Some Aspects of Emulsion Instability on Using Sorbitan Monooleate (Span 80) as a Surfactant in Liquid Emulsion Membranes

1990 ◽  
Vol 62 (5) ◽  
pp. 420-421 ◽  
Author(s):  
I. Abou-Nemeh ◽  
A. P. Van Peteghem
Keyword(s):  
Sorbitan Monooleate ◽  
Liquid Emulsion ◽  
Span 80

scholarly journals Anti-Agglomeration Effects of Biodegradable Surfactants from Natural Sources on Natural Gas Hydrate Formation

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1107
Author(s):  
Seong-Pil Kang ◽  
Dongwon Lee ◽  
Jong-Won Lee
Keyword(s):  
Oil And Gas ◽  
Hydrate Formation ◽  
Flow Characteristics ◽  
Cost Effective ◽  
Sorbitan Monooleate ◽  
Natural Sources ◽  
Gas Hydrate Formation ◽  
Agglomeration Effects ◽  
Span 80 ◽  
Water Cut

Kinetic hydrate inhibitors (KHI) and anti-agglomerants (AA) rather than thermodynamic hydrate inhibitors (THI) are often used for flow assurance in pipelines. This is because they require much lower dosages than thermodynamic inhibitors. Although the hydrate-phase equilibria are not affected, KHI and AA prevent the formed hydrate crystals from growing to a bulky state causing pipeline blockage. However, these KHIs might have huge environmental impact due to leakages from the pipelines. In this study, two biodegradable AA candidates from natural sources (that is, lecithin and lanolin) are proposed and their performances are evaluated by comparing them with and without a conventional AA (Span 80, sorbitan monooleate). At 30% and 50% water cut, the addition of AA materials was found to enhance the flow characteristics substantially in pipelines and hardly affected the maximum value of the rotational torque, respectively. Considering the cost-effective and environmental advantages of the suggested AA candidates over a conventional AA such as Span 80, the materials are thought to have potential viability for practical operation of oil and gas pipelines. However, additional investigations will be done to clarify the optimum amounts and the action mechanisms of the suggested AAs.

scholarly journals Microfluidic Formation of Honeycomb-Patterned Droplets Bounded by Interface Bilayers via Bimodal Molecular Adsorption

Micromachines ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 701 ◽  
Author(s):  
Shougo Fujiwara ◽  
Kan Shoji ◽  
Chiho Watanabe ◽  
Ryuji Kawano ◽  
Miho Yanagisawa
Keyword(s):  
Lipid Bilayers ◽  
Droplet Surface ◽  
Single Step ◽  
Minimal Models ◽  
Sorbitan Monooleate ◽  
Span 80 ◽  
The Difference ◽  
Surfactant Composition ◽  
Adsorption Rates ◽  
Honeycomb Pattern

Assembled water-in-oil droplets bounded by lipid bilayers are used in synthetic biology as minimal models of cell tissue. Microfluidic devices successfully generate monodispersed droplets and assemble them via droplet interface bilayesr (DIB) formation. However, a honeycomb pattern of DIB-bounded droplets, similar to epithelial tissues, remains unrealized because the rapid DIB formation between the droplets hinders their ability to form the honeycomb pattern. In this paper, we demonstrate the microfluidic formation of a honeycomb pattern of DIB-bounded droplets using two surfactants with different adsorption rates on the droplet surface. A non-DIB forming surfactant (sorbitan monooleate, Span 80) was mixed with a lipid (1,2-dioleoyl-sn-glycero-3-phosphocholine, PC), whose adsorption rate on the droplet surface and saturated interfacial tension were lower than those of Span 80. By changing the surfactant composition, we established the conditions under which the droplets initially form a honeycomb pattern and subsequently adhere to each other via DIB formation to minimize the interfacial energy. In addition, the reconstituted membrane protein nanopores at the DIBs were able to transport molecules. This new method, using the difference in the adsorption rates of two surfactants, allows the formation of a honeycomb pattern of DIB-bounded droplets in a single step, and thus facilitates research using DIB-bounded droplet assemblies.

Carrier Assisted Emulsion Liquid Membrane Process for Recovery of Basic Dye from Wastewater using Continuous Extractor

2014 ◽  
Vol 67 (2) ◽  
Author(s):  
Norasikin Othman ◽  
Ooi Zing-Yi ◽  
Norlisa Harruddin ◽  
Raja Norimie ◽  
Norela Jusoh ◽  
...  
Keyword(s):  
Textile Industry ◽  
Liquid Membrane ◽  
Volume Ratio ◽  
Extraction Process ◽  
Membrane Phase ◽  
Emulsion Liquid Membrane ◽  
Sorbitan Monooleate ◽  
Internal Phase ◽  
Span 80 ◽  
Dye Extraction

Nowadays, water pollution has become major issue especially dye contaminated wastewaters from the textile industry. Dye causes serious environmental pollution and health problems. The removal of color from dye-contaminated wastewaters in the related industries becomes a major concern all over the world. In this research, several parameters of dye extraction and recovery in the continuous emulsion liquid membrane (ELM) process were investigated. This process consisted of three phases which are external (feed) phase, membrane phase and internal phase. The membrane phase was prepared by dissolving extractant bis(2-ethylhexyl)phosphoric acid (D2EHPA) and hydrophobic surfactant sorbitan monooleate (Span 80) in kerosene as diluents. The internal phase consisted of an aqueous solution of sulfuric acid (H2SO4). The important parameters governing the extraction process of dye such as stirring speed, initial dye concentration, Span 80 concentration and treat ratio (volume ratio of emulsion to external phase) were studied. The results showed that the optimum condition for 25ppm initial concentration of dye extraction are 250 rpm stirring speed, 5% (w/v) Span 80 and treat ratio 1:5. At this condition, the percentage of dye extraction, stripping and recovery were 98%, 82% and 81% respectively. Hence, continuous ELM technique is proven to be a very promising technique in industrial wastewater treatment and recovery of dye.

The importance of formulating insect growth regulators with surfactants and their blends for the control of the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

1985 ◽  
Vol 6 (2) ◽  
pp. 183-186 ◽  
Author(s):  
J. N. Mkhize ◽  
A. P. Gupta
Keyword(s):  
Growth Regulators ◽  
Half Life ◽  
Sitophilus Oryzae ◽  
Residual Activity ◽  
Tween 80 ◽  
Insect Growth Regulators ◽  
Sorbitan Monooleate ◽  
Insect Growth ◽  
Span 80 ◽  
Wheat Kernels

AbstractThe use of surfactants and their blends to improve the penetration of two insect growth regulators (IGRs; hydroprene and R-20458) into wheat kernels was investigated. It was found that formulation of IGRs with a surfactant, Tween-85 (polyoxyethylene trioleate), increased mortality and/or effectiveness of the IGRs. Formulation of hydroprene with a blend of Span-80 (sorbitan monooleate) with Tween-80 (polyoxyethylene monooleate) produced results comparable to those by hydroprene with Tween-85. However, formulations of IGRs with surfactants with high or low hydrophile-lipophile balance (HLB), failed to provide suitable control of the weevil, probably due to the type of emulsions formed. The same results were obtained with hydroprene formulations with blends of Spans and Tweens, even though their HLBs were close to that of Tween-85. Residual half-life for hydroprene was about three months; formulations with Tween-85 or a blend of Span-80 did not enhance the residual activity for hydroprene in wheat.

scholarly journals Phase Manifestation and Formation of Nanoemulsions Composed of Imidazolium-based Ionic Liquid, Tween 80/Span 80 and Labrafac Lipophile WL 1349

2017 ◽  
Vol 32 (2) ◽  
pp. 85
Author(s):  
S. H. Ng ◽  
P. M. WOI ◽  
C. C. ENG
Keyword(s):  
Ionic Liquid ◽  
Phase Diagrams ◽  
Ternary Phase ◽  
Single Phase ◽  
Tween 80 ◽  
Continuous Phase ◽  
Good Stability ◽  
Sorbitan Monooleate ◽  
Ternary Phase Diagrams ◽  
Span 80

onic liquids (ILs) can enhance topical and transdermal delivery, as well as increase the solubility of sparingly soluble drugs. In the present work, pseudo-ternary phase diagrams of emulsions were composed of a mixture of non-ionic surfactants, polyoxyethylene sorbitan monooleate (Tween 80®) and sorbitan monooleate (Span 80®) in weight fraction: 1:1, 1:2, 2:1 and 2:3, LabrafacTM Lipophile WL 1349 as an oil phase and 1-hexyl-3-methylimidazolium chloride [(HMIM) (Cl)] as a continuous phase. Emulsion formulations were selected with 10% surfactants from the pseudo-ternary phase diagrams and further prepared at 298.2 ± 0.1 K. Acoustic emulsificationmethod was used to prepare nanoemulsions that were mixed with freshly prepared hydrocolloid gum. The area of the single-phase zone in pseudo-ternary phase diagrams that varied with Tween 80® /Span 80® ratio in the order of 2:1 > 1:1 > 2:3 > 1:2 where Span 80® was replaced by an equivalent weight of Tween 80®  to form IL-based nanoemulsions. [HMIM] [Cl] tended to create a two-phase system. Addition of carbopol® ultrez 20 copolymer into the continuous phase of the formulations gave single-phase nanoemulsions with good stability. The mixture of surfactants with weight ratio of 1:2 (Tween 80®/Span 80®) showed a good stability with the smallest particle size and greater surface charges in the system. These ionic liquid-based nanoemulsions might have the potential in drug delivery systems.

scholarly journals Influence of the span 80/Gelatin B combination on the formulation and stabilization of Argan oil-in-water emulsions

2020 ◽  
Vol 11 (4) ◽  
pp. 7182-7191
Author(s):  
Aicha Fahry ◽  
Yassir El Alaoui ◽  
Younes Rahali ◽  
Nawal Charkaoui ◽  
Abdelkader Laatiris
Keyword(s):  
Lipid Phase ◽  
Type B ◽  
Sorbitan Monooleate ◽  
Simultaneous Application ◽  
Stability Properties ◽  
Argan Oil ◽  
Oil In Water ◽  
Span 80 ◽  
The Stability ◽  
Droplet Charge

The present study aims to evaluate the effect of the combination of a linear protein: Gelatin type B and an oil-soluble emulsifier Span 80 (sorbitan monooleate) in the stabilization of argan oil-in-water emulsions. For this purpose, the emulsifiying properties of Gelatin itself with Argan oil as lipid phase were investigated first, by preparing oil-in-water (O/W) emulsions containing 10  wt%.  Argan oil and varying Gelatin concentrations (0.5-2 % w/w), we have also formulated Argan O/W emulsions by span 80 alone at levels ranging from 1 to 6 wt%. Subsequentely, we explored the influence of the simultaneous application of the Span 80 and the gelatine on the stability properties and on the droplets size of Argan O/W emulsions, using different mixtures of the two emulsifiers. We compared the stability properties (flocculation, creaming, and phase separation) of argan O/W emulsions prepared with type B gelatine as the only emulsifier with those of emulsions prepared with span 80 and mixture of gelatin/Span. For stable emulsions, our analysis was completed with measurement of droplets size and Zeta Potential. Finally, all of the experimental results and the storage time showed that the emulsions prepared by 10 wt% argan oil and 2 (w/w) % Gelatin+ 3 wt% Span 80 were the most stable with optimum conditions for minimal creaming, small droplets size (size <1µm) and high net droplet charge (absolute value of ZP > 23). The presence of span 80 in coexistence with gelatin, even in small quantitiees, has a profound influence on the stability of the argan O/W emulsions.

scholarly journals Antioxidant Effect of Vitamins in Olive Oil Emulsion

2020 ◽  
Vol 4 (2) ◽  
pp. 23 ◽  
Author(s):  
Francesca Cuomo ◽  
Giuseppe Cinelli ◽  
Catalina Chirascu ◽  
Emanuele Marconi ◽  
Francesco Lopez
Keyword(s):  
Vitamin E ◽  
Vitamin C ◽  
Olive Oil ◽  
Virgin Olive Oil ◽  
Antioxidant Effect ◽  
High Concentration ◽  
Sorbitan Monooleate ◽  
Peroxide Values ◽  
Span 80 ◽  
Oil Emulsions

In this study, water-in-extra virgin olive oil emulsions were enriched with vitamins. Water-in oil emulsions are heterogeneous systems able to solubilize both hydrophilic and hydrophobic compounds. Thus, hydrophilic vitamin C and lipophilic vitamin E were loaded separately or together in emulsion. A suitable emulsion composition was selected after considering different surfactant (mono and diglycerides of fatty acids, E471; sorbitan monooleate, Span 80; polyoxyethylene sorbitan monooleate, Tween 80) and water concentrations. The most appropriate emulsion, for the high stability, resulted the one containing concentrations of Span 80 1% w/w and water 1% w/w. The antioxidant effect of vitamins in emulsions was studied considering the variation of the peroxide values during storage. The oxidation reaction was slowed down in emulsions containing vitamin C, but it was quickened by the loading of vitamin E for its high concentration. In emulsions containing vitamin E, indeed, the peroxide values were higher than in emulsions prepared in the absence of vitamins or in oil. The antioxidant activity generated by the co-loading of vitamin C and E was very effective to the point that in presence of high amounts of vitamins the peroxide values did not change in about 40 days of storage, due to the vitamin E regeneration by vitamin C.

Temperature-Sensitive Nonionic Vesicles Prepared from Span 80 (Sorbitan Monooleate)

Langmuir ◽  
2008 ◽  
Vol 24 (19) ◽  
pp. 10762-10770 ◽  
Author(s):  
Keiichi Kato ◽  
Peter Walde ◽  
Norio Koine ◽  
Sosaku Ichikawa ◽  
Takashi Ishikawa ◽  
...  
Keyword(s):  
Temperature Sensitive ◽  
Sorbitan Monooleate ◽  
Span 80

Removal of Carbon Dioxide by Emulsion Liquid Membrane Containing Blended Amine

2015 ◽  
Vol 1113 ◽  
pp. 481-485
Author(s):  
Siti Balqis Mohd Najib ◽  
Khairul Sozana Nor Kamaruddin
Keyword(s):  
Carbon Dioxide ◽  
Absorption Rate ◽  
Liquid Membrane ◽  
Cost Effective ◽  
Main Concern ◽  
Liquid Emulsion ◽  
Effective Technology ◽  
Naoh Solution ◽  
Span 80 ◽  
The Stability

The capture of carbon dioxide (CO2) by aqueous alkanolamine is the most cost effective technology available today. However, some problem such as amine losses, corrosion and low absorption rate arise when aqueous alkanolamines is used as an absorbent. To overcome these problems, liquid emulsion was introduced as an alternative for CO2 removal. However, the main concern of using liquid emulsion is the stability of the emulsion. In this study, a formulation containing mixture of blended alkanolamine was used. Methyldiethanolamine (MDEA) and 2-amino-2-methyl-1-propanol (AMP) were used as extractants and were mixed with sodium hydroxide (NaOH) solution to form the aqueous phase. Meanwhile, the organic phase consists of kerosene and Span 80. The emulsion was prepared by homogenizing both phases at speed of 10 000 rpm for five minutes. The stability of the MDEA-AMP emulsion was determined and the CO2 absorption by the emulsion was measured. This study showed that using 8 mL MDEA and 4mL AMP, the stability of the emulsion was 74.00% and 48.05% of CO2 was removed.

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