Rheological properties of semidilute and concentrated aqueous solutions of cetyltrimethylammonium bromide in the presence of potassium bromide

Langmuir ◽  
1989 ◽  
Vol 5 (5) ◽  
pp. 1225-1229 ◽  
Author(s):  
S. J. Candau ◽  
E. Hirsch ◽  
R. Zana ◽  
M. Delsanti
Keyword(s):  
Aqueous Solutions ◽  
Rheological Properties ◽  
Cetyltrimethylammonium Bromide ◽  
Potassium Bromide ◽  
Concentrated Aqueous Solutions

Rheological properties of semidilute and concentrated aqueous solutions of cetyltrimethylammonium bromide in the presence of potassium bromide

Langmuir ◽  
1992 ◽  
Vol 8 (2) ◽  
pp. 437-440 ◽  
Author(s):  
F. Kern ◽  
P. Lemarechal ◽  
S. J. Candau ◽  
M. E. Cates
Keyword(s):  
Aqueous Solutions ◽  
Rheological Properties ◽  
Cetyltrimethylammonium Bromide ◽  
Potassium Bromide ◽  
Concentrated Aqueous Solutions

scholarly journals Influence of starch origin on rheological properties of concentrated aqueous solutions

2011 ◽  
Vol 65 (6) ◽  
pp. 645-655
Author(s):  
Zeljko Stojanovic ◽  
Katarina Jeremic ◽  
Slobodan Jovanovic
Keyword(s):  
Aqueous Solutions ◽  
Rheological Properties ◽  
Corn Starch ◽  
Loss Modulus ◽  
Potato Starch ◽  
Fractal Dimensions ◽  
Elastic Behavior ◽  
Starch Solution ◽  
Concentrated Aqueous Solutions ◽  
Slow Aggregation

The rheological properties of corn and potato starch concentrated aqueous solutions were investigated at 25?C. The starches were previously dispersed in water and the solutions were obtained by heating of dispersions at 115-120?C for 20 minutes. The solutions of potato starch were transparent, while the corn starch solutions were opalescent. The results of dynamic mechanical measurements showed that the values of viscosity, h, storage modulus, G?, and loss modulus, G?, of the corn starch solutions increased with the storage time. This phenomenon was not observed for the potato starch solutions. It was assumed that the increase of h, G? and G? is the result of starch solutions retrogradation. The potato starch solutions retrogradation did not occur probably because of the phosphates presence. The viscosity of 2 mass % corn starch solution is less than the viscosity of 2 mass % potato starch solution. By increasing the concentration of corn starch solution the gel with elastic behavior was formed. The corn starch solutions formed gel as early as at 4 mass % concentration, while potato starch solutions achieved the gel state at the concentration of 5 mass %. The value of exponent m (G? and G? ? wm) during the transition of potato starch solutions to gel is 0.414, which gives the fractal dimensions for corn starch of 2.10. The obtained value of fractal dimension corresponds to slow aggregation. The corn starch solutions with the starch concentrations higher than 4 mass % form weak gels. For these solutions the values of modulus in rubber plateau were determined. It was found that the modulus in rubber plateau increased with the concentration by the exponent of 4.36. Such high exponent value was obtained in the case when the tridimensional network is formed, i.e. when supermolecular structures like associates or crystal domains are formed.

Rheological properties of guar and its methyl, hydroxypropyl and hydroxypropyl-methyl derivatives in semidilute and concentrated aqueous solutions

Polymer ◽  
2010 ◽  
Vol 51 (9) ◽  
pp. 1972-1982 ◽  
Author(s):  
Daniela Risica ◽  
Andrea Barbetta ◽  
Luca Vischetti ◽  
Cesare Cametti ◽  
Mariella Dentini
Keyword(s):  
Aqueous Solutions ◽  
Rheological Properties ◽  
Concentrated Aqueous Solutions ◽  
Methyl Derivatives

Rheological properties of concentrated aqueous solutions of anionic and cationic polyelectrolyte mixtures

2008 ◽  
Vol 50 (7) ◽  
pp. 751-756 ◽  
Author(s):  
V. E. Dreval’ ◽  
G. B. Vasil’ev ◽  
E. A. Litmanovich ◽  
V. G. Kulichikhin
Keyword(s):  
Aqueous Solutions ◽  
Rheological Properties ◽  
Cationic Polyelectrolyte ◽  
Concentrated Aqueous Solutions

Optical and Rheological Properties of a Semi-Diluted Equimolar Solution of Cetyltrimethylammonium Bromide and Potassium Bromide

1997 ◽  
Vol 7 (2) ◽  
pp. 257-270 ◽  
Author(s):  
J. P. Decruppe ◽  
E. Cappelaere ◽  
R. Cressely
Keyword(s):  
Rheological Properties ◽  
Cetyltrimethylammonium Bromide ◽  
Potassium Bromide ◽  
Equimolar Solution

Phase Behavior of Concentrated Aqueous Solutions of Cetyltrimethylammonium Bromide (CTAB) and Sodium Hydroxy Naphthoate (SHN)

Langmuir ◽  
2005 ◽  
Vol 21 (23) ◽  
pp. 10439-10443 ◽  
Author(s):  
R. Krishnaswamy ◽  
S. K. Ghosh ◽  
S. Lakshmanan ◽  
V. A. Raghunathan ◽  
A. K. Sood
Keyword(s):  
Aqueous Solutions ◽  
Phase Behavior ◽  
Cetyltrimethylammonium Bromide ◽  
Concentrated Aqueous Solutions

scholarly journals Measurement and correlation of the activity coefficients of H+ and HSO3- in concentrated aqueous solutions of NaCl.

1996 ◽  
Vol 29 (4) ◽  
pp. 588-593
Author(s):  
Seiya Hirohama ◽  
Dai Takeda ◽  
Mamoru Iwasaki ◽  
Kazushige Kawamura
Keyword(s):  
Aqueous Solutions ◽  
Activity Coefficients ◽  
Concentrated Aqueous Solutions

Thermodynamics of Concentrated Aqueous Solutions of Hydrochloric Acid

1937 ◽  
Vol 59 (10) ◽  
pp. 1855-1868 ◽  
Author(s):  
Gösta Åkerlöf ◽  
John W. Teare
Keyword(s):  
Hydrochloric Acid ◽  
Aqueous Solutions ◽  
Concentrated Aqueous Solutions
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