Solution-based processing of two-dimensional (2D) nanomaterials is highly desirable, especially for the low-temperature large-area fabrication of flexible multifunctional devices. MXenes, an emerging family of 2D materials composed of transition metal carbides, carbonitrides, or nitrides, provide excellent electrical and electrochemical properties through aqueous processing. Here, we further expand the horizon of MXene processing by introducing a polymeric superdispersant for MXene nanosheets. Segmented anchor-spacer structures of a comb-type polymer, polycarboxylate ether (PCE), provide polymer grafting–like steric spacings over the van der Waals range of MXene surfaces, thereby reducing the colloidal interactions by the order of 103, regardless of solvent. An unprecedented broad dispersibility window for Ti3C2Tx MXene, covering polar, nonpolar, and even ionic solvents, was achieved. Furthermore, close PCE entanglements in MXene@PCE composite films resulted in highly robust properties upon prolonged mechanical and humidity stresses.
|Publication status||Published - 2022 Apr|
Bibliographical noteFunding Information:
We extend a special thanks to Y. Gogotsi in Drexel University for advices on organizing and editing of the manuscript. Funding: This research was supported by the grant from Construction Technology Research Project funded by the Ministry of Land, Infrastructure and Transport of Korea government (21SCIP-B146646-04), Creative Materials Discovery Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT, Korea (NRF-2019M3D1A1078299), and Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT) (Project Number: KMDF202012B02-02). J.H.C. was partially supported by the Yonsei Signature Research Cluster Program of 2021 (2021-22-0004). Author contributions: G.S.P. and B.L. conceived the study. G.S.P. and D.H.H. performed the experiments. D.W.K. validated and advised on the rationale of the idea. S.B.J. and B.L. wrote and revised the manuscript. S.J, D.Y.R, N.L. S.K. and Y.J.S helped to characterize the dispersion characteristics and analyze data. S.B.J. and J.H.C. supervised the entire project. All authors discussed the research progress and contributed to the editing of the manuscript. Competing interests: The authors declare that they have no competing interests. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials.
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