Polymer/Surfactant Interactions. Sodium Poly(styrene sulfonate) and CTAB Complex Formation. Light Scattering Measurements in Dilute Aqueous Solution

1994 ◽  
Vol 27 (18) ◽  
pp. 5024-5031 ◽  
Author(s):  
Johan Fundin ◽  
Wyn Brown
Keyword(s):  
Aqueous Solution ◽  
Light Scattering ◽  
Complex Formation ◽  
Styrene Sulfonate ◽  
Surfactant Interactions ◽  
Scattering Measurements ◽  
Dilute Aqueous Solution ◽  
Poly Styrene Sulfonate ◽  
Polymer Surfactant

Schiff base equilibria. II. Beryllium complexes of N-n-butylsalicylideneimine and the hydrolysis of the Be2+ ion

1965 ◽  
Vol 18 (5) ◽  
pp. 651 ◽  
Author(s):  
RW Green ◽  
PW Alexander
Keyword(s):  
Aqueous Solution ◽  
Schiff Base ◽  
Complex Formation ◽  
Distribution Coefficient ◽  
Dilute Aqueous Solution ◽  
The Stability ◽  
Ph Range ◽  
Hydrolysis Of ◽  
Beryllium Complexes ◽  
Equilibria In Aqueous Solution

The Schiff base, N-n-butylsalicylideneimine, extracts more than 99.8% beryllium into toluene from dilute aqueous solution. The distribution of beryllium has been studied in the pH range 5-13 and is discussed in terms of the several complex equilibria in aqueous solution. The stability constants of the complexes formed between beryllium and the Schiff base are log β1 11.1 and log β2 20.4, and the distribution coefficient of the bis complex is 550. Over most of the pH range, hydrolysis of the Be2+ ion competes with complex formation and provides a means of measuring the hydrolysis constants. They are for the reactions: Be(H2O)42+ ↔ 2H+ + Be(H2O)2(OH)2, log*β2 - 13.65; Be(H2O)42+ ↔ 3H+ + Be(H2O)(OH)3-, log*β3 -24.11.

Dispersion of Single and Multiwalled Nanotubes with Poly(sodium styrene sulfonate) – Effect of pH and Ionic Strength on Dispersion Stability

2014 ◽  
Vol 67 (1) ◽  
pp. 66 ◽  
Author(s):  
Christopher Hassam ◽  
David A. Lewis
Keyword(s):  
Aqueous Solution ◽  
Single Step ◽  
Protective Agent ◽  
Aqueous Dispersions ◽  
Step Process ◽  
Multiwalled Nanotubes ◽  
Styrene Sulfonate ◽  
Sodium Styrene Sulfonate ◽  
Dispersal Agent ◽  
Poly Styrene Sulfonate

Aqueous dispersions of carbon nanotubes with poly(styrene sulfonate) were investigated over a range of pH and ionic strengths as a means of determining the potential for further application of the polymer as a protective agent for the tubes. The poly(styrene sulfonate) was found to be an effective dispersal agent, capable of reducing the size of the nanotube agglomerates within an aqueous solution and dispersing the tubes in a single-step process.

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