Heal recovery systems

It is noted that in a recent review paper by Hu et al. [8], self-healing using the shape memory effect (SME) has been divided into two categories. One is unconfined shape recovery and the other is confined shape recovery. Rodriguez, Luo, and Mather [52] studied a blend system consisting of a cross-linked poly(e-caprolactone) network (n-PCL) with linear poly(e-caprolactone) (1-PCL) interpenetrating the network, which exhibited a combination of shape memory response from the... 

The self-healing process of this composite system is repeatable because the shape recovery of the SMPFs is repeatable and the thermoplastic parficles can be repeatedly melted and solidified. Figure 7.29 shows the cyclic tensile and thermal induced shape recovery of the SMPFs. 

Jones, A. R., Blaiszik, B. J., White, S. R. and Sottos, N. R. (2013) Full recovery of fiber/ matrix interfacial bond strength using a microencapsulated solvent-based healing system. Composites Science and Technology, 79,1-7. 

Intrinsic healing systems based on supramolecular chemistry also have their value for interfacial bonding restoration despite most of the supramolecular material displaying only moderate mechanical properties. The ureidopyrimidinone unit based materials as described by van Gemert et al. (2012) are not only able to show impressive abilities of recovery for surfaces of coatings but can also be considered for use in mend-able adhesive applications. Moreover, it should be noted that almost all approaches related to healing functionalities of composites discussed later, can be considered as systems healing the interfaces between dissimilar materials. 

Caruso M.M., Blaiszik B.I, White S.R., Sottos N.R. and Moore IS. (2008), Full recovery of fracture toughness using a nontoxic solvent-based self-healing system, Adv. Funct. Mater., 18,1898-1904. 

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