知,银-DBSA掺杂聚苯胺有很强的金属元素银的峰,样品的SEM表明,还原得到的银-DBSA掺杂聚苯胺的颗粒度更小，且有许多银白色的银粒分散在高聚物大分子中。样品的TG热分析表明，银-DBSA掺杂聚苯胺在420℃以下是很稳定的，说明掺入银后的聚苯胺的热稳定性得到了显著的增强。用四探针电阻仪测试样品的电导率约为14S/cm，因此它是很有希望用于全印制电路技术的新材料。

Synthesized and property researched of the siliver-DBSA doped polyaniline

This paper introduces polyaniline, （NH4）2S2O8, AgNO3, formaldehyde, sodium and other raw materials, as well as synthesis of silver-DBSA doped polyaniline. Best synthesis of the specific conditions is：reaction temperature at room temperature. The molar ratio of aniline, （NH4）2S2O8 and sodium dodecyl is 4：4：1, The mole rate of doping AgNO3 is 10%compared with aniline. After agitating 4.5 hours, doping an appropriate amount of formaldehyde into the solution, we have silver-DBSA doped polyaniline. IR spectra of samples showed that signiifcant changes have taken place that appearance and position of peak of samples. The XRD analysis of samples showed that silver-DBSA doped polyaniline has a strong peak of silver metal elements. SEM samples showed that particle size of silver-DBSA doped polyaniline smaller than AgNO3-DBSA doped polyaniline, and there are many silver-white silver particles dispersed in polymer macromolecules. TG thermal analysis of samples show that the silver-DBSA doped polyaniline is stable under 420℃, it indicated good thermal stability of synthetic products. The conductivity of samples that tested by four-probes conducting instrument is about 14 s/cm. So the silver-DBSA doped polyaniline is a promising new material. It was uesed in all printed cicurit and other aspects.