3D Printing of Self‐Healing Materials

This review article presents a comprehensive overview of the latest advances in the field of 3D printable structures with self‐healing properties. Three‐dimensional printing (3DP) is a versatile technology that enables the rapid manufacturing of complex geometric structures with precision and functionality not previously attainable. However, the application of 3DP technology is still limited by the availability of materials with customizable properties specifically designed for additive manufacturing. The addition of self‐healing properties within 3D printed objects is of high interest as it can improve the performance and lifespan of structural components, and even enable the mimicking of living tissues for biomedical applications, such as organs printing. The review will discuss and analyze the most relevant results reported in recent years in the development of self‐healing polymeric materials that can be processed via 3D printing. After introducing the chemical and physical self‐healing mechanism that can be exploited, the literature review here reported will focus in particular on printability and repairing performances. At last, actual perspective and possible development field will be critically discussed. This review article critically summarizes the recent literature on 3D printable materials and structures with self‐healing characteristics, emphasizing the intimate relationship between chemical and physical properties and printability, toward the design and fabrication of advanced components. Moreover, it highlights actual applications, envisaging future directions of investigation.