Rheology properties of glucopyranoside stabilized oil–water emulsions: effect of alkyl chain length and bulk concentration of the surfactant

摘要: Abstract Effect of the alkyl chain length and concentration surfactant on Rheology properties O/W emulsions stabilized with homologues series glucopyranoside was studied. The in turn are being used to describe emulsion structure, emulsifying effect stability. property also explored through interfacial tension measurement. possess identical polar head group whereas varied from C7 C10. were prepared by mixing 0.8 volume fractions oil phase into a much smaller fraction water phase; this case 0.2 aqueous solution. Given energy input during emulsification bulk kept constant, given ratio would give high internal concentrated dispersed ≈0.8, average size droplets variation both concentration. droplet decreased increasing tail surfactant, so did free cmc. As expected these samples depended strongly phase. steady shear properties, such as viscosity, degree thinning σy enhanced decrease size. This implies that not only but its storage stability improved increase two factors. Likewise, oscillatory mode viscoelasticity fact G ′ ≫ ″ , it is evident elastic dominant over viscous property. elasticity decreasing ( ω ) at all measured ω, G′(ω2) function found be linear G″(ω) functions independent, indicating can adequately described Maxwell type viscoelastic model. Also, that, δ than 45° dominated their size, further implying