Redox-responsive self-healing materials formed from host–guest polymers
By Masaki Nakahata, Y. Takashima, H. Yamaguchi, A. Harada. Nature Communications, 2011
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Expanding the useful lifespan of materials is becoming highly desirable, and self-healing and self-repairing materials may become valuable commodities. The formation of supramolecular materials through host–guest interactions is a powerful method to create non-conventional materials. Here we report the formation of supramolecular hydrogels and their redox-responsive and self-healing properties due to host–guest interactions. We employ cyclodextrin (CD) as a host molecule because it is environmentally benign and has diverse applications. A transparent supramolecular hydrogel quickly forms upon mixing poly(acrylic acid) (pAA) possessing β-CD as a host polymer with pAA possessing ferrocene as a guest polymer. Redox stimuli induce a sol−gel phase transition in the supramolecular hydrogel and can control self-healing properties such as re-adhesion between cut surfaces.
Subfields: Biomaterials, Organic Chemistry, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/bdd805fc15b40c3b32e177625db4f9373c46d430
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