Review on chemically bonded geminis with cationic heads: second-generation interfactants

Mondal, Monohar Hossain; Roy, Ankit; Malik, Susanta; Ghosh, Aniruddha; Saha, Bidyut

doi:10.1007/s11164-015-2125-z

Cited by 45 publications

(28 citation statements)

References 73 publications

(81 reference statements)

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“…Being low cmc value, gemini surfactant implies as a high cost-effective surfactant. From an environmental point of view, they can be regarded as a green surfactant due to the use of smaller surfactant quantities, which are in line with the green surfactant idea in surfactant chemistry [25,26]. The nature, mode of action and mechanism of 16-s-16 surfactant on the interaction of ninhydrin with histidine may be a matter of great consideration.…”

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confidence: 89%

Catalytic influence of 16- s -16 gemini surfactants on the rate constant of histidine and ninhydrin

Kumar

Rub

2020

R. Soc. open sci.

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The present paper reports the catalytic influence of 16-s-16 (spacer (s) = 4, 5, 6) gemini surfactants on the rate constant of histidine and ninhydrin at 343 K and pH 5.0 using the spectrophotometric technique. The effect of varying amounts of geminis was made on the rate constant of histidine and ninhydrin keeping other constituents constant. Characteristics of the rate constant (k ψ ) versus [gemini] depict the effect of surfactants on the rate constant. A systematic explanation about the effect of surfactants is revealed and discussed in the text. The influence of different parameters that includes [reactants], temperature and pH has also been performed on the study. In order to determine the critical micelle concentration (cmc) of pure surfactants and their solution mixtures, conductivity measurement was employed. By using the Eyring equation, activation parameters at different temperatures have been obtained. The resultant data of k ψ versus [gemini] plot were rationalized with the pseudo-phase model of micelles.

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confidence: 89%

Catalytic influence of 16- s -16 gemini surfactants on the rate constant of histidine and ninhydrin

Kumar

Rub

2020

R. Soc. open sci.

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“…There is another class of novel surfactant identified by Menger and Littau in 1991, containing more than one hydrophilic group linked by a spacer (Figure ) . This spacer groups enhances the hydrophobic nature of the Gemini surfactants compared to the monomeric surfactants . The hydrophilic heads may be cationic, anionic and neutral or zwitter ionic in nature and the hydrophobic tail may be long or short in size.…”

Section: Classificationmentioning

confidence: 99%

Novel Amphiphiles and Their Applications for Different Purposes with Special Emphasis on Polymeric Surfactants

et al. 2019

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Amphiphiles or surfactants are widely known for its reducing power of interfacial tension and extraordinary rheological properties. Among the various classes of surfactants gemini surfactants, biosurfactants and polymeric surfactants are remarkable and distinguishable among the others for their structural diversity and profitable usefulness. Primarily, the performance of any surfactant can be determined by HLB (Hydrophile Lipophile Balance) value, an empirical parameter. This review attempts to clarify some of the terminology used in literature by providing illustration of classification, features and diverse applications of different surfactants.

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“…Now, the polar heads of the adsorbed surface-active ions are toward the aqueous solution, which increases the hydrophilicity of the coal dust surface and decreases the contact angle [20]. Because cationic surfactants frequently form such adsorbed layers on the surface of coal dust, they are not suitable as wetting agents for it [28]. As shown in Figure 10(b), in the adsorption process of anionic surfactant AOS and coal dust, the hydrophobic surface of the coal dust interacts strongly with the hydrophobic groups of the surfactant; therefore, they adsorb the coal dust surface as the tail hydrophobic group gets directed toward the surface of the coal dust and the head anionic hydrophilic group becomes directed toward the solution.…”

Section: Adsorption Of Surfactant Molecules On Coal Dustmentioning

confidence: 99%

Wetting Process and Adsorption Mechanism of Surfactant Solutions on Coal Dust Surface

Wang

Yuan

Jiang

2019

Journal of Chemistry

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To determine the wetting process and wetting mechanism of different surfactant solutions on coal dust surface, four types of surfactants (anionic surfactant 1227, anionic surfactant AOS, amphoteric surfactant CAB-35, and nonionic surfactant CDEA) are selected to measure their surface tension and contact angle. Based on the data, the adhesion work, spreading coefficient, and immersion work of the surfactant solutions on a coal dust surface are calculated and their adsorption mechanism is discussed. e results show that the surface tension and contact angle of AOS and CDEA are lower and smaller, respectively, their calculated spreading coefficients are higher, and their adhesion work and immersion work are less than those of 1227 and CAB-35. is shows that the wettability of the AOS and CDEA solutions for a coal dust surface is more than that of 1227 and CAB-35, whereas their adhesion is lower than that of the latter. e spreading coefficient can be used as an index to determine the wettability. e wetting ability of the AOS and CDEA aqueous solutions for coal dust is stronger than that of 1227 and CAB-35 because of the different adsorption forms of the surfactant molecules on the surface of the coal dust. e tail hydrophobic group of the AOS and CDEA surfactant molecules orient to the surface of the coal dust, whereas the head hydrophilic group directs to the solution, being easier to wet. e results show that anionic and nonionic surfactant solutions can significantly improve the wettability of a coal dust surface, providing a theoretical basis for selecting suitable surfactants as water-spray additives to improve the dust suppression efficiency.

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Review on chemically bonded geminis with cationic heads: second-generation interfactants

Cited by 45 publications

References 73 publications

Catalytic influence of 16- s -16 gemini surfactants on the rate constant of histidine and ninhydrin

Catalytic influence of 16- s -16 gemini surfactants on the rate constant of histidine and ninhydrin

Novel Amphiphiles and Their Applications for Different Purposes with Special Emphasis on Polymeric Surfactants

Wetting Process and Adsorption Mechanism of Surfactant Solutions on Coal Dust Surface

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