self healing materials

Self-healing materials can repair damage caused by mechanical wear, thereby extending lifetime of devices. Here, a transparent, self-healing, highly stretchable ionic conductor is presented that autonomously heals after experiencing severe mechanical damage.

recommend more references about this topic: S. van der Zwaag Editor, Self Healing Materials-An Alternative Approach to 20 Centuries of Materials Science. Springer, 2007.  about half of this book talk self healing polymers.