Influence of the aniline concentration on the morphology and property of polyaniline nanotubes and their polymerization mechanism

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2024-04-16 DOI:10.1177/09540083241246499

Shengqing Jiao, Yanmin Wang, Yuansong Xiao, Yongqin Han, Tingxi Li, Yong Ma

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引用次数: 0

Abstract

Polyaniline is a kind of polymer material with excellent electrochemical performance, and it stands out among a number of conductive polymer materials owing to its low cost, easy availability of raw materials, and excellent physical and chemical properties. However, the poor processability of polyaniline impedes its broad application. Preparing nanosized structure and introducing big molecular organic acids as dopant are practical strategies to solve this problem. Here using ammonium persulfate as oxidant, sodium dodecyl sulfate as surfactant, and 3,5-dinitrobenzoic acid as doping acid, polyaniline nanotubes were successfully prepared via emulsion polymerization method and characterized by various measurements. The influence of aniline concentration on the morphology and property of the product was explored. The polymerization mechanism of polyaniline nanotubes was discussed in detail based on the analysis of the microscopic morphology. As the concentration of aniline monomer increases, the position of the characteristic absorption peak in the infrared spectrum of the polyaniline main chain remains almost unchanged, but the ratio of benzene to quinone gradually increases. Along with the increasing aniline concentration, the crystallinity of polyaniline gradually decreases from 56.21% to 40.37%. In addition, the optimal conductivity is 2.05×10−2 S/cm when the concentration of aniline monomer is 0.5 mol/L.

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苯胺浓度对聚苯胺纳米管形态和性能及其聚合机理的影响

聚苯胺是一种具有优异电化学性能的高分子材料，因其成本低、原材料易得、物理化学性能优异，在众多导电高分子材料中脱颖而出。然而，聚苯胺的加工性较差，阻碍了它的广泛应用。制备纳米结构和引入大分子有机酸作为掺杂剂是解决这一问题的实用策略。本文以过硫酸铵为氧化剂，十二烷基硫酸钠为表面活性剂，3,5-二硝基苯甲酸为掺杂酸，通过乳液聚合法成功制备了聚苯胺纳米管，并通过各种测量方法对其进行了表征。探讨了苯胺浓度对产品形态和性能的影响。在分析微观形貌的基础上，详细讨论了聚苯胺纳米管的聚合机理。随着苯胺单体浓度的增加，聚苯胺主链红外光谱中特征吸收峰的位置几乎保持不变，但苯与醌的比例逐渐增加。随着苯胺浓度的增加，聚苯胺的结晶度从 56.21% 逐渐降低到 40.37%。此外，当苯胺单体浓度为 0.5 摩尔/升时，最佳电导率为 2.05×10-2 S/cm。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Performance Polymers 化学-高分子科学

CiteScore

4.20

自引率

14.30%

发文量

106

审稿时长

1.2 months

期刊介绍： Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.