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 E-mail:jiangbo@scu.edu.cn
  • Supported by:

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

Abstract:

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

MSC2000: 

  • O641