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Liquid metal and Mxene enable self-healing soft electronics based on double networks of bacterial cellulose hydrogels

  • Ming Wang
  • , Orlando J. Rojas*
  • , Like Ning
  • , Yuehu Li
  • , Xun Niu
  • , Xuetong Shi
  • , Haisong Qi*
  • *Corresponding author for this work
  • South China University of Technology
  • University of British Columbia
  • Nanjing Forestry University

Research output: Contribution to journalArticleScientificpeer-review

96 Citations (Scopus)
150 Downloads (Pure)

Abstract

Liquid metal (LM) nanodroplets and MXene nanosheets are integrated with sulfonated bacterial nanocellulose (BNC) and acrylic acid (AA). Upon fast sonication, AA polymerization leads to a crosslinked composite hydrogel in which BNC exfoliates Mxene, forming organized conductive pathways. Soft conducting properties are achieved in the presence of colloidally stable core-shell LM nanodroplets. Due to the unique gelation mechanism and the effect of Mxene, the hydrogels spontaneously undergo surface wrinkling, which improves their electrical sensitivity (GF = 8.09). The hydrogels are further shown to display interfacial adhesion to a variety of surfaces, ultra-elasticity (tailorable elongation, from 1000 % to 3200 %), indentation resistance and self-healing capabilities. Such properties are demonstrated in wearable, force mapping, multi-sensing and patternable electroluminescence devices.

Original languageEnglish
Article number120330
JournalCarbohydrate Polymers
Volume301
Early online date15 Nov 2022
DOIs
Publication statusPublished - 1 Feb 2023
MoE publication typeA1 Journal article-refereed

Funding

The authors are grateful for the financial support for this work by Guangdong Province Science Foundation ( 2017GC010429 ) and Science and Technology Program of Guangzhou ( 202002030329 ). M.W., O.J.R, L.N., X.N. and X.S. gratefully acknowledge the Canada Excellence Research Chair Program ( CERC-2018-00006 ), Canada Foundation for Innovation (Project number 38623 ) and ">H2020-ERC-2017-Advanced Grant ‘BioELCell’ ( 788489 ).

Keywords

  • Bacterial nanocellulose
  • Electroactive hydrogels
  • Force mapping
  • Liquid metals
  • Self-healing
  • TiCT MXene

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