Surface and interfacial tension of nonylphenol polyethylene oxides sulfonate

Liu, Xiaochen; Zhao, Yongxiang; Li, Qiuxiao; Jiao, Tiliu; Niu, Jinping

doi:10.1016/j.molliq.2016.01.009

Cited by 28 publications

(3 citation statements)

References 29 publications

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“…The surface tension (γ) of the surfactants appears to have a minimum value near the concentration of CMC; this is due to the existence of other activities in the solution . When the concentration of the major components continues to increase, the surface tension of the solution will decrease, and the γ min can be reached.…”

Section: Resultsmentioning

confidence: 99%

Enhanced oil recovery from high‐salinity reservoirs by cationic gemini surfactants

Yuan

Liu

Gao

et al. 2017

J of Applied Polymer Sci

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In order to enhance oil recovery from high-salinity reservoirs, a series of cationic gemini surfactants with different hydrophobic tails were synthesized. The surfactants were characterized by elemental analysis, infrared spectroscopy, mass spectrometry, and 1 H-NMR. According to the requirements of surfactants used in enhanced oil recovery technology, physicochemical properties including surface tension, critical micelle concentration (CMC), contact angle, oil/water interfacial tension, and compatibility with formation water were fully studied. All cationic gemini surfactants have significant impact on the wettability of the oil-wet surface, and the contact angle decreased remarkably from 988 to 338 after adding the gemini surfactant BA-14. Under the condition of solution salinity of 65,430 mg/L, the cationic gemini surfactant BA-14 reduces the interfacial tension to 10 23 mN/m. Other related tests, including salt tolerance, adsorption, and flooding experiments, have been done. The concentration of 0.1% BA-14 remains transparent with 120 g/L salinity at 50 8C. The adsorption capacity of BA-14 is 6.3-11.5 mg/g. The gemini surfactant BA-14 can improve the oil displacement efficiency by 11.09%.

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Section: Resultsmentioning

confidence: 99%

Enhanced oil recovery from high‐salinity reservoirs by cationic gemini surfactants

Yuan

Liu

Gao

et al. 2017

J of Applied Polymer Sci

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show abstract

“…According to the Ward and Tordai model (the diffusion controlled adsorption model), if the adsorption is diffusion‐controlled, the plots of γ ( t ) versus t 1/2 (short‐time) and γ ( t ) versus t −1/2 (long‐time) should be linear (Ju, Jiang, Geng, Wang, & Zhang, ; Liu, Zhao, Li, Jiao, & Niu, ). Both plots of γ ( t ) versus t 1/2 (short‐time) and γ ( t ) versus t −1/2 (long‐time) using the data shown in Fig.…”

Section: Interfacial Propertiesmentioning

confidence: 99%

Preparation of Environmentally Friendly Amino Acid‐Based Anionic Surfactants and Characterization of Their Interfacial Properties for Detergent Products Formulation

Yea

Lee

et al. 2018

J Surfact & Detergents

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In this study, 2 types of amino acid‐based biosurfactants such as potassium cocoyl glycinate (CGK) and sodium cocoyl glycinate (CGN) were synthesized from coconut oil. Their chemical structures were identified using FT‐IR, 1H NMR, and 13C NMR spectroscopies. Characterization of their interfacial properties has shown that both CGK and CGN surfactants are surface‐active and effective in reducing interfacial free energy. Washing test results indicated relatively good detergency compared with surfactants commonly employed in detergent applications. From environmental compatibility tests, both CGK and CGN are found to be readily biodegradable, nontoxic, nonirritating, and very mild. In particular, the CGK surfactant was found to be more efficient in reducing interfacial free energy since a larger number of CGK molecules are preferentially adsorbed at the air–water interface due to higher hydrophobicity and larger mobility of CGK than CGN, indicating possible uses in detergent applications.

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“…Surface tensiometry has mainly been used to study airwater interfaces of molecules that have PEG segments as part of their structures [28][29][30][31] or to characterize the interactions between PEG and low molecular weight surfactants [32]. Pure PEG is rarely studied in the literature, such as the work by Zhao et al, reporting that surface tension decreased, as PEG 600 concentration was increased in water solutions, reinforcing that even pure PEG is highly surface active [34].…”

Section: Introductionmentioning

confidence: 99%

Coil Interpenetration, Segment Aggregation and Adsorption of PEG at Water/Air Interface

Rego

Melo

Neto

et al. 2017

J Surfact & Detergents

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Poly(ethylene glycol) (PEG), both as an oligomer and as a high molecular weight polymer, has been used as a surfactant active component in many applications, in its pure and unmodified structure, or as a block segment within more complex structures. Apart from assuming helical or coil conformations it may also undergo aggregation, depending on the solvent. In this work, we characterized the aggregation of PEG in water using surface tensiometry and turbidimetry. Aggregation was characterized by a non‐persistent surface tension plateau at higher PEG contents and confirmed by turbidimetry, which was correlated to the derivative of osmotic pressure in relation to concentration. One can divide a surface tension‐concentration curve into two regions, delimited by a characteristic concentration: one following a Langmuir adsorption isotherm (starting from a plateau equal to pure water surface tension) ending in a second plateau, and a second one (beginning at this plateau) following a Freundlich isotherm. The calculated surface excess for PEG segment adsorption was consistent with segment aggregation, indicating more two characteristic concentrations correlated to this occurrence. A total of three characteristic mer concentrations were found (6.2 × 10−7, 6 × 10−6, and 2 × 10−4mol L−1) and related to PEG segment aggregation states.

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Surface and interfacial tension of nonylphenol polyethylene oxides sulfonate

Cited by 28 publications

References 29 publications

Enhanced oil recovery from high‐salinity reservoirs by cationic gemini surfactants

Enhanced oil recovery from high‐salinity reservoirs by cationic gemini surfactants

Preparation of Environmentally Friendly Amino Acid‐Based Anionic Surfactants and Characterization of Their Interfacial Properties for Detergent Products Formulation

Coil Interpenetration, Segment Aggregation and Adsorption of PEG at Water/Air Interface

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