Ellipsometric study of the displacement of milk proteins from the oil–water interface by the non-ionic surfactant C10E8

2010 ◽  
Vol 12 (18) ◽  
pp. 4590 ◽  
Author(s):  
James P. R. Day ◽  
Paul D. A. Pudney ◽  
Colin D. Bain
Keyword(s):  
Milk Proteins ◽  
Ionic Surfactant ◽  
Water Interface ◽  
Ellipsometric Study ◽  
Oil Water

Ellipsometric Study of Monodisperse Silica Particles at an Oil−Water Interface

Langmuir ◽  
2003 ◽  
Vol 19 (21) ◽  
pp. 8888-8893 ◽  
Author(s):  
Bernard P. Binks ◽  
John H. Clint ◽  
Amro K. F. Dyab ◽  
Paul D. I. Fletcher ◽  
Mark Kirkland ◽  
...  
Keyword(s):  
Silica Particles ◽  
Water Interface ◽  
Monodisperse Silica ◽  
Ellipsometric Study ◽  
Oil Water

Cross-Linking of Milk Proteins with Transglutaminase at the Oil−Water Interface

1997 ◽  
Vol 45 (7) ◽  
pp. 2514-2519 ◽  
Author(s):  
Merete Færgemand ◽  
Brent S. Murray ◽  
Eric Dickinson
Keyword(s):  
Milk Proteins ◽  
Cross Linking ◽  
Water Interface ◽  
Oil Water

Molecular dynamics study of nanoparticles and non-ionic surfactant at an oil–water interface

Soft Matter ◽  
2011 ◽  
Vol 7 (15) ◽  
pp. 6942 ◽  
Author(s):  
R. J. K. Udayana Ranatunga ◽  
Chuong T. Nguyen ◽  
Blake A. Wilson ◽  
Wataru Shinoda ◽  
Steven O. Nielsen
Keyword(s):  
Molecular Dynamics ◽  
Ionic Surfactant ◽  
Water Interface ◽  
Oil Water

scholarly journals Stabilisation of Emulsified Agarwood Oil in an Aqueous System Using Non-Ionic Surfactant

2019 ◽  
Vol 797 ◽  
pp. 186-195
Author(s):  
Boon Yih Tien ◽  
Mohd Nazli Naim ◽  
Rabitah Zakaria ◽  
Noor Fitrah Abu Bakar ◽  
Noraini Ahmad ◽  
...  
Keyword(s):  
Zeta Potential ◽  
Droplet Size ◽  
Ostwald Ripening ◽  
Alkaline Condition ◽  
Ionic Surfactant ◽  
Water Interface ◽  
Oil Droplets ◽  
Emulsified Oil ◽  
Oil Water ◽  
Agarwood Oil

Owing to the annually increasing market value of pure agarwood oil, the extracted agarwood oil from Aquilaria malaccensis was emulsified in an aqueous solution using non-ionic surfactant (Tween 80). The surfactant concentration of 0.0167% was determined as the critical micelle concentration (CMC) with an interfacial tension value of 0.014 mNm-1. The adsorption of surfactant at the oil/water interface at the CMC value, however, reduced the zeta potential of the emulsified oil from –45 to –43 mV, and increased its size from 85 to 89 nm. Outside of the CMC value, the emulsified oil droplets tended to coalesce, owing to insufficient coverage of the surfactant at oil/water interface and Ostwald ripening. The droplet size distribution and zeta potential value of the emulsified oil droplets produced at the CMC were the most stable over a month of storage. No significant changes in the emulsified droplet size occurred when the pH conditions varied from pH 3 to 10. The emulsified droplets images obtained from transmission electron microscopy analysis showed a reduction in the layer thickness of the surfactant from 30 to 10 nm in acidic condition and 30 to 19 nm in alkaline condition. The agarwood oil emulsification at CMC value enhance the stability of chemically unstable compounds from degradation.

scholarly journals Interfacial Properties of β-Lactoglobulin at the Oil/Water Interface: Influence of Starch Conversion Products with Varying Dextrose Equivalents

2020 ◽  
Author(s):  
Theresia Heiden-Hecht ◽  
Marco Ulbrich ◽  
Stephan Drusch ◽  
Monika Brückner-Gühmann
Keyword(s):  
Matrix Material ◽  
Milk Proteins ◽  
Interfacial Properties ◽  
Water Interface ◽  
High Concentration ◽  
Oil Water ◽  
Starch Conversion ◽  
Key Indicators ◽  
The Impact ◽  
Β Lactoglobulin

AbstractIn spray dried emulsions, frequently milk proteins are used as interfacial active components and starch conversion products are added as matrix material at high concentrations. To characterize interfacial properties at the oil/water interface by commonly applied methods, low protein, and carbohydrate concentrations from 1 to 2% are usually analyzed. The impact of a higher concentration of starch conversion products was not investigated so far. Therefore, the formation and rheological properties of β-lactoglobulin (β-LG) stabilized films at the oil/water interface were investigated via short and long-time adsorption behavior using pendant drop tensiometry as well as dilatational and interfacial shear rheology. Suitability of the applied methods to the chosen samples with higher concentrations >1–2% was verified by calculation of selected key numbers like capillary number and by detailed reviewing of the results which is summarized further on as key indicators. It is hypothesized, that the increase in concentration via presence of starch conversion products will delay interfacial stabilization as a result of increased bulk viscosity with decreasing degree of degradation (dextrose equivalent) of the starch. Furthermore, this increase in concentration leads to more stable interfacial films due to thermodynamic incompatibility effects between protein and starch conversion products which results in increases of local protein concentration. Key indicators proved a general suitability of applied methods for the evaluation of the investigated samples. Moreover, results showed an increase in interfacial film stability and elastic properties alongside a decreased interfacial tension if starch conversion products were present in a high concentration.

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