Projekteja vuodessa
Abstrakti
Bubbles and foams are often removed via chemical defoamers and/or mechanical agitation. Designing surfaces that promote chemical-free and energy-passive bubble capture is desirable for numerous industrial processes, including mineral flotation, wastewater treatment, and electrolysis. When immersed, super-liquid-repellent surfaces form plastrons, which are textured solid topographies with interconnected gas domains. Plastrons exhibit the remarkable ability of capturing bubbles through coalescence. However, the two-step mechanics of plastron-induced bubble coalescence, namely, rupture (initiation and location) and subsequent absorption (propagation and drainage) are not well understood. Here, the influence of 1) topographical feature size and 2) gas fraction on bubble capture dynamics is investigated. Smaller feature sizes accelerate rupture while larger gas fractions markedly improve absorption. Rupture is initiated solely on solid domains and is more probable near the edges of solid features. Yet, rupture time becomes longer as solid fraction increases. This counterintuitive behavior represents unexpected complexities. Upon rupture, the bubble's moving liquid-solid contact line influences its absorption rate and equilibrium state. These findings show the importance of rationally minimizing surface feature sizes and contact line interactions for rapid bubble rupture and absorption. This work provides key design principles for plastron-induced bubble coalescence, inspiring future development of industrially-relevant surfaces for underwater bubble capture.
Alkuperäiskieli | Englanti |
---|---|
Artikkeli | 2403366 |
Julkaisu | Advanced Science |
Vuosikerta | 11 |
Numero | 33 |
Varhainen verkossa julkaisun päivämäärä | 2024 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 4 syysk. 2024 |
OKM-julkaisutyyppi | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä |
Sormenjälki
Sukella tutkimusaiheisiin 'Designing Plastrons for Underwater Bubble Capture : From Model Microstructures to Stochastic Nanostructures'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.Projektit
- 4 Aktiivinen
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Wong William: Enhanced Electrocatalysis via the Plastron Effect
Wong, W. (Vastuullinen tutkija), Koochak, P. (Projektin jäsen) & Alikhanifaradonbeh, R. (Projektin jäsen)
01/09/2022 → 31/08/2025
Projekti: Academy of Finland: Other research funding
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SuperElectro: Super(de)wettability-enhanced Electrocatalysis
Ras, R. (Vastuullinen tutkija) & Wong, W. (Projektin jäsen)
01/05/2022 → 31/10/2025
Projekti: EU: MC
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-: Elävien toimintojen innoittamat hybridimateriaalit
Ras, R. (Vastuullinen tutkija), Al-Terke, H. (Projektin jäsen), Junaid, M. (Projektin jäsen), Nurmi, H. (Projektin jäsen), Liu, K. (Projektin jäsen), Zhou, S. (Projektin jäsen), Mattila, M. (Projektin jäsen), Morais Jaques, Y. (Projektin jäsen), Huhtamäki, T. (Projektin jäsen), Wagener, L. Z. J. S. (Projektin jäsen), Vuckovac, M. (Projektin jäsen) & Lepikko, S. (Projektin jäsen)
01/01/2022 → 31/12/2024
Projekti: Academy of Finland: Other research funding
Laitteet
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OtaNano Nanomikroskopiakeskus
Seitsonen, J. (Manager) & Rissanen, A. (Other)
OtaNanoLaitteistot/tilat: Facility