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首页> 外文期刊>Journal of Applied Polymer Science >Protective Properties of PPy-Au Nanocomposite Coatings Prepared by Sonoelectrochemisty and Optimized by the Taguchi Method
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Protective Properties of PPy-Au Nanocomposite Coatings Prepared by Sonoelectrochemisty and Optimized by the Taguchi Method

机译：声电化学法制备和Taguchi法优化的PPy-Au纳米复合涂层的保护性能

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摘要

The polypyrrole (PPy) and polypyrrole-Au (PPy-Au) nanocomposite films have been sonoelectrochemically synthesized on St-12 steel electrodes using the galvanostatic technique. Experimental design according to the Taguchi method has been applied to optimize the factors on the synthesis of PPy-Au nanocomposite coating. Three factors were used to design an orthogonal array L9: Synthesis time (t), Current density (I), and Concentration of HAuCl_4 (C). The synthesized Au nanoparticles during polymerization were characterized by Ultraviolet–visible (UV-visible) spectroscopy. Characterization of the surfaces was done by scanning electron microscope (SEM), energy dispersive X-ray spectrum (EDX), and atomic force microscope (AFM). The scanning electron microscopy (SEM) image of PPy shows a smooth surface while PPy-Au nanocomposite film has a compact morphology. Moreover, energy dispersive X-ray spectrum (EDX) is evidence for the incorporation of Au nanoparticles. The corrosion protection of coatings was investigated by open circuit potential (OCP) time trends, potentiodynamic polarization technique, and electrochemical impedance spectroscopy (EIS) in a NaCl 3.5% solution.
机译：聚吡咯（PPy）和聚吡咯-Au（PPy-Au）纳米复合膜已通过恒电流技术在St-12钢电极上进行了声电化学合成。根据Taguchi方法进行的实验设计已被用于优化PPy-Au纳米复合涂层合成的因素。使用三个因素来设计正交阵列L9：合成时间（t），电流密度（I）和HAuCl_4的浓度（C）。聚合过程中合成的金纳米颗粒通过紫外-可见（UV-可见）光谱进行表征。通过扫描电子显微镜（SEM），能量色散X射线光谱（EDX）和原子力显微镜（AFM）对表面进行表征。 PPy的扫描电子显微镜（SEM）图像显示出光滑的表面，而PPy-Au纳米复合膜具有紧凑的形态。此外，能量色散X射线光谱（EDX）是金纳米粒子掺入的证据。通过在3.5％NaCl溶液中的开路电位（OCP）时间趋势，恒电位极化技术和电化学阻抗谱（EIS）研究了涂层的腐蚀防护。

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