Nonpolar Organic Dispersion of 2D Ti3C2Tx MXene Flakes via Simultaneous Interfacial Chemical Grafting and Phase Transfer Method

Daesin Kim, Tae Yun Ko, Hyerim Kim, Gun Hee Lee, Sangho Cho, Chong Min Koo

Research output: Contribution to journalArticlepeer-review

140 Citations (Scopus)

Abstract

Herein, we demonstrate a simple and versatile way for preparing stable Ti3C2Tx MXene dispersions in nonpolar organic solvents through a simultaneous interfacial chemical grafting reaction and phase transfer method. Alkylphosphonic acid ligands were chemically grafted on the hydroxyl terminal groups of Ti3C2Tx flakes at the liquid-liquid interface between water and water-immiscible organic medium to form a covalent Ti-O-P bond via interfacial nucleophilic addition and sequential condensation reaction at room temperature; the surface-functionalized Ti3C2Tx flakes concurrently migrated from the aqueous phase to the organic phase. Unlike conventional surface chemical modification methods that require many complex and tedious steps, this is a simple and easy process for fabricating a Ti3C2Tx organic dispersion in various organic solvents, from highly polar to nonpolar. The nonpolar Ti3C2Tx dispersion in chloroform also exhibits strong oxidation resistance and stable long-term storage. This approach provides an opportunity for preparing MXene nanocomposites with nonpolar polymeric matrices that are soluble in organic media for future applications such as stretchable electrode.

Original languageEnglish
Pages (from-to)13818-13828
Number of pages11
JournalACS nano
Volume13
Issue number12
DOIs
Publication statusPublished - 2019 Dec 24

Bibliographical note

Funding Information:
This work was financially supported by the KIST-KAIST Joint research lab (2 V05750), KU-KIST Research, Young Fellow, and KIST Internal Research programs, funded by the Korea Institute of Science and Technology (KIST). This work was also supported by a grant from the Basic Science Research Program (2017R1A2B3006469 and 2019M3D1A2014004) through the National Research Foundation of Korea, funded by the Ministry of Science, ICT and Future Planning; the Fundamental R&D Program (10077545) for Core Technology of Materials; the Industrial Strategic Technology Development Program, funded by the Ministry of Knowledge Economy; and the Construction Technology Research Project (19SCIP-B146646-02), funded by the Ministry of Land, Infrastructure, and Transport, Republic of Korea.

Publisher Copyright:
© 2019 American Chemical Society.

Keywords

  • MXene
  • interfacial condensation reaction
  • nonpolar organic dispersion
  • phase transfer
  • two-dimensional nanomaterials

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy

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