Phase Diagram of Glycerol Monostearate and Sodium Stearoyl Lactylate

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• 作者：Fan C. Wang ; Fernanda Peyronel ; Alejandro G. Marangoni
• 刊名：Crystal Growth & Design
• 出版年：2016
• 出版时间：January 6, 2016
• 年：2016
• 卷：16
• 期：1
• 页码：297-306
• 全文大小：716K
• ISSN：1528-7505

文摘

The phase behavior of two solid emulsifiers glycerol monostearate (GMS) and sodium stearoyl lactylate (SSL) was examined using differential scanning calorimetry (DSC), small and wide-angle X-ray scattering (SAXS and WAXS), and ultra small angle X-ray scattering (USAXS). The phase behavior of GMS–SSL in water (gelled aqueous dispersions) was also examined. For the nonaqueous systems, GMS and SSL were immiscible in the range of 20–80% and exhibited phase separation. On the other hand, systems with higher than 80% GMS or higher than 80% SSL were miscible and remained mixed after 4 weeks. Increasing the amount of SSL in GMS–SSL mixtures caused a reduction in the transition temperature of the sub-α phase and the melting temperature of GMS. Furthermore, adding up to 20% SSL to GMS slowed down the polymorphic transition of GMS from the α phase to the ? phase. Examination of the stability and polymorphic behavior of gelled aqueous dispersions of GMS–SSL mixtures revealed similar structural and thermal properties to their corresponding neat systems.