Near-infrared light-responsive hydrogels: Via peroxide-decorated MXene-initiated polymerization

  • Na Tao
  • , Depan Zhang
  • , Xilong Li
  • , Dongyang Lou
  • , Xiaoyi Sun
  • , Chuanwan Wei
  • , Juan Li*
  • , Junliang Yang
  • , You Nian Liu
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)10765-10771
Number of pages7
JournalChemical Science
Volume10
Issue number46
DOIs
Publication statusPublished - 2019
Externally publishedYes

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