Self-healing Coatings Based on Epoxy Vitrimers

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Macromolecular Materials and Engineering Pub Date : 2025-04-29 DOI:10.1002/mame.202500005

Angela Marotta, Fabio Scherillo, Giovanni Filippone, Martina Salzano de Luna, Veronica Ambrogi

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Abstract

The present study focuses on the development of epoxy-based vitrimeric coatings with thermal-healing ability. For this purpose, ethylene glycol diglycidyl ether (EG) is crosslinked with methyl nadic anhydride (MNA) in the presence of 1-methylimidazole (1-MI) as initiator. The heat-induced reprocessability enabled by transesterification-based bond exchange reactions is evaluated by stress relaxation tests as a function of the epoxide/anhydride ratio and the addition of a transesterification catalyst, namely triazobicyclodecene (TBD). The results show that the relaxation process can be accelerated by both TBD and epoxy excess. Furthermore, due to their low viscosity values, the epoxy-based formulations can be easily applied to the substrate using standard deposition techniques and without the aid of solvents or high temperatures. Therefore, the produced epoxy vitrimers are able to provide extended service life while maintaining good protective performance and self-repairability, opening up possibilities for large-scale applications as coatings.

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基于环氧玻璃体的自修复涂料

本研究的重点是开发具有热愈合能力的环氧基玻璃体涂料。为此，乙二醇二甘油酯醚（EG）在1-甲基咪唑（1-MI）作为引发剂的存在下与甲基酸酐（MNA）交联。通过应力松弛试验评估了基于转酯化的键交换反应的热诱导再加工性，该再加工性是环氧化物/酸酐比率和转酯化催化剂（即三偶氮双环二烯）的添加的函数。结果表明：TBD和过量的环氧树脂均能加速弛豫过程；此外，由于其低粘度值，环氧基配方可以很容易地应用于基材使用标准沉积技术，而无需溶剂或高温的帮助。因此，所生产的环氧玻璃体能够提供更长的使用寿命，同时保持良好的保护性能和自修复性，为涂料的大规模应用开辟了可能性。

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来源期刊

Macromolecular Materials and Engineering 工程技术-材料科学：综合

CiteScore

7.30

自引率

5.10%

发文量

328

审稿时长

1.6 months

期刊介绍： Macromolecular Materials and Engineering is the high-quality polymer science journal dedicated to the design, modification, characterization, processing and application of advanced polymeric materials, including membranes, sensors, sustainability, composites, fibers, foams, 3D printing, actuators as well as energy and electronic applications. Macromolecular Materials and Engineering is among the top journals publishing original research in polymer science. The journal presents strictly peer-reviewed Research Articles, Reviews, Perspectives and Comments. ISSN: 1438-7492 (print). 1439-2054 (online). Readership:Polymer scientists, chemists, physicists, materials scientists, engineers Abstracting and Indexing Information: CAS: Chemical Abstracts Service (ACS) CCR Database (Clarivate Analytics) Chemical Abstracts Service/SciFinder (ACS) Chemistry Server Reaction Center (Clarivate Analytics) ChemWeb (ChemIndustry.com) Chimica Database (Elsevier) COMPENDEX (Elsevier) Current Contents: Physical, Chemical & Earth Sciences (Clarivate Analytics) Directory of Open Access Journals (DOAJ) INSPEC (IET) Journal Citation Reports/Science Edition (Clarivate Analytics) Materials Science & Engineering Database (ProQuest) PASCAL Database (INIST/CNRS) Polymer Library (iSmithers RAPRA) Reaction Citation Index (Clarivate Analytics) Science Citation Index (Clarivate Analytics) Science Citation Index Expanded (Clarivate Analytics) SciTech Premium Collection (ProQuest) SCOPUS (Elsevier) Technology Collection (ProQuest) Web of Science (Clarivate Analytics)