Effect of alkanols on intermicellar concentration and on ionization of micelles

Manabe, Masahiro; Kawamura, Hideo; Yamashita, Akio; Tokunaga, Susumu

doi:10.1016/0021-9797(87)90019-1

Cited by 45 publications

(31 citation statements)

References 16 publications

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“…The Δκ decreases monotonously with the increase in C a , and the decreasing tendency becomes less remarkable with the increase in C S , and above a certain C S denoted as C S 0 , Δκ increases with the increase in C a . We have reported the similar dependence of Δκ on C a in SDS/1-alkanols system 5 , and have found that the counter-ion i.e., sodium ion concentration in SDS solutions, which was determined from electromotive force measurements using sodium ion selective electrode, decreased by the addition of 1-alkanols , and increased in C S region above the C S 0 8 . Therefore, the decrease of Δκ is attributed to the decrease of concentrations of free monomer DTAB and bromide ion associated with the depression of CMC of DTAB caused by the addition of the alkanediol, while the increase of Δκ is due to the increase of the concentration of bromide ion associated with the counter-ion i.e., bromide ion dissociation enhanced by the alkanediol solubilized in DTAB micelles.…”

Section: Resultsmentioning

confidence: 56%

“…For a given alkanediol, dκ /dC a Ca 0 increases asymptotically from negative to positive with the increase in C S . A following equation which relate dκ /dC a Ca 0 to C S was derived by Manabe et al 5 ,…”

Section: Resultsmentioning

confidence: 99%

“…9. The K x values for SDS/1-alkanols 5,6 , SDS/α,ω-alkanediols 9 , and DTAB/1- bC a , to experimental data. alkanols Kawamura, H., unpublished data systems obtained by the differential conductivity technique, and those of DTAB/1,2-alkanediols and DTAB/α,ω-alkanediols systems determined from the NMR paramagnetic relaxation enhancement experiment 10,11 were also plotted in the figure to compare with the present result.…”

Section: Resultsmentioning

confidence: 99%

“…We have utilized a differential conductivity technique for determining K x of 1-alkanols between sodium dodecylsulfate SDS micelles and water 5,6 . This technique also allowed us to determine the change of the degree of counter-ion dissociation, dα /dX a m , on SDS micelles caused by the solubilized 1-alkanols 5,6 .…”

Section: Introductionmentioning

confidence: 99%

“…This technique also allowed us to determine the change of the degree of counter-ion dissociation, dα /dX a m , on SDS micelles caused by the solubilized 1-alkanols 5,6 . The obtained dα /dX a m was used to estimate the solubilization states of 1-alkanols in SDS micelles.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of Hydroxyl Groups on Solubilization States of Alkandiols in DTAB Micelles: Application of a Differential Conductivity Technique

Kawamura¹,

Takeda²,

Tagawa³

et al. 2017

J. Oleo Sci.

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Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of Hydroxyl Groups on Solubilization States of Alkandiols in DTAB Micelles: Application of a Differential Conductivity Technique

Kawamura¹,

Takeda²,

Tagawa³

et al. 2017

J. Oleo Sci.

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A New Method for Simultaneous Estimation of Micellization Parameters from Conductometric Data

Jalšenjak

Težak

2004

Chemistry A European J

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A simple method for determination of the counterion binding parameter (alpha) and aggregation number (N) from conductivity data is proposed. The method is based on fitting the values of the first derivative of conductivity (kappa) versus total surfactant concentration (c(t)) function according to the equation derived from the mass action model (MAM) by using different conductivity models. Sodium dodecylsulphate (SDS) and dodecyltrimethylammonium bromide (DTAB) were chosen for validation of the proposed method. It was shown that the method gives a fairly accurate values for micellisation parameters of SDS (N=51-64, alpha=0.74-0.75) and DTAB (N=56-62, alpha=0.77-0.79), both in good agreement with the literature data. In addition, application of the proposed method does not require the value of the critical micelle concentration (cmc).

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Synthesis, Characterization, and Micellization Behavior of Cationic Surfactants: n‐Alkyl‐3‐Methylpyridinium Bromides and Their Drug Interaction Study by UV–Visible Spectroscopy and Conductometry

Fayyaz

Talat

Ali

et al. 2019

J Surfact & Detergents

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The synthesis of new cationic surfactants i.e., n‐hexyl‐3‐methylpyridium bromide (a) and n‐octyl‐3‐methylpyridium bromide (b), and their characterization using multinuclear nuclear magnetic resonance spectroscopy (NMR) (1H, 13C) and Fourier‐transform infrared spectroscopy (FT‐IR) spectroscopic techniques were reported. The micellization behavior of the synthesized surfactants was studied using conductometry and ultraviolet–Visible spectroscopy. The critical micelle concentration (CMC) of compounds a and b was found to be 0.41 and 0.35 m mol L−1, respectively. The effect of temperature on the CMC of these compounds was examined in the range of 298–318 K and thermodynamic parameters (ΔG, ΔH, and ΔS) of the micellization process were calculated. The antibacterial study of the synthesized surfactants revealed their strong activity against different bacterial strains. Moreover, the interaction of drugs i.e., flurbiprofen and ketoprofen, with the synthesized surfactants was investigated for gaining insights into the role of micelles as drug‐delivery devices. Drug–surfactant interactions were also confirmed via a conductometric method.

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Effect of alkanols on intermicellar concentration and on ionization of micelles

Cited by 45 publications

References 16 publications

Effect of Hydroxyl Groups on Solubilization States of Alkandiols in DTAB Micelles: Application of a Differential Conductivity Technique

Effect of Hydroxyl Groups on Solubilization States of Alkandiols in DTAB Micelles: Application of a Differential Conductivity Technique

A New Method for Simultaneous Estimation of Micellization Parameters from Conductometric Data

Synthesis, Characterization, and Micellization Behavior of Cationic Surfactants: n‐Alkyl‐3‐Methylpyridinium Bromides and Their Drug Interaction Study by UV–Visible Spectroscopy and Conductometry

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