Abstract: Performance of blend systems composed of anionic surfactant alkyl hydroxypropyl polyglucoside sulfonates (APGHPS) and amphoteric surfactant imidazoline (IMD) such as stability,surface activity,foam performance,wetting power,and hard water endurance were investigated.It was found that the blend system of APGHPS and IMD has a good compatibility and a strong synergic effect.When the molar ratio between APGHPS and IMD is 1∶1,the blend system shows the strongest synergic effect.The minimum value of critical micelle concentration (cmc) and the surface tension at cmc (γ_cmc) of the blend system is 8.81×10^-5 mol/L and 26.2 mN/m respectively,which is much lower than that of each single component in the blend system.The foam performance,wetting power and hard water endurance are also better than that of each single component in the blend system.

Key words: alkyl hydroxypropyl polyglucoside sulfonates, imidazoline, blend system, performance