Composition-dependent sol-gel transition of amphiphilic blend of PEG with hydrophobic gallamide components

Akihiro Aso, Kazutaka Taki, Tomoki Maeda, Kazunori Toma, Hitoshi Tamiaki, Atsushi Hotta

Research output: Contribution to journalArticle

Abstract

Two types of poly(ethylene glycol) (PEG)-based amphiphiles were synthesized: a diblock-type amphiphile (PEG1) with a hydrophobic moiety on one terminal of PEG (PEG with the molecular weight of 2000), and a triblock-type amphiphile (PEG2) with hydrophobic moieties on both terminals of PEG. The hydrophobic moiety consisted of hydrophobic C14 alkyl tails covalently linked through a gallamide component. The sol-gel transitions of the aqueous solution of PEG1 and PEG2 were studied. At the PEG amphiphile concentration of 15 wt %, PEG1 gave a clear solution over a wide temperature range from 20 to 80°C, while PEG2 was partially soluble in water. However, the aqueous blend solution of PEG1 and PEG2 exhibited a hydrogel depending on the blend ratio and temperature. It was considered that the composition of PEG1 and PEG2 governed the sol-gel transition, and that the dynamic moduli could be effectively controlled by changing the mixing ratios of the PEG amphiphiles.

Original languageEnglish
JournalJournal of Applied Polymer Science
DOIs
Publication statusAccepted/In press - 2017

Keywords

  • Copolymers
  • Gels
  • Micelles
  • Stimuli-sensitive polymers
  • Viscosity and viscoelasticity

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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