Surfactant precipitation and redissolution in brine

Chou, S.I.; Bae, Jae-Heum

doi:10.1016/0021-9797(83)90021-8

Cited by 43 publications

(24 citation statements)

References 25 publications

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“…Stellner and Scamehorn (172) use such an approach to understand the increase in salinity tolerance of an anionic surfactant by the addition of nonionic. Because of its practical importance, the precipitation boundaries of Ca +2 ion with anionic surfactants have been frequently studied (173)(174). The effect of alkyl ethoxylate nonionic surfactants in preventing the precipitation of calcium dodeyl sulfate has been modeled successfully using the regular solution approach to calculate monomer concentrations (175).…”

Section: Solid-liquid Phase Equilibria In Mixed Surfactantmentioning

confidence: 99%

Mixed Surfactant Systems

Holland¹,

Rubingh

1992

Mixed Surfactant Systems

251

329

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The properties and behavior of mixed surfactant systems are discussed in the context of experimental techniques and modeling. The overview begins with a general description of mixed surfactant solutions, followed by a more detailed examination of mixed micelles, surfactant mixtures at interfaces, and the phase behavior of mixed systems. Topics include experimental measurements, approaches to modeling, nonideality, unusual surfactant types, micellar demixing, adsorption at various interfaces, chemical reactions in micelles, precipitation, cloud point phenomena and perspectives on the direction of future research on mixed surfactant systems.Mixed surfactant systems are encountered in nearly all practical applications of surfactants. These mixtures arise from several sources. First is the natural polydispersity of commercial surfactants which results from impurities in starting materials and variability in reaction products during their manufacture. These are less expensive to produce than isomerically pure surfactants and often provide better performance. Second is the deliberate formulation of mixtures of different surfactant types to exploit synergistic behavior in mixed systems or to provide qualitatively different types of performance in a single formulation (e.g. cleaning plus fabric softening). Finally, practical formulations often require the addition of surfactant additives to help control the physical properties of the product or improve its stability.

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Section: Solid-liquid Phase Equilibria In Mixed Surfactantmentioning

confidence: 99%

Mixed Surfactant Systems

Holland¹,

Rubingh

1992

Mixed Surfactant Systems

251

329

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“…To achieve greater removal of SDS, DM‐SDS lo , matrices were agitated throughout the procedure and treated with an additional step to precipitate SDS, which consisted of a 2 hr 0.5 mM CaCl 2 wash. The strong interaction between the anionic detergent and Ca 2+ causes SDS to precipitate out of solution (Chou & Bae, ; Iyota, Tomimitsu, & Aratono, ). Matrices created by either method had less than 50 ng DNA per mg dry weight of tissue and were negative for DAPI staining, indicating efficient DNA removal and consistent with standards previously proposed by Crapo et al ().…”

Section: Resultsmentioning

confidence: 99%

“…The strong interaction between the anionic detergent and Ca 2+ causes SDS to precipitate out of solution (Chou & Bae, 1983 3.3 | Cell response to residual SDS in vitro…”

Section: Removal Of Dna and Sdsmentioning

confidence: 99%

Residual sodium dodecyl sulfate in decellularized muscle matrices leads to fibroblast activation in vitro and foreign body response in vivo

Friedrich

Lanier

Niknam-Bienia

et al. 2017

J Tissue Eng Regen Med

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Detergents such as sodium dodecyl sulfate (SDS) are commonly used to extract cells from tissues in a process called "decellularization". Residual SDS is difficult to completely remove and may lead to an undesirable host response towards an implanted biomaterial. In this study, we developed a modification for SDS cell extraction from muscle equally efficient to previous methods but leading to significantly less residual SDS remnants in the matrices. Muscle-derived matrices were prepared via 2 SDS-based decellularization methods, which led to removal of either 81.4% or 98.4% of the SDS. In vitro, matrices were seeded with thp1 macrophages and primary human foreskin fibroblasts. By Day 2, both matrices demonstrated similar macrophage polarization; however, fibroblasts cultured on matrices with greater residual SDS expressed higher levels of mRNA associated with fibroblast activation: α-smooth muscle actin and connective tissue growth factor. In vivo, Collagen I gels spiked with increasing concentrations of SDS displayed a corresponding decrease in cell infiltration when implanted subcutaneously in rats after 4 days. Finally, as a model for muscle regeneration, matrices produced by each method were implanted in rat latissimus dorsi defects. At POD 30 greater levels of IL-1β mRNA were present in defects treated with matrices containing higher levels of SDS, indicating a more severe inflammatory response. Although matrices containing higher levels of residual SDS became encapsulated by POD 30 and showed evidence of a foreign body response, matrices with the lower levels of SDS integrated into the defect area with lower levels of inflammatory and fibrosis-related gene expression.

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“…Several investigations have dealt with the binding of Ca ++ to surfactant micelles [8][9][10]. A convenient method for such studies is the use of a metallochromic indicator such as murexide, which enables the amounts of free and bound calcium to be calculated *) Dedicated to Prof. Dr. Wolfgang H.ilger on the occasion of his 60th birthday.…”

Section: Introductionmentioning

confidence: 99%

Binding of calcium ions to micelles ? a metallochromic indicator study

Miller

1989

Colloid & Polymer Sci

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Abstract:The complex formation of Ca ++ with murexide was investigated spectrophotometrically. In the presence of surfactants, such measurements can be used to determine the extent of binding of Ca ++ to the micelles. Experiments with secondary alkane sulphonate showed that there is competition between Na § and Ca + § for the micelles. Below the critical micelle concentration, no binding was observed.

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Surfactant precipitation and redissolution in brine

Cited by 43 publications

References 25 publications

Mixed Surfactant Systems

Mixed Surfactant Systems

Residual sodium dodecyl sulfate in decellularized muscle matrices leads to fibroblast activation in vitro and foreign body response in vivo

Binding of calcium ions to micelles ? a metallochromic indicator study

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