Ice‐Bridging Frustration by Self‐Ejection of Single Droplets Results in Superior Anti‐Frosting Surfaces
Abstract Surfaces capable of delaying the frosting passively and facilitating its removal are highly desirable in fields where ice introduces inefficiencies and risks. Coalescence‐induced condensation droplets jumping (CICDJ), enabled on highly hydrophobic surfaces, is already exploited to slow down...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2024-04-01
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| Series: | Advanced Materials Interfaces |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/admi.202300759 |
| _version_ | 1797220619379539968 |
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| author | Nicolò G. Di Novo Alvise Bagolini Nicola M. Pugno |
| author_facet | Nicolò G. Di Novo Alvise Bagolini Nicola M. Pugno |
| author_sort | Nicolò G. Di Novo |
| collection | DOAJ |
| description | Abstract Surfaces capable of delaying the frosting passively and facilitating its removal are highly desirable in fields where ice introduces inefficiencies and risks. Coalescence‐induced condensation droplets jumping (CICDJ), enabled on highly hydrophobic surfaces, is already exploited to slow down the frosting but it is insufficient to completely eliminate the propagation by ice‐bridging. The study shows here how the self‐ejection of single condensation droplets can fully frustrate all the ice bridges, resulting in a frost velocity lower than 0.5 µm s−1 and thus falling below the current limits of passive surfaces. Arrays of truncated microcones, covered by uniformly hydrophobic nanostructures, enable individual condensation droplets to grow and self‐propel toward the top of the microstructures and then to self‐eject once a precise volume is reached. The independency of self‐ejection on the neighbor droplets allows a fine control of the droplets size and distance distributions and thus the ice‐bridging frustration. The truncated microcones with the smallest heads area fraction maximize the percentage of self‐ejecting droplets and minimize the frost velocity. The ice bridges frustration also implies a small frost area coverage, highly desirable in aeronautics and thermal machines. |
| first_indexed | 2024-04-24T12:52:25Z |
| format | Article |
| id | doaj.art-a71b010681d445a2954a993944c9607b |
| institution | Directory Open Access Journal |
| issn | 2196-7350 |
| language | English |
| last_indexed | 2024-04-24T12:52:25Z |
| publishDate | 2024-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj.art-a71b010681d445a2954a993944c9607b2024-04-06T04:18:59ZengWiley-VCHAdvanced Materials Interfaces2196-73502024-04-011110n/an/a10.1002/admi.202300759Ice‐Bridging Frustration by Self‐Ejection of Single Droplets Results in Superior Anti‐Frosting SurfacesNicolò G. Di Novo0Alvise Bagolini1Nicola M. Pugno2Laboratory of Bioinspired Bionic Nano Meta Materials & Mechanics Department of Civil Environmental and Mechanical Engineering University of Trento Via Mesiano, 77 Trento 38123 ItalySensors and Devices Center Bruno Kessler Fundation Via Sommarive 18 Trento 38123 ItalyLaboratory of Bioinspired Bionic Nano Meta Materials & Mechanics Department of Civil Environmental and Mechanical Engineering University of Trento Via Mesiano, 77 Trento 38123 ItalyAbstract Surfaces capable of delaying the frosting passively and facilitating its removal are highly desirable in fields where ice introduces inefficiencies and risks. Coalescence‐induced condensation droplets jumping (CICDJ), enabled on highly hydrophobic surfaces, is already exploited to slow down the frosting but it is insufficient to completely eliminate the propagation by ice‐bridging. The study shows here how the self‐ejection of single condensation droplets can fully frustrate all the ice bridges, resulting in a frost velocity lower than 0.5 µm s−1 and thus falling below the current limits of passive surfaces. Arrays of truncated microcones, covered by uniformly hydrophobic nanostructures, enable individual condensation droplets to grow and self‐propel toward the top of the microstructures and then to self‐eject once a precise volume is reached. The independency of self‐ejection on the neighbor droplets allows a fine control of the droplets size and distance distributions and thus the ice‐bridging frustration. The truncated microcones with the smallest heads area fraction maximize the percentage of self‐ejecting droplets and minimize the frost velocity. The ice bridges frustration also implies a small frost area coverage, highly desirable in aeronautics and thermal machines.https://doi.org/10.1002/admi.202300759anti‐frostingcondensation frostingdroplet jumpingmicro and nano fabricationself‐ejection |
| spellingShingle | Nicolò G. Di Novo Alvise Bagolini Nicola M. Pugno Ice‐Bridging Frustration by Self‐Ejection of Single Droplets Results in Superior Anti‐Frosting Surfaces Advanced Materials Interfaces anti‐frosting condensation frosting droplet jumping micro and nano fabrication self‐ejection |
| title | Ice‐Bridging Frustration by Self‐Ejection of Single Droplets Results in Superior Anti‐Frosting Surfaces |
| title_full | Ice‐Bridging Frustration by Self‐Ejection of Single Droplets Results in Superior Anti‐Frosting Surfaces |
| title_fullStr | Ice‐Bridging Frustration by Self‐Ejection of Single Droplets Results in Superior Anti‐Frosting Surfaces |
| title_full_unstemmed | Ice‐Bridging Frustration by Self‐Ejection of Single Droplets Results in Superior Anti‐Frosting Surfaces |
| title_short | Ice‐Bridging Frustration by Self‐Ejection of Single Droplets Results in Superior Anti‐Frosting Surfaces |
| title_sort | ice bridging frustration by self ejection of single droplets results in superior anti frosting surfaces |
| topic | anti‐frosting condensation frosting droplet jumping micro and nano fabrication self‐ejection |
| url | https://doi.org/10.1002/admi.202300759 |
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