Association behaviour and rheology of palm based emulsion using mixed sugar based emulsifiers

Methyl glucose based emulsifiers such as Glucamate SSE-20 ( PEG-20 methyl glucose sesquistearate) and Glucate SS (methyl glucose sesquistearate) are widely used in the application of cosmetic products. The methyl glucoside products have excellent safety, mildness and effectiveness. Although thes...

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Main Author:	Ismail, Zahariah
Format:	Thesis
Language:	English English
Published:	2001
Subjects:	Emulsions. Sugar - Synthesis.
Online Access:	http://psasir.upm.edu.my/id/eprint/9228/1/FSAS_2001_14.pdf
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id	my-upm-ir.9228
record_format	uketd_dc
spelling	my-upm-ir.92282024-02-13T02:06:13Z Association behaviour and rheology of palm based emulsion using mixed sugar based emulsifiers 2001-12 Ismail, Zahariah Methyl glucose based emulsifiers such as Glucamate SSE-20 ( PEG-20 methyl glucose sesquistearate) and Glucate SS (methyl glucose sesquistearate) are widely used in the application of cosmetic products. The methyl glucoside products have excellent safety, mildness and effectiveness. Although these methyl glucosides are widely used as emulsifiers, little is known about their phase behaviour in binary and ternary systems. The phase behaviours in binary and ternary system have been studied at 80°c under visual observation by polarizing light and they were confirmed by polarization microscope. In the binary system, lamellar phases (La) were observed at the combination of 60/40, 70/30 and 80/20 of glucamate SSE-20 and glucate SS. It was identified as maltese crosses and oily streaks. When heated at 80°C, the oily streaks pattern of 70/30 took a longer time to change to isotropic phases if compared to the other ratios. This observation correlated well with yield val ue, viscosity, and thixotropy in the following order 70/30> 60/40>80/20. In the ternary system (mixed sugar based emulsifiers/water/medium chain triglycerides), the optical pattern indicated a combination of maltese crosses + oily streaks, maltese crosses and oily streaks texture alone. This system exhibited viscoelastic properties Equal ratio of medium chain triglycerides and water (1/1) were emulsified with 5% w/w of mixed non ionic sugar-based surfactants with various hydrophilic-lipophilic balance val ues (HLBs). The HLB numbers ranged from 6.6 to 15.0. The effect of H LB and with and without hydrocolloids on stability, particle size droplet and rheological properties of the resulting emulsions were studied. The presence of hydrocolloids in the emulsion system dramatically lowers the interfacial tension and thus increased interparticle attraction, weak van der Waals and increased steric repulsion to stabilize the system. The systems show increasing viscosity, yield value, critical stress and exhibit viscoelastic properties The ratio of bound water and bulk water in emulsion system is determined by thermogravimetry. Shifting the ratio of bound water and bulk water may result in regulated release of water, a principle that can be used to produce cream or lotion with controlled release of moisture Emulsions. Sugar - Synthesis. 2001-12 Thesis http://psasir.upm.edu.my/id/eprint/9228/ http://psasir.upm.edu.my/id/eprint/9228/1/FSAS_2001_14.pdf text en public doctoral Universiti Putra Malaysia Emulsions. Sugar - Synthesis. Faculty of Science and Environmental Studies Kassim, Anuar English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Kassim, Anuar
topic	Emulsions. Sugar - Synthesis.
spellingShingle	Emulsions. Sugar - Synthesis. Ismail, Zahariah Association behaviour and rheology of palm based emulsion using mixed sugar based emulsifiers
description	Methyl glucose based emulsifiers such as Glucamate SSE-20 ( PEG-20 methyl glucose sesquistearate) and Glucate SS (methyl glucose sesquistearate) are widely used in the application of cosmetic products. The methyl glucoside products have excellent safety, mildness and effectiveness. Although these methyl glucosides are widely used as emulsifiers, little is known about their phase behaviour in binary and ternary systems. The phase behaviours in binary and ternary system have been studied at 80°c under visual observation by polarizing light and they were confirmed by polarization microscope. In the binary system, lamellar phases (La) were observed at the combination of 60/40, 70/30 and 80/20 of glucamate SSE-20 and glucate SS. It was identified as maltese crosses and oily streaks. When heated at 80°C, the oily streaks pattern of 70/30 took a longer time to change to isotropic phases if compared to the other ratios. This observation correlated well with yield val ue, viscosity, and thixotropy in the following order 70/30> 60/40>80/20. In the ternary system (mixed sugar based emulsifiers/water/medium chain triglycerides), the optical pattern indicated a combination of maltese crosses + oily streaks, maltese crosses and oily streaks texture alone. This system exhibited viscoelastic properties Equal ratio of medium chain triglycerides and water (1/1) were emulsified with 5% w/w of mixed non ionic sugar-based surfactants with various hydrophilic-lipophilic balance val ues (HLBs). The HLB numbers ranged from 6.6 to 15.0. The effect of H LB and with and without hydrocolloids on stability, particle size droplet and rheological properties of the resulting emulsions were studied. The presence of hydrocolloids in the emulsion system dramatically lowers the interfacial tension and thus increased interparticle attraction, weak van der Waals and increased steric repulsion to stabilize the system. The systems show increasing viscosity, yield value, critical stress and exhibit viscoelastic properties The ratio of bound water and bulk water in emulsion system is determined by thermogravimetry. Shifting the ratio of bound water and bulk water may result in regulated release of water, a principle that can be used to produce cream or lotion with controlled release of moisture
format	Thesis
qualification_level	Doctorate
author	Ismail, Zahariah
author_facet	Ismail, Zahariah
author_sort	Ismail, Zahariah
title	Association behaviour and rheology of palm based emulsion using mixed sugar based emulsifiers
title_short	Association behaviour and rheology of palm based emulsion using mixed sugar based emulsifiers
title_full	Association behaviour and rheology of palm based emulsion using mixed sugar based emulsifiers
title_fullStr	Association behaviour and rheology of palm based emulsion using mixed sugar based emulsifiers
title_full_unstemmed	Association behaviour and rheology of palm based emulsion using mixed sugar based emulsifiers
title_sort	association behaviour and rheology of palm based emulsion using mixed sugar based emulsifiers
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Science and Environmental Studies
publishDate	2001
url	http://psasir.upm.edu.my/id/eprint/9228/1/FSAS_2001_14.pdf
_version_	1794018805974827008

Association behaviour and rheology of palm based emulsion using mixed sugar based emulsifiers

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