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Processable and Robust MoS 2 Paper Chemically Cross‐Linked with Polymeric Ligands by the Coordination of Divalent Metal Ions
Author(s) -
Liu YiTao,
Tan Zhen,
Xie XuMing,
Wang ZhiFeng,
Ye XiongYing
Publication year - 2013
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201201177
Subject(s) - materials science , nanocomposite , copper , carboxylate , x ray photoelectron spectroscopy , methacrylate , polymer , ligand (biochemistry) , fourier transform infrared spectroscopy , chemical engineering , raman spectroscopy , coordination complex , metal , nanotechnology , composite material , copolymer , organic chemistry , chemistry , metallurgy , physics , optics , engineering , biochemistry , receptor
Inorganic graphene analogues (IGAs) are a huge and fascinating family of compounds that have extraordinary electronic, mechanical, and thermal properties. However, one of the largest problems that face the industrial application of IGAs is their poor processability, which has led to a “bottlenecking” in the development of freestanding, large‐area, IGA‐based thin‐film devices. Herein, we report a facile and cost‐efficient method to chemically modify IGAs by using their abundant coordination atoms (S, O, and N). Taking MoS 2 as an example, we have prepared homogeneous “solution” systems, in which MoS 2 nanosheets are chemically cross‐linked through a carboxylate‐containing polymeric ligand, poly(methyl methacrylate) (PMMA), by copper‐ion coordination. Bonding interactions between CO bonds and sulfur atoms through copper ions were confirmed by various characterization techniques, such as UV/Vis, FTIR, and Raman spectroscopy and XPS. By using our method, freestanding MoS 2 paper with significantly improved mechanical properties was obtained, thus laying the basis for the mass production of large‐area MoS 2 ‐based thin‐film devices. Furthermore, copper‐ion coordination was also applied to MoS 2 /PMMA nanocomposites. Direct and strong nanofiller/matrix bonding interactions facilitate efficient load transfer and endow the polymeric nanocomposites with an excellent reinforcement effect. This method may pave a new way to high‐strength polymeric nanocomposites with superior frictional properties, flame retardance, and oxidation resistance.