Abstract: Surface performance of alkyl ethoxy polyglycosides (AEG050) and the influences of different additives on them were examined.Results showed that:at 25 ℃,the value of critical micelle concentration (cmc) achieves 44.5 mg/L,and the surface tension at cmc (γ_cmc) achieves 29.4 mN/m.Besides,it displays rather strong capacity for resistance to hard water.With the increase of concentration of NaCl and/or Na₂SO₄,their surface activity increases.In monohydric alcohol solution of relatively lower concentration,the surface activity of AEG050 also strengthens,but when the monohydric alcohol concentration is relatively higher,their surface activity declines.There is a certain synergetic effect when AEG050 blends with other surfactants,especially cetyltrimethylammonium bromide (CTAB).In this case,cmc of blend composed of AEG050 and CTAB synergizes as 34.2% lower,while the surface tension γ_cmc decreases 4.1%.

Key words: alkyl ethoxy polyglycosides, additive, critical micelle concentration, surface tension, blend