Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (07): 1751-1756.doi: 10.3866/PKU.WHXB201204233

• SOFT MATTER • Previous Articles     Next Articles

Synergism between Hydrophobically Modified Polyacrylic Acid and Wormlike Micelles

MEI Yong-Jun1,2, HAN Yi-Xiu2, ZHOU Hong2, YAO Lin1, JIANG Bo1   

  1. 1. College of Chemistry, Sichuan University, Chengdu 610065, P. R. China;
    2. The Second Research Institute of Civil Aviation Administration of China, Chengdu 610041, P. R. China
  • Received:2012-01-15 Revised:2012-04-23 Published:2012-06-07
  • Contact: JIANG Bo
  • Supported by:

    The project was supported by the National Natural Science Foundation of China and Civil Aviation Administration of China (60979020, 60939001).


The synergism between wormlike micelles formed from sodium oleate (NaOA) and hydrophobically modified polyacrylic acid (HMPA) was investigated according to their macroscopic performances and mesoscopic scales, using a combination of viscosity/rheology measurements and dissipative particle dynamics (DPD) molecular simulations. The rheology of NaOA wormlike micelles changed significantly following the addition of a small amount of HMPA, which verified the synergistic effect between them. A peak in the apparent viscosity was observed following an increase in the concentration of HMPA, suggesting that the synergistic effect was restricted by the composition of the mixture. A DPD simulation also confirmed that the solution composition had an influence on the root mean square (RMS) end-to-end distances of HMPA, with the observed value fluctuating according to NaOA and HMPA concentrations. The micellar morphology affected the RMS end-to-end distances of HMPA and the presence of NaOA micelles exerted a significant impact on the extension of HMPA at high HMPA concentrations. A proposed synergistic mechanism has been presented according to the experimental and simulation results.

Key words: Hydrophobically modified polyacrylic acid, Wormlike micelle, Rheology, Apparent viscosity, Dissipative particle dynamics molecular simulation, Root mean square end-to-end distance


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