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Research Article

Strong and stiff Ag nanowire-chitosan composite films reinforced by Ag-S covalent bonds

Xiao-Feng Pan1, Huai-Ling Gao2, Yang Su1, Ya-Dong Wu1, Xiang-Ying Wang1, Jing-Zhe Xue2, Tao He1, Yang Lu1( ), Jian-Wei Liu2, Shu-Hong Yu2 ( )
School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei230009China
Division of Nanomaterials and ChemistryHefei National Laboratory for Physical Sciences at MicroscaleCollaborative Innovation Center of Suzhou Nano Science and TechnologyCAS Center for Excellence in NanoscienceDepartment of ChemistryUniversity of Science and Technology of ChinaHefei230026China
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Abstract

High-performance composites containing various kinds of nanofibers as reinforcing building blocks have recently received considerable attention, owing to their superior mechanical properties. One of the effective strategies to reinforce these composites involves strengthening interfacial interactions via covalent bonds. However, in contrast to nanosheets, covalent bonds have been rarely used in nanofiber-reinforced composites. Herein, we report the macroscale fabrication of a series of Ag nanowire (NW)-thiolated chitosan (TCS) composite films via spray induced self-assembly. The obtained films were significantly strengthened by Ag-S covalent bonds formed between the Ag NWs and the thiol groups of TCS. The tensile strength of the optimized Ag NW-TCS film was up to 3.9 and 1.5 times higher compared with that of pure TCS and Ag NW-chitosan (CS) films, respectively.

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Keywords

silver nanowirethiolated chitosanAg-S covalent bondsprayingreinforcement

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Nano Research
Volume 11 Issue 1,
January 2018
Pages 410-419
DOI: 10.1007/s12274-017-1644-x

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Cite this article:
Pan X-F, Gao H-L, Su Y, et al. Strong and stiff Ag nanowire-chitosan composite films reinforced by Ag-S covalent bonds. Nano Research, 2018, 11(1): 410-419. https://doi.org/10.1007/s12274-017-1644-x

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Received: 17 March 2017
Revised: 19 April 2017
Accepted: 23 April 2017
Published: 15 August 2017
© Tsinghua University Press and Springer-Verlag GmbH Germany 2017