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首页> 外文期刊>Journal of Applied Polymer Science >Facile fabrication of polyaniline/polypyrrole copolymer nanofibers with a rough surface and their electrorheological activities
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Facile fabrication of polyaniline/polypyrrole copolymer nanofibers with a rough surface and their electrorheological activities

机译：具有粗糙表面的聚苯胺/聚吡咯共聚物纳米纤维的体面的制造及其电流活性

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摘要

Hierarchical polyaniline/polypyrrole (PANI/PPy) copolymer nanofiber was prepared via a two-step method and adopted as dispersing materials for electrorheological (ER) fluids. The first step was used to synthesize PANI nanofibers by a rapid mixing method. Subsequently, the PANI/PPy copolymer nanofibers with a rough surface were obtained using an in situ polymerization method continuously. The morphology of the resultant PANI/PPy copolymer nanofibers can be controlled by varying the amount of Py monomer in the secondary in situ polymerization method. The rough surface of PANI/PPy copolymer nanofibers were confirmed by scanning electron microscopy and transmission electron microscopy. The diameter of PANI/PPy nanofiber is within the range 100-200 nm. The obtained PANI/PPy copolymer particles all exhibit amorphous structure through X-ray diffraction measurement. We also demonstrated that the hierarchical PANI/PPy copolymer nanofibers exhibited characteristic ER behaviors, which were investigated using a Haake rotational rheometer at various electric field strengths. The ER efficiency e for PANI-1mLPPy and PANI-2mLPPy ER fluids at shear rate 0.1 s(-1) is 36.6 and 28.5 under electric field strength E=3 kV/mm, respectively. Low leaking current density is observed even at high electric field strength and wide plateau region appeared, which show a strong ER activity for the PANI/PPy composite nanofibers. The results also indicate that the PANI/PPy composite particles have distinctly enhanced ER effect compared with the pure PANI and PPy particles under electric stimuli. The significantly improved ER property of PANI/PPy-based ER fluid is ascribed to the enhanced interfacial polarization. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46289.
机译：通过两步法制制备等级聚苯胺/聚吡咯（PANI / PPY）共聚物纳米纤维，并采用用于电流（ER）流体的分散材料。第一步是通过快速混合方法合成Pani纳米纤维。随后，使用原位聚合方法连续获得具有粗糙表面的PANI / PPY共聚物纳米纤维。通过改变次级原位聚合方法中的普型单体的量，可以控制所得PANI / PPY共聚物纳米纤维的形态。通过扫描电子显微镜和透射电子显微镜确认PANI / PPY共聚物纳米纤维的粗糙表面。 PANI / PPY纳米纤维的直径在100-200nm的范围内。通过X射线衍射测量，所获得的PANI / PPY共聚物颗粒均表现出非晶结构。我们还证明了等级Pani / Ppy共聚物纳米纤维表现出特征ER行为，其在各种电场强度下使用Haake旋转流变仪进行研究。对于剪切速率0.1S（-1）的Pani-1mlppy和Pani-2mlppy ER流体的ER效率E分别为36.6和28.5，分别为3 kV / mm。即使在高电场强度下，也观察到低漏电流密度，并且出现宽平台区域，这表明了PANI / PPY复合纳米纤维的强劲AR活性。结果还表明，与电刺激下的纯PANI和PPY颗粒相比，PANI / PPY复合颗粒具有明显增强的ER效应。基于PANI / PPY的ER流体的显着改善的ER性能归因于增强的界面极化。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46289。

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