A conductometric investigation of hydroxypropylmethyl cellulose/sodium dodecyl sulfate/nonionic surfactant systems

Surfactant mixtures are very often used in various cosmetic and pharmaceutical products because they commonly act in synergism and provide more favorable properties than the single surfactants. At the same time, the 9 presence of polymers in mixtures of surfactants may lead to molecular interactions thereby affecting product stability and activity. For these reasons it is very important to determine the surfactant interactions influence on 1micellization and mixed micellization, as well as polymer-surfactants mixed micelles interactions. In this work we examined self-aggregation of nonionic surfactants, polysorbate 20 (Tween 20), polyoxyethylene octylphenyl ether (Triton X100) and polyoxyethylene-polyoxypropylene block copolymer (Pluronic F68) with ionic surfactant, sodium dodecylsulfate, in aqueous solution at 40?C using conductometric titration method. It was found that concentration region for mixed micelle formation depends on nonionic surfactant characteristics and its concentration. Formation of surfactants mixed micelles in the presence of nonionic polymer, hydroxypropylmethyl cellulose, and their binding to polymer hydrophobic sites, were investigated too. Analysis of obtained results points to different kinds of interactions in investigated systems, which are crucial for their application.

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Separation and determination of anesthetics by capillary electrophoresis with mixed micelles of sodium dodecyl sulfate and Tween 20 using electrochemiluminescence detection

Luminescence ◽

10.1002/bio.2414 ◽

2012 ◽

Vol 28 (5) ◽

pp. 673-678 ◽

Cited By ~ 6

Author(s):

Yan-Ming Liu ◽

Jie Li ◽

Yang Yang ◽

Jun-Jun Du

Keyword(s):

Capillary Electrophoresis ◽

Sodium Dodecyl Sulfate ◽

Mixed Micelles ◽

Sodium Dodecyl ◽

Tween 20 ◽

Dodecyl Sulfate

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Separation and selectivity in micellar electrokinetic chromatography using sodium dodecyl sulfate micelles or Tween 20-modified mixed micelles

Analytica Chimica Acta ◽

10.1016/j.aca.2004.05.086 ◽

2004 ◽

Vol 519 (1) ◽

pp. 73-78 ◽

Cited By ~ 12

Author(s):

Miao Wang ◽

Dan Wu ◽

Qi Yao ◽

Xueyou Shen

Keyword(s):

Sodium Dodecyl Sulfate ◽

Micellar Electrokinetic Chromatography ◽

Mixed Micelles ◽

Sodium Dodecyl ◽

Tween 20 ◽

Electrokinetic Chromatography ◽

Dodecyl Sulfate

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Changes in phospholipid bilayers caused by sodium dodecyl sulfate/nonionic surfactant mixtures

Journal of the American Oil Chemists Society ◽

10.1007/s11746-997-0112-2 ◽

1997 ◽

Vol 74 (1) ◽

pp. 9-17 ◽

Cited By ~ 4

Author(s):

Alfonso de la Maza ◽

Jose Luis Parra

Keyword(s):

Sodium Dodecyl Sulfate ◽

Nonionic Surfactant ◽

Sodium Dodecyl ◽

Phospholipid Bilayers ◽

Surfactant Mixtures ◽

Dodecyl Sulfate

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Dispersion, sedimentation and aggregation of multi-walled carbon nanotubes as affected by single and binary mixed surfactants

Royal Society Open Science ◽

10.1098/rsos.190241 ◽

2019 ◽

Vol 6 (7) ◽

pp. 190241 ◽

Cited By ~ 5

Author(s):

Helian Li ◽

Yanhua Qiu

Keyword(s):

Carbon Nanotubes ◽

Sodium Dodecyl ◽

Water Environment ◽

Ring Structure ◽

Ionic Surfactant ◽

Mixed Surfactants ◽

Surfactant Mixtures ◽

Multi Walled Carbon Nanotubes ◽

Dispersing Ability ◽

Walled Carbon Nanotubes

Two commonly used dispersants, octyl phenol ethoxylate (Triton X-100) and sodium dodecyl sulfate (SDS), were employed to explore the effects of single or mixed surfactants on the dispersion, sedimentation and aggregation of multi-walled carbon nanotubes (MWCNTs). Non-ionic surfactant TX100 showed much superior capability to anionic surfactant SDS in dispersing MWCNTs due to the benzene ring structure in its tail group. The addition of SDS reduced the adsorption of TX100 on the surface of MWCNTs and the consequent suspension of MWCNTs. The dispersing ability of TX100–SDS binary mixture was between those of individual SDS and TX100. The introduction of SDS greatly retarded the sedimentation and aggregation of suspended MWCNTs. The critical coagulation concentration (CCC) values of suspended MWCNTs dispersed by TX100 (2000 mg l −1 ), SDS (2000 mg l −1 ) and TX100–SDS (2000 mg l −1 of each component) were 48.6, 398 and 324 mM, respectively, for Na + treatments. The CCC values were much lower for Ca 2+ treatments, which were 30.4 and 32.1 mM, respectively, for MWCNTs dispersed by TX100 and TX100–SDS mixture. Overall, these results demonstrated that although the introduction of SDS did not improve the ability of TX100 in suspending MWCNTs, the suspensions exhibited more stable properties than those dispersed by TX100 alone. Our findings have important implications for the design of surfactant mixtures and the prediction of the behaviour and fate of MWCNTs in the water environment.

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Conductometric study of sodium dodecyl sulfate - nonionic surfactant (Triton X-100, Tween 20, Tween 60, Tween 80 or Tween 85) mixed micelles in aqueous solution

Hemijska industrija ◽

10.2298/hemind110612059c ◽

2012 ◽

Vol 66 (1) ◽

pp. 21-28 ◽

Cited By ~ 32

Author(s):

Dejan Cirin ◽

Mihalj Posa ◽

Veljko Krstonosic ◽

Maja Milanovic

Keyword(s):

Sodium Dodecyl Sulfate ◽

Synergistic Effect ◽

Nonionic Surfactants ◽

Mixed Micelles ◽

Sodium Dodecyl ◽

Tween 80 ◽

Tween 20 ◽

Dodecyl Sulfate ◽

Tween 60 ◽

Triton X

The present study is concerned with the determination of the critical micelle concentration (cmc) of mixed micelles of sodium dodecyl sulfate with one of five nonionic surfactants (Triton X-100, Tween 20, Tween 60, Tween 80 or Tween 85) from conductance measurements. Based on the calculated values of the ? parameters we have noticed that SDS-nonionic surfactants mostly showed strong synergistic effect. It was found that nonionic surfactants with mainly longer and more hydrophobic tail show stronger interactions with hydrophobic part of SDS, thus expressing stronger synergism. In SDS-Tween 80 binary system the strongest synergistic effect was noticed. SDS-Tween 85 micellar system showed antagonistic effect, most probably because the presence of the double bond in its three hydrophobic tails (three C18 tails) makes it sterically rigid.

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