What is it about?

Adhesives either have high but irreversible adhesion strength or reversible but weak in strength. We report a fast and reversible adhesive consisting of dynamic bonds for potential use as a wound dressing adhesive. The film has adhesion strength almost twice that of topical skin adhesive in clinical medicine, but can be easily removed when softened by water. It can adhere on both smooth and hairy surfaces.

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Why is it important?

It is challenging for wound dressing adhesives to realize both fast and strong adhesion yet be readily reversible, especially when the adherend skin surface is soft and hairy. The incorporation of ultrafast and partially activated dynamic covalent bonds offers a new concept for the next generation of wound dressing adhesives.

Perspectives

We had an earlier paper published in PNAS, https://www.pnas.org/doi/10.1073/pnas.1818534116, where we show adaptive contact and switchable mechanical properties are the keys to achieve ultra-high yet reversible mechanical strength. In this paper, we transferred the knowledge into a polymer used in our daily life with dynamic covalent bonds, allowing us to generate similar effects, which opens a new concept in wound dressing.

Shu Yang
University of Pennsylvania

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This page is a summary of: Fast, strong, and reversible adhesives with dynamic covalent bonds for potential use in wound dressing, Proceedings of the National Academy of Sciences, July 2022, Proceedings of the National Academy of Sciences, DOI: 10.1073/pnas.2203074119.
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