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Engineering Graphene Wrinkles for Large Enhancement of Interlaminar Friction Enabled Damping Capability

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)30278-30289
Number of pages12
JournalACS Applied Materials and Interfaces
Volume11
Issue number33
Early online date26 Jul 2019
DOIs
DateAccepted/In press - 26 Jul 2019
DateE-pub ahead of print - 26 Jul 2019
DatePublished (current) - 21 Aug 2019

Abstract

Graphene nanoplates are hoped-for solid lubricants to reduce friction and energy dissipation in micro- and nano-scale devices benefiting from their interface slips to reach an expected superlubricity. On the contrary, we propose here by introducing engineered wrinkles of graphene nanoplates to exploit and optimize the interfacial energy dissipation mechanisms between the nanoplates in graphene-based composites for enhanced vibration damping performance.
Polyurethane (PU) beams with designed sandwich structures have been successfully fabricated to activate the interlaminar slips of wrinkled graphene-graphene, which significantly contribute to the dissipation of vibration energy. These engineered composite materials with extremely low graphene
content (~0.08wt%) yield a significant increase of quasi-static and dynamic damping compared to the baseline PU beams (by 71% and 94%, respectively). Friction force images of wrinkled graphene 2 / 33 oxide (GO) nanoplates detected via Atomic Force Microscope (AFM) indicate that wrinkles with
large coefficients of friction (COFs) indeed play a dominant role in delaying slip occurrences. Reduction of GO further enhances the COFs of the interacting wrinkles by 7.8% owing to the increased effective contact area and adhesive force. This work provides a new insight on how to design graphene-based composites with optimized damping properties from the microstructure
perspective.

    Structured keywords

  • Bristol Composites Institute ACCIS

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  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the accepted author manuscript (AAM). The final published version (version of record) is available online via ACS at https://doi.org/10.1021/acsami.9b09393 . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 6 MB, PDF document

    Embargo ends: 26/07/20

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