Mixtures of Cationic Copolymers and Oppositely Charged Surfactants: Effect of Polymer Charge Density and Ionic Strength on the Adsorption Behavior at the Silica–Aqueous Interface

2012 ◽  
Vol 4 (3) ◽  
pp. 1500-1511 ◽  
Author(s):  
Andreas Mohr ◽  
Tommy Nylander ◽  
Lennart Piculell ◽  
Björn Lindman ◽  
Volodymyr Boyko ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Charge Density ◽  
Adsorption Behavior ◽  
Cationic Copolymers ◽  
Oppositely Charged

Interactions between Oppositely Charged Polyelectrolytes by Isothermal Titration Calorimetry: Effect of Ionic Strength and Charge Density

2017 ◽  
Vol 121 (12) ◽  
pp. 2684-2694 ◽  
Author(s):  
Feriel Meriem Lounis ◽  
Joseph Chamieh ◽  
Laurent Leclercq ◽  
Philippe Gonzalez ◽  
Amine Geneste ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Charge Density ◽  
Isothermal Titration Calorimetry ◽  
Titration Calorimetry ◽  
Oppositely Charged

scholarly journals Compositional and Temperature Effects on the Rheological Properties of Polyelectrolyte–Surfactant Hydrogels

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 927 ◽  
Author(s):  
Jiří Smilek ◽  
Sabína Jarábková ◽  
Tomáš Velcer ◽  
Miloslav Pekař
Keyword(s):  
Ionic Strength ◽  
Rheological Properties ◽  
Surfactant Concentration ◽  
Background Electrolyte ◽  
Effect Of Temperature ◽  
Physical Interactions ◽  
Chain Conformations ◽  
Oppositely Charged ◽  
Electrolyte Ph ◽  
Positively Charged

The rheological properties of hydrogels prepared by physical interactions between oppositely charged polyelectrolyte and surfactant in micellar form were studied. Specifically, hyaluronan was employed as a negatively charged polyelectrolyte and Septonex (carbethopendecinium bromide) as a cationic surfactant. Amino-modified dextran was used as a positively charged polyelectrolyte interacting with sodium dodecylsulphate as an anionic surfactant. The effects of the preparation method, surfactant concentration, ionic strength (the concentration of NaCl background electrolyte), pH (buffers), multivalent cations, and elevated temperature on the properties were investigated. The formation of gels required an optimum ionic strength (set by the NaCl solution), ranging from 0.15–0.3 M regardless of the type of hydrogel system and surfactant concentration. The other compositional effects and the effect of temperature were dependent on the polyelectrolyte type or its molecular weight. General differences between the behaviour of hyaluronan-based and cationized dextran-based materials were attributed to differences in the chain conformations of the two biopolymers and in the accessibility of their charged groups.

TEMPO-Mediated Oxidation of Pullulan and Influence of Ionic Strength and Linear Charge Density on the Dimensions of the Obtained Polyelectrolyte Chains

1996 ◽  
Vol 29 (20) ◽  
pp. 6541-6547 ◽  
Author(s):  
A. E. J. de Nooy ◽  
A. C. Besemer ◽  
H. van Bekkum ◽  
J. A. P. P. van Dijk ◽  
J. A. M. Smit
Keyword(s):  
Ionic Strength ◽  
Charge Density ◽  
Linear Charge ◽  
Linear Charge Density ◽  
Mediated Oxidation

Effects of Ionic Strength and Charge Density on the Stability of Chloride Complexes of Trivalent Lanthanides

2008 ◽  
Vol 53 (8) ◽  
pp. 1756-1761 ◽  
Author(s):  
Edelmira Fernández-Ramírez ◽  
Melania Jiménez-Reyes ◽  
Marcos J. Solache-Ríos
Keyword(s):  
Ionic Strength ◽  
Charge Density ◽  
Chloride Complexes ◽  
Trivalent Lanthanides ◽  
The Stability
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