Phase equilibrium and protein partitioning in aqueous micellar two-phase system composed of surfactant and polymer

Liu, Yang; Wu, Zhongyang; Dai, Jinhong

doi:10.1016/j.fluid.2012.02.002

Cited by 35 publications

(21 citation statements)

References 29 publications

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“…Dextran sulfate (Dx-S) is an anionic polymer that, based on excluded-volume interactions, should partition preferentially to the micelle-poor phase of nonionic ATPMS. Depending on the concentration, it will actually form an aqueous two-phase polymer/micelle system [17]. Therefore, we believe that Dx-S could promote an electrostatic repulsion of the negatively charged CA during the extraction process.…”

Section: Introductionmentioning

confidence: 98%

Dextran sulfate/Triton X two-phase micellar systems as an alternative first purification step for clavulanic acid

Silva

Santos-Ebinuma

Lopes

et al. 2015

Fluid Phase Equilibria

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Section: Introductionmentioning

confidence: 98%

Dextran sulfate/Triton X two-phase micellar systems as an alternative first purification step for clavulanic acid

Silva

Santos-Ebinuma

Lopes

et al. 2015

Fluid Phase Equilibria

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“…Currently, efforts to develop the surfactant-based multicomponent systems which translate the assembly feature of functional protein solutions are underway. Interestingly, these systems show the far-from equilibrium behavior which very much resembles those in living organisms − and the aqueous two-phase behavior upon changing the mole ratio between the components. Both of them also show a clear sign of reaction-diffusion process upon exposing them to concentration- or pH-perturbation.…”

Section: Discussionmentioning

confidence: 95%

Assembly of Lyotropic Liquid Crystals with Solid Crystal’s Structural Order Translated from the Lipid Rafts in Cell Membranes

Lee

2017

J. Am. Chem. Soc.

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Self-assembly offers a powerful way to control the complexity and hierarchy of nanoscale materials, and promises to create a diverse range of emergent properties. Successful syntheses that allow a delicate structural design of building units play an important role. However, as can be learned from many cellular processes and functions, coself-assembly using logically chosen additives should be equally effective in designing self-assembly. Herein I show that, translated from the dynamic nanoscale assemblies in cell membranes known as lipid rafts, coself-assembly of 1-decanol into cetyltrimethylammonium chloride micelles for the assembly of lyotropic liquid crystals generates new structural complexity and hierarchy, and a surprising property that is emerging from it. Designing the intermolecular forces in the way that cholesterol interacts with sphingolipids promotes the synergistic balance between the flexibility and rigidity, and the unique molecular recognition for silicic acid, followed by the micelle coalescence. This very much resembles the assembly process of the lipid rafts in cell membranes and triggers orders of magnitude of sharp increases in X-ray diffraction intensity. The analysis of the diffraction patterns shows that the structural order of these liquid crystals matches that of solid crystals, often of single crystals. Furthermore, the assembly of the liquid crystals promotes a substantial increase in the condensation rate of silicic acids by guiding them to form a silicate trimer along the surface of micelles. This very much resembles the role of the lipid rafts that sharply increases the reaction rate of biomolecules by guiding them to form discrete species along the surface of membranes. This finding demonstrates that it is possible to translate the key features of cellular processes and functions into artificial self-assembling systems of our choice using the building units that are readily available, thus creating novel soft materials.

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“…In Fig. 2b, the variation of surfactant concentration in the oil phase shows that partition equilibrium (Liu et al, 2012) of the KPS concentration in the oil phase may appear after adding polymer. After the concentration reaches the maximum, the KPS concentration in the oil phase may not increase with the added KPS mass fraction increasing, after emulsification, the KPS concentration in oil was significantly lower than that without polymer, indicating that the Under the hydrophobic interaction, some of the sulfonate molecules are adsorbed onto the HPAM macromolecular chain and form micelles, which suppress the partition of surfactant to the oil-water interface (Wang et al, 2009).…”

Section: Effect Of Polymer Concentration On Kps Distribution During Ementioning

confidence: 96%

Effect of Emulsification on Surfactant Partitioning in Surfactant‐Polymer Flooding

Liu

Sun

et al. 2019

J Surfact & Detergents

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A laboratory surfactant‐polymer flooding experiment was performed to study the effect of emulsification on surfactant partitioning. The partition coefficient of petroleum sulfonates (KPS) after emulsification was significantly higher than that under static conditions. The partition coefficient of KPS gradually decreases with the increase of polymer concentration from 1000–3000 mg L−1, indicating that the increase of polymer concentration could protect KPS from the partition loss of emulsification. The lower the oil–water ratio, the higher the partition coefficient. The partition coefficient of KPS of resin and asphaltene was higher than that of crude oil. Alkanes, aromatics, and other polar components in crude oil have a significant influence on the partition of KPS.

show abstract

Phase equilibrium and protein partitioning in aqueous micellar two-phase system composed of surfactant and polymer

Cited by 35 publications

References 29 publications

Dextran sulfate/Triton X two-phase micellar systems as an alternative first purification step for clavulanic acid

Dextran sulfate/Triton X two-phase micellar systems as an alternative first purification step for clavulanic acid

Assembly of Lyotropic Liquid Crystals with Solid Crystal’s Structural Order Translated from the Lipid Rafts in Cell Membranes

Effect of Emulsification on Surfactant Partitioning in Surfactant‐Polymer Flooding

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