Revisiting the adhesion mechanism of mussel-inspired chemistry

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Chao Zhang
  • Li Xiang
  • Jiawen Zhang
  • Chang Liu
  • Zuankai Wang
  • And 2 others
  • Hongbo Zeng
  • Zhi-Kang Xu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)1698-1705
Journal / PublicationChemical Science
Volume13
Issue number6
Online published14 Jan 2022
Publication statusPublished - 14 Feb 2022

Link(s)

Abstract

Mussel-inspired chemistry has become an ideal platform to engineer a myriad of functional materials, but fully understanding the underlying adhesion mechanism is still missing. Particularly, one of the most pivotal questions is whether catechol still plays a dominant role in molecular-scale adhesion like that in mussel adhesive proteins. Herein, for the first time, we reveal an unexplored adhesion mechanism of mussel-inspired chemistry that is strongly dictated by 5,6-dihydroxyindole (DHI) moieties, amending the conventional viewpoint of catechol-dominated adhesion. We demonstrate that polydopamine (PDA) delivers an unprecedented adhesion of 71.62 mN m-1, which surpasses that of many mussel-inspired derivatives and is even 121-fold higher than that of polycatechol. Such a robust adhesion mainly stems from a high yield of DHI moieties through a delicate synergy of leading oxidation and subsidiary cyclization within self-polymerization, allowing for governing mussel-inspired adhesion by the substituent chemistry and self-polymerization manner. The adhesion mechanisms revealed in this work offer a useful paradigm for the exploitation of functional mussel-inspired materials.

Research Area(s)

  • DOPAMINE POLYMERIZATION, UNDERWATER ADHESION, SURFACE-CHEMISTRY, HIGH UNIFORMITY, WET ADHESION, POLYDOPAMINE, EUMELANIN, DEPOSITION, COATINGS, HYDROGELS

Citation Format(s)

Revisiting the adhesion mechanism of mussel-inspired chemistry. / Zhang, Chao; Xiang, Li; Zhang, Jiawen et al.
In: Chemical Science, Vol. 13, No. 6, 14.02.2022, p. 1698-1705.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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