Читать книгу Halogen Bonding in Solution - Группа авторов - Страница 40

Select self‐healing polymers employ reversible networks of noncovalent interactions and are of topical interest for several real‐world applications. For example, using halogen bonds in self‐healing polymers allows for the creation of hard coatings with healing properties. The polymers are “repaired” by reorganizing noncovalent interactions to maintain structural and mechanical integrity and can sustain many healing cycles while keeping their mechanical robustness. The first examples of halogen bond self‐healing polymers were developed by Schubert and Hager in 2017 [187,188]. Cross‐linking between iodotriazole and iodotriazolium halogen bond donors and tetra‐N‐butylammonium acetate polymeric salt acceptors (Figure 1.21) in these systems was revealed by a characteristic shift in the C–I band in the Raman spectrum. The self‐healing behavior in these polymers was indicated by scratch‐healing tests. Future studies of self‐healing polymers that incorporate halogen bonding are being directed at maximizing the self‐healing mechanism. Given that there are few examples, the field will likely expand to include a wider variety of self‐healing polymer systems.