Abstract Microcapsule-based self-healing polymer has been demonstrated its potential application in various aspects, because their automatically repairing property endows the material with a longer lifetime. However, the limited number of healing times restricts the development of microcapsule-based self-healing system. Herein, a hierarchical microcapsule with multi-storage cells (HMMC) was designed and fabricated by an efficient in-situ polymerization strategy, which could repeatable release active agents to repair cracks in the same region. In this strategy, synthesis microcapsule-type stabilizers (MTS) with healing agent (dicyclopentadiene, DCPD) were used as stabilizers of Pickering emulsion to prepare HMMC by thiol-isocyanate click reaction. It was shown that HMMC exhibited a hierarchical structure with a central capsule covered by a layer of MTS. Thermogravimetric analysis (TGA) showed the core content of HMMCs was 51.52 %. Nuclear magnetic resonance (NMR) spectra and Fourier transform infrared (FTIR) spectra proved that the active DCPD was successfully encapsulated in each storage cells of HMMCs. The repeatable self-healing property was demonstrated by Electrochemical (EIS) and anticorrosion experiments.

中文翻译：

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用于可重复自愈的多存储单元分层微胶囊的制备和表征

摘要 基于微胶囊的自修复聚合物已被证明其在各个方面的潜在应用，因为它们的自动修复特性赋予材料更长的使用寿命。然而，有限的愈合次数限制了基于微胶囊的自愈合系统的发展。在此，通过有效的原位聚合策略设计和制造了具有多存储细胞（HMMC）的分级微胶囊，该微胶囊可以重复释放活性剂以修复同一区域的裂缝。在该策略中，合成微胶囊型稳定剂（MTS）与愈合剂（双环戊二烯，DCPD）作为Pickering乳液的稳定剂，通过硫醇-异氰酸酯点击反应制备HMMC。结果表明，HMMC 表现出分层结构，中央胶囊被一层 MTS 覆盖。热重分析 (TGA) 显示 HMMCs 的核心含量为 51.52%。核磁共振 (NMR) 光谱和傅里叶变换红外 (FTIR) 光谱证明活性 DCPD 成功地封装在 HMMC 的每个存储单元中。电化学（EIS）和防腐实验证明了可重复的自愈特性。