Effects of urea and a nonionic surfactant on the micellization and counterion binding properties of cetyltrimethyl ammonium bromide and sodium dodecyl sulfate

1989 ◽  
Vol 267 (3) ◽  
pp. 246-254 ◽  
Author(s):  
P. K. Das Gupta ◽  
S. P. Moulik
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Nonionic Surfactant ◽  
Sodium Dodecyl ◽  
Ammonium Bromide ◽  
Cetyltrimethyl Ammonium Bromide ◽  
Binding Properties ◽  
Counterion Binding ◽  
Dodecyl Sulfate ◽  
Cetyltrimethyl Ammonium

Influence of Surfactants on the properties of electroless nickel boron (thallium and lead-free) coatings

2016 ◽  
Vol 232 (1) ◽  
pp. 12-22 ◽  
Author(s):  
M Vijayanand ◽  
R Elansezhian
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Sodium Dodecyl ◽  
Electroless Nickel ◽  
Lead Free ◽  
Ammonium Bromide ◽  
Cetyltrimethyl Ammonium Bromide ◽  
Average Roughness ◽  
Heat Treated ◽  
Dodecyl Sulfate ◽  
Cetyltrimethyl Ammonium

Electroless nickel boron coatings were prepared from thallium and lead-free alkaline bath. The influence of surfactants on the properties of electroless nickel boron coatings was studied. Three surfactants namely sodium dodecyl sulfate, cetyltrimethyl ammonium bromide and 3-(N, N–Dimethylmyristylammonio) propanesulfonate were used. Morphology, microhardness, surface finish, topography and corrosion resistance of the coatings were evaluated. Electroless nickel boron coatings with addition of surfactant sodium dodecyl sulfate, cetyltrimethyl ammonium bromide and 3-(N, N-Dimethylmyristylammonio) propanesulfonate results in a smooth surface, with an average roughness value (Ra) of 0.220 µm for cetyltrimethyl ammonium bromide, 0.198 µm for sodium dodecyl sulfate and 0.174 µm for 3-(N, N-Dimethylmyristylammonio) propanesulfonate which are less than the Ra without surfactant addition (0.256 µm). The deposits had a microhardness value of 590 and 743 HV in the as-plated and heat-treated conditions, respectively. With addition of sodium dodecyl sulfate, cetyltrimethyl ammonium bromide and 3-(N, N-Dimethylmyristylammonio) propanesulfonate, a significant improvement in the microhardness is observed. Potentiodynamic polarization tests were carried out in 3.5 wt% NaCl to determine the real anticorrosion performance of the electroless nickel boron deposits. The entire experimental procedure, the results achieved, and their investigation are presented in this paper.

Influence of Different Dispersants on the Dispersion Property of Nano-Aluminium Powders

2011 ◽  
Vol 71-78 ◽  
pp. 122-125 ◽  
Author(s):  
Ling Li Song ◽  
Ren Yuan Zhang ◽  
Ling Bo Mao ◽  
Wen Jie Zhu ◽  
Miao Yan Zheng
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Ultrasonic Vibration ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Sodium Dodecyl ◽  
Dispersion Property ◽  
Ammonium Bromide ◽  
Aluminum Powders ◽  
Ultrasonic Time ◽  
Dodecyl Sulfate ◽  
Cetyl Trimethyl Ammonium

The influences of dispersant type, supersonic time and concentration on the dispersion property of the nano-aluminium powders in glycol water were systematically studied by using Sodium dodecyl sulfate (SDS)，cetyl trimethyl ammonium bromide (CTAB) and sodium hexa metah posphate（SHMP）as dispersants. During the first stage of the experiments, influences of dispersant type and ultrasonic time with these dispersants were evaluated. The next stage of the study was focused on SHMP concentration. The influence of SHMP concentration was assessed. The results show that with the increasing of ultrasonic time, the dispersion property of nano-aluminum powders first increases and then decreases, and SHMP is the best one. The excellent dispersing condition on the dispersion property of nano-aluminium is: 5g/L SHMP and 50 min ultrasonic vibration.

Spontaneous Formation of DTAB/SLS Vesicles

2014 ◽  
Vol 881-883 ◽  
pp. 734-737
Author(s):  
Jian Sun ◽  
Hong Yun Li ◽  
Dong Hui Li ◽  
Bing Shao ◽  
Lin Lin Cui
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Scale Effect ◽  
Sodium Dodecyl ◽  
Ammonium Bromide ◽  
Complex Formulation ◽  
Structure And Morphology ◽  
Spontaneous Formation ◽  
Dodecyl Sulfate ◽  
Dodecyl Trimethyl Ammonium Bromide ◽  
The Stability

Dodecyl trimethyl ammonium bromide/sodium dodecyl sulfate (DTAB/SLS) complex formulation of scale effect on the spontaneous formation of vesicles and the influence of different factors on the stability of vesicles were discussed, structure and morphology of vesicles were observed.

scholarly journals Virus Passage through Track-Etch Membranes Modified by Salinity and a Nonionic Surfactant

1999 ◽  
Vol 65 (6) ◽  
pp. 2773-2775 ◽  
Author(s):  
C. David Lytle ◽  
Licia B. Routson ◽  
Nisha B. Jain ◽  
Matthew R. Myers ◽  
Barbara L. Green
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Nonionic Surfactant ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
Electrostatic Repulsion ◽  
Virus Adsorption ◽  
Dodecyl Sulfate ◽  
Polycarbonate Membranes ◽  
Pass Through ◽  
Track Etch

ABSTRACT Why do viruses sometimes not pass through larger pores in track-etch filters? Increasing the salinity (0.8 to 160 mM Na+) decreased φX174 and PRD1 passage through track-etch polycarbonate membranes (sodium dodecyl sulfate coated but not polyvinylpyrrolidone coated) and PRD1 passage through polyester membranes. Undiminished passage when 0.1% Tween 80 was added implied that nonionic virus adsorption occurred and indicated that high levels of salinity decreased virus passage by decreasing electrostatic repulsion that prevented adsorption.

The Mechanical Properties of the Cell Surface

1956 ◽  
Vol 33 (3) ◽  
pp. 524-532
Author(s):  
J. M. MITCHISON
Keyword(s):  
Mechanical Properties ◽  
Calcium Ions ◽  
Sodium Dodecyl ◽  
The Other ◽  
Ammonium Bromide ◽  
Zinc Ions ◽  
Cetyltrimethyl Ammonium Bromide ◽  
Respiratory Inhibitors ◽  
Membrane Rigidity ◽  
Cetyltrimethyl Ammonium

Measurements were made with the cell elastimeter on the effect of a number of reagents and of changes in pH on the rigidity of the cell membrane of unfertilized sea-urchin eggs. The membrane rigidity was increased by dithiopropanol, thioglycollate, chloracetophenone, a polyethanoxide and zinc ions. It was lowered by trypsin, cetyltrimethyl ammonium bromide and sodium dodecyl sulphate. Most of the other reagents, including respiratory inhibitors and calcium ions, had no effect. The membrane has a minimum rigidity at a pH of about 5.7.

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