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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Scalable and Low Cost Synthesis of Highly Conducting Polypyrrole Nanofibers Using Oil-Water Interfacial Polymerization under Constant Stirring
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Scalable and Low Cost Synthesis of Highly Conducting Polypyrrole Nanofibers Using Oil-Water Interfacial Polymerization under Constant Stirring

机译：在恒定搅拌下使用油水界面聚合的高导电聚吡咯纳米纤维的可扩展和低成本合成

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摘要

In the present work, we report a low cost and scalable oil-water interfacial polymerization method to synthesize one-dimensional (1-D) highly conducting polypyrrole (PPy) nanofibers doped with p-toluenesulfonic (p-TSA) and hydrochloric (HC1) acids. Polymerization of pyrrole (monomer) has been carried out at the interface formed between the immiscible oil and aqueous water droplets under constant magnetic stirring at room temperature. Formation of smaller diameter (16-20 nm) PPy nanofibers has been confirmed from the high resolution transmission electron microscopy (HRTEM) studies, and the average diameter of p-TSA doped PPy nanofibers is found to be smaller than that of HC1 doped nanofibers. The polymer chain ordering or crystallinity of both p-TSA and HC1 doped PPy nanofibers have been studied with X-ray diffraction (XRD). Studies of Fourier transform infrared (FTIR) spectra suggest the presence of all the characteristic vibration bands in doped PPy nanofibers. The doping of PPy nanofibers has been confirmed from the formation of polaron and bipolaron bands in their UV-vis spectra. The optical band gap energy (E-g) and Urbach energy (E-U) for PPy nanofibers doped with p-TSA and HC1 doped PPy nanofibers were determined from their UV-vis absorption spectra. The red shift of the polaron absorption band in p-TSA doped PPy nanofibers confirms a higher conjugation length of the polymer nanofiber chains than that in the HC1 doped PPy nanofibers. Thermogravimetric (TGA) and derivative plots of TGA studies predict that PPy nanofibers doped with p-TSA are thermally and structurally more stable as compared to HC1 doped PPy nanofibers. Current voltage (I-V) characteristics exhibit nonlinear behavior with voltage in both p-TSA and HCl doped PPy nanofibers.
机译：在本作工作中，我们报告了一种低成本和可伸缩的油水互补聚合方法，以合成掺杂有对甲苯磺（P-TSA）和盐酸（HC1）掺杂掺杂掺杂具有对甲苯磺酸（P-TSA）的高导电聚吡咯（PPY）纳米纤维的一维（1-D）纳米纤维（HC1）酸。在在室温下恒定磁力搅拌下在不混溶的油和水滴之间形成的界面处进行吡咯（单体）的聚合。从高分辨率透射电子显微镜（HRTEM）研究证实了较小直径（16-20nm）PPY纳米纤维的形成，发现P-TSA掺杂PPY纳米纤维的平均直径小于HC1掺杂纳米纤维的平均直径。已经研究了P-TSA和HC1掺杂PPY纳米纤维的聚合物链排序或结晶度，用X射线衍射（XRD）研究。傅里叶变换红外（FTIR）光谱的研究表明掺杂PPY纳米纤维中所有特征振动带的存在。已经从其UV-Vis光谱中形成了PPY纳米纤维的掺杂。从其UV-Vis吸收光谱确定掺杂有P-TSA和HC1掺杂PPY纳米纤维的PPY纳米纤维的光带隙能量（E-G）和URBACH能量（E-U）。 P-TSA掺杂PPY纳米纤维中的极化子吸收带的红色偏移证实了聚合物纳米纤维链的更高的缀合长度，而不是HC1掺杂的PPY纳米纤维中的升值长度。 TGA研究的热重量（TGA）和衍生图预测，与HC1掺杂的PPY纳米纤维相比，掺杂有P-TSA的PPY纳米纤维是热和结构上更稳定的。电流电压（I-V）特性表现出具有P-TSA和HCl掺杂PPY纳米纤维的电压的非线性行为。

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