Synthesis, aggregation behavior and interfacial activity of branched alkylbenzenesulfonate gemini surfactants

Zhang, Qun; Tian, Mingzhen; Han, Yujie; Wu, Chunxian; Li, Zhibo; Wang, Yilin

doi:10.1016/j.jcis.2011.05.087

Cited by 32 publications

(18 citation statements)

References 49 publications

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“…In such systems, in-situ hydrophobicity occurs, that is, surfactant molecules with opposite charges are adsorbed to the surface of particles by electrostatic attraction, forming a monolayer, making the surface of particles hydrophobic, so that particles can be adsorbed to the water-air interface to stabilize bubbles. Oligomeric surfactants can be regarded as oligomers of traditional monomeric surfactant fragments, which are linked by spacer groups near their ionic groups [86,87,88,89,90,91,92]. Figure 8 [79] shows the chemical structures of the cationic oligomeric surfactants [79].…”

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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“…Preparation and Characterization of AGS Compared with the existing methods to prepare the sulfonate-based AGS (Du et al, 2006;Jia et al, 2009;Zhang et al, 2011;Zhu et al, 2012), AGS was prepared with a high yield of 93.6% by a simple, low-cost, and green method, which only produced small amounts of sodium sulfates as solid waste.…”

Section: Resultsmentioning

confidence: 99%

“…The currently developed surfactants for EOR are mainly of anionic surfactants, among which anionic Gemini surfactant (AGS) has been considered the most promising surfactant because of its excellent surface activities, such as low critical micelle concentration (CMC), low adsorption on surface of reservoir rock, wetting and emulsifying ability for the crude oil, and excellent synergistic effect with other surfactants (Din et al, 2013;Gao and Sharma, 2013;Jiang et al, 2014;Lv et al, 2014;Salehi et al, 2010). However the complicated synthesis technology; high preparing cost (Du et al, 2006;Jia et al, 2009;Zhang et al, 2011;Zhu et al, 2012); and narrow applied range, such as the ranges of temperature (Zhou et al, 2015), salinity, and ion concentration of calcium and magnesium in the reservoir, have made the existing AGS hard to be widely applied in practical EOR. The Bamianhe Oil Supporting information Additional supporting information may be found online in the Supporting Information section at the end of the article.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of an Anionic Gemini Surfactant for Enhanced Oil Recovery in a Hypersaline Reservoir

Chen

Liu

et al. 2019

J Surfact & Detergents

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A new type of anionic Gemini surfactant (AGS) was designed and prepared by a simple, low–cost, and green method, and its properties were characterized. The results showed that the values of parameters such as critical micelle concentration (CMC) value, Γmax, Amin, and pC20 of AGS were 0.10 mmol L−1, 1.62 mmol m−2, 1.02 nm2, and 4.60, respectively, indicating that AGS is highly surface active. AGS has a very good synergistic effect with lauryl diethanol amide (6501), and the mixture surfactant 6501DA (composed of AGS and 6501 with a mass ratio of 1:2.5) has good wetting and emulsifying ability of the crude oil and good resistance to calcium and magnesium ions. In the temperature range from 50 to 70 °C, salinity of 20,000–50,000 mg L−1 of the simulated formation water, and dosage of 6501DA from 500 to 3000 mg L−1, all the interfacial tension (IFT) values between the 6501DA solution and Bamianhe crude oil were lower than 10−2 mN m−1, and all the adsorption amounts of oil sand to 6501DA in solution were less than 2 mg g−1, indicating that AGS has potential for application in EOR in a hypersaline reservoir.

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“…The values of D and P m for all surfactant systems studied herein rise continuously with the incremental concentrations of single surfactant systems and the addition of Brij35. Obviously, the size of micelles and the aggregation number enhance with the increasing concentration of surfactant and the Brij35/CG molar ratio α, namely, the number of surfactant molecules or in the micellar phase increase, and more binding sites between phenol and surfactant micelles enlarge [3,[32][33][34][35][36], which could be observed from higher D in Fig. 2.…”

Section: Calculated Parametersmentioning

confidence: 99%

“…2. It could be explained as followed: when the feed surfactant concentration increased, more micelles formed in the solution [32][33][34][35][36], which means the number of surfactant molecules entered the micellar phase (higher S m ), thus the free phenol in the water phase accordingly reduced. As for the mixed surfactant system, the right figure showed that S m values are approximate to each other and enhance slowly when the Brij35/CG molar ratios α varies from 0 to 1.2.…”

Section: Calculated Parametersmentioning

confidence: 99%

Study on solubilization capability of various Gemini micelles in micellar-enhanced ultrafiltration of phenol-contaminated waters

Zhang

Huang

Wei

2015

Desalination and Water Treatment

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A systematic study has been conducted to have an insight into the separation efficiency of phenol with the help of Gemini surfactants and conventional nonionic surfactant in their single and mixed systems using micellar-enhanced ultrafiltration (MEUF). A flat sheet membrane with a total effective area of 0.08 m 2 and a molecular weight cut-off of 10 kDa, was selected in this investigate. The effects of feed component (surfactant concentration for single surfactant system and mixed ratio for mixed surfactant system) on solubilization and filtration efficiency were researched. Some related parameters were used to estimate the performance of various surfactant systems, such as distribution coefficient (D), the phenol concentration in micellar phase (P m ), the surfactant concentration in micellar phase (S m ), the micelle loading (L m ), and the equilibrium distribution constant (K). With the increase of feed surfactant concentration or the addition of nonionic surfactant, the degree of solubilization of phenol enhances, leading to the decrease of permeate concentration and the augment of retentate concentration. Consequently, D, P m , and S m increases. The addition of nonionic surfactant has positive effects to recounterbalance the interior structure and improve the micellar solubilization power for phenol. Both the single and mixed C 12-2-16 systems have higher D, P m , and S m values than these of C 12-2-12 , due to the longer length alkyl chain and more optimized structure. L m and K are the significant indicators for evaluating the effectiveness of dissolving phenol. Irreversible fouling was almost eliminated with a series of cleaning solution in a short time. There results from the laboratory-scale experiments could be very useful in selection of the suitable surfactant systems for raising efficiency and could serve as valuable guide for MEUF in industrial application.

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Synthesis, aggregation behavior and interfacial activity of branched alkylbenzenesulfonate gemini surfactants

Cited by 32 publications

References 49 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

Preparation and Characterization of an Anionic Gemini Surfactant for Enhanced Oil Recovery in a Hypersaline Reservoir

Study on solubilization capability of various Gemini micelles in micellar-enhanced ultrafiltration of phenol-contaminated waters

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