以苯胺为单体,过硫酸铵为氧化剂,采用无模板直接混合法制备了对甲苯磺酸/硫酸复合酸掺杂的导电聚苯胺纳米纤维。研究了对甲苯磺酸用量对合成掺杂聚苯胺的产率、溶解性能以及导电性能的影响,并通过四探针、扫描电镜(SEM)、红外光谱以及紫外光谱测试技术,对掺杂态聚苯胺进行了研究与表征。研究结果表明,室温下对甲苯磺酸和硫酸的摩尔比为0.3∶1时,掺杂态的聚苯胺产率、电导率以及溶解率达到最大值,其中产率为148.25%,电导率可达3.33 S/cm-1,在氮甲基吡咯烷酮(NMP )中溶解率为62.6%。通过扫描电镜可以看出,复合酸掺杂形成的聚苯胺纳米纤维长度可达200~500 nm 且粗细均匀。紫外光谱以及红外光谱都表明了复合酸掺杂的有效性。
Polyaniline (PANI)nanofibers were synthesized in compound acids aqueous solution by direct mix oxi-dation polymerization with aniline as monomer and ammonium persulfate as oxidant.The properties of the syn-thesized polyaniline were studied and characterized by four-probe,scanning electron microscopy (SEM),FT-IR spectra and UV-Vis spectra.The results show that,at the room temperature,the mol concentration ratio of P-toluenesulfonic acid(TSA)to sulfuric acid (H2 SO4 )was 0.3∶1,both the conductivity and the solubility (in NMP)of the synthesized doped polyaniline reach their maximum which was 3.33 S/cm and 62.6% in NMP,re-spectively.The length of the nanofibers can be tuned from 200 nm to 500 nm using mixed acidas observed via scanning electronmicroscopy.The FT-IR spectra and UV-Vis spectra show the effectiveness of the mixed acid doping.
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