Clouding Behavior and Thermodynamic Study of Nonionic Surfactants in Presence of Additives

Parikh, Jigisha; Rathore, Jitendra S.; Bhatt, Dhananjay V.; Desai, Meghal A.

doi:10.1080/01932691.2012.749183

Cited by 44 publications

(15 citation statements)

References 21 publications

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“…For a certain concentration of Tw 80 mixture having different contents of diols (Table and Tables S2 and S3), the values of ∆ H 0 c and ∆ S 0 c were found to be negative over the range of concentration of diols studied, and the negative values of ∆ H 0 c and ∆ S 0 c were observed to be decreased with the enhancing of content of diols. Negative Δ H 0 c as well asΔ S 0 c were also noticed previously in case of clouding phenomena of some nonionic surfactant system in water as well as in attendance of electrolyte . Rub et al found negative values of Δ H 0 c as well as Δ S 0 c for CP of some amphiphilic drugs in the participation of Tw 80 as well as in presence of other additives mixed system .…”

Section: Resultssupporting

confidence: 60%

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Impact of different diols/polyols on the phase separation behavior as well as thermodynamic properties of tween 80

Mishu

Amin

Rub

et al. 2019

J of Physical Organic Chem

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Herein, the cloud points (CPs) of tween 80 (Tw 80) in water/(water + diols [ethanediol, propanediol, and butanediol])/(water + polyols [glucose, fructose, and sorbitol]) systems were measured. For diols‐Tw 80‐water system and polyols‐Tw 80‐water system, the CP values were obtained to reduce gradually with increasing content of diols and polyols at a particular concentration of Tw 80. For a certain concentration of Tw 80 having different contents of diols, the observed ∆H0c, as well as ∆S0c values, were negative over the range of concentration of diols studied, and the negative values of ∆H0c and ∆S0c were reduced with the enhancement of the content of diols. The values of ∆H0c were negative, which indicate the process was exothermic. The clouding process of Tw 80 in the presence of different diols is mainly enthalpy‐controlled process, while the contributions of enthalpy tend to reduce with enhancing of the contribution of diols. In the case of polyols‐Tw 80 mixture in an aqueous environment, the ∆Gc0 values were achieved positive. The values of ∆Hc0 and ∆Sco were obtained negative for studied systems, while the negative values reduce with enhancing of polyol (glucose and fructose) concentrations. For sorbitol‐Tw 80 system, the values of ∆Hc0 were observed to be negative and the negative magnitudes reduce with enhancing of sorbitol concentrations. The thermodynamic parameters of transfer are also evaluated and illustrated in detail.

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Section: Resultssupporting

confidence: 60%

“…The values of ∆ G 0 c Tw 80 + diol were found to be positive which are indicative of the nonspontaneous character of clouding . The positive ∆ G 0 c values are achieved to reduce through rising concentration of diols in all the cases which show that the nonspontaneity tend to decrease with the enhancement of diols content.…”

Section: Resultsmentioning

confidence: 82%

Impact of different diols/polyols on the phase separation behavior as well as thermodynamic properties of tween 80

Mishu

Amin

Rub

et al. 2019

J of Physical Organic Chem

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“…The positive values of standard free energy (DG c ) change of both (6.18 and 15.45) Á 10 À2 mol Á L À1 TX-100 solutions containing various diol concentrations indicate the processes were non spontaneous [15,30,31]. The positive DG c values were decreased with increasing the concentration of diols for both (6. The uncertainty of DG c , DH c and DS c values are: ±(0.02 to 0.1) kJ Á mol À1 ; ±: ±(0.02 to 0.05) Á 10 2 kJ Á mol À1 and ±(0.02 to 0.04) Á 10 2 J Á mol À1 Á K À1 respectively.…”

Section: Resultsmentioning

confidence: 97%

“…The thermodynamic parameters such as standard free energy (DG c ), enthalpy (DH c ) and entropy (DS c ) change for the clouding processes have been calculated considering the solubility limit at the clouding temperature by the phase separation model and using the following relationships [15,[30][31][32]:…”

Section: Resultsmentioning

confidence: 99%

Physicochemical investigation of the clouding behavior and thermodynamics of p-tert-alkylphenoxy poly (oxyethylene) ether micelles in aqueous environment and in the presence of diols

Khan

Hoque

Islam

2015

The Journal of Chemical Thermodynamics

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“…Different thermodynamic parameters, e.g., free energy of clouding (

{∆ G}_{c}^{o}

), enthalpy of clouding (

{∆ H}_{c}^{o}

), and entropy of clouding (

{∆ S}_{c}^{o}

) associated with the clouding behavior of TX‐100/TX‐100 + CFH in different solvents can be calculated from the following equations (Batigöc et al, ; Mahajan et al, ; Naqvi et al, ; Parikh et al, ; Wang et al, ):

{∆ G}_{c}^{o} = - italicRT \ln X_{s}

{∆ H}_{c}^{o} = R T^{2} ((), \partial \ln X_{s}) / \partial T

{∆ S}_{c}^{o} = ((), {∆ H}_{c}^{o} - {∆ G}_{c}^{o}) / T

…”

Section: Resultsmentioning

confidence: 99%

Influence of Different Additives on the Interaction of Quinolone Antibiotic Drug with Surfactant: Conductivity and Cloud Point Measurement Study

Rahim

Mahbub

Islam

et al. 2019

J Surfact & Detergents

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Conductometric and cloud point (CP) measurement studies have been performed to investigate the interaction of tetradecyltrimethylammonium bromide (TTAB) and Triton® X‐100 (TX‐100) with ciprofloxacin hydrochloride (CFH) in different solvents over the temperature range of 295.15–315.15 K. CFH is used for the treatment of various bacterial infections. The observed critical micelle concentration (CMC) values of TTAB were found to be reduced in the presence of electrolytes (Na2SO4/Na3PO4), and this reduction proceeds with the elevation of salt concentration. The order of the CMC of TTAB follows the trend: cmcH2normalO > cmcNa3PO4 >cmcNa2SO4. The observed CMC values of TTAB were found to increase with increasing temperature and decrease with increasing concentration of CFH in aqueous medium. The values of Gibbs free energy of micellization (∆Gmo) for the TTAB/TTAB + CFH mixture were found to be negative, implying spontaneous micellization. The estimated CP of TX‐100 decreases with increasing concentration of TX‐100 in aqueous medium. The CP values first decrease with increasing concentration of CFH and then increase at higher concentration of CFH almost in all cases investigated. The values of free energy of clouding were found to be positive in all cases studied implying that phase separation of TX‐100 was nonspontaneous. The other thermodynamic parameters associated with the micellization of TTAB and the phase separation of TX‐100 were estimated and explained.

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Clouding Behavior and Thermodynamic Study of Nonionic Surfactants in Presence of Additives

Cited by 44 publications

References 21 publications

Impact of different diols/polyols on the phase separation behavior as well as thermodynamic properties of tween 80

Impact of different diols/polyols on the phase separation behavior as well as thermodynamic properties of tween 80

Physicochemical investigation of the clouding behavior and thermodynamics of p-tert-alkylphenoxy poly (oxyethylene) ether micelles in aqueous environment and in the presence of diols

Influence of Different Additives on the Interaction of Quinolone Antibiotic Drug with Surfactant: Conductivity and Cloud Point Measurement Study

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