Large deformation of self-oscillating polymer gel

Shingo Maeda, Terukazu Kato, Yuji Otsuka, Naoki Hosoya, Matteo Cianchetti, Cecilia Laschi

Research output: Research - peer-reviewArticle

Abstract

A self-oscillating gel is a system that generates an autonomous volume oscillation. This oscillation is powered by the chemical energy of the Belousov-Zhabotinsky (BZ) reaction, which demonstrates metal ion redox oscillation. A self-oscillating gel is composed of Poly-N-isopropylacrylamide (PNIPAAm) with a metal ion. In this study, we found that the displacement of the volume oscillation in a self-oscillating gel could be controlled by its being subjected to a prestraining process. We also revealed the driving mechanism of the self-oscillating gel from the point of view of thermodynamics. We observed that the polymer-solvent interaction parameter χ is altered by the redox changes to the metal ion incorporated in the self-oscillating gel. The prestraining process leads to changes in χ and changes in enthalpy and entropy when the self-oscillating gel is in a reduced and oxidized state. We found that nonprestrained gel samples oscillate in a poor solution (χ>0.5) and prestrained gel samples oscillate in a good solution (χ

LanguageEnglish
Article number010501
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume93
Issue number1
DOIs
StatePublished - 2016 Jan 5

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gels
polymers
oscillations
metal ions
prestressing
chemical energy
enthalpy
entropy
thermodynamics
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Statistics and Probability

Cite this

Large deformation of self-oscillating polymer gel. / Maeda, Shingo; Kato, Terukazu; Otsuka, Yuji; Hosoya, Naoki; Cianchetti, Matteo; Laschi, Cecilia.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 93, No. 1, 010501, 05.01.2016.

Research output: Research - peer-reviewArticle

Maeda, Shingo ; Kato, Terukazu ; Otsuka, Yuji ; Hosoya, Naoki ; Cianchetti, Matteo ; Laschi, Cecilia. / Large deformation of self-oscillating polymer gel. In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics. 2016 ; Vol. 93, No. 1.
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