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Open Access Publications from the University of California

Stabilizing Liquids Using Interfacial Supramolecular Polymerization.

  • Author(s): Gu, Pei-Yang
  • Chai, Yu
  • Hou, Honghao
  • Xie, Ganhua
  • Jiang, Yufeng
  • Xu, Qing-Feng
  • Liu, Feng
  • Ashby, Paul D
  • Lu, Jian-Mei
  • Russell, Thomas P
  • et al.
Abstract

The strong electrostatic interactions at the oil-water interface between a small molecule, 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin, H6 TPPS, dissolved in water, and an amine terminated hydrophobic polymer dissolved in oil are shown to produce a supramolecular polymer surfactant (SPS) of H6 TPPS at the interface with a binding energy that is sufficiently strong to allow an intermolecular aggregation of the supramolecular polymers. SPSs at the oil-water interface are confirmed by in situ real-space atomic force microcopy imaging. The assemblies of these aggregates can jam at the interface, opening a novel route to kinetically trap the liquids in non-equilibrium shapes. The elastic film, comprised of SPSs, wrinkles upon compression, providing a strategy to stabilize liquids in non-equilibrium shapes.

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