Alkyl polyglucosides

Balzer, D.

doi:10.1007/978-94-009-1557-2_7

Cited by 26 publications

(27 citation statements)

References 44 publications

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“…Alkyl polyglycosides (APG), a class of nonionic surfactants from renewable raw materials [1], have generated intense scientific and industrial interest due to their good dermatological compatibility and biodegradability [2,3]. Since APG were first synthesized and identified by Emil Fischer more than 100 years ago [4], an increasing number of studies have explored their synthesis [5,6], physicochemical properties [7,8], phase behavior [9][10][11] and microemulsion formation [12,13].…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Properties and Phase Behavior of Didecyldimethylammonium Chloride/Alkyl Polyglycoside Surfactant Mixtures

Han

Yang

Liu³

et al. 2015

J Surfact & Detergents

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Mixed surfactant systems, used in many formulations, have aroused great attention and interest from researchers and industry due to the possibility of synergism. Alkyl polyglycoside (APG) and didecyldimethylammonium chloride (DDAC) mixtures combine the excellent properties of pure surfactants and play an important role in the development of multi‐functional washing products. To study the synergism between APG and DDAC, the physicochemical properties of different mixed systems have been investigated. The critical micelle concentration (CMC) is about 180 mg·L−1 and the surface tension at the CMC is about 26.0 mN·m−1 at a mass fraction of 40 % DDAC (ωDDAC40 %). The values are significantly lower than pure surfactants. The foaming property shows the best performance at ωDDAC20 %. When the mass fraction of DDAC is 80 %, the mixture exhibits better wetting and emulsifying properties. Synergism was observed in surface tension, foaming and emulsifying properties, while the wetting ability and detergency exhibited no such effects. Phase behavior of the APG/DDAC/water ternary system has also been carried out by polarized optical microscope. The phase diagram is characterized by a micellar phase, a region where lamellar and micellar phases coexist and a lamellar phase.

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Section: Introductionmentioning

confidence: 99%

Physicochemical Properties and Phase Behavior of Didecyldimethylammonium Chloride/Alkyl Polyglycoside Surfactant Mixtures

Han

Yang

Liu³

et al. 2015

J Surfact & Detergents

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“…Cloud point temperature measurements for mixtures involving C 8 βG 1 were determined by visual inspection as described previously (Berger et al 2005b); the cloud point temperature is defined as the lowest temperature at which the solution spontaneously becomes turbid. This method has been successfully applied to determining the phase behavior of a wide variety of nonionic and zwitterionic surfactants (Weckstrom and Zulauf 1985; Blankschtein et al 1986; Balzer 1996; Liu et al 1996; Koehler and Kaler 1997). The resultant phase was determined from its ability to refract polarized light as well as by direct observation using an Olympus BHT microscope equipped with a temperature‐controlled flow cell.…”

Section: Methodsmentioning

confidence: 99%

Effects of additives on surfactant phase behavior relevant to bacteriorhodopsin crystallization

et al. 2006

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The interactions leading to crystallization of the integral membrane protein bacteriorhodopsin solubilized in n-octyl-b-D-glucoside were investigated. Osmotic second virial coefficients (B 22 ) were measured by selfinteraction chromatography using a wide range of additives and precipitants, including polyethylene glycol (PEG) and heptane-1,2,3-triol (HT). In all cases, attractive protein-detergent complex (PDC) interactions were observed near the surfactant cloud point temperature, and there is a correlation between the surfactant cloud point temperatures and PDC B 22 values. Light scattering, isothermal titration calorimetry, and tensiometry reveal that although the underlying reasons for the patterns of interaction may be different for various combinations of precipitants and additives, surfactant phase behavior plays an important role in promoting crystallization. In most cases, solution conditions that led to crystallization fell within a similar range of slightly negative B 22 values, suggesting that weakly attractive interactions are important as they are for soluble proteins. However, the sensitivity of the cloud point temperatures and resultant coexistence curves varied significantly as a function of precipitant type, which suggests that different types of forces are involved in driving phase separation depending on the precipitant used.Keywords: protein-detergent complex; membrane protein crystallization; cloud point temperature; osmotic second virial coefficient; self-interaction chromatography Membrane proteins represent one of the most significant challenges in modern structural biology. Genome sequence analysis indicates that 20%-40% of the open-reading frames of most organisms encode membrane proteins, yet they represent <1% of the available structures in the Protein Data Bank (PDB) (Wallin and von Heijne 1998;Wiener 2004). Although several structural genomics initiatives have recently begun to focus on membrane proteins-particularly G-protein coupled receptors (GPCRs)-difficulties in expression, purification, and crystallization remain (Loll 2003;Lundstrom 2004). In particular, identifying a suitable detergent to solubilize a given membrane protein, thereby forming a protein-detergent complex (PDC), and combining this with the appropriate additives and precipitants necessary for crystal formation while retaining PDC stability adds several variables that must be considered beyond those for soluble proteins (Rosenbusch 1990;Garavito et al. 1996). For example, including 24 common detergents and additives as variables in a typical crystallization screen using conventional 24-well formats can result in the need to sample >3000 potential solution conditions, which makes such efforts largely impractical for all but highly automated Abbreviations: C 8 bG 1 , n-octyl-b-D-glucoside; BR, bacteriorhodopsin; HT, heptane-1,2,3-triol; 1,6-HD, hexane-1,6-diol; 1,2-HD, hexane-1,2-diol; PEG, polyethylene glycol; SIC, self-interaction chromatography.Article published online ahead of print. Article and publi...

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“…Tiller, Yeh, and Leu [63] have reported that the film ruptures with increased stress on the film. The stress increased with the increased effect of interparticle forces, which occurred with a decrease in the particle size [82].…”

Section: Effect Of the Surfactant System And The Molecular Structurementioning

confidence: 96%

Inter-Correlation among the Hydrophilic–Lipophilic Balance, Surfactant System, Viscosity, Particle Size, and Stability of Candelilla Wax-Based Dispersions

2018

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Owing to a decrease in mineral oil resources, it is crucial to develop packaging materials based on renewable resources. Hence, a water vapor-barrier coating is developed as a natural wax-based dispersion. This dispersion should be stable over the storage time. In this study, the physical stability of a wax-based melt dispersion was analyzed (24 h and 21 days after production), and instability phenomena such as agglomeration, coalescence, and flotation were identified. Furthermore, the inter-correlations among the particle size, viscosity of the continuous phase, physical stability, surfactant chemistry, and hydrophilic–lipophilic balance value were characterized. Particle sizes were described by volume/surface mean d3,2, volume moment mean d4,3, and number mean d1,0 diameter, as well as the span of the volume and number distribution. Stability was characterized by the flotation rate, emulsion stability index, and Turbiscan stability index. Coalescence and agglomeration were not observed after the solidification of the wax particles. A significant correlation was observed for the emulsion stability index, with d3,2, and for flotation rate, with d1,0, d4,3, and viscosity as well, with d1,0, d3,2. Surfactants with hydrophilic–lipophilic balance values of 11–13.5 seem to be the most suitable for stabilizing candelilla wax-in-water suspensions. Particles were smaller, and wax suspensions were better stabilized using Tween 20 and Span 20, compared with Tween 80 and Span 80.

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Alkyl polyglucosides

Cited by 26 publications

References 44 publications

Physicochemical Properties and Phase Behavior of Didecyldimethylammonium Chloride/Alkyl Polyglycoside Surfactant Mixtures

Physicochemical Properties and Phase Behavior of Didecyldimethylammonium Chloride/Alkyl Polyglycoside Surfactant Mixtures

Effects of additives on surfactant phase behavior relevant to bacteriorhodopsin crystallization

Inter-Correlation among the Hydrophilic–Lipophilic Balance, Surfactant System, Viscosity, Particle Size, and Stability of Candelilla Wax-Based Dispersions

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