Advances in Self‐Healing Polymers: Mechanisms, Applications, and Future Perspectives

Abstract Advanced materials called self‐healing polymers are made to replicate biological processes and fix damage on their own. These polymers solve important issues with performance, sustainability, and durability in a range of applications. Their processes can be roughly divided between extrinsic systems, which use external agents, and intrinsic systems, which rely on reversible chemical connections (covalent or supramolecular). Their mechanical and functional qualities have been improved by recent developments such as dynamic covalent bonding, shape‐memory materials, and nanotechnology. These polymeric materials have a variety of uses, including enhanced safety and longevity in aerospace by fixing cracks in structural elements. They are used in biomedicine for implanted devices, hydrogels, and tissue engineering because they are biocompatible and have the ability to repair themselves dynamically. Self‐healing technologies help renewable energy systems by making solar panels and wind turbine blades more durable. These materials allow for the creation of robust and adaptable structures using 3D printing. It is anticipated that cutting‐edge technologies like artificial intelligence and nanotechnology will further enhance self‐healing mechanisms, opening the door for sustainable, multipurpose materials. In material science, self‐healing polymers have revolutionary potential to address the increasing need for creative, long‐lasting, and environmentally friendly solutions.