High-performance self-healing epoxy by microencapsulated epoxy-amine chemistry I: Properties of the adopted healant system

IF 3.9 3区化学 Q2 POLYMER SCIENCE

Journal of Polymer Science Pub Date : 2024-09-18 DOI:10.1002/pol.20240588

Mengzhang Zhu, Kaibin Xiao, He Zhang

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Abstract

The adopted healant has a significant impact on the final healing performance of self-healing materials. Herein, the healant system, bisphenol-F diglycidyl ether (BFDGE) and polytheramine JEFFAMINE T403, which possesses the capability of fully healing at room temperature (RT) for epoxy, was investigated in depth. The healing potential of this healant system and its healing benchmark after microencapsulation were systematically studied using a manual injecting method. It shows that the maximum and benchmark healing efficiencies respectively reach about 210% and 170% at RT for 48 h. The robustness of the cured healant was checked by studying the mechanical properties of BFDGE/T403. It verified that the tensile properties of the healant are stable after RT curing for 48 h. The curing degree of the healant was further characterized using differential scanning calorimetry by measuring the residual exotherm. It reaches 90% when the maximum healing performance is achieved and stabilizes at 95% thereafter. The results from the manually healing test, the tensile test, and the DSC test, are consistent with each other, which validate the robustness of BFDGE/T403 as healant for self-healing epoxies.

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微胶囊环氧胺化学高性能自愈合环氧树脂 I：所采用的愈合剂体系的特性

所采用的愈合剂对自愈合材料的最终愈合性能具有重要影响。本文深入研究了双酚-F 二缩水甘油醚（BFDGE）和聚醚胺 JEFFAMINE T403 这种在室温（RT）下对环氧树脂具有完全愈合能力的愈合剂体系。采用手动注射方法，系统研究了这种愈合剂体系的愈合潜力及其微胶囊化后的愈合基准。通过研究 BFDGE/T403 的机械性能，检验了固化愈合剂的坚固性。使用差示扫描量热法测量残余放热，进一步确定了愈合剂的固化程度。当达到最大愈合性能时，它达到 90%，之后稳定在 95%。手动愈合试验、拉伸试验和 DSC 试验的结果相互一致，验证了 BFDGE/T403 作为自愈合环氧树脂愈合剂的稳定性。

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来源期刊

Journal of Polymer Science POLYMER SCIENCE-

CiteScore

6.30

自引率

5.90%

发文量

264

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology.