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China Surfactant Detergent & Cosmetics ›› 2015, Vol. 45 ›› Issue (1): 11-16.doi: 10.13218/j.cnki.csdc.2015.01.003

• Developmentandapplicatio • Previous Articles     Next Articles

Study on properties of self-thickening system composed of amphoteric surfactant and amino-acid based anionic surfactant

YUAN Min-jia1, DONG Chao1, SHEN Pei-lin1, LU Hai-wei2, WANG Jin-shuang2, FANG Bo2, GUO Yi-guang1   

  1. 1.Shanghai Jahwa United Company Ltd.,Shanghai 201702,China;
    2.Lab of Rheology, College of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China
  • Online:2015-01-22 Published:2019-04-01

Abstract: A viscoelastic micelle system (self-thickening system) blended with an amphoteric surfactant,cocamidopropyl betaine (CAPB),and an amino-acid based anionic surfactant,sodium lauroyl sarcosinate (LS),was formed by adjusting the mass ratio and pH.The network of wormlike micelles in the blend was confirmed via characterization with Cryo-TEM images.Effect of NaCl dosage on the viscosity of the self-thickening system was identified and the viscosity-temperature characteristics as well as the foaming performance of the viscoelastic system were emphatically investigated.Results showed that when the NaCl content is low (w<0.5%) its effect on viscosity of the system is rather small.Establishment of viscosity of the system is mainly affected by mass ratio and pH of the system.The viscosity decreases at higher temperature (40 ℃) and increases at lower temperature (5 ℃),respectively.The foaming performance becomes worse as pH declines.Adopting the methods of adjusting the mass ratio and the pH,a series of self-thickening systems formed by blending of anionic amino-acid based anionic surfactant and amphoteric surfactant can be obtained.

Key words: surfactant, blend, self-thickening, wormlike micelles, viscosity-temperature characteristics, foam performance

CLC Number: 

  • TQ423