Rheology of palm olein emulsions stabilized by non-ionic surfactants as potential carriers for drug delivery

• Main Authors: Ahmad, Kausar, Mohd Nawi, Mohamed Sufian
• Format: Conference or Workshop Item
• Language: English
• Published: 2006
• Subjects: QD Chemistry; RS Pharmacy and materia medica
• Online Access: http://irep.iium.edu.my/44979/1/Seminar_SSTSS20016_RheologyofPalm_OleinEmulsions_kausar20151006.pdf; http://irep.iium.edu.my/44979/

Palm olein emulsions were prepared by homogenising the oil with varied ratios of sorbitan monolaurate (Span 20®) and polyoxyethylene 20 sorbitan monolaurate (Tween 20®). Viscosity changes of these emulsions with and without Tragacanth gum, were measured. The viscosity of emulsions increased drastically with increasing ratios of Span 20/Tween 20, and decreased with increasing shear rate, indicating shear thinning. As the ratio of Span 20/Tween 20 increased to 1: 0.4 ratio, a small amount of hysteresis was observed. Significant thixotropic behaviour was noted with the addition of 0.01% Tragacanth gum into the oil emulsion.