Rheological studies of concentrated guar gum

Marija Oblonšek (Author), Sonja Šostar-Turk (Author), Romano Lapasin (Author)

Abstract

Polymers 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.

Keywords

tiskanje tekstilij;tiskarska gošča;polisaharidi;gostila;reologija;viskoelastičnost;površinsko aktivne snovi;guara;textile printing;printing pastes;polysaccharides;thickeners;rheology;viscoelasticity;surfactants;guar gum;

Data

Language:	English
Year of publishing:	2003
Typology:	1.01 - Original Scientific Article
Organization:	UM FS - Faculty of Mechanical Engineering
UDC:	677.027.513:677.042.2
COBISS:	8424214
ISSN:	0035-4511
Views:	1817
Downloads:	72
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary keywords:	tiskanje tekstilij;tiskarska gošča;polisaharidi;gostila;reologija;viskoelastičnost;površinsko aktivne snovi;guara;
URN:	URN:SI:UM:
Pages:	str. 491-499
Volume:	ǂVol. ǂ42
Issue:	ǂno. ǂ6
Chronology:	2003
ID:	8718878