Research progresses in intrinsic self-healing polymer materials

The research status of self-healing polymer was reviewed.Self-healing method in polymer materials includes extrinsic self-healing(nanoparticles self-healing,microcapsules self-healing,hollow-fibers self-healing and microvessels self-healing,et al) and intrinsic self-healing(reversible covalent bond self-healing,reversible non-covalent bond self-healing).Research progress in intrinsic self-healing polymer materials in recent years is summarized.Reversible covalent bond self-healing method realized the function with the help acylhydrazone bond,disulfide-bond,N-O bond and Dieal-Alder reaction in polymer system.Reversible non-covalent bond self-healing method depend on the interaction of hydrogen bond,hydrophobically,static electricity,ionomers,molecular diffusion and metal-ligand.Intrinsic self-healing mechanisms and present research status were elaborated.The potential application fields of smart self-healing materials such as high-rise buildings,nuclear material storage and biology medical material are prospected.