Paladugu Sri Ram Murthy, Sreekanth P S Rama, Sahu Santosh Kumar, Naresh K, Karthick S Arun, Venkateshwaran N, Ramoni Monsuru, Mensah Rhoda Afriyie, Das Oisik, Shanmugam Ragavanantham
School of Mechanical Engineering, VIT-AP University, Amaravati 522337, India.
Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089, USA.
Materials (Basel). 2022 Nov 29;15(23):8521. doi: 10.3390/ma15238521.
Composites can be divided into three groups based on their matrix materials, namely polymer, metal and ceramic. Composite materials fail due to micro cracks. Repairing is complex and almost impossible if cracks appear on the surface and interior, which minimizes reliability and material life. In order to save the material from failure and prolong its lifetime without compromising mechanical properties, self-healing is one of the emerging and best techniques. The studies to address the advantages and challenges of self-healing properties of different matrix materials are very limited; however, this review addresses all three different groups of composites. Self-healing composites are fabricated to heal cracks, prevent any obstructed failure, and improve the lifetime of structures. They can self-diagnose their structure after being affected by external forces and repair damages and cracks to a certain degree. This review aims to provide information on the recent developments and prospects of self-healing composites and their applications in various fields such as aerospace, automobiles etc. Fabrication and characterization techniques as well as intrinsic and extrinsic self-healing techniques are discussed based on the latest achievements, including microcapsule embedment, fibers embedment, and vascular networks self-healing.
复合材料可根据其基体材料分为三类，即聚合物基、金属基和陶瓷基。复合材料因微裂纹而失效。如果表面和内部出现裂纹，修复过程复杂且几乎不可能实现，这会降低可靠性并缩短材料寿命。为了避免材料失效并在不影响机械性能的情况下延长其使用寿命，自修复是一种新兴的最佳技术之一。针对不同基体材料自修复性能的优势和挑战的研究非常有限；然而，本综述涵盖了所有三类不同的复合材料。自修复复合材料旨在修复裂纹、防止任何受阻的失效并提高结构的使用寿命。它们在受到外力影响后能够自我诊断其结构，并在一定程度上修复损伤和裂纹。本综述旨在提供有关自修复复合材料的最新发展和前景及其在航空航天、汽车等各个领域应用的信息。基于最新成果，讨论了制备和表征技术以及内在和外在自修复技术，包括微胶囊嵌入、纤维嵌入和血管网络自修复。
