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Home  > Raw materials & technologies  > Technologies  > Functional coatings  > Self-healing polyurethane containing carbo...

Friday, 15 December 2017
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Raw materials & technologies, Technologies, Functional coatings

Self-healing polyurethane containing carboxyl groups

Wednesday, 6 December 2017

Self-healing polymer is a kind of intelligent material with the capability to repair damage automatically. In a paper, a type of polyurethane containing carboxyl groups is reported that demonstrates thermally assisted healing effects.

Self-healing polyurethane containing carboxyl groups. Source: detailblick-foto - Fotolia.com

Self-healing polyurethane containing carboxyl groups. Source: detailblick-foto - Fotolia.com

This polymer can be healed even 72 h after cutting and also has a repeatable healing property.

Hydrogen bonding interactions

The self-healing efficiency can reach 90% when comparing the tensile strength of the healed sample to the original sample. Carboxyl content plays an important role in the self-healing property – polyurethane with no carboxyl groups cannot be healed. The mechanism of self-healing showed that hydrogen bonding interactions between carboxyl groups and diffusion of poly(ethylene glycol) chains contribute to the self-healing behaviour.

The study is published in: Applied Polymer Science, Volume 135, Issue 9, March 5, 2018

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