Interfacial and Demulsifying Behavior of Novel Fluorinated Hyperbranched Polymers

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• 作者：Yifei Li (1) (2)
  Xi Wang (1)
  Huimin Zhang (1)
  Yan Wang (1)
  Yucai Yan (1)
  Yin Zhang (1)
  Yongxiang Zhao (1)
  
• 关键词：Demulsifying ; Hyperbranched ; Hexafluorobutyl acrylate ; Interfacial tension ; Dilational viscoelasticity
• 刊名：Journal of Surfactants and Detergents
• 出版年：2014
• 出版时间：September 2014
• 年：2014
• 卷：17
• 期：5
• 页码：977-984
• 全文大小：548 KB
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• 作者单位：Yifei Li (1) (2)
  Xi Wang (1)
  Huimin Zhang (1)
  Yan Wang (1)
  Yucai Yan (1)
  Yin Zhang (1)
  Yongxiang Zhao (1)
  
  1. College of Chemistry and Chemical Engineering, Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University, Taiyuan, 030006, Shanxi, China
  2. Institute of Environmental Science, Taiyuan University of Science and Technology, Taiyuan, 030024, Shanxi, China
  
• ISSN：1558-9293

文摘

In our previous study, a series of novel hyperbranched fluoropolymers with polyglycerol as the core and poly(hexafluorobutyl acrylate) as hydrophobic arms were synthesized. As potential demulsifier for lubricants, the demulsification behavior, dynamic interfacial tension, and dilational rheological properties of the fluorinated polymers were investigated in this paper. The influence of polymer concentration and molecular structure on the interfacial properties was analyzed. We conclude that the diffusion rate of the polymers and the viscoelastic properties of the water–oil interface are critical factors in determining the demulsification performance. The longer hydrophobic chains of the fluorinated polymers leads to a faster and more effective interfacial adsorption, which is favorable to improve demulsification efficiency. In contrast, the longer hydrophobic chain also enhances the elastic property of interface due to its entangled structure, which is unfavorable to demulsification. As a result, the polymer with medium hydrophobic chain length show the best demulsification performance.