A Surface Tension Study of the Interaction of Dimethyldodecylamine Oxide with Potassium Dodecanesulfonate in Dilute Aqueous Solution

1964 ◽  
Vol 68 (11) ◽  
pp. 3219-3225 ◽  
Author(s):  
Milton J. Rosen ◽  
David Friedman ◽  
Michael Gross
Keyword(s):  
Aqueous Solution ◽  
Surface Tension ◽  
Dilute Aqueous Solution ◽  
Surface Tension Study

Ozonation of pine kraft lignin in alkaline solution. Part 2: Surface active properties of the ozonated kraft lignins

Holzforschung ◽  
2004 ◽  
Vol 58 (6) ◽  
pp. 631-639 ◽  
Author(s):  
Rui Wang ◽  
Chen-Loung Chen ◽  
Josef S. Gratzl
Keyword(s):  
Aqueous Solution ◽  
Surface Tension ◽  
Sodium Chloride ◽  
Synergistic Effect ◽  
Interfacial Tension ◽  
Kraft Lignin ◽  
Average Molecular Mass ◽  
Adsorption Equation ◽  
Gibbs Adsorption Equation ◽  
Dilute Aqueous Solution

Abstract The surface tension and interfacial tension of the F-1000, F-1800, F-5000 and F-15000 fractions obtained by ultrafiltration of the Oz-25-KL, Oz-30-KL and Oz-40-KL preparations (ozonated kraft lignin, KL, preparations with ozone consumption of 25, 30 and 40% per KL) were determined with the concentration range of 1–30 g l-1 at pH of 6, 9 and 11. The surface tension of these ozonated KL preparations decreased with increasing concentration and pH according to the simplified Gibbs adsorption equation for dilute aqueous solution, ∂γ= -RTΓ∂(ln C). The results were discussed in term of functional group contents and weight average molecular mass (Mw) of the ozonated KL preparations. The surface tension of the ozonated KL preparations decreased with increasing carboxylic acid content and, to some extent, phenolic hydroxyl content, but increased with increasing Mw. The synergistic effect of the ozonated KL preparations with a commercial surfactant was then investigated. The oil-water interfacial tension was determined in the ozonated KL preparations in an aqueous solution containing 1.5% Petrostep B-120R and 1.5% sodium chloride with hexane as oil phase by spinning drop technique. The interfacial tension of the system also decreased with increasing the concentration of ozonated KL preparations in the range of 1–16 g l-1 according to the simplified Gibbs adsorption equation. Thus, the addition of a small amount of ozonated KL preparations to the aqueous solution containing 1.5% Petrostep B-120R and 1.5% sodium chloride showed a remarkable synergistic effect on reducing the interfacial tension.

scholarly journals Freeze concentration of dilute aqueous solution

1968 ◽  
Vol 17 (3) ◽  
pp. 354-355 ◽  
Author(s):  
Atsushi MIZUIKE ◽  
Shigeki KANO
Keyword(s):  
Aqueous Solution ◽  
Freeze Concentration ◽  
Dilute Aqueous Solution
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