Influence of surfactants on shear-thickening behavior in concentrated polymer dispersions

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• 作者：Fang Ye (1)
  Wei Zhu (1)
  Wanquan Jiang (1)
  Zhiyuan Wang (2)
  Qian Chen (2)
  Xinglong Gong (2)
  Shouhu Xuan (2)
  
• 关键词：Shear ; thickening ; Surfactant ; Styrenethylacrylate copolymer ; Viscosity
• 刊名：Journal of Nanoparticle Research
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：15
• 期：12
• 全文大小：
• 作者单位：Fang Ye (1)
  Wei Zhu (1)
  Wanquan Jiang (1)
  Zhiyuan Wang (2)
  Qian Chen (2)
  Xinglong Gong (2)
  Shouhu Xuan (2)
  
  1. Department of Chemistry, Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China (USTC), Hefei, 230026, People Republic of China
  2. CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, USTC, Hefei, 230027, People Republic of China
  
• ISSN：1572-896X

文摘

Concentrated dispersions consisting of 310nm poly(styrenethylacrylate) nanospheres and ethylene glycol, which exhibited pronounced shear-thickening behavior, were prepared in this work. The influence of surfactants on their shear-thickening behavior was investigated, which indicated that the surfactants affected the shear-thickening behavior by changing the surface force and interparticle force. Various surfactants, such as cationic, anionic, nonionic, and zwitterionic surfactants were added to the shear-thickening fluid (STF) and their rheological properties were measured. The results indicated that all kinds of surfactants could enhance shear-thickening behavior by changing their electrostatic, steric, or lubrication interaction, especially for nonionic surfactant Triton X-100 (TX100) and cationic surfactant cetyltrimethyl ammonium bromide (CTAB). TX100 led to the maximum viscosity up to 1,650Pas and CTAB enhanced the maximum viscosity up to 1,000Pas when the introduced surfactants were only 2 and 0.3%, both values were nearly five times larger than the neat STFs. A plausible explanation for the enhancing mechanism by different kinds of surfactants was discussed.