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China Surfactant Detergent & Cosmetics ›› 2017, Vol. 47 ›› Issue (6): 301-306.doi: 10.13218/j.cnki.csdc.2017.06.001

• Basic research •     Next Articles

Study on rheological behaviors of pH-responsive wormlike micelles formed by an amine oxide surfactant

ZHANG Meng, QI Li-yun, LONG Yu, WANG Ji-yuan, QI Song-zhu, HUANG Yuan-lin, FANG Xue-jin   

  1. The Key Laboratory of Food Colloids and Biotechnology,Ministry of Education;School of Chemical and Material Engineering,Jiangnan University,Wuxi,Jiangsu 214122,China
  • Received:2017-02-24 Published:2019-03-20

Abstract: The aggregation behaviors of an amphoteric surfactant,α-carboxyl tridecyl dimethylamine oxide (CTAO) in aqueous solution at different pH values were examined by rheological method.Results show that wormlike micelles would form in CTAO aqueous solutions within concentration 55-125 mmol/L and pH value 6.0-6.7 at 25-60 ℃ without any additive.Their rheological behaviors comply with Maxwell model and the zero-shear viscosity can achieve 26.5 Pa·s.In case the pH value of the solution is higher than 7,form of the molecules of the surfactant in the solution changes and the repulsion between the molecules increases which results in the transition from wormlike micelles to spherical micelles.Meanwhile,the viscosity of the CTAO solution at pH value 7 is close to that of water and the zero-shear viscosity is about 1/4 000 of the solution with pH value 6.2.The pH-responsive micellar systems is obtained by a single-component surfactant CTAO,while displays distinct advantages of simple,narrow responsive pH value range,easy preparation and remarkable change of rheological properties.

Key words: α-carboxyl tridecyl dimethylamine oxide, wormlike micelles, rheological behavior, hydrogen bongding, pH-responsive

CLC Number: 

  • TQ423.3