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Rheological studies of concentrated guar gumOblonšek, Marija ; Šostar-Turk, Sonja ; Lapasin, RomanoPolymers and surfactants are essential ingredients of the printing paste. Polysaccharides are used commercially to thicken, suspend or stabilise aqueoussystems. Also they are used to produce gels and ... to act as flocculates, binders, lubricants, to serve as modifiers of film properties, and have a function as adjusters of rheological parameters. Surfactants, on the other hand, perform numerous functions acting as dispersants, wetting agents, emulsifiers and antifoaming agents. The rheological properties of polysaccharide thickeners (guar gums with different substitution levels and different producers) at different concentrations and temperatures and, second,the effects produced by the addition of nonionic surfactants (polyoxyethylene stearyl alcohols with different numbers of EO groups) have been studied under linear and nonlinear shear conditions. Experimental data have been correlated with the different modelsČ flow curves with the Cross, Carreau and Meter-Bird model, and mechanical spectra with the generalized Maxwell model and Friedrich-Braun model. The surface tensions of aqueous systems containing polysaccharide andžor surfactants have been determined overextended concentration ranges in order to detect the CMC conditions and toprovide a better understanding about the polysaccharide-surfactant interactions.Source: Rheologica acta : an international journal of rheology. - ISSN 0035-4511 (Vol. 42, no. 6, 2003, str. 491-499)Type of material - article, component partPublish date - 2003Language - englishCOBISS.SI-ID - 8424214
Author
Oblonšek, Marija |
Šostar-Turk, Sonja |
Lapasin, Romano
Topics
tiskanje tekstilij |
tiskarska gošča |
polisaharidi |
gostila |
reologija |
viskoelastičnost |
površinsko aktivne snovi |
guara |
textile printing |
printing pastes |
polysaccharides |
thickeners |
rheology |
viscoelasticity |
surfactants |
guar gum
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Database name | Field | Year |
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Oblonšek, Marija | 19269 |
Šostar-Turk, Sonja | 06095 |
Lapasin, Romano |
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