Association Behaviour and Physicochemical Properties of Dihydroxystearic Acid and Octyl Dihydroxystearate, and Their Applications in Cosmetics

The phase behaviour in ternary system had been studied at 85°C under visual observation by polarizing light and they were confirmed by polarization microscope. It was found spherulite and needles type of crystal for DHSA and Octyl dihydroxystearate respectively. The polymorphs were typically disting...

Full description

Saved in:

Bibliographic Details
Main Author:	Mohamed Sopian, Marisol Hainny
Format:	Thesis
Language:	English English
Published:	2006
Subjects:	Ternary system. Polarization (Light).
Online Access:	http://psasir.upm.edu.my/id/eprint/535/1/600383_fs_2006_18_abstrak_je__dh_pdf_.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.535
record_format	uketd_dc
spelling	my-upm-ir.5352013-05-27T06:49:04Z Association Behaviour and Physicochemical Properties of Dihydroxystearic Acid and Octyl Dihydroxystearate, and Their Applications in Cosmetics 2006-06 Mohamed Sopian, Marisol Hainny The phase behaviour in ternary system had been studied at 85°C under visual observation by polarizing light and they were confirmed by polarization microscope. It was found spherulite and needles type of crystal for DHSA and Octyl dihydroxystearate respectively. The polymorphs were typically distinguished by differences in their X-ray spectra using X-ray diffraction spectroscopy. Polymorph DHSA and Octyl dihydroxystearate in MCT exist as beta prime (β’) and beta (β). The results also showed that mixture of DHSA/ Octyl dihydroxystearate in different type of third component (MCT and ethanol) may posses only stable β’ form, only stable β form or both β and β’ form. A rheological analysis showed the deformation and flow behaviour of DHSA / Octyl dihydroxystearate and MCT respectively. From hysteresis value, the correlation between the crystal polymorph and decreasing of ratio DHSA plays an important role with the structure breakdown. Instability of polymorph gave vary and unpredictable viscosity value to the mixture of DHSA and Octyl dihydroxystearate. Study of frequency sweep gave idea viscoelastic properties of DHSA and Octyl dihydroxystearate in MCT. Most samples gave result of storage modulus was always higher than the loss modulus (G’>G”). Loss modulus higher than storage modulus (G”>G’) for 30:70 of DHSA/ Octyl dihydoxystearate at 85% MCT. Their needle and spherulite microstructures, which confer a brittle or smooth feel, were useful in the formulation of concealer stick. The concealer sticks were prepared by adding DHSA, Octyl dihydroxystearate, and MCT as main components combined with fillers, pigment, binders and fragrance. The concealer stick with different ratios of DHSA and Octyl dihydroxystearate gave different results in its stability. The stability test included breaking point, heat test, hardness test, slip melting point, softening point and humidity. Formulation at 20:80 DHSA/ Octyl dihydroxystearate was chosen as the best formulation due to the physical properties previously which consist of β polymorph densely packed spherulite crystal. When compared to commercial, this formulation showed a better result in terms of softness and strength effect of the sticks. Ternary system. Polarization (Light). 2006-06 Thesis http://psasir.upm.edu.my/id/eprint/535/ http://psasir.upm.edu.my/id/eprint/535/1/600383_fs_2006_18_abstrak_je__dh_pdf_.pdf application/pdf en public masters Universiti Putra Malaysia Ternary system. Polarization (Light). Faculty of Science English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Ternary system. Polarization (Light).
spellingShingle	Ternary system. Polarization (Light). Mohamed Sopian, Marisol Hainny Association Behaviour and Physicochemical Properties of Dihydroxystearic Acid and Octyl Dihydroxystearate, and Their Applications in Cosmetics
description	The phase behaviour in ternary system had been studied at 85°C under visual observation by polarizing light and they were confirmed by polarization microscope. It was found spherulite and needles type of crystal for DHSA and Octyl dihydroxystearate respectively. The polymorphs were typically distinguished by differences in their X-ray spectra using X-ray diffraction spectroscopy. Polymorph DHSA and Octyl dihydroxystearate in MCT exist as beta prime (β’) and beta (β). The results also showed that mixture of DHSA/ Octyl dihydroxystearate in different type of third component (MCT and ethanol) may posses only stable β’ form, only stable β form or both β and β’ form. A rheological analysis showed the deformation and flow behaviour of DHSA / Octyl dihydroxystearate and MCT respectively. From hysteresis value, the correlation between the crystal polymorph and decreasing of ratio DHSA plays an important role with the structure breakdown. Instability of polymorph gave vary and unpredictable viscosity value to the mixture of DHSA and Octyl dihydroxystearate. Study of frequency sweep gave idea viscoelastic properties of DHSA and Octyl dihydroxystearate in MCT. Most samples gave result of storage modulus was always higher than the loss modulus (G’>G”). Loss modulus higher than storage modulus (G”>G’) for 30:70 of DHSA/ Octyl dihydoxystearate at 85% MCT. Their needle and spherulite microstructures, which confer a brittle or smooth feel, were useful in the formulation of concealer stick. The concealer sticks were prepared by adding DHSA, Octyl dihydroxystearate, and MCT as main components combined with fillers, pigment, binders and fragrance. The concealer stick with different ratios of DHSA and Octyl dihydroxystearate gave different results in its stability. The stability test included breaking point, heat test, hardness test, slip melting point, softening point and humidity. Formulation at 20:80 DHSA/ Octyl dihydroxystearate was chosen as the best formulation due to the physical properties previously which consist of β polymorph densely packed spherulite crystal. When compared to commercial, this formulation showed a better result in terms of softness and strength effect of the sticks.
format	Thesis
qualification_level	Master's degree
author	Mohamed Sopian, Marisol Hainny
author_facet	Mohamed Sopian, Marisol Hainny
author_sort	Mohamed Sopian, Marisol Hainny
title	Association Behaviour and Physicochemical Properties of Dihydroxystearic Acid and Octyl Dihydroxystearate, and Their Applications in Cosmetics
title_short	Association Behaviour and Physicochemical Properties of Dihydroxystearic Acid and Octyl Dihydroxystearate, and Their Applications in Cosmetics
title_full	Association Behaviour and Physicochemical Properties of Dihydroxystearic Acid and Octyl Dihydroxystearate, and Their Applications in Cosmetics
title_fullStr	Association Behaviour and Physicochemical Properties of Dihydroxystearic Acid and Octyl Dihydroxystearate, and Their Applications in Cosmetics
title_full_unstemmed	Association Behaviour and Physicochemical Properties of Dihydroxystearic Acid and Octyl Dihydroxystearate, and Their Applications in Cosmetics
title_sort	association behaviour and physicochemical properties of dihydroxystearic acid and octyl dihydroxystearate, and their applications in cosmetics
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Science
publishDate	2006
url	http://psasir.upm.edu.my/id/eprint/535/1/600383_fs_2006_18_abstrak_je__dh_pdf_.pdf
_version_	1747810243071442944

Association Behaviour and Physicochemical Properties of Dihydroxystearic Acid and Octyl Dihydroxystearate, and Their Applications in Cosmetics

Similar Items