An Easily Accessible Self-Healing Transparent Film Based on a 2D Supramolecular Network of Hydrogen-Bonding Interactions between Polymeric Chains

Nabarun Roy, Željko Tomović, Eric Buhler, Jean Marie Lehn

Research output: Contribution to journalArticleAcademicpeer-review

17 Citations (Scopus)

Abstract

Self-healing polymers hold great promise for the future, enhancing in particular the longevity of polymeric materials. We describe a self-healing covalent polymer, presenting an extensive array of hydrogen-bonding sites based on the combination of urea, urethane, and bis-acyl-hydrazine units. Solvent-cast thin-films prepared by polycondensation of a commercially available dihydrazide and a diisocyanate prepolymer exhibited excellent room temperature autonomous healing with almost full recovery of mechanical properties when two parts of a cut film were overlapped and gently pressed together. This autonomous healing upon damage may be attributed to the supramolecular dynamics of multiple lateral inter-chain hydrogen-bonding interactions between the polymer chains. The solid-state structure of a model compound incorporating the same structural backbone corroborates the existence of an extensive two-dimensional supramolecular hydrogen-bonding network.

Original languageEnglish
Pages (from-to)13513-13520
Number of pages8
JournalChemistry : A European Journal
Volume22
Issue number38
DOIs
Publication statusPublished - 2 May 2016
Externally publishedYes

Keywords

  • hydrogen bonds
  • mechanical properties
  • polymers
  • self-assembly
  • supramolecular chemistry

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