Self-healing and recovery of functionality in materials

The concept of self-healing was first clearly proven using extrinsic healing approaches to restore structural integrity (White et al, 2001) and thus it is in 

6 Healing functionalities as evaluated by several techniques, (a) toughness recovery (Caruso, 2008) (b) impact strength recovery (Yao, 2011) (c) fatigue resistance recovery (Yuan, 2011) (d) corrosion protection recovery (Garcia, 2011) (e) electrical conductivity recovery (Odom, 2012) and (f) hydrophobicity recovery (Liu, 2012). 

2 Recovering surface aesthetics, barrier and corrosion protection 

The recovery of surface aesthetics, barrier and corrosion protection can be mainly, though not uniquely, linked to the field of coatings science, and thus it is in these fields where most of the approaches and studies have been 

Both extrinsic and intrinsic approaches have been employed to restore barrier and corrosion protection. Several works can be found in the 

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