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Near-infrared light-responsive hydrogels via peroxide-decorated MXene-initiated polymerization

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Abstract

Two-dimensional MXene Ti3C2Tx nanosheets with peroxide decoration (p-Ti3C2Tx) are synthesized by a sonication-assisted MILD etching method. The obtained MXenes can generate hydroxyl radical species and act as an initiator for free-radical polymerization of a series of acrylic monomers without the use of light illumination or co-initiators. The monomers analyzed include acrylamide, N-isopropylacrylamide (NIPAM), N,N-dimethylacrylamide, methyl methacrylate, and hydroxyethyl methacrylate. By simply mixing N-isopropylacrylamide monomers and p-Ti3C2Tx nanosheets under deoxygenated conditions, PNIPAM-based nanocomposite hydrogels are synthesized using a high concentration of the monomer. The nanocomposite hydrogels have a photothermal conversion efficiency of 34.7% and photothermal stability superior to that of pristine Ti3C2Tx. Taking advantage of the thermal responsive behavior of PNIPAM, the nanocomposite hydrogels are successfully exploited as remotely near-infrared light controlled “smart” windows, fluidic valves and photodetectors.

Graphical abstract: Near-infrared light-responsive hydrogels via peroxide-decorated MXene-initiated polymerization

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Publication details

The article was received on 06 Aug 2019, accepted on 01 Oct 2019 and first published on 02 Oct 2019


Article type: Edge Article
DOI: 10.1039/C9SC03917A
Chem. Sci., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
    All publication charges for this article have been paid for by the Royal Society of Chemistry

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    Near-infrared light-responsive hydrogels via peroxide-decorated MXene-initiated polymerization

    N. Tao, D. Zhang, X. Li, D. Lou, X. Sun, C. Wei, J. Li, J. Yang and Y. Liu, Chem. Sci., 2019, Advance Article , DOI: 10.1039/C9SC03917A

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