Solubilization potentials of single and mixed oppositely charged gemini surfactants: A case of polycyclic aromatic hydrocarbons

Yadav, Sanjay Kumar; Parikh, Kushan; Kumar, Sanjeev

doi:10.1016/j.colsurfa.2016.11.042

Cited by 29 publications

(20 citation statements)

References 38 publications

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“…Since ionic groups of surfactant molecules are covalently coupled, the electrostatic repulsion among ionic groups is effectively neutralized, and the distance among hydrophobic chains is greatly shortened. As some results [93,94,95,96], the assembly of oligomeric surfactants on the water-air interface is more compact and orderly, and some unique properties including lower critical micelle concentration (CMC), higher surface activity and higher foaming capacity, and its effect on strength, is also low. For example, adding nano-silica to cationic oligomeric surfactant can not only produces synergistic effects in both foaming capacity and foam stability, but also promotes cement secondary hydration to increase concrete strength.…”

Section: Improvement Techniquesmentioning

confidence: 99%

Impacts of Low Atmospheric Pressure on Properties of Cement Concrete in Plateau Areas: A Literature Review

et al. 2019

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Low atmospheric pressure (LAP) can enormously affect properties of cement concrete in plateau areas. There are fewer studies and attendances on this issue than those of cement concrete in normal atmospheric pressure (AP), because of the limitations of both environmental conditions and instruments. In order to improve properties of cement concrete under LAP, influences of LAP on properties of cement concrete were reviewed in this work. The influence rules and mechanism on properties of cement concrete were summarized. The corresponding mechanism and techniques were put forward for enhancing the properties of cement concrete. The results of researchers show that LAP can significantly reduce the air entraining ability of the air entraining agent (AEA). Air content in concrete linearly decreases with the decrease of AP when other conditions are constant. If the initial air content is high, the decrease rate of air content increases with the decrease of AP. When the initial air content in cement concretes is similar, the greater the slump of cement concrete, the stronger its resistance to the decrease of air content caused by the decrease of AP. In addition, the condition of the bubble characteristics of hardened cement concrete under LAP is worse than that under normal AP. Therefore, the change of concrete properties under LAP is mainly attributed to these bubble characteristics, such as air content, bubble spacing coefficient, bubble radius and bubble specific surface area. In this work, nano-silica (negative charges) with cationic oligomeric surfactants is recommended as a new type of AEA to optimize the bubble characteristics under LAP in plateau areas.

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Section: Improvement Techniquesmentioning

confidence: 99%

Impacts of Low Atmospheric Pressure on Properties of Cement Concrete in Plateau Areas: A Literature Review

et al. 2019

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“…Gemini surfactants contains two hydrophobic tails and two hydrophilic heads connected by a spacer at or near the two head ( Figure 1) [2]. These chemical structure modifications grant them excellent properties namely, low CMC, high aqueous solubility and viscosity, unique micelle structure and aggregation behaviour and high yield in decreasing the surface tension of water solutions [3][4][5][6][7][8][9][10][11][12]. As the CMC is an important parameter to characterize surfactants, their measurement is usually difficult and costly.…”

Section: Introductionmentioning

confidence: 99%

“…To the best to our knowledge, a few research papers have investigated the modelling techniques of Gemini surfactants based on relevant descriptors [3,13,[14][15][16][17][18][19][20]28,44]. The novelty of this work is the application of SVR-DA algorithm to model the CMC of diverse Gemini surfactants which has not been evaluated for CMC estimation yet and compare its performance with ANN, OLS, PLS and KNN model.…”

Section: Introductionmentioning

confidence: 99%

CMC of diverse Gemini surfactants modelling using a hybrid approach combining SVR-DA

Laidi

Abdallah

Si‐Moussa

et al. 2021

CI&CEQ

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As quantitative structure-property relationship (QSPR) technique provides a suitable tool to predict the critical micelle concentration (CMC) of Gemini surfactants from their structure descriptors. In this study, a comparative work was conducted to model the CMC property of 211 diverse Gemini surfactants based on their structural characteristics using linear and non-linear quantitative structure-property relationship models. Least squares model (OLS) and partial least squares (PLS) against k-nearest neighbours regression model (KNN), artificial neural network (ANN) and support vector regression (SVR) have been developed to model the CMC. Molecular descriptors were calculated and screened to remove unsuitable descriptors and improve the learning. Results indicate that the improved performance of support vector regression when the hyper-parameters are optimized using Dragonfly algorithm (SVR-DA) was highly capable of predicting the pCMC (-logCMC) values with an average absolute relative deviation (AARD) of 0.666 and coefficient of determination (R?) of 0.9971 for the global dataset.

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“…A surfactant with longer hydrocarbon chain shows greater solubilization as compared to one having smaller hydrocarbon chain. Mixed micellar systems have also been used for the significant enhancement of water solubility of poorly soluble organic contaminants like PAH (Fatma et al, 2015(Fatma et al, , 2018Kamil and Siddiqui, 2013;Panda et al, 2016;Wei et al, 2013;Yadav et al, 2015Yadav et al, , 2017.…”

Section: Introductionmentioning

confidence: 99%

Influence of Nature of Spacer and Hydrocarbon Chain Length on Micellar Encapsulation of Polynuclear Aromatic Hydrocarbons by Carbohydrate Derived Non‐Ionic Gemini Surfactants in Aqueous Ethanol Medium

Saroj

Sharma²

2020

J Surfact & Detergents

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Gemini surfactants with rigid aromatic spacer-CH 2-ArCH 2-: 6,6 0-(N,N 0-di(alkyl)-1,4-phenylenedimethyl amino)bis(6-deoxy-1,2-O-isopropylidene-α-D-glucofuranose) and Gemini surfactants with flexible aliphatic spacer-(CH 2) 6-: 6,6 0-(N,N 0-di(2-hydroxyalkyl)-1,6-hexanediamino)bis(6-deoxy-1,2-O-isopropylidene-α-D-glucofuranose) have been synthesized, and their micellar properties for encapsulation of polynuclear aromatic hydrocarbons (PAH) viz. fluorene, anthracene, triptycene, and pyrene in aqueous ethanol medium have been studied by means of electronic spectroscopy. The micellar study reveals that nature of spacer and length of hydrocarbon chain of the surfactant has profound effect on micellar encapsulation of PAH. The surfactants with rigid aromatic spacer show greater encapsulation as compared to surfactants with flexible aliphatic spacer. Moreover, the more hydrophobic surfactant, i.e. the surfactant with a longer hydrocarbon chain, shows greater encapsulation toward PAH which are encapsulated in the order of their smaller size.

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Solubilization potentials of single and mixed oppositely charged gemini surfactants: A case of polycyclic aromatic hydrocarbons

Cited by 29 publications

References 38 publications

Impacts of Low Atmospheric Pressure on Properties of Cement Concrete in Plateau Areas: A Literature Review

Impacts of Low Atmospheric Pressure on Properties of Cement Concrete in Plateau Areas: A Literature Review

CMC of diverse Gemini surfactants modelling using a hybrid approach combining SVR-DA

Influence of Nature of Spacer and Hydrocarbon Chain Length on Micellar Encapsulation of Polynuclear Aromatic Hydrocarbons by Carbohydrate Derived Non‐Ionic Gemini Surfactants in Aqueous Ethanol Medium

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