Cubic-Phase-Based Concentrated Emulsions

Rodríguez, Concepción González; Shigeta, Kazuki; Kunieda, H.

doi:10.1006/jcis.1999.6646

Cited by 58 publications

(68 citation statements)

References 34 publications

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“…In other words, the cubic phase is stabilized against temperature by solubilizing oil. Similar thermal-stabilization effect for I 1 phase is also observed in other surfactant systems (4,5).…”

Section: Effect Of Temperature and Oil Molecular Size On The Cubic supporting

confidence: 82%

Effect of Addition and Molecular Size of Triglyceride Oils on Phase Behavior and Surfactant Self-Assemblies

Aramaki

Khalid

2004

J. Oleo Sci.

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Section: Effect Of Temperature and Oil Molecular Size On The Cubic supporting

confidence: 82%

Effect of Addition and Molecular Size of Triglyceride Oils on Phase Behavior and Surfactant Self-Assemblies

Aramaki

Khalid

2004

J. Oleo Sci.

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“…It is interesting that the cloud temperature of the less hydrophilic C 30 EO 42 is slightly higher than that of C 30 EO 94 system. As reported in a previous paper (12), the cloud temperature of polyoxyethylene-type surfactants approaches that of polyoxyethylene aqueous solutions when the EO chain is very long, therefore, there is a maximum in the plot of C m EO n cloud temperature versus EO chain length.…”

Section: Results and Discussion 1 Phase Behavior Of C 30 Eo N In Watersupporting

confidence: 70%

“…The ratios of diffraction peaks of the I 1 phase in C 30 EO 94 aqueous system (Fig. 2) correspond to a body-centered cubic structure, which has been found in other non-ionic surfactant systems (12).…”

Section: Results and Discussion 1 Phase Behavior Of C 30 Eo N In Watersupporting

confidence: 66%

“…It is worth pointing out that for conventional polyoxyethylene type surfactants micellar cubic phases seldom exist at 100 , except for surfactants having bulky, rigid lipophilic groups such as cholesterol (11). It has been found that as the micellar hydrocarbon core gets larger, the thermal stability of the I 1 phase increases (12). The ratios of diffraction peaks of the I 1 phase in C 30 EO 94 aqueous system (Fig.…”

Section: Results and Discussion 1 Phase Behavior Of C 30 Eo N In Watermentioning

confidence: 97%

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Aqueous Phase Behavior of Ultra-Long Polyoxyethylene Surfactants

2004

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Abstract:The aqueous phase behavior of poly(oxyethylene) alkyl ethers (C m EO n ) having both ultra-long hydrophobic and hydrophilic chains (m 30 and n 94 and 42) was investigated. The HLB values of C 30 EO 94 and C 30 EO 42 are 18 and 16, respectively. In C 30 EO 94 system, micellar solution phase (W m ), micellar cubic (I 1 ), hexagonal (H 1 ) and solid surfactant phases (S) are successively formed. The same sequence is observed for C 30 EO 42 system, but the I 1 phase shrinks and the H 1 phase prevails over a wide range of composition. This phase sequence was compared to that of conventional poly(oxyethylene) surfactants and it was found that the surfactant layer curvature of aggregates becomes less positive in a long hydrocarbonchain surfactant system even if the HLB values are the same.

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“…Among the liquid crystals, micellar cubic phase (I 1 ) is the most viscous phase 3) , and hence, gives opportunity to form translucent, highly viscous O/I 1 gel emulsion 4,5) . The micelles in I 1 phase have high positive interfacial curvature; therefore, they are usually found in aqueous solution of highly hydrophilic surfactants and amphiphilic polymers [6][7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Phase Behavior, Formation, and Rheology of Cubic Phase and Related Gel Emulsion in Tween80/Water/Oil Systems

2009

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We investigated the phase behavior, formation, and rheology of the cubic phase (I 1 ) and related O/I 1 gel emulsion in water/Tween 80/oil systems using squalane, liquid paraffin (LP), and decane as oil components. In the phase behavior study, the phase sequences were similar for squalane and LP systems, while a lamellar liquid crystal (L a ) was observed for decane system. In all the systems the addition of oil to W m or H 1 phase induced the I 1 phase, which can solubilize some amounts of oil followed by the appearance of I 1 +O phase. The formation of the O/I 1 gel emulsion has been studied at a fixed w/s (50/50) and we found that 30 wt% decane, 70 wt% squalane, and 60 wt% LP can form the gel emulsion. The water/Tween 80/squalane system has been taken as a model system to study viscoelastic properties of the I 1 phase and O/I 1 gel emulsion. The I 1 phase shows a typical hard gel cubic structure under the frequency and the values of the complex viscosity, |h*| and the elastic modulus, G¢ increase with the addition of squalane, which could be due to the neighboring micellar interaction. On the other hand, the decreasing values of the viscoelastic parameters in the O/I 1 gel emulsion simply relate to the volume fraction of the I 1 phase in the system.

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Cubic-Phase-Based Concentrated Emulsions

Cited by 58 publications

References 34 publications

Effect of Addition and Molecular Size of Triglyceride Oils on Phase Behavior and Surfactant Self-Assemblies

Effect of Addition and Molecular Size of Triglyceride Oils on Phase Behavior and Surfactant Self-Assemblies

Aqueous Phase Behavior of Ultra-Long Polyoxyethylene Surfactants

Phase Behavior, Formation, and Rheology of Cubic Phase and Related Gel Emulsion in Tween80/Water/Oil Systems

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