Improving self-healing characteristics of polyurethane composite coatings by surface modification of polyaniline using dodecylamine

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2025-04-21 DOI:10.1016/j.engfailanal.2025.109624

Shoaib Ahmad , Muddasir Nawaz , Solaiman Mohammad , Noora Al-Qahtani , Ramazan Kahraman , Bilal Mansoor , R.A. Shakoor

{"title":"Improving self-healing characteristics of polyurethane composite coatings by surface modification of polyaniline using dodecylamine","authors":"Shoaib Ahmad , Muddasir Nawaz , Solaiman Mohammad , Noora Al-Qahtani , Ramazan Kahraman , Bilal Mansoor , R.A. Shakoor","doi":"10.1016/j.engfailanal.2025.109624","DOIUrl":null,"url":null,"abstract":"<div><div>Corrosion is one of the most critical problems affecting the structural integrity of metals. Polymeric nanocomposite coatings reinforced with anti-corrosive pigments are currently being used to mitigate corrosion. This study involves the synthesis of polyaniline (PANI) nanoparticles and their modification with dodecylamine (DOC), which functions as acorrosion inhibitor. Polyurethane coatings (PU-PANI@DOC) were developed by incorporating modified nanoparticles (PANI@DOC) into the polyurethane matrix, and blank polyurethane coatings (PU-blank) were prepared without any nanoparticles. Fourier-transform infrared spectroscopy (FTIR), Transmission electron microscopy, and Scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDX) analysis confirmed the successful modification of dodecylamine (DOC) with the surface of polyaniline (PANI) nanoparticles. The electrochemical impedance spectroscopy (EIS) and salt spray test (SST) revealed that the impedance values of the modified coating follow an inclined trend (10<sup>10</sup> Ω.cm<sup>2</sup>) in comparison with PU-blank coatings (10<sup>7</sup> Ω.cm<sup>2</sup>) after the 14thday ofimmersion in 3.5 wt% NaCl. Moreover, the hydrophobic characteristics of PANI@DOC nanoparticles shift the contact angle from 60<em>°</em> to 90<em>°</em>, thus lowering the wettability nature of modified coatings. Overall, Polyurethane coatings (PU-PANI@DOC) exhibiting potential attributes such as barrier properties, hydrophobic nature, inhibition effect, and high compatibility with polyurethane matrix can be a suitable material for the development of smart self-healing coatings to protect the metals from the hostile effects of corrosion<em>.</em></div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"176 ","pages":"Article 109624"},"PeriodicalIF":4.4000,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Engineering Failure Analysis","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1350630725003656","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Corrosion is one of the most critical problems affecting the structural integrity of metals. Polymeric nanocomposite coatings reinforced with anti-corrosive pigments are currently being used to mitigate corrosion. This study involves the synthesis of polyaniline (PANI) nanoparticles and their modification with dodecylamine (DOC), which functions as a corrosion inhibitor. Polyurethane coatings (PU-PANI@DOC) were developed by incorporating modified nanoparticles (PANI@DOC) into the polyurethane matrix, and blank polyurethane coatings (PU-blank) were prepared without any nanoparticles. Fourier-transform infrared spectroscopy (FTIR), Transmission electron microscopy, and Scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDX) analysis confirmed the successful modification of dodecylamine (DOC) with the surface of polyaniline (PANI) nanoparticles. The electrochemical impedance spectroscopy (EIS) and salt spray test (SST) revealed that the impedance values of the modified coating follow an inclined trend (10¹⁰ Ω.cm²) in comparison with PU-blank coatings (10⁷ Ω.cm²) after the 14th day of immersion in 3.5 wt% NaCl. Moreover, the hydrophobic characteristics of PANI@DOC nanoparticles shift the contact angle from 60° to 90°, thus lowering the wettability nature of modified coatings. Overall, Polyurethane coatings (PU-PANI@DOC) exhibiting potential attributes such as barrier properties, hydrophobic nature, inhibition effect, and high compatibility with polyurethane matrix can be a suitable material for the development of smart self-healing coatings to protect the metals from the hostile effects of corrosion.

查看原文本刊更多论文

用十二胺对聚苯胺进行表面改性，提高聚氨酯复合涂料的自愈性能

腐蚀是影响金属结构完整性的关键问题之一。用抗腐蚀颜料增强聚合物纳米复合涂层目前被用于减轻腐蚀。本研究涉及聚苯胺（PANI）纳米粒子的合成及其与十二烷基胺（DOC）的改性，作为一种缓蚀剂。在聚氨酯基体中加入改性纳米粒子（PANI@DOC）制备聚氨酯涂料（PU-PANI@DOC），制备不含纳米粒子的空白聚氨酯涂料（PU-blank）。傅里叶变换红外光谱（FTIR）、透射电子显微镜（tem）和扫描电子显微镜（SEM/EDX）分析证实，聚苯胺（PANI）纳米颗粒表面成功修饰了十二烷基胺（DOC）。电化学阻抗谱（EIS）和盐雾测试（SST）表明，在3.5 wt% NaCl中浸泡第14天后，改性后涂层的阻抗值与pu空白涂层（107 Ω.cm2）相比呈倾斜趋势（1010 Ω.cm2）。此外，PANI@DOC纳米颗粒的疏水特性使接触角从60°变为90°，从而降低了改性涂层的润湿性。总的来说，聚氨酯涂料（PU-PANI@DOC）表现出潜在的属性，如屏障特性、疏水性、抑制作用以及与聚氨酯基体的高相容性，可以成为开发智能自修复涂层的合适材料，以保护金属免受腐蚀的不利影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.