Characterization of different double-emulsion formulations based on food-grade emulsifiers and stabilizers

This study focused on the preparation and characterization of water-in-oil-in-water (W1/O/W2)-type double emulsions designed by food-grade emulsifiers and stabilizers. The primary objective of this study was to compare different emulsion formulations in terms of droplet size, rheology, and stability and to reduce the amount of polyglycerol poliricinoleate (PGPR). To achieve these goals, PGPR and a PGPR-lecithin blend were utilized in the formation of the primary phase (W1/O), while varying concentrations of guar gum (GG) and gum tragacanth (GT) incorporated in the secondary water phase (W2). Shear thinning behavior was observed for all emulsion formulations. Sauter mean diameters of the emulsions prepared with PGPR as a hydrophobic emulsifier ranged between 30 mu m and 75 mu m, while those prepared with the PGPR-lecithin blend varied between 25 mu m and 85 mu m based on the first day's measurements. In emulsions with the PGPR-lecithin blend, the smallest droplet size was obtained when the GG-GT blend was incorporated in the external aqueous phase. Moreover, GG-GT blends had high consistency coefficients and high apparent viscosity values. It was also observed that PGPR-lecithin containing emulsions were more stable.


Preparation and characterization of W/O/W type double emulsion containing PGPR-lecithin mixture as lipophilic surfactant
ALTUNTAS, Ozlem Yuce; Şümnü, Servet Gülüm; Şahin, Serpil (Informa UK Limited, 2017-01-01)
The objective of this study is to produce double emulsion by combining polyglycerol polyricinoleate (PGPR) with lecithin as lipophilic surfactant. Although lecithin alone produced only oil-in-water type emulsion, the mixture of lecithin and PGPR could produce water-in-oil type emulsion as well. Moreover, different emulsification treatments were applied to study the influence of homogenization methods on the physicochemical characteristics. The obtained double emulsions were compared in terms of stability an...
Study on mechanical properties of perlite-filled gamma-irradiated polypropylene
Akin-Oktem, G; Tanrisinibilir, S; Tincer, T (Wiley, 2001-09-12)
This study covers the preparation and characterization of perlite-filled polypropylene (PP). The compositions of 15, 30, and 50 % by weight perlite-PP composites were prepared by melt-mixing. The PP used in this study was either applied in the virgin form or gamma -irradiated in air at the doses of 10, 25, 50, and 100 kGy to determine the effect of oxidative degradation in composite properties. Furthermore, the active sites containing oxygen produced by gamma -irradiation in PP may provide a possible enhanc...
Preparation and characterization of ultrahigh molecular weight polyethylene and polyisoprene solvent-cast blend films
Akinay, AE; Tincer, T (Wiley, 1998-02-28)
This study covers the preparation of noncrosslinked and crosslinked solvent-cast blend films of ultrahigh molecular weight polyethylene (UHMWPE) and polyisoprene rubber (PIR) and their mechanical, thermal, IR spectroscopic, and morphological characterizations. Solvent-cast films of polymer blends with 0, 10, 20, 35, 50, and 65% PIR composition were prepared by vigorous stirring from a hot decalin solution. The films were crosslinked chemically by using acetophenone as a crosslinking agent under UV radiation...
Fabrication of gallic acid loaded Hydroxypropyl methylcellulose nanofibers by electrospinning technique as active packaging material
Aydogdu, Ayca; Şümnü, Servet Gülüm; Şahin, Serpil (Elsevier BV, 2019-03-15)
The objective of this study was to encapsulate gallic acid in Hydroxypropyl methylcellulose (HPMC)/poly-ethylene oxide (PEO) blend nanofiber by using electrospinning and examine the usage of nanofibers as active packaging materials. Gallic acid loaded nanofibers showed homogenous morphology. Gallic acid was loaded into nanofibers efficiently and nanofibers showed strong antioxidant activity. As the gallic acid amount increased, the TGA curves had shifted one stage to two stage degradation and degradation te...
Effect of preparation parameters on performance of dense homogeneous polycarbonate gas separation membranes
Hacarlioglu, P; Toppare, Levent Kamil; Yılmaz, Levent (Wiley, 2003-10-17)
The aim of this study is to determine the effect of preparation parameters on the membrane permeation mechanism and separation performances of dense homogeneous poly(bisphenol A carbonate) (PC) membranes. Blade-casting and drop-casting techniques are used for casting films from solutions with varying concentrations. Chloroform and methylene chloride are used to determine the effect of the properties of the casting solvent. Permeation measurements are done with Ar, N-2, O-2, CH4, CO2, and H, gases. The selec...
Citation Formats
E. T. PULATSU, S. Şahin, and S. G. Şümnü, “Characterization of different double-emulsion formulations based on food-grade emulsifiers and stabilizers,” JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY, pp. 996–1002, 2018, Accessed: 00, 2020. [Online]. Available: