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KOLENOVÁ, M. KARGEROVÁ, A.
Originální název
The interactions of dextran with surfactant SDS
Typ
abstrakt
Jazyk
angličtina
Originální abstrakt
Dextran is a homopolysaccharide made of many glucose molecules, produced by enzymatic conversion to sucrose as a bacterial product [1]. Because of positive charged dextran hydrochloride (DEAE) and negative charged sodium dodecyl sulphate (SDS), we can measure interactions between them. Added surfactant reacts with hydrophobic groups of the homopolysaccharide which leads to micelles formation. Micelles can be determined using high resolution ultrasonic spectroscopy (HR-US) which employs sound waves during the measurement. Before characterization of interactions between DEAE and surfactant SDS, properties of DEAE solutions of various concentrations in different solvents (water and 0.15 mmol/l NaCl) were investigated. The ultrasonic velocity was measured by HR-US in a kinetic mode at 25 °C. The ultrasonic velocity increases linearly with the increasing concentration of DEAE. Subsequently, interactions of DEAE with SDS were examined to determine the critical aggregation and critical micelle concentration using HR-US in a titration mode at 25 °C. At first, titration was performed with SDS in water and 0.15 mmol/l NaCl. The velocity increases with increasing surfactant concentration and the point of abrupt change of the slope determines CMC. CMC of water was determined as 9.5 mmol/l and CMC of 0.15 mmol/l NaCl as 1.6 mmol/l.
Klíčová slova
Dextran, SDS, high resolution ultrasonic sepctroscopy
Autoři
KOLENOVÁ, M.; KARGEROVÁ, A.
Vydáno
5. 10. 2018
Nakladatel
Brno University of Technology, Faculty of Chemistry
Místo
Brno
Strany od
35
Strany do
36
Strany počet
72
URL
htpps://www.ultrasonic2018.com//
BibTex
@misc{BUT155782, author="Andrea {Hurčíková} and Milada {Marčanová}", title="The interactions of dextran with surfactant SDS", booktitle="Book of abstracts.", year="2018", pages="35--36", publisher="Brno University of Technology, Faculty of Chemistry", address="Brno", url="htpps://www.ultrasonic2018.com//", note="abstract" }