Application properties of a polymeric surfactant in different detergents
The molecular weight,surface tension,and the particle size distribution of micellar aggregates of a polyether-polyacrylate polymeric surfactant,HS-PA,were characterized on gel permeation chromatograph,surface tension meter,and laser particle size analyzer,respectively.The thickening properties,detergency,liquid crystal morphology,suspension properties,and rheological behaviors of HS-PA in unstructured/structured detergents with LAS/AES/AEO9 as the main surfactants,respectively,were also investigated.The characterization results showed that,the weight-average molecular weight of HS-PA was 4 244,the critical micelle concentration was 3×10-7 mol/L,and the equilibrium surface tension was 42.06 mN/m;the average particle size of aggregates was increased when LAS,AES and AEO9 formed mixed micelles with HS-PA,respectively.The application test in unstructured detergents showed that,HS-PA had viscosity-enhancing effects on all the LAS/AES/AEO9-based systems,and meanwhile it was beneficial to the improvement of the detergency to sebum.The application test in structured detergents showed that,HS-PA would help the formation of lamellar liquid crystals in the LAS/AES/AEO9 systems,and the more HS-PA used,the more the liquid crystals in the AES system;the centrifugal separation results showed that the structured detergents containing HS-PA had the ability to stabilize the suspension of microcapsules;HS-PA could increase the yield stress of the LAS formulation system as determined by rotational rheometer.
万方数据
维普
