Stabilizing oil-in-water emulsions with yam bean (Pachyrhizus erosus L. urban) solids
Yam bean (Pachyrhizus erosus L. Urban) solids (YS) were used at concentrations of 3, 5 and 7 % w/w for stabilizing oil-in-water emulsions with a 0.15 mass fraction (E3, E5 and E7). Higher YS concentrations produced emulsions with smaller average particle size distribution, more marked shear thinning behaviour, and higher solid-like (tan δ < 1) viscoelastic properties. Optical micrographs revealed that the rheological properties, particle size distribution, and stability of the emulsions were predominantly associated to the formation of 3-D particles network in the continuous phase that immobilized the emulsion droplets. The micrographs also showed small sized YS fragments adsorbed at the oil-water interface, contributing with a steric stabilization term to emulsions stability. Variations in the rheological properties of the emulsions with aging time (14 days) were less pronounced when using higher YS concentrations.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
Universidad Autónoma Metropolitana, División de Ciencias Básicas e Ingeniería
2014
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| Online Access: | http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1665-27382014000200010 |
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