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Effect of the alkyl chain length and concentration of the surfactant on Rheology properties of O/W emulsions stabilized with homologues series of glucopyranoside was studied. The Rheology properties in turn are being used to describe emulsion structure, emulsifying effect and emulsion stability. The emulsifying property was also explored through interfacial tension measurement. The homologues series of glucopyranoside possess identical polar head group structure, whereas the alkyl chain length varied from C₇ to C₁₀. The O/W emulsions were prepared by mixing 0.8 volume fractions of oil phase into a much smaller volume fraction of water phase; in this case 0.2 volume fractions of aqueous surfactant solution. Given energy input during emulsification and bulk surfactant concentration kept constant, the given oil to water mixing ratio would give high internal phase ratio concentrated O/W emulsions with …