Enhanced evaporation strength through fast water permeation in graphene-oxide deposition

Tong Wei Ling, Wee Jun Ong, Siang-Piao Chai, Ming Kwang Tan, Yew Mun Hung

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    22 Citations (Scopus)

    Abstract

    The unique characteristic of fast water permeation in laminated graphene oxide (GO) sheets has facilitated the development of ultrathin and ultrafast nanofiltration membranes. Here we report the application of fast water permeation property of immersed GO deposition for enhancing the performance of a GO/water nanofluid charged two-phase closed thermosyphon (TPCT). By benchmarking its performance against a silver oxide/water nanofluid charged TPCT, the enhancement of evaporation strength is found to be essentially attributed to the fast water permeation property of GO deposition instead of the enhanced surface wettability of the deposited layer. The expansion of interlayer distance between the graphitic planes of GO deposited layer enables intercalation of bilayer water for fast water permeation. The capillary force attributed to the frictionless interaction between the atomically smooth, hydrophobic carbon structures and the well-ordered hydrogen bonds of water molecules is sufficiently strong to overcome the gravitational force. As a result, a thin water film is formed on the GO deposited layers, inducing filmwise evaporation which is more effective than its interfacial counterpart, appreciably enhanced the overall performance of TPCT. This study paves the way for a promising start of employing the fast water permeation property of GO in thermal applications.
    Original languageEnglish
    Pages (from-to)1 - 13
    Number of pages13
    JournalScientific Reports
    Volume5
    Issue numberJune 2015
    DOIs
    Publication statusPublished - 2015

    Cite this

    Ling, T. W., Ong, W. J., Chai, S-P., Tan, M. K., & Hung, Y. M. (2015). Enhanced evaporation strength through fast water permeation in graphene-oxide deposition. Scientific Reports, 5(June 2015), 1 - 13. https://doi.org/10.1038/srep11896