Effect of methanol on the surface tension and viscosity of sodiumdodecyl sulfate (SDS) in aqueous medium at 298.15–323.15 K

Niraula, Tulasi Prasad; Shah, Sujit Kumar; Chatterjee, S K; Bhattarai, Ajaya

doi:10.1016/j.kijoms.2017.10.004

Cited by 32 publications

(33 citation statements)

References 31 publications

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“…The Γ max of SDS-rich in water is observed as 3.71 µmol m −2 (table 2) at 293.15 K which matched with the literature [22]. But there is a decrease in the value of Γ max with an increase of temperature as 3.36 µmol m −2 (table 2) at 298.15 K in contrast with the Γ max of 2.65 µmol m −2 of SDS in the aqueous system [35] at 298.15 K.…”

Section: Resultssupporting

confidence: 85%

“…Our data of Amin value of SDS-rich in the water is 44.70 Ao2 molecule −1 (table 2) at 293.15 K which is supported by the earlier result [22]. With increasing the temperature, the Amin value is increased as 49.37 Ao2 molecule −1 (table 2) at 298.15 K, while with anionic surfactant (SDS) in water Amin value is 62.10 Ao2 molecule −1 at 298.15 K [35].…”

Section: Resultssupporting

confidence: 71%

“…The CMC of SDS-rich decreased to a value of 6.30 mM (table 2) in contrast with the CMC of 8.30 mM of SDS [35] at 298.15 K and the CMC of DTAB-rich diminished to a value of 14.01 mM (table 2) in contrast with the CMC of 14.6 mM of DTAB [36] at 298.15 K. The decrease in CMC was observed for cationic surfactant mixtures [37], due to the synergism in mixed micelle formation that is present when a mixture of two surfactants has a CMC lower than those of both individual surfactants [38]. The CMC increase here with an increase in temperature is due to the smaller probability of the hydrogen bond formation [39].…”

Section: Resultsmentioning

confidence: 99%

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Self-assembly of sodium dodecylsulfate and dodecyltrimethylammonium bromide mixed surfactants with dyes in aqueous mixtures

et al. 2019

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The micellar property of mixed surfactant systems, cationic (dodecyltrimethylammonium bromide, DTAB) and anionic (sodium dodecylsulfate, SDS) surfactants with variable molar ratios in aqueous system has been reported by using surface tension and conductivity measurements at T = 293.15, 298.15 and 303.15 K. DTAB concentrations are varied from 1.0 × 10 −4 to 3 × 10 −4 mol l −1 in 1.0 × 10 −2 mol l −1 SDS solution while the SDS concentration is varied from 1.0 × 10 −3 to 1.5 × 10 −2 mol l −1 in approximately 5.0 × 10 −3 mol l −1 DTAB, so that such concentrations of DTAB-SDS (DTAB-rich) and SDS-DTAB (SDS-rich) solutions were chosen 3 : 1 ratio. The critical micellar concentration, as well as surface and thermodynamic properties for DTAB-rich and SDS-rich solutions, were evaluated by the surface tension ( γ ) and conductivity ( κ ) methods. The pseudo phase separation model was coupled with the dissociated Margules model for synergism. The Krafft temperature behaviour and optical analysis of mixed surfactants are studied using conductivity and UV–Vis spectroscopy, respectively. The dispersibility and stability of DTAB-rich and SDS-rich solutions with and without dyes (2.5 × 10 −5 mol l −1 of methyl orange and methylene blue) are carried out by using UV–Vis spectroscopy and dynamic light scattering.

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Section: Resultssupporting

confidence: 85%

Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

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Self-assembly of sodium dodecylsulfate and dodecyltrimethylammonium bromide mixed surfactants with dyes in aqueous mixtures

et al. 2019

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“…Also, the effect of surfactant or phospholipid addition on the self-assembled structures are investigated. 16,17 2. EXPERIMENTAL PROCEDURE…”

Section: Introductionmentioning

confidence: 99%

Manuscript-C-dots assembly at interface-041020.pdf

Zolghadr¹,

Rostami²

2020

Preprint

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We describe a systematic investigation of carbon dots (C-dots) assemblies fabricated at the liquid/air interface because of the surface tension gradient. This gradient is originally created by capillary action and increased by addition of sodium dodecyl sulfate (SDS) surfactant or 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) phospholipid to the surface of C-dots aqueous mixture. The arrangement of carbon dots in liquid bulk phase (before self-assembly) and at the surface region (after self-assembly) was examined by TEM microscopy. The presence of SDS surfactant and POPC phospholipid at the air/water interface induced the C-dots compression. In addition, molecular dynamics simulation was conducted to obtain the structure of C-dots at liquid/vapor interface. The orientation of C-dots is evaluated quantitatively at water/vapor surface by using bivariate analysis.

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“…Recently, many researchers have been focused on the aggregation and micelles formation process in the aqueous and mixed solvent system [36,37]. Earlier researchers have been focused mostly on spectroscopic and thermodynamic studies of single and mixed surfactants through UV-visible, CMC, CAC, entropy, enthalpy, Gibbs free energy, micelle ionization degree, Krafft temperature, dissociation constant, and the pre-slope and post-slope values of single and mixed surfactants in an aqueous medium and mixed solvent system at different temperatures [38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

An Interaction of Anionic- and Cationic-Rich Mixed Surfactants in Aqueous Medium through Physicochemical Properties at Three Different Temperatures

Sachin

Karpe

Singh

et al. 2018

Journal of Chemistry

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The mixed micellization of aqueous binary mixtures of DTAB-rich and SDS-rich surfactants, comprising sodium dodecyl sulfate (SDS) and dodecyltrimethylammonium bromide (DTAB) is studied in aqueous solution by using the physicochemical properties (PCPs) at three different temperatures (T = 293.15, 298.15, and 303.15 K) and P=0.1 MPa. The DTAB concentration is varied from 0.0001 to 0.03 M/mol·L−1 in the ∼0.01 M/mol·L−1 SDS solution, while the concentration of SDS is varied from 0.001 to 0.015 M/mol·L−1 in the ∼0.005 M/mol·L−1 DTAB. The stable formulations have been obtained by employing the DTAB-rich and SDS-rich surfactants solutions in 3 : 1 ratio. Therefore, different phases and aggregated states formed in the ternary combinations of DTAB/SDS/H2O have been identified and described. The calculated PCPs have been utilized for determining the nature of the solute-solvent interaction (SLS0I). With increasing surfactants concentration, the polarisation of the solution also increases along with an increase in relative viscosity (ηr), viscous relaxation time (τ), and surface excess concentration (Γmax). However, the surface area of the molecule (Amin), hydrodynamic volume (Vh), and hydrodynamic radius (Rh) decrease along with an increase in surfactants concentration.

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Effect of methanol on the surface tension and viscosity of sodiumdodecyl sulfate (SDS) in aqueous medium at 298.15–323.15 K

Cited by 32 publications

References 31 publications

Self-assembly of sodium dodecylsulfate and dodecyltrimethylammonium bromide mixed surfactants with dyes in aqueous mixtures

Self-assembly of sodium dodecylsulfate and dodecyltrimethylammonium bromide mixed surfactants with dyes in aqueous mixtures

Manuscript-C-dots assembly at interface-041020.pdf

An Interaction of Anionic- and Cationic-Rich Mixed Surfactants in Aqueous Medium through Physicochemical Properties at Three Different Temperatures

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