Phase diagrams and microstructure of aggregates in mixed ionic surfactant/foam booster systems

Rodríguez, Concepción González; Sakai, Tomomi; Fujiyama, Rika; Kunieda, H.

doi:10.1016/j.jcis.2003.09.022

Cited by 19 publications

(7 citation statements)

References 16 publications

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“…4) obtained from SAXS obey the relationship 1 : 1/ √ 3. Comparing the photograph with that reported in the literature [17][18][19][20][21][22][23], it can be confirmed that the anisotropic phase is hexagonal liquid crystal. Sample a 3 is the sample of V region, in photograph B (Fig.…”

Section: Structure Determination Of Lyotropic Liquid Crystals In the supporting

confidence: 71%

Phase behaviors of Gemini cationic surfactants/n-butanol/water systems

Wei

Yin

et al. 2010

Fluid Phase Equilibria

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Section: Structure Determination Of Lyotropic Liquid Crystals In the supporting

confidence: 71%

Phase behaviors of Gemini cationic surfactants/n-butanol/water systems

Wei

Yin

et al. 2010

Fluid Phase Equilibria

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“…Among other additives, alkanoylethanolamides are widely used in surfactants formulations as viscosity enhancers. , However, only few studies have been reported on the properties of these mixed systems . Recently, we reported on the phase behavior and microstructure of a new kind of alkanoylethanolamide . The aim of this paper is to extend that study to other homologues, focusing on the relationship between phase diagrams, rheological behavior, and microstructure.…”

Section: Introductionmentioning

confidence: 99%

Phase and Rheological Behavior of Surfactant/Novel Alkanolamide/Water Systems

et al. 2003

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Phase diagrams of water; sodium dodecyl sulfate (SDS); and a new foam booster, alkanoyl-Nmethylethanolamide (C8, NMEA-8; C12, NMEA-12; C16, NMEA-16), were constructed at 25 °C. NMEA is hardly soluble in water: liquid-liquid phase separation occurs with NMEA-8, lamellar-phase formation occurs with NMEA-12, and solid precipitation occurs with NMEA-16. In the presence of a small amount of NMEA, the surfactant hexagonal phase (H1) is extended to the dilute region. In the aqueous micellar solution beyond the H1 phase, the viscosity dramatically increases and a viscoelastic solution is formed in NMEA-12 and NMEA-16 systems. The viscoelastic micellar solution formed in SDS-NMEA-12 systems follows the Maxwell model typical of wormlike micellar systems at low shear frequencies. In the SDS-NMEA-16 system, a gel-like highly viscoelastic solution is formed in the maximum-viscosity region. Rheological measurements show that the ability of NMEA to induce micellar growth increases in the following order: NMEA-8 , NMEA-12 < NMEA-16. In agreement with this result, dynamic light scattering measurements show that with an increasing mixing fraction of NMEA-12 or NMEA-16 in SDS-NMEA systems the micellar size increases, leading to the formation of wormlike micelles.

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“…For ChEO 15 , ChEO 10 , and NMEA-12 the reported densities, 1.084 g cm −3 [9], 1.080 g cm −3 [9], and 0.9299 g cm −3 [10], respectively, were used.…”

Section: Molar Volume Of Componentsmentioning

confidence: 99%

“…For the L α phase, the following equations were used to determine the length of the lipophilic part of the surfactant, d L , and the cross sectional area per surfactant at the interface, a s , [10],…”

Section: The Phase Diagram Of the Cheo 15 /Nmea-12/ Water Systemmentioning

confidence: 99%

“…The ChEO 10 /NMEA-12 mass ratio is kept fixed to 9/1. T = 25 • C. Table 2 Variation of unit cell dimension and aggregate size parameters of the R 1 phase in the ChEO 10 /NMEA-12/water system (a) with increasing weight fraction of total surfactant in the system, W s , at fixed ChEO 10 :NMEA-12 mixing ratio of 9:1 by weight and (b) with increasing weight fraction of NMEA-12 in the system, W , at fixed ChEO 10 …”

Section: The Phase Diagram Of the Cheo 10 /Nmea-12/ Water Systemmentioning

confidence: 99%

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