Нефтехимия, Journal Year: 2023, Volume and Issue: 63(4), P. 449 - 470
Published: Dec. 15, 2023
Language: Английский
Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(2), P. 112080 - 112080
Published: Feb. 9, 2024
Language: Английский
Citations
2
Molecules, Journal Year: 2024, Volume and Issue: 29(11), P. 2570 - 2570
Published: May 30, 2024
An oleyl alcohol-based extended surfactant, sodium polyethylene oxide-polypropylene oxide sulfate (OE
Language: Английский
Citations
2
Langmuir, Journal Year: 2023, Volume and Issue: 39(37), P. 13008 - 13018
Published: Sept. 7, 2023
In this paper, the interfacial properties of extended surfactants with different oxypropylene (PO) groups were comprehensively investigated by using dilational rheology. The differences in molecular orientation, spatial configuration, and relaxation process compared at gas-water interface oil-water interface. influences PO on viscoelasticity analyzed, providing important theoretical support for wide application surfactants. Experimental results show that lower number does not cause their presence states interface; however, once it increases, longer segment will spiral up direction perpendicular to interface, forming a configuration like thin cylinder. Compared air, group has better solubility oil phase. chain can still maintain helical extension from beginning end as result. However, upper layer cylinder collapse certain extent surface. Moreover, orientation hydrophobic side dynamic "tilting upright" increase adsorption amount or response dilation compression. insertion molecules little effect modulus, film strength is generally relatively low. That say, emulsifying solubilizing ability PO-containing may be more attributed matching steric packing action bulk phase than higher strength.
Language: Английский
Citations
5
Geoenergy Science and Engineering, Journal Year: 2022, Volume and Issue: 222, P. 211395 - 211395
Published: Dec. 29, 2022
Language: Английский
Citations
7
Molecules, Journal Year: 2023, Volume and Issue: 28(14), P. 5436 - 5436
Published: July 16, 2023
Interfacial dilational rheology is one of the important means to explore interfacial properties adsorption films. In this paper, rheological mixed system sulfobetaine ASB with a linear alkyl group and two anionic surfactants, petroleum sulfonate (PS) polyoxyethylene carboxylate (AEC), were investigated by rheology. The effect introduction polymer hydrophobically modified polyacrylamide (HMPAM) on was analyzed. experiment, surfactant solution used as external phase n-decane internal phase. A periodic sinusoidal disturbance 0.1 Hz applied droplets, changes parameters such droplet tension area monitored in real time help computer. results show that betaine molecule responds dilation compression interface through change ion head orientation, while feedback behavior PS AEC molecules embedded oxygen vinyl groups diffusion exchange between bulk Therefore, film formed alone higher, relatively lower. After adding kinds surfactants system, ionic or will be attached positive center hydrophilic electrostatic attraction no longer adsorb desorb deformation. compound are still dominated betaine, higher modulus lower angle. When small amount HMPAM added, content hydrophobic monomer AMPS low, intermolecular interaction at enhanced, slow relaxation process intensified, strength increased. As further increases, blocks form aggregates similar micelles oil-water interface, which regulate affecting interface. long same, same. Based colloid science background enhanced oil recovery, study provides reference for field application chemical flooding formulations.
Language: Английский
Citations
4
Journal of Surfactants and Detergents, Journal Year: 2024, Volume and Issue: 27(6), P. 937 - 948
Published: April 24, 2024
Abstract Enhanced oil recovery (EOR) by surfactant flooding has been attractive. Among the surfactants developed alcohol polyoxypropylene (PO)‐polyoxyethylene (EO) ether sulfates (APES), also named extended surfactants, have proved efficient. However, arrangement of PO and EO chains as well hydrocarbon structure in molecules may significantly affect their performances. In this paper three APES, C 18−16 25 10 SO 4 Na (I), (PO/EO) 25+10 (II), 16 GA(PO/EO) (III) were prepared investigated, which APES (I) (II) designed to same numbers but block randomly copolymerized respectively with linear fatty alcohols starting agent, whereas was derived from double chain Guerbet (C GA) copolymerized. The results show that gives much better brine solubility counterion tolerance than (III). Although all synthesized are highly surface‐active can reduce Daqing crude oil/simulated interfacial tension (IFT) ultralow mixing more hydrophobic presence or absence alkali, lowest IFT due chains. addition, it is found for gelation occurs neutralization process corresponding nonionic intermediate viscous, two intermediates liquid‐like low viscosity, be feasible apply 3 /air falling film sulfation. This study provided useful information embedded moiety designing EOR.
Language: Английский
Citations
1
The Journal of Physical Chemistry B, Journal Year: 2024, Volume and Issue: 128(27), P. 6648 - 6653
Published: June 27, 2024
Ether-linked surfactants are widely used in formulations such as liquid soaps, but despite their ubiquity, it is unclear how
Language: Английский
Citations
1
Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: unknown, P. 126182 - 126182
Published: Oct. 1, 2024
Language: Английский
Citations
1
Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 648, P. 809 - 819
Published: June 10, 2023
To challenge the classical concept of step-like micellization ionic surfactants with singular critical micelle concentration, novel amphiphilic compounds bulky dianionic head and alkoxy tail connected via short linker, which can complex sodium cations, were synthesized in form disodium salts.The by opening a dioxanate ring attached to closo-dodecaborate activated alcohol, allows for attachment alkyloxy tails desired length boron cluster dianion. The synthesis high cationic purity (sodium salt) is described. Self-assembly surfactant compound at air/water interface bulk water was studied tensiometry, light small angle X-ray scattering, electron microscopy, NMR spectroscopy, MD simulations isothermal titration calorimetry, ITC. peculiarities structure formation revealed thermodynamic modelling process.In an atypical process, self-assemble relatively micelles, where aggregation number decreasing concentration. extensive counterion binding key characteristic micelles. analysis strongly indicates compensation between degree bound ions number. For first time, three-step model used estimate parameters associated process. Diverse micelles differing size (co-)exist solution over broad concentration temperature range. Thus, found inappropriate these types
Language: Английский
Citations
3
Molecules, Journal Year: 2023, Volume and Issue: 28(11), P. 4318 - 4318
Published: May 24, 2023
In order to explore the interface adsorption mechanism of hydroxyl-substituted alkylbenzene sulfonates, interfacial tension relaxation method was used investigate dilational rheology properties sodium 2-hydroxy-3-octyl-5-octylbenzene sulfonate (C8C8OHphSO3Na) and 2-hydroxy-3-octyl-5-decylbenzene (C8C10OHphSO3Na) at gas-liquid oil-water interface. The effect length hydroxyl para-alkyl chain on behavior surfactant molecules investigated, main controlling factors film under different conditions were obtained. experimental results show that for interface, long-chain alkyl groups adjacent group in tend extend along showing strong intermolecular interaction, which is reason why viscoelasticity surface higher than ordinary sulfonates. has little viscoelastic modulus. With increase concentration, also began into air, changed from rearrangement diffusion exchange. For presence oil will hinder tiling hydroxyl-protic alkyl, C8C8 C8C10 be greatly reduced relative surface. factor exchange between bulk phase beginning.
Language: Английский
Citations
1