Hydrogels from diacylphosphatidylcholine

Shinto, K.; Hoffmann, H.; Watanabe, Kei; Teshigawara, Takashi

doi:10.1007/s00396-011-2527-4

Cited by 8 publications

(14 citation statements)

References 15 publications

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“…However, no vesicles were observed in PC solutions of pure 1,3-butanediol. The gelatin was due to the fact that PC molecules are transferred from the liquid to the crystalline state while the morphology in the solutions remained the same [9]. With increasing 1,3-butanediol contents at temperature below 65°C, it can be clearly observed that the phase behavior goes through a two-phase region followed by turbid region, and then a two-phase region, and finally a birefringent phase is achieved.…”

Section: Phosphocholine In 13-butanediol/water Mixed Solventsmentioning

confidence: 85%

“…al. [9]. The authors have found that the gel network consists of densely packed vesicles in which the bilayers are in the crystalline state.…”

Section: Phosphocholine In 13-butanediol/water Mixed Solventsmentioning

confidence: 96%

“…The sample in pure 1,3-butanediol is classified as organogel [9]. In such type of gel, the minor components of the system form a three-dimensional network in the solvent, and the solvent is entrapped in the network by capillary forces [9].…”

Section: Phosphocholine In 13-butanediol/water Mixed Solventsmentioning

confidence: 99%

“…Additionally, in such polar solvent, the surfactants are aggregated into micelles even at low surfactant concentrations, and adding 1,3-butanediol to surfactant solutions would provide extra degrees of freedom in changing the rheological properties of these solutions [9].…”

Section: Introductionmentioning

confidence: 99%

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1,3-Butanediol as a co-solvent for the surfactant solutions

Abdel‐Rahem

2012

Colloid Polym Sci

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A biphasic solution containing water and precipitated phosphocholine (PC) is presented in order to investigate the consequences of 1,3-butanediol addition on the phase behavior of PC at different 1,3-butanediol concentrations and temperature values. With increasing the concentration of 1,3-butanediol in the mixed solvent at room temperature, the biphasic solution converts into turbid phase, two phase, and finally to a clear phase that is birefringent when viewed between two crossed polarizers. The birefringent phase moves to lower 1,3-butanediol contents at higher temperature values. The birefringent phase was observed via polarizing microscopy, and its rheological parameters were measured with cone plate method. In high 1,3-butanediol contents, solutions with 2.5% of PC behave as a gel with high yield stress value. The micellization of cetyltrimethyammonium bromide (CTAB) in a series of 1,3-butanediol/water mixed solvent at room temperature was also investigated. From the conductivity measurements, the critical micelle concentration and the degree of counterion dissociation of CTAB were obtained as a function of 1,3-butanediol. Standard free energy of micellization, as a function of 1,3-butanediol contents, was also estimated and discussed. Gibbs energies of micellization were found to have a good correlation with dielectric constant and Gordon parameters.

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Section: Phosphocholine In 13-butanediol/water Mixed Solventsmentioning

confidence: 85%

“…al. [9]. The authors have found that the gel network consists of densely packed vesicles in which the bilayers are in the crystalline state.…”

Section: Phosphocholine In 13-butanediol/water Mixed Solventsmentioning

confidence: 96%

Section: Phosphocholine In 13-butanediol/water Mixed Solventsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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1,3-Butanediol as a co-solvent for the surfactant solutions

Abdel‐Rahem

2012

Colloid Polym Sci

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“…The influence of some co-solvents like glycerol and ethylene glycol on the phase behavior and micellization of surfactant solutions is often reported in the literature [1][2][3][4][5][6]. In such co-solvents, the surfactants are aggregated into micelles even at low surfactant concentrations and adding co-solvent to surfactant solutions would provide extra degrees of freedom in changing the rheological properties of these solutions [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of 1,3‐Butanediol on the Viscoelasticity of Surfactant Solutions

Abdel‐Rahem

2013

J Surfact & Detergents

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The rheological behavior of rodlike micelles in a 1,3‐butanediol/water mixed solvent was investigated. The rodlike micelles were prepared by mixing sodium salicylate, with cetyltrimethylammonium bromide. When water was replaced by 1,3‐butanediol, the viscosity maxima decreased drastically. The viscosity minimum, on the other hand, increased at low 1,3‐butanediol contents and decreased again at higher amounts of 1,3‐butanediol. As a result of the opposite changes the two maxima were replaced by a single maxima when the content of 1,3‐butanediol was 15 %. The change in the viscosity was a consequence of a change in the structural relaxation times while the storage moduli remained constant. The stress relaxation was due to a reptation mechanism at maximum points while at the minimum of the viscosity the mechanism was due to a kinetic controlled mechanism.

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Structure formation in surfactant solutions

Hoffmann

2012

Advances in Colloid and Interface Science

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Hydrogels from diacylphosphatidylcholine

Cited by 8 publications

References 15 publications

1,3-Butanediol as a co-solvent for the surfactant solutions

1,3-Butanediol as a co-solvent for the surfactant solutions

Influence of 1,3‐Butanediol on the Viscoelasticity of Surfactant Solutions

Structure formation in surfactant solutions

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