Facilely control the SDS ability to reduce the interfacial tension via the host-guest recognition

Jia, Han; Leng, Xu; Zhang, Daqian; Lian, Peng; Liang, Yipu; Wu, Hongyan; Huang, P. M.; Liu, Jingping; Zhou, Hongtao

doi:10.1016/j.molliq.2018.01.181

Cited by 14 publications

(8 citation statements)

References 48 publications

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“…This observation is in contrast to conventional surfactants, making the gemini IL a distinctive alternative in CEOR dealing with harsh salinity conditions . It is also worth noting that salts usually have no effect on the nonionic surfactants; hence, for the ionic surfactants, an optimum point is usually relevant at a specified salt concentration after which IFT remains constant or presents an ascending variation. , In the presence of salt ions, the repulsion between molecules of the IL is weakened. This repulsion, in turn, compresses the two parallel charge layers surrounding the gemini IL head groups, giving a closer arrangement and easier accumulation of the IL molecules .…”

Section: Resultsmentioning

confidence: 99%

Systematic Investigation of a Surfactant Type Nano Gemini Ionic Liquid and Simultaneous Abnormal Salt Effects on Crude Oil/Water Interfacial Tension

Saien

Kharazi

Yarie

et al. 2019

Ind. Eng. Chem. Res.

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Gemini ionic liquids (ILs) are usually known to have significant surfactant behavior. Nanomaterials, on the other hand, are capable of improving interface properties. The current study explores the use of a novel nano gemini imidazolium IL with a molecular structure of a four methylene group spacer for reducing crude oil/water interfacial tension (IFT). The gemini IL was prepared purely by a two-step synthesis method and characterized in different ways. Results revealed that IFT was drastically decreased to 97.8% in the presence of the IL and more decrease was achieved with temperature and pH variations. The high performance of the IL can be attributed to the strong IL amphiphilic nature. The salt effects in the presence of the IL were evaluated with NaCl, MgCl2, and their mixture. Results revealed more IFT reduction under salinity conditions because of a remarkable found synergism effect, unlike conventional surfactants. The findings encourage the use of seawater IL solutions in chemical enhanced oil recovery. The obtained salt-free IFT data were precisely reproduced with the well-known Frumkin adsorption isotherm, and the corresponding thermodynamic parameters were obtained at different temperatures. From thermodynamic results, a spontaneous IL adsorption was deduced.

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Section: Resultsmentioning

confidence: 99%

Systematic Investigation of a Surfactant Type Nano Gemini Ionic Liquid and Simultaneous Abnormal Salt Effects on Crude Oil/Water Interfacial Tension

Saien

Kharazi

Yarie

et al. 2019

Ind. Eng. Chem. Res.

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“…According to the literature [24,25,[29][30][31], the CDs alone are not surface active at air/water interfaces, but inclusion complexes between CDs and linear apolar molecules did present surface-activity, decreasing the air/water surface tension. Bojinova et al [30] and Machut et al [31] observed decreases in surface tension from 72 mN/m in pure water to values between 20 and 40 mN/m in the presence of CD complexes with 1-dodecanol and long chain esters (isosorbide dioleate and sorbitan trioleate), respectively.…”

Section: Effect Of Cyclodextrins On the Wettability Of C 18 -Quartzmentioning

confidence: 97%

Evaluation of Cyclodextrins as Environmentally Friendly Wettability Modifiers for Enhanced Oil Recovery

Cruz

Sanches

Miranda

et al. 2018

Colloids and Interfaces

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In the present work, the use of Cyclodextrins (CDs) as wettability modifiers for enhanced oil recovery (EOR) was evaluated. Cyclodextrins (CDs) are cyclic oligosaccharides that form inclusion complexes with various organic molecules, including n-alkanes. Wettability was evaluated through the contact angle (θ) of an n-dodecane drop in contact with a quartz surface and immersed in a 0.6 M NaCl aqueous solution containing the CDs. The quartz surface was functionalized with octadecyltrichlorosilane (OTS), rendering the surface oil-wet (C 18 -quartz). Here, the n-dodecane, the saline solution and the C 18 -quartz represent the oil, the reservoir brine and an oil-wet rock surface, respectively. In the absence of CDs, the n-dodecane drops spread well over the C 18 -quartz, showing that the surface was oleophilic. In the presence of CDs, remarkable effects on the wettability were observed. The most dramatic effects were observed with α-cyclodextrin (α-CD), in which case the C 18 -quartz surface changed from oil-wet (θ = 162 • ) in the absence of CD to water-wet (θ = 33 • ) in the presence of 1.5% (w/v) α-CD. The effects of the CDs can be explained by the formation of surface-active inclusion complexes between the CDs and n-dodecane molecules. The CD inclusion complexes can be regarded as pseudo-surfactants, which are less harmful to the environment than the traditional surfactants employed by the petroleum industry.

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“…4 Because of the presence of the primary and secondary hydroxyl groups on the exterior of the cyclic structure, the exterior of a CD is hydrophilic, which allows hydrogen bonding cohesive interactions, whereas the central cavity presents a hydrophobic environment as a host that promotes the binding interaction with hydrocarbon segments of guests (surfactants, lipids, polymers, ionic liquids, alkanes, amino acids, and vitamins) to form inclusion complexes. 5,7 Thus, nonpolar molecules or compounds are capable of displacing bound water molecules in the cavity of CD to form inclusion complexes. 17 β-CD is ideal for complexation because of its ideal cavity size, efficient drug encapsulation and loading, availability, and relatively low cost.…”

Section: Introductionmentioning

confidence: 99%

“…The concept of utilizing nanostructured materials with cyclodextrin (CD) for drug encapsulation has emerged as a feasible approach to improve the encapsulation and delivery of active compounds in biomedical sciences. β-Cyclodextrin (β-CD) forms a host–guest inclusion complex, , mainly driven by hydrophobic or van der Waals and hydrogen bond interactions, , with many organic and amphiphilic compounds, like surfactants found in pharmaceutical, textile, cosmetic, food, and personal care systems . CDs are known to bind surfactant molecules below the surfactant cmc; however, interactions of CDs with surfactant micelles (above the cmc) are not well understood.…”

Section: Introductionmentioning

confidence: 99%

“…CDs are cyclic oligosaccharides composed of 6–8 α- d -glucopyranose units, linked by α-1,4-glucosidic linkages that form a ring and have the shape of truncated cone or torus. , They are crystalline, homogeneous, water-soluble, biocompatible, nonhygroscopic, and stable (chemically and physically) macromolecules produced by enzymatic degradation of starch . Because of the presence of the primary and secondary hydroxyl groups on the exterior of the cyclic structure, the exterior of a CD is hydrophilic, which allows hydrogen bonding cohesive interactions, whereas the central cavity presents a hydrophobic environment as a host that promotes the binding interaction with hydrocarbon segments of guests (surfactants, lipids, polymers, ionic liquids, alkanes, amino acids, and vitamins) to form inclusion complexes. , Thus, nonpolar molecules or compounds are capable of displacing bound water molecules in the cavity of CD to form inclusion complexes . β-CD is ideal for complexation because of its ideal cavity size, efficient drug encapsulation and loading, availability, and relatively low cost .…”

Section: Introductionmentioning

confidence: 99%

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β-Cyclodextrin-Functionalized Cellulose Nanocrystals and Their Interactions with Surfactants

et al. 2019

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β-cyclodextrin (β-CD) forms a host–guest inclusion complex with many organic and amphiphilic compounds found in pharmaceutical, textile, cosmetic, food, and personal care systems. Therefore, grafting of β-CD onto a cellulose nanocrystal (CNC) offers a possible strategy to use functionalized CNC to complex with surface-active molecules. We have successfully grafted β-CD onto CNCs in a stepwise manner using cyanuric chloride as the linker. The structure of β-CD-grafted CNC (CNC-CD) was characterized by UV–vis and Fourier-transform infrared spectroscopy, and the grafting ratio of β-CD was determined by the phenolphthalein inclusion protocol. Ionic surfactants induced the aggregation of CNC-CDs by forming inclusion complexes with β-CDs on the surface of CNC. The interactions of amphiphilic compounds with CNC-CD were examined by surface tensiometry, conductometric and potentiometric titration, and isothermal titration calorimetry. Mechanisms describing the complex formation between surfactants and CNC-CD were proposed, where an improved understanding of CD interactions with surfactants and lipids would enable better strategies for drug encapsulation and delivery with CDs.

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Facilely control the SDS ability to reduce the interfacial tension via the host-guest recognition

Cited by 14 publications

References 48 publications

Systematic Investigation of a Surfactant Type Nano Gemini Ionic Liquid and Simultaneous Abnormal Salt Effects on Crude Oil/Water Interfacial Tension

Systematic Investigation of a Surfactant Type Nano Gemini Ionic Liquid and Simultaneous Abnormal Salt Effects on Crude Oil/Water Interfacial Tension

Evaluation of Cyclodextrins as Environmentally Friendly Wettability Modifiers for Enhanced Oil Recovery

β-Cyclodextrin-Functionalized Cellulose Nanocrystals and Their Interactions with Surfactants

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