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Disturbing stability of interface by adopting phase-change temperature gradient to reduce ice adhesion strength

Chen, T; Jin, J; Qi, Y; Tian, W; Cong, Q; Choy, KL; (2019) Disturbing stability of interface by adopting phase-change temperature gradient to reduce ice adhesion strength. Cold Regions Science and Technology , 158 pp. 69-75. 10.1016/j.coldregions.2018.11.010. Green open access

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Abstract

The study proposes a novel de-icing model that established a phase-change temperature gradient on an interface to alter the contact stability between the substrate surface and the ice cover. During the experiment, pits of the same size were machined on the surface of aluminum alloy and polymethyl methacrylate, which are both regarded as the experimental materials, and ethanol solutions with different freezing points were filled in the pits. The ice adhesion strength on each substrate was repeatedly measured under different conditions. The results show that the ice adhesion strength on a sample with a phase-change temperature gradient was significantly reduced when compared to the ice adhesion strength on a smooth sample. That meant that the proposed de-icing model had the excellent de-icing capability. Owing to the rigid constraints of the pit boundaries and different mass concentrations of the ethanol solutions, an ethanol solution filling in the pits at different positions had an intermittent impact on the elastic interface between the ice and substrate. This deformed the interface, and the accumulated ice was always subjected to an upward impingement load, which affected the contact stability of the interface and causing the accumulated ice to separate from the sample surface. The energy released from the solution at low temperature could be used to enhance the active de-icing of various components, and to advance the development of new de-icing methods and materials.

Type: Article
Title: Disturbing stability of interface by adopting phase-change temperature gradient to reduce ice adhesion strength
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.coldregions.2018.11.010
Publisher version: https://doi.org/10.1016/j.coldregions.2018.11.010
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Aqueous solution, Phase-change temperature gradient, Phase change energy, Deformed interface, Ice adhesion strength
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery
URI: https://discovery.ucl.ac.uk/id/eprint/10066730
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