BUBBLE MOTION ANOMALIES IN AQUEOUS SOLUTIONS OF SIMPLE ALCOHOLS AND FLUROSURFACTANTS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F25%3A00642687" target="_blank" >RIV/67985858:_____/25:00642687 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.conftool.net/icmf2025/sessions.php" target="_blank" >https://www.conftool.net/icmf2025/sessions.php</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

BUBBLE MOTION ANOMALIES IN AQUEOUS SOLUTIONS OF SIMPLE ALCOHOLS AND FLUROSURFACTANTS

Popis výsledku v původním jazyce

Various anomalies are typical for aqueous solutions of simple alcohols, with viscosity maxima and altering of the bubble surface mobility being significant for multiphase systems. Two properties appear to be key in multiphase applications: i) the amphiphilic nature of the molecule, causing the preferential adsorption of molecules at the liquid–gas phase interface, thus affecting the properties of the interface, and (ii) the existence of strong hydrogen bonds, promoting the formation of structures at the molecular level. If the alcohol concentration increases above a certain limit (critical aggregation concentration (CAC), microstructures on molecular level occur. The presence of microstructures significantly affects the bubble surface mobility, because the adsorption and desorption of alcohol is very fast and no Marangoni flows are formed. This study focuses on solutions of 1-propanol (𝑥𝐶𝐴𝐶=0.07) and perfluorooctanoic acid PFOA (CMC = 9 mmol/l). The aim of this work is to investigate how the presence of a strong surfactant affects the surface properties and mobility of a rising bubble. The method of a single rising bubble in a stagnant liquid and the measurement of dynamic surface tension were chosen to characterize the bubble surface.

Název v anglickém jazyce

BUBBLE MOTION ANOMALIES IN AQUEOUS SOLUTIONS OF SIMPLE ALCOHOLS AND FLUROSURFACTANTS

Popis výsledku anglicky

Various anomalies are typical for aqueous solutions of simple alcohols, with viscosity maxima and altering of the bubble surface mobility being significant for multiphase systems. Two properties appear to be key in multiphase applications: i) the amphiphilic nature of the molecule, causing the preferential adsorption of molecules at the liquid–gas phase interface, thus affecting the properties of the interface, and (ii) the existence of strong hydrogen bonds, promoting the formation of structures at the molecular level. If the alcohol concentration increases above a certain limit (critical aggregation concentration (CAC), microstructures on molecular level occur. The presence of microstructures significantly affects the bubble surface mobility, because the adsorption and desorption of alcohol is very fast and no Marangoni flows are formed. This study focuses on solutions of 1-propanol (𝑥𝐶𝐴𝐶=0.07) and perfluorooctanoic acid PFOA (CMC = 9 mmol/l). The aim of this work is to investigate how the presence of a strong surfactant affects the surface properties and mobility of a rising bubble. The method of a single rising bubble in a stagnant liquid and the measurement of dynamic surface tension were chosen to characterize the bubble surface.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/8J24FR012" target="_blank" >8J24FR012: ALCHYMIST: Udržitelné chemické inženýrství: snížení spotřeby energie u kontaktorů typu kapalina-plyn odhalením vlivu jednoduchých ALkoholů s krátkým řetězCem na HYdrodynaMIku bublin a tranSporT kyslíku</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů