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Boron Nitride Nanosheets Embedded Bio-inspired Wet Adhesives with switchable adhesion and oxidation resistance

Abstract

Smart adhesives that can debond from a surface on-command in response to stimulus are highly desired. However, over-oxidation of mussel-mimetic adhesive greatly reduce free-catechol groups and result an irreversible cross-linked network especially in alkaline environment. Driven by the synergistic effect of reconstructive Schiff bases equilibrium and adjustable dimethylaminoethyl methacrylate (DMAEMA) wettability, an insulated and bactericidal mussel-mimetic nanocomposite adhesive is developed with switchable adhesion and oxidation resistance. Amino-decorated boron nitride nanosheets serve as adhesives building block can interact with aldehyde groups terminated PEG side chains to form pH-responsive Schiff base network in situ and reinforce the cohesion of adhesives. The alkaline-induced hydrophobic DMAEMA displaying oxidation inhibiting effect is subtly incorporated, which can maintain sufficient free-catechol groups to provide desirable adhesion and hinder the irreversible crosslinking of catechols. After acid treatment, the debonding imine linkage together with acid-induced hydrophilic DMAEMA can drastically decrease bonding strength. Besides, the unique electric properties of BNNSs and inherent antibacterial activity of Schiff bases endow the as-prepared adhesive with additional prominent functionalities, such as high breakdown strength, low dielectric constant/loss and superior bactericidal effect against both gram-positive and gram-negative bacterials. This multifunctional adhesive may possess extensive application in biomedical and marine industry.

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Publication details

The article was received on 15 Mar 2019, accepted on 05 Apr 2019 and first published on 15 Apr 2019


Article type: Paper
DOI: 10.1039/C9TA02827G
Citation: J. Mater. Chem. A, 2019, Accepted Manuscript

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    Boron Nitride Nanosheets Embedded Bio-inspired Wet Adhesives with switchable adhesion and oxidation resistance

    B. Jin, G. Zhang, J. Lian, Q. Zhang, X. Zhan and F. Chen, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA02827G

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