Phase Behavior of Vegetable Oil-Based Ionic Liquid Microemulsions

Wang, Aili; Chen, Li; Jiang, Dongyu; Yan, Zongcheng

doi:10.1021/je400595k

Cited by 14 publications

(8 citation statements)

References 26 publications

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“…The results obtained by Djekic et al [ 11 ] suggested that dilutable olive oil microemulsions could only be formed at a surfactant-to-cosurfactant mass ratio of 1:9, whereas a medium-chain triglyceride was easier to disperse as a microemulsion. In addition, a recent publication successfully developed a dilutable microemulsion composed of soybean oil, ionic liquid, TX-100, and n-butanol [ 12 ]. Although some dilutable triglyceride microemulsions have been prepared as described above, their applications in food are still limited to non-food grade surfactants or co-surfactants.…”

Section: Introductionmentioning

confidence: 99%

Solubilization of Tea Seed Oil in a Food-Grade Water-Dilutable Microemulsion

et al. 2015

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Food-grade microemulsions containing oleic acid, ethanol, Tween 20, and water were formulated as a carrier system for tea seed oil (Camellia oleifera Abel.). The effect of ethanol on the phase behavior of the microemulsion system was clearly reflected in pseudo-ternary diagrams. The solubilization capacity and solubilization efficiency of tea seed oil dispersions were measured along the dilution line at a 70/30 surfactant/oil mass ratio with Tween 20 as the surfactant and oleic acid and ethanol (1:3, w/w) as the oil phase. The dispersed phase of the microemulsion (1.5% weight ratio of tea seed oil to the total amount of oil, surfactant, and tea seed oil) could be fully diluted with water without phase separation. Differential scanning calorimetry and viscosity measurements indicated that both the carrier and solubilized systems underwent a similar microstructure transition upon dilution. The dispersion phases gradually inverted from the water-in-oil phase (< 35% water) to the bicontinuous phase (40–45% water) and finally to the oil-in-water phase (> 45% water) along the dilution line.

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Section: Introductionmentioning

confidence: 99%

Solubilization of Tea Seed Oil in a Food-Grade Water-Dilutable Microemulsion

et al. 2015

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“…Figure 3 23 It has been reported that the phase-forming capacity of a traditional water−oil microemulsion depended on the packing symmetry between the surfactant and water−oil phases. 28 9 Our previous work showed that after altering a quarter of TX-100 by [C 8 mim][Cl] in castor oil-based ionic liquid microemulsions, the driving force of constructing microemulsions would be enhanced and the S ME in the pseudoternary phase diagram would be enlarged.…”

Section: [Bmim][tf 2 N]-based Microemulsion > [Bmim][pf 6 ]-Based Micmentioning

confidence: 99%

“…23 For castor oil-based systems, the microemulsion region areas increased with the increase of temperature and K m . In this paper, we further explored the effects of ionic liquid anions and cations, surfactant types, and cosurfactant chain length on the phase behavior of castor oil-based ionic liquid microemulsions.…”

Section: Introductionmentioning

confidence: 95%

“…Our previous study showed that the phase behavior of vegetable oil-based ionic liquid microemulsions were temperature and K m (the mass ratio of surfactant to cosurfactant) sensitive. 23 For castor oil-based systems, the microemulsion region areas increased with the increase of temperature and K m . In this paper, we further explored the effects of ionic liquid anions and cations, surfactant types, and cosurfactant chain length on the phase behavior of castor oil-based ionic liquid microemulsions.…”

Section: Introductionmentioning

confidence: 95%

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Phase Behavior of Castor Oil-Based Ionic Liquid Microemulsions: Effects of Ionic Liquids, Surfactants, and Cosurfactants

Wang

Chen

et al. 2015

J. Chem. Eng. Data

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Castor oil-based ionic liquid microemulsions are promising alternatives for petroleum-based biolubricant basestocks. This study presents the phase behavior of castor oil-based ionic liquid microemulsions through phase manifestation, and the areas of the single-phase domain (S ME ) were calculated accordingly to further illustrate the phase-forming capacities of the designed microemulsions. The results indicated that the phase-forming capacities of castor oil-based ionic liquid microemulsions depended largely on the ionic liquid ions, surfactant types, and cosurfactant chain lengths. The S ME of different anion-based ionic liquid microemulsions showed the following sequences: [BMIM][Tf 2 N]-based > [BMIM][PF 6 ]-based > [BMIM][BF 4 ]-based. The longer carbon chain of ionic liquid cations in single surfactant-based systems and the larger percentage of ionic liquid-based surfactant in mixed surfactants-based systems both gave rise to the phase-forming capacities of castor oil-based ionic liquid microemulsions. Given the presence of ionic liquid−castor oil amphiphilic balance in the designed systems, the castor oil−surfactant micelles achieved maximum solubilization capacity for [BMIM][BF 4 ] when the ethoxylated groups' number of surfactant was about eight in single surfactant microemulsion.In addition, n-hexanol donated a higher phase-forming capacity than n-butanol, while n-octanol brought about a different phase behavior due to the spontaneous curvature effect and oil nature of long-chain alcohols (C ≥ 7) in the castor-oil based ionic liquid microemulsions. Thus, this study presented useful information for formulating optimum castor oil-based ionic liquid microemulsion biolubricants based on different ionic liquids, surfactants, and cosurfactants, which were not evaluated in previous research.

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“…[9][10][11][12] Our previous study also indicated that vegetable oil-based ionic liquid microemulsions may have potential as biolubricant basestocks, and the phase behavior of ionic liquid-in vegetable oil microemulsions were further detailed in recent studies. [13][14][15] In order to response to the requirements of lubrication efficiency positively, the development and application of additives, particular at the nanoscale, have made a rapid growth over the past few years, because lubricants with nanoparticles as additives (hereaer referred to as "nanolubricants") can offer excellent anti-wear and friction-reducing properties. [16][17][18][19][20] Numerous nanoparticles, particularly Cu, have been investigated as component of nanolubricants.…”

Section: Introductionmentioning

confidence: 99%

In situ synthesis of copper nanoparticles within ionic liquid-in-vegetable oil microemulsions and their direct use as high efficient nanolubricants

Wang

Chen

et al. 2014

RSC Adv.

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The current study highlighted a simple, efficient and environmentally friendly preparation method of a new type of nanolubricant. Herein, copper nanoparticles were successfully in situ synthesized within ionic liquidin-vegetable oil microemulsions, and the as-prepared systems could be used as high-performance nanolubricants directly. Ascorbic acid and copper chloride were used as the raw materials for the synthesis of copper nanoparticles, whereas the castor oil, 1-butyl-3-methylimidazolium tetrafluoroborate and Triton X-100 were employed for the formulation of ionic liquid microemulsions. The copper-based ionic liquid-in-vegetable oil nanolubricants were characterized by dynamic light scattering, UV-visible spectra and a four-ball tribological tester, which confirmed the formation of copper nanoparticles and the improvement of the friction performance. The SEM micrographs and EDX chemical analysis were carried out to analyze the friction surface after sliding. The results showed that the designed nanolubricants presented an enhanced lubricating property compared to the neat ionic liquid microemulsion. In addition, the mechanism of the in situ synthesis of nanoparticles within nonaqueous ionic liquid microemulsions was discussed.

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Phase Behavior of Vegetable Oil-Based Ionic Liquid Microemulsions

Cited by 14 publications

References 26 publications

Solubilization of Tea Seed Oil in a Food-Grade Water-Dilutable Microemulsion

Solubilization of Tea Seed Oil in a Food-Grade Water-Dilutable Microemulsion

Phase Behavior of Castor Oil-Based Ionic Liquid Microemulsions: Effects of Ionic Liquids, Surfactants, and Cosurfactants

In situ synthesis of copper nanoparticles within ionic liquid-in-vegetable oil microemulsions and their direct use as high efficient nanolubricants

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