Self-healing materials represent a class of substances that are engineered to automatically repair damage without human intervention, effectively addressing the persistent problem of infrastructure deterioration. This self-repair capability is crucial in urban environments where the maintenance of public infrastructure such as roads, bridges, buildings and housing often incurs substantial financial and logistical burdens.
The essence of self-healing materials lies in their ability to initiate a repair process when they sustain damage. This can be achieved through various mechanisms, depending on the material type. For instance, some self-healing concretes contain microcapsules filled with a healing agent, which is released when cracks form, thus triggering a chemical repair process that fills the cracks. Other materials may incorporate vascular systems that mimic biological processes to deliver healing agents to the site of damage. This autonomous repair system not only extends the lifespan of structures but also significantly reduces maintenance costs and enhances safety.
As cities continue to grow, the strain on infrastructure increases, making sustainable and resilient construction methods essential. By integrating self-healing materials into urban infrastructure, cities can become more adaptive and resilient to the physical stresses of modern urban life. This is particularly relevant in the face of climate change, where increased incidents of extreme weather can cause frequent damage to traditional materials.
Furthermore, the adoption of self-repairing materials aligns with the broader goals of sustainable urban development. By reducing the need for frequent repairs and resource-intensive maintenance operations, these materials contribute to lower carbon emissions and less environmental disruption. This technology also supports the vision of smart cities, where infrastructure efficiency and sustainability are critical.
Netherlands · Startup
A spin-off from TU Delft that produces self-healing concrete using limestone-producing bacteria to repair cracks autonomously.
A leading technical university known for research into self-healing asphalt using steel wool and induction heating.
Develops self-healing technologies for high-performance coatings, adhesives, and sealants.
Provides healable and sustainable composite materials.
United States · Company
Manufactures crystalline waterproofing products for concrete that possess self-healing capabilities to seal micro-cracks.
A specialty chemicals company developing admixtures and systems for self-healing and watertight concrete.
Researchers here developed 'Living Concrete' using cyanobacteria, which can reproduce and heal cracks.
A global group that develops and manages sustainable infrastructure solutions, including testing self-healing materials in construction projects.
Global leader in innovative and sustainable building solutions.
Paper
Synergistic effect of cement mortar types and encapsulated healing agents on crack healing in sustained notched concrete beams subjected to flexural loadsScientific Reports · Nov 18, 2025
This study investigates the synergistic effects of different cement mortar types and encapsulated healing agents on repairing cracks in concrete beams, demonstrating significant improvements in structural integrity under flexural loads.
Paper
Development of Self-Healing Polyurethane and Applications in Flexible Electronic Devices: A ReviewMDPI Polymers · Aug 22, 2025
Reviews the development of self-healing polyurethanes and their application in flexible electronic devices, which are essential components of smart city infrastructure.
Article
State of Art Review on Applications and Mechanism of Self-Healing Materials and Structurelink.springer.com
Self-healing materials (SHEM) have extensive characteristics that significantly influence structural and polymeric components’ damage detection and healing behaviour. The composite materials with self-healing capabilities can automatically repair themselves after damage and lessen the economic losses. The present work aims to explore the recent successes in these endeavours from numerous kinds of research published over the last few years and focuses on methodologies/mechanisms, material types, and the excellent abilities of SHEM in various fields. The three objectives of the current article are: (i) to deliberate the motivation behind materials that can either extrinsically or intrinsically heal. (ii) investigate research on self-healing composites, emphasizing several healing systems or mechanisms. (iii) to review the most recent developments and applications of self-healing materials in different sectors. Additionally, some of the classifications, computational methods, and healing efficiency specific to self-healing materials have been reviewed, and the individual comparisons of self-healing techniques are discussed.
Article
An Overview of Self-Healable Polymers and Recent Advances in the Fieldonlinelibrary.wiley.com
The search for materials with better performance, longer service life, lower environmental impact, and lower overall cost is at the forefront of polymer science and material engineering. This has led to the development of self-healing polymers with a range of healing mechanisms including capsular-based, vascular, and intrinsic self-healing polymers. The development of self-healable systems has been inspired by the healing of biological systems such as skin wound healing and broken bone reconstruction. The goal of using self-healing polymers in various applications is to extend the service life of polymers without the need for replacement or human intervention especially in restricted access areas such as underwater/underground piping where inspection, intervention, and maintenance are very difficult. Through an industrial and scholarly lens, this paper provides: a) an overview of self-healing polymers; b) classification of different self-healing polymers and polymer-based composites; c) mechanical, thermal, and electrical analysis characterization; d) applications in coating, composites, and electronics; e) modeling and simulation; and f) recent development in the past 20 years. This review highlights the importance of healable polymers for an economically and environmentally sustainable future, the most recent advances in the field, and current limitations in fabrication, manufacturing, and performance.
Article
New Tech Solves Longstanding Challenges for Self-Healing Materialsnews.ncsu.edu
Engineering researchers have developed a new self-healing composite that allows structures to repair themselves in place, without having to be removed from service. This latest technology resolves two longstanding challenges for self-healing materials, and can significantly extend the lifespan of structural components such as wind-turbine blades and aircraft wings.
Article
Progress and challenges in self-healing composite materialspubs.rsc.org
Synthetic materials used in a wide range of applications are prone to damage in the form of cracking/microcracking. Catastrophic failure of the materials may occur due to the growth and merging of the microcracks, which results in the reduction of the service life of the materials. To avoid these problems and increase the service life, early detection and mending of the microcracks are extremely important. Self-healing materials can be utilized in these cases, which have the capability not only to detect cracks early but also to repair cracks automatically. These materials will also have the potential to improve material reliability, extend the service life, reduce replacement costs, and improve product safety. Due to these attractive features, numerous research studies are conducted every year on the development of self-healing systems. This paper summarizes the latest progress in the design and fabrication techniques of self-healing materials through a wide range of materials, including metals, ceramics, concrete, and polymer composites. Based on recent research, this article provides an overview of different chemistries and approaches involved in preparing self-healing composites. Comparative healing efficiency and related fabrication methods are tabulated. Finally, existing problems, gaps, and challenges, and future research directions and opportunities for commercial applications are highlighted.
Article
Recent Advances In Self-Healing Materialssciencedirect.com
Self-healing material are gaining interest of the researchers in the direction where material can mimic biological process of healing, for an example, healing of wound on skin, reunion of broken bone segment, etc such invincible process of healing, is still a fantasy. Several publications are available on polymer based self-healing composite material compared to other materials like metals, ceramics etc. The self-healing of polymers requires less energy because of weak bond strength compared to metallic bond strength. Self-healing enhances the mechanical properties of materials which can significantly increase the service life of structural or mechanical member. In metallic materials, Self-healing at nano-scale level is limited to crack closer at same scale level only. Once crack is reached a level above nano scale, it tends to grow because of crack coalescence. Disintegrated Melt Deposition technique and Semi Solid Metal processing techniques are discussed to develop Nano SMA based self-healing alloy. In this paper, recent works of self-healing metallic materials have been covered.
Article
A Self-Healing Nanofiber-Based Self-Responsive Time-Temperature Indicator for Securing a Cold-Supply Chainpubmed.ncbi.nlm.nih.gov
Perishable foods at undesired temperatures can generate foodborne illnesses that present significant societal costs. To certify refrigeration succession in a food-supply chain, a flexible, easy-to-interpret, damage-tolerant, and sensitive time-temperature indicator (TTI) that uses a self-healing nanofiber mat is devised. This mat is opaque when refrigerated due to nanofiber-induced light scattering, but becomes irreversibly transparent at room temperature through self-healing-induced interfibrillar fusion leading to the appearance of a warning sign. The mat monitors both freezer (-20 °C) and chiller (2 °C) successions and its timer is tunable over the 0.5-22.5 h range through control of the polymer composition and film thickness. The thin mat itself serves as both a temperature sensor and display; it does not require modularization, accurately measures localized or gradient heat, and functions even after crushing, cutting, and when weight-loaded in a manner that existing TTIs cannot. It also contains no drainable chemicals and is attachable to various shapes because it operates through an intrinsic physical response.
