Binary mixtures of nonionic gemini-surfactants surfynol® 400 series with sodium lauryl sulfate. Wetting of the low-energy surface

2020 ◽  
Author(s):  
Yu. A. Penkina ◽  
D. S. Masterenko
Keyword(s):  
Binary Mixtures ◽  
Sodium Lauryl Sulfate ◽  
Energy Surface ◽  
Gemini Surfactants ◽  
Low Energy ◽  
Lauryl Sulfate

Experimental Study of Surfactant Effects on Pool Boiling Heat Transfer

1990 ◽  
Vol 112 (1) ◽  
pp. 207-212 ◽  
Author(s):  
Ying Liang Tzan ◽  
Yu Min Yang
Keyword(s):  
Heat Transfer ◽  
Binary Mixtures ◽  
Boiling Heat Transfer ◽  
Sodium Lauryl Sulfate ◽  
Pool Boiling ◽  
Nucleate Boiling ◽  
Additive Concentration ◽  
Lauryl Sulfate ◽  
Diffusion Effect ◽  
Nucleate Boiling Heat Transfer

In the first part of this work, nucleate boiling of aqueous solutions of sodium lauryl sulfate (SLS) over relatively wide ranges of concentration and heat flux was carried out in a pool boiling apparatus. The experimental results show that a small amount of surface active additive makes the nucleate boiling heat transfer coefficient h considerably higher, and that there is an optimum additive concentration for higher heat fluxes. Beyond this optimum point, further increase in additive concentration makes h lower. In the second part of this work, nucleate boiling heat transfer rate for n-propanol-water binary mixtures with various amounts of sodium lauryl sulfate were measured in the same pool boiling apparatus. The importance of the mass diffusion effect, which is caused by preferential evaporation of the more volatile component at the vapor-liquid interface on the boiling of the binary mixture, has been confirmed. However, it is shown that the effect exerted by the addition of a surfactant dominates over the mass diffusion effect in dilute binary mixtures.

ASSESSMENT OF THE TOXICITY AND HAZARD OF SODIUM LAURYL SULFATE AT DIFFERENT EXPOSURE ROUTES

2020 ◽  
pp. 56-59
Author(s):  
M. V. Bidevkina ◽  
M. I. Golubeva ◽  
A. V. Limantsev ◽  
I. N. Razumnaya ◽  
T. N. Potapova ◽  
...  
Keyword(s):  
Sodium Lauryl Sulfate ◽  
Exposure Level ◽  
Hazardous Substance ◽  
Lauryl Sulfate ◽  
Upper Respiratory Tract ◽  
Mucous Membranes ◽  
Chloroprene Rubber ◽  
Upper Respiratory ◽  
Exposure Routes ◽  
Number Of Cells

Sodium lauryl sulfate is the most common surfactant used in the production of detergents, chloroprene rubber, plastics, artificial furs and in pharmaceutical industry. Sodium lauryl sulfate is a moderately hazardous substance when introduced into the stomach (DL50 for white mice and rats is in the range of 2086-2700 mg/kg), has a pronounced local irritant effect on the skin and mucous membranes of the eyes, has a skin-resorptive, sensitizing and pronounced cumulative effects. The threshold for acute inhalation action is set at 15,3 mg/m3 for changes in the function of the nervous system and irritating effects on the mucous membranes of the upper respiratory tract (an increase in the total number of cells in the nasal flushes).Recommended for approval tentative safe exposure level of sodium lauryl sulfate in the air of the working area is 0.2+ mg/m3 (aerosol).

scholarly journals Preparation of alkali-resistant PVDF membranes via immobilization of sodium lauryl sulfate (SDS) on surface

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Gongpu Wen ◽  
Kun Chen ◽  
Yanhong Zhang ◽  
Yue Zhou ◽  
Jun Pan ◽  
...  
Keyword(s):  
Sodium Lauryl Sulfate ◽  
Alkali Treatment ◽  
Membrane Surface ◽  
Alkali Resistance ◽  
Lauryl Sulfate ◽  
Uv Curable ◽  
Pvdf Membrane ◽  
Glycol Diacrylate ◽  
Polyester Acrylate ◽  
Uv Curable Resin

AbstractA novel strategy was proposed to fabricate alkali-resistant PVDF membrane via sodium lauryl sulfate (SDS) attached to the surface of membrane and immobilized by UV-curable polyester acrylate and tri(propylene glycol) diacrylate (TPGDA). The attached anionic surfactant, SDS, on the membrane surface can resist the alkali corrosion by NaOH, and the curing of the resin can immobilize the SDS on the membrane firmly. Due to the unique alkali resistance of SDS and resin formed, the UV-curable resin-modified PVDF membrane showed greatly enhanced alkali-resistant ability. Characterization of SEM and FTIR showed that polyester acrylate and TPGDA were cured successfully under the action of 1-hydroxycyclohexyl phenyl ketone (184) and ultraviolet light. Whiteness, differential scanning calorimeter and X-ray photoelectron spectrometer characterization showed that the modified PVDF membrane had a lower degree of dehydrofluorination than the pristine PVDF membrane after alkali treatment. Results of the detailed alkali-resistant analysis indicated that the F/C ratio of the UV-curable resin-modified PVDF membrane decreased by 2.6% after alkali treatment compared to pristine PVDF membrane decreased by 19.28%. The alkali-resistant performance was mainly attributed to the immobilized SDS. This study provided a facile and scalable method for designing alkali-resistant PVDF membrane, which shows a promising potential in the treatment of alkaline wastewater and alkaline-cleaning PVDF membrane.

Sodium Lauryl Sulfate in Egg Whites

1967 ◽  
Vol 50 (4) ◽  
pp. 847-849
Author(s):  
John Wiskerchen
Keyword(s):  
Chloride Solution ◽  
Sodium Lauryl Sulfate ◽  
Collaborative Study ◽  
Egg White ◽  
Chloride Complex ◽  
Bromphenol Blue ◽  
Lauryl Sulfate ◽  
Benzethonium Chloride ◽  
Alkyl Sulfates

Abstract A method is given for the quantitative determination of sodium lauryl sulfate in liquid, frozen, powdered, or flake-dried egg white. The egg white is dissolved in water and the protein is precipitated with ethanol and filtered off. The filtrate is evaporated, the residue is dissolved in water, and the pH is adjusted to 5.0. Total alkyl sulfates are titrated with standard benzethonium chloride solution in the presence of chloroform with bromphenol blue indicator. Results are calculated as sodium lauryl sulfate. The formation of the bromphenol bluebenzethonium chloride complex, when excess benzethonium chloride is present, is taken as the end point. The blue-green complex is soluble in the chloroform. Overall recoveries of sodium lauryl sulfate from egg whites ranged from 94 to 100%. Collaborative study of the method is recommended.

Oral Fluoride Levels 1 h after Use of a Sodium Fluoride Rinse: Effect of Sodium Lauryl Sulfate

2015 ◽  
Vol 49 (3) ◽  
pp. 291-296 ◽  
Author(s):  
Gerald L. Vogel ◽  
Gary E. Schumacher ◽  
Laurence C. Chow ◽  
Livia M.A. Tenuta
Keyword(s):  
Sodium Fluoride ◽  
Sodium Lauryl Sulfate ◽  
Lauryl Sulfate ◽  
Fluoride Release ◽  
Important Goal ◽  
Oral Fluids ◽  
Surrogate Measure ◽  
Significant Change ◽  
Topical Fluoride

Increasing the concentration of free fluoride in oral fluids is an important goal in the use of topical fluoride agents. Although sodium lauryl sulfate (SLS) is a common dentifrice ingredient, the influence of this ion on plaque fluid and salivary fluid fluoride has not been examined. The purpose of this study was to investigate the effect of SLS on these parameters and to examine the effect of this ion on total (or whole) plaque fluoride, an important source of plaque fluid fluoride after a sufficient interval following fluoride administration, and on total salivary fluoride, a parameter often used as a surrogate measure of salivary fluid fluoride. Ten subjects accumulated plaque for 48 h before rinsing with a 12 mmol/l NaF (228 µg/g F) rinse containing or not containing 0.5% (w/w) SLS. SLS had no statistically significant effect on total plaque and total saliva fluoride but significantly increased salivary fluid and plaque fluid fluoride (by 147 and 205%, respectively). These results suggest that the nonfluoride components of topical agents can be manipulated to improve the fluoride release characteristics from oral fluoride reservoirs and that statistically significant change may be observed in plaque fluid and salivary fluid fluoride concentrations that may not be observed in total plaque and total saliva fluoride concentrations.

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