Abstract

In this study, composites based on poly(o-ethoxyaniline), POEA, and its composites grafted with functionalized multiwalled carbon nanotubes (MWCNT) were obtained by the oxidative in situ chemical polymerization varying the mass ratio of o-ethoxyaniline:MWCNT of 100:1 and 100:5. POEA and its POEA-MWCNT grafted composites were used to prepare self-assembled (SA) deposited onto indium tin oxide (ITO) substrates with alternating layers of polystyrene sulfonate (PSS). The structure and morphology of the samples were characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The SA films were characterized by cyclic voltammetry, UV–Vis and electrochemical impedance spectroscopy (EIS). The EIS results showed expressive decrease of the polarization resistance (R_p), from 13,342 Ω, for POEA/PSS, to 568 Ω for POEA-MWCNT(100:1)/PSS (about 23 times lower) and to 240 Ω for POEA-MWCNT(100:5)/PSS film. Considering that higher mass proportions of MWCNT can affect the final morphology and the oxidation ratio of POEA chains and aiming strong interactions between the POEA and MWCNT as well the significant reduction of charge transfer resistance, the SA film POEA-MWCNT(100:1)/PSS has potential for future applications as sensors and charge storage devices.

Graphic Abstract

中文翻译：

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功能化多壁碳纳米管接枝的聚邻乙氧基苯胺自组装膜

摘要

在这项研究中，复合材料基于聚（ø -ethoxyaniline），POEA，及其复合材料与官能化多壁碳纳米管（MWCNT）接枝采用原位化学聚合不同的质量比氧化得到ø 100 MWCNT：-ethoxyaniline： 1和100：5。POEA及其POEA-MWCNT接枝的复合材料用于制备自组装（SA），沉积在具有交替的聚苯乙烯磺酸盐（PSS）层的氧化铟锡（ITO）基材上。用傅里叶变换红外光谱和扫描电镜对样品的结构和形貌进行表征。SA膜通过循环伏安法，UV-Vis和电化学阻抗谱（EIS）进行表征。EIS结果表明，极化电阻明显降低（R _p），从POEA / PSS的13,342Ω，到POEA-MWCNT（100：1）/ PSS（低约23倍）的568Ω，以及POEA-MWCNT（100：5）/ PSS膜的240Ω。考虑到较高质量分数的MWCNT会影响POEA链的最终形态和氧化率，并针对POEA和MWCNT之间的强相互作用以及电荷转移阻力的显着降低，因此SA膜POEA-MWCNT（100：1）/ PSS有潜力作为传感器和电荷存储设备的未来应用。

图形摘要