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  • Pool-boiling performance on thin metal foils with graphene-oxide-nanoflake deposit [Elektronski vir]
    Bregar, Tadej, strojnik ...
    The pool-boiling performance of water on thin metal foils with graphene-oxide deposition was studied. The boiling performance was evaluated both on fully coated surfaces, achieved by spin-coating, ... and surfaces with a laser-textured nucleation site, into which graphene oxide was added via drop-casting. During the experiments, a high-speed IR camera was used to obtain the transient temperature and heat-flux distribution. At the same time, a high-speed video camera was used to acquire synchronized bubble-growth recordings. In addition, a surface-wettability analysis was conducted for all the samples. In the case of fully coated samples, graphene-oxide deposition resulted in an increased number of active nucleation sites and an increase in the nucleation temperature, leading to a lowered nucleation frequency. Meanwhile, samples with a single laser-textured nucleation site enabled the analysis of isolated vapor bubbles, confirming that graphene-oxide deposition leads to a higher nucleation temperature, consequently resulting in a larger bubble-departure diameter and longer growth time. Two explanations for the results are proposed: the wettability of graphene-oxide deposition and the filling of surface microcavities with graphene-oxide nanoflakes.
    Source: Nanomaterials [Elektronski vir]. - ISSN 2079-4991 (Vol. 12, iss. 16, Aug. 2022, str. 1-17)
    Type of material - e-article
    Publish date - 2022
    Language - english
    COBISS.SI-ID - 118246915

    Link(s):

    https://www.mdpi.com/2079-4991/12/16/2772
    Repository of the University of Ljubljana – RUL
    DOI

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