Krstonosic, Veljko;
Dokic, Ljubica;
Nikolic, Ivana;
Dapcevic, Tamara;
Hadnadjev, Miroslav
Influence of sodium dodecyl sulphate concentration on disperse and rheological characteristics of oil-in-water emulsions stabilized by OSA starch-SDS mixtures
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Medientyp:
E-Artikel
Titel:
Influence of sodium dodecyl sulphate concentration on disperse and rheological characteristics of oil-in-water emulsions stabilized by OSA starch-SDS mixtures
Erschienen in:Journal of the Serbian Chemical Society
Sprache:
Englisch
DOI:
10.2298/jsc100630150k
ISSN:
0352-5139;
1820-7421
Entstehung:
Anmerkungen:
Beschreibung:
<jats:p>Stability of oil-in-water emulsions can be achieved by chemical modified
starch, such as octenyl succinic anhydride (OSA) starch, as emulsifier. In
order to analyse disperse and rheological characteristics of emulsions
containing two kind of emulsifiers, part of the OSA starch can be substituted
with adequate concentration of sodium dodecyl sulphate (SDS), which is small
surfactant with same charge as OSA starch. Oil contents of examined emulsions
were 5, 20 and 50%. Selected OSA starch concentration was 10% and
replacements of the part of OSA starch were realized with SDS concentrations
of 1, 3 and 5%. Dispersed droplets of emulsions were defined by determination
of Sauter mean diameter d32 and particle size distribution. Flow curves were
used to describe rheological properties of the emulsions. Also, stability of
emulsion samples was observed and expressed by the creaming index. Obtained
results indicated decrease in Sauter mean diameter of droplets, standard
deviation and apparent viscosity of emulsions while amounts of SDS increase
within emulsifiers mixture OSA starch-SDS. The emulsions with OSA starch
according to creaming rate were more stable than emulsions stabilized by OSA
starch and SDS combination.</jats:p>