基于聚苯胺微胶囊的双重自修复防腐涂层

张青青; 陈亚鑫; 刘仁; 罗静

doi:10.11777/j.issn1000-3304.2022.22404

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基于聚苯胺微胶囊的双重自修复防腐涂层

研究论文 | 更新时间：2024-01-18

- 基于聚苯胺微胶囊的双重自修复防腐涂层
- Dual-action Self-healing Anticorrosive Coating Based on Polyaniline Microcapsules
- 高分子学报 2023年54卷第5期页码：720-730
- 作者机构：
  
  江南大学化学与材料工程学院合成与生物胶体教育部重点实验室无锡 214122
- 作者简介：
  
  E-mail: 8052900170@jiangnan.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 ┣51873080);52273057┫;江苏省青蓝工程和江苏省科技研发(BE2021043)
- DOI：10.11777/j.issn1000-3304.2022.22404
  中图分类号：
- 纸质出版日期：2023-05-20，
  
  网络出版日期：2023-02-03，
  
  收稿日期：2022-11-25，
  
  录用日期：2022-12-30
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张青青,陈亚鑫,刘仁等.基于聚苯胺微胶囊的双重自修复防腐涂层[J].高分子学报,2023,54(05):720-730.

Zhang Qing-qing,Chen Ya-xin,Liu Ren,et al.Dual-action Self-healing Anticorrosive Coating Based on Polyaniline Microcapsules[J].ACTA POLYMERICA SINICA,2023,54(05):720-730.
张青青,陈亚鑫,刘仁等.基于聚苯胺微胶囊的双重自修复防腐涂层[J].高分子学报,2023,54(05):720-730. DOI： 10.11777/j.issn1000-3304.2022.22404.

Zhang Qing-qing,Chen Ya-xin,Liu Ren,et al.Dual-action Self-healing Anticorrosive Coating Based on Polyaniline Microcapsules[J].ACTA POLYMERICA SINICA,2023,54(05):720-730. DOI： 10.11777/j.issn1000-3304.2022.22404.

摘要

将乳液模板法、光聚合法以及苯胺的界面聚合相结合制备了负载亚麻籽油的聚苯胺微胶囊，并将微胶囊与水性环氧树脂涂层相结合来构筑了具有优异光热转化能力的双重自修复防腐涂层. 当涂层受损后，微胶囊中的自修复剂亚麻籽油释放出来，对涂层进行修复；在近红外光(NIR)的照射下，聚苯胺可以有效地吸收光能并将其转化为热能，使涂层的温度高于其玻璃化转变温度，涂层破损处实现愈合. 聚苯胺微胶囊的加入不仅赋予涂层优异的自修复能力，而且大大增强了其防腐能力. 涂层的表面形貌、电化学与盐雾测试结果表明，聚苯胺微胶囊添加量为10%的涂层在NIR照射3 s内，可以实现快速闭合，恢复了其阻隔性能. 此外，在300 h的盐雾测试后，涂层未产生任何的腐蚀产物，而纯涂层可以明显看到腐蚀现象. 这种双重自修复防腐涂层的超快响应时间和高愈合效率以及优异的防腐性能具有潜在的应用价值.

Abstract

Smart coatings are ideal for the next generation of anti-corrosion coatings with excellent self-healing and anti-corrosion capabilities

which can repair coating scratches in a timely and autonomous manner. In this work

polyaniline microcapsules loaded with linseed oil were prepared

via

combining emulsion template method

photopolymerization and interfacial polymerization of aniline. The microcapsules were incorporated into water-based epoxy resin coating to construct a dual self-healing anti-corrosion coating with excellent photothermal conversion ability. When coating was damaged

the repair agent (linseed oil) in microcapsules was released to repair the scratch. Under near-infrared (NIR) light irradiation

polyaniline could effectively absorb light energy and generate sufficient heat

which raise the temperature above the glass transition temperature (

) and thus heal the coating defect. Polyaniline could not only improve the excellent photothermal conversion capability of the coating

but also greatly enhance its anticorrosion ability. Infrared thermal imager recorded the temperature change of the coating under NIR illumination and determined the photothermal conversion performance of the coating. The surface morphology

electrochemical measurement and salt spray test results proved that the coating with 10% polyaniline microcapsule presented an excellent self-healing performance within 3 s of NIR irradiation. In addition

after 300 h of salt spray test

no corrosion products were produced by the coating

while the corrosion phenomenon was obvious in the epoxy coating. EIS measurements results show that the |

=0.01Hz

value of the Polyaniline microcapsules coating after repair was nearly 4 orders of magnitude different from the |

=0.01Hz

value of the pure epoxy coating. The triple synergistic effect of the release of the repair agent in the microcapsule

the photothermal effect of polyaniline and its anticorrosive ability makes the coating have ultra-fast healing time

excellent self-healing ability and anticorrosive effect. The ultra-fast response time and high healing efficiency

as well as excellent corrosion protection properties endow this coating with promising applications in anti-corrosion field.

关键词

微胶囊聚苯胺光热双重自修复防腐

Keywords

MicrocapsulePolyanilinePhotothermalDouble-action self-healingCorrosion protection

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