Determining surfactant CMC in electrolyte solutions by ultrasound velocimetry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F10%3APU94241" target="_blank" >RIV/00216305:26310/10:PU94241 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Determining surfactant CMC in electrolyte solutions by ultrasound velocimetry

Popis výsledku v původním jazyce

High resolution ultrasound spectroscopy is a versatile tool in colloid chemistry that has started to be available also commercially several years ago. Among other, it can be used to determine the critical micellar concentration and compressibility of surfactant molecules or micelles which in turn can be used to elucidate their hydration, structure and intermolecular interactions. Concentration increment of ultrasound velocity, i.e. the change of ultrasound velocity in the solution relatively to the puresolvent per unit solute concentration, plays an important role in evaluation of ultrasonic data from such studies. We have found, however, that its use in surfactant solutions containing electrolytes can be problematic and can even lead to overlooking the point of micellization. This is due to much lower critical micellar concentration in the presence of electrolytes and, consequently, smaller changes in ultrasound velocity. Because the increment includes the reciprocal surfactant conce

Název v anglickém jazyce

Determining surfactant CMC in electrolyte solutions by ultrasound velocimetry

Popis výsledku anglicky

High resolution ultrasound spectroscopy is a versatile tool in colloid chemistry that has started to be available also commercially several years ago. Among other, it can be used to determine the critical micellar concentration and compressibility of surfactant molecules or micelles which in turn can be used to elucidate their hydration, structure and intermolecular interactions. Concentration increment of ultrasound velocity, i.e. the change of ultrasound velocity in the solution relatively to the puresolvent per unit solute concentration, plays an important role in evaluation of ultrasonic data from such studies. We have found, however, that its use in surfactant solutions containing electrolytes can be problematic and can even lead to overlooking the point of micellization. This is due to much lower critical micellar concentration in the presence of electrolytes and, consequently, smaller changes in ultrasound velocity. Because the increment includes the reciprocal surfactant conce

Druh

O - Ostatní výsledky

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/OC08004" target="_blank" >OC08004: Asociativní koloidy hyaluronan-tenzid, hyaluronan-aminokyselina pro nanomedicínské aplikace.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2010

Kód důvěrnosti údajů

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