화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.97, 173-179, May, 2021
DOI10.1016/j.jiec.2021.02.015  Export Citation
Nanosheets of copolymerized ionic liquid-based polyelectrolyte complexes regulated at oil.water interface and their emulsification capability
He Zhang, Jun Bo Zhang, Qing Bo Meng†, Wei Guo, Ming Yang1, Shuyao Wu, Qiong Wu2, Daliang Liu2, †, and Xi-Ming Song†
  • Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang, 110036, PR China
  • 1Key Laboratory of Colloids, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, PR China
  • 2Instrumental Analysis Center, College of Chemistry, Liaoning University, Shenyang, 110036, PR China
E-mail:, ,
The emulsification by polyelectrolyte complexes is easy to handle, and could be considered as an effective strategy for introducing functional materials to liquid.liquid interfaces, but the related studies are still insufficient. Herein, a kind of copolymerized ionic liquid (PIL-co-PVIm) which is synthesized from 1- vinyl-3-ethylimidazolium bromide and 1-vinylimidazole, are used as polycation to form polyelectrolyte complexes type Pickering emulsifiers with sodium alginate, poly(sodium 4-styrenesulfonate) and poly (acrylic acid) sodium salt respectively as polyanion. For toluene-water emulsion systems and hydrophobic ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIm]PF6)-water system, the polyelectrolyte complexes formed by PIL-co-PVIm and sodium alginate or poly (sodium 4-styrenesulfonate) showed best emulsification capability. The emulsions stabilized by the polyelectro- lyte complexes at stoichiometric ratio are relatively less stable compared to non-stoichiometric complexes, while PIL-co-PVIm without complexation has no emulsification capability. The polyelectro- lyte complexes based on homopolymerized PIL give an unsatisfied emulsification capability, while the emulsification performance could be remarkably improved by copolymerizing ionic liquids with the uncharged comonomer, but excessive contents of the uncharged unit make the polyelectrolyte complexes less interface active. The sheet-like PECs are formed in aqueous dispersions, and their thickness is remarkably reduced at oil.water interface after emulsification, approximately ranging from 200 nm to 10 nm by manipulating the polyanion.
Keywords:Polyelectrolyte;Copolymer;Complex;Ionic liquid;Pickering emulsions
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