Abstract: The blend system composed of alkyl polyglucoside (APG0810) and zwitterionic surfactant octyl imidazoline was prepared.Its surface activity,foaming performance,wetting power and emulsifying performance were investigated.The results showed that the blend system of APG0810 and octyl imidazoline displays a good synergistic effect.When the mass ratio between APG0810 and octyl imidazoline is 5∶1,the synergistic effect is the best.And in that condition,the value of the critical micelle concentration is 577.53 mg/L and the minimum value of γ_cmc is 28.20 mN/m.The wetting power and emulsifying performance are also improved,and when the mass ratio between APG0810 and octyl imidazoline is 5∶1,the effects achieve the best.

Key words: alkyl polyglucoside, octyl imidazoline, blend system, synergistic effect