Abstract

Composites are used in a variety of applications due to their excellent properties. However, structural polymers are sensitive and susceptible to thermal and mechanical damage in form of micro-cracks, which are onset to grow deep within the structure where detection and repair are practically impossible. To overcome these problems, broad range of self-healing structures have emerged. This technology has led to an increase in the material’s lifetime and safety while reducing the repair and replacement costs. Capsule-based healing systems are a well-known technology that has many uses in smart protective coatings, dental composites, concrete components, and generally for polymer and fiber-reinforced composites. This article summarizes the research work on the capsule-based self-healing system over the last two decades. In this regard, after a brief introduction, various types of microencapsulation-based methods used in healing systems are classified. After explaining the manufacturing process of capsules, parameters affecting the microencapsulation quality particularly, agitation rate, core to shell weight ratio, monomer viscosity, solvent property, reaction time, temperature, pH, and U/F ratio are explained in detail. Finally, the most common healing efficiency evaluation methods are described. This review provides the reader with an overview of achievements to date, and insight into future development for industrial and engineering applications.

摘要

复合材料由于其优异的性能而被用于多种应用。但是，结构聚合物很敏感，并且容易受到微裂纹形式的热和机械损伤的影响，微裂纹开始在结构内深入生长，而实际上不可能进行检测和修复。为了克服这些问题，出现了各种各样的自我修复结构。这项技术导致材料的使用寿命和安全性提高，同时降低了维修和更换成本。基于胶囊的愈合系统是一项众所周知的技术，在智能防护涂料，牙科复合材料，混凝土组件中通常有很多用途，并且通常用于聚合物和纤维增强的复合材料。本文总结了近二十年来基于胶囊的自我修复系统的研究工作。在这方面，在简要介绍之后，对用于康复系统的各种类型的基于微囊化的方法进行了分类。在解释了胶囊的制造过程之后，详细说明了影响微胶囊质量的参数，特别是搅拌速率，核壳重量比，单体粘度，溶剂性质，反应时间，温度，pH和U / F比。最后，介绍了最常用的愈合效率评估方法。这篇评论为读者提供了迄今为止取得的成就的概述，并深入了解了工业和工程应用的未来发展。详细说明搅拌速率，核壳重量比，单体粘度，溶剂性能，反应时间，温度，pH和U / F比。最后，介绍了最常用的愈合效率评估方法。这篇评论为读者提供了迄今为止取得的成就的概述，并深入了解了工业和工程应用的未来发展。详细说明搅拌速率，核壳重量比，单体粘度，溶剂性能，反应时间，温度，pH和U / F比。最后，介绍了最常用的愈合效率评估方法。这篇评论为读者提供了迄今为止取得的成就的概述，并深入了解了工业和工程应用的未来发展。