• Title/Summary/Keyword: Polyglycerol ester

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A Study on the Stability of Emulsion by Polyglycerol Ester (폴리글리세롤 에스터를 이용한 안정한 에멀젼의 제조연구)

  • Kang, Ki-Chun;Jeong, Noh-Hee
    • Journal of the Korean Applied Science and Technology
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    • v.30 no.1
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    • pp.152-159
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    • 2013
  • Experiments of emulsion particles state of using polyglycerol ester emulsifier and the stability in accordance with the change of time were conducted using several oil. Experimental results confirmed that there is little difference in the stability and particle size depending on the type of oil. Most stable oil with polyglycerol ester is polar oil of silicon series and fatty acid ester oil, hydrocarbon oil of the nonpolar oil (Mineral oil, squalane, polydecene) was the most unstable state. And vegetable oils showed the stable form of particles with polyglycerol ester emulsifier.

Recent Trends in Research of Polyglycerin Fatty Acid Esters (폴리글리세린지방산에스터의 최근 연구동향(제1보))

  • Rang, Moon Jeong
    • Journal of the Korean Applied Science and Technology
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    • v.36 no.4
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    • pp.1443-1459
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    • 2019
  • Polyglycerol fatty acid ester nonionic surfactants have been used for a long time in foods and have been suggested as an alternative to the safety problems of PEG based nonionic surfactants. The polyglycerol fatty acid ester surfactants are synthesized by combining a hydrophilic polyglycerin and a lipophilic fatty acid. The hydrophilic polyglycerin is polymerized using glycerin, glycidol, epichlorohydrin, etc. The main issues of the polyglycerol polymerization reaction are to increase the content of the polyglycerol in the form of linear rather than branched or cyclic forms and to narrow the distribution of the degree of polymerization. The method of binding a lipophilic fatty acid group to a hydrophilic polyglycerin includes chemical synthesis such as esterification reaction and enzyme synthesis using lipase enzyme. The main issues of polyglycerin fatty acid ester synthesis are to increase the yield and to control the degree of esterification while reducing side reactions.

Effects of Emulsifier Additions on the Physical Properties of Extruded Psyllium (유화제 첨가에 따른 차전자피 압출성형물의 물리적 특성)

  • Lee, Jung Won;Ryu, Gi Hyung
    • Food Engineering Progress
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    • v.23 no.2
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    • pp.118-124
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    • 2019
  • This study aims to investigate the physical properties of extruded psyllium husk upon the addition of emulsifiers. Three different emulsifiers-glycerol monostearate (GMS), polyglycerol ester (PGE), and sugar ester (SE)-were added to the mixture of psyllium husk and rice powder before extrusion. Extrusion was performed using a twin-screw extruder at 140℃ die temperature, 200 rpm screw speed, and 16% feed moisture content. The physical properties of psyllium husk extrudates including expansion ratio, specific length, piece density, texture profile, color properties, water soluble index, and water absorption index were evaluated. It was observed that the expansion ratio was the highest while the specific length and piece density were the lowest in the control which had no emulsifiers. Texture profile analysis showed that the apparent elastic modulus and breaking strength were highest in the extrudate with a PGE of 0.1%. The adhesiveness was found to be lowest in the extrudates with an SE of 0.1% and GMS of 0.5%. Lightness value was highest in the extrudate with a PGE of 0.1%. Color difference, water soluble index, and water absorption index were highest in the control. The results reveal that some physical properties of extruded psyllium husk were improved with the addition of emulsifiers. This finding provides useful information for the development of psyllium snacks with good physical characteristics.

Stabilization of Nanoemulsion Using PEG-free Surfactant (PEG-free 계면활성제를 사용한 Nanoemulsion의 안정화)

  • Kim, Huiju;Jung, Taek Kyu;Kim, Ja Young;Yoon, Kyung-Sup
    • Journal of the Korean Applied Science and Technology
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    • v.36 no.2
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    • pp.434-447
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    • 2019
  • Polyethylene glycol (PEG) is widely used in cosmetics as a surfactant, detergent and emulsifier. During the manufacturing process, 1,4-dioxane, which is toxic to humans, can be produced as a by-product by dimerization of ethylene oxide. As consumers' interest in cosmetic ingredients has increased, the need for safe emulsion research without PEG ingredients in the personal care market has increased. With increasing consumer interest in cosmetic ingredients, the need for safer emulsion research without the PEG ingredient in the personal care market has increased. In this study, we aimed to develop and stabilize nanoemulsion formulation without PEG. Response Surface Methodology (RSM) was used to develop optimized nanoemulsion formulations. Surfactant content (2~4%), oil content (4~8%) and polyol content (12~24%) were set as independent variables as a result of preliminary experiments for determining independent variables and ranges. The particle size, zeta potential, turbidity, and polydispersity index of the formulation were measured as response variables. As a result of measurement of the prepared nanoemulsion by FIB (Focused ion beam), spherical particles were found to have a size distribution of 100 to 200 nm. The stability of each formulation was evaluated for 30 days at each temperature ($4^{\circ}C$, $25^{\circ}C$, and $45^{\circ}C$). The optimal formulation considering the optimum particle size, turbidity, polydispersity index and zeta potential was found to be surfactant (2%), oil (8%) and polyol (24%).