Volume oscillation of microphase-separated gel

Shingo Maeda, Shuji Hashimoto

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In this study, The volume oscillation of the microphase-separated, self-oscillating gel above the volume phase transition temperature is discussed. The self-oscillating gel is composed of N-isopropylacrylamide (NIPAAm) with a metal catalyst for the Belousov-Zhabotinsky (BZ) reaction, which is known as the oscillating reaction. The influence of temperature on the period and the self-oscillating behavior is clarified. The volume change of the gel is explained by a change of the Flory-Huggins interaction parameter, χ, which is induced by the hydration and dehydration of the polymer chain due to a valance change of the metal catalyst (Ru(bpy)32+ ↔ Ru(bpy)33+) below the volume phase-transition temperature. In contrast, the volume change of the gel is explained by a change of the Donnan osmotic pressure. The volume oscillation of a microphaseseparated gel above the volume phase transition temperature is discussed. The oscillating motion is produced by the dissipating chemical energy of the oscillating reaction, that is, the Belouzov-Zhabotinsky (BZ) reaction occuring inside the gel. Although the gel is completely composed of synthetic polymer, it shows a self-oscillation as if it is alive.

Original languageEnglish
Pages (from-to)343-349
Number of pages7
JournalMacromolecular Chemistry and Physics
Volume214
Issue number3
DOIs
Publication statusPublished - 2013 Feb 12

Fingerprint

Gels
gels
oscillations
Superconducting transition temperature
Phase transitions
transition temperature
Polymers
Metals
catalysts
self oscillation
chemical energy
Catalysts
osmosis
polymers
Dehydration
dehydration
Hydration
metals
hydration
interactions

Keywords

  • biomimetics
  • crosslinking
  • gels
  • phase separation
  • stimuli-sensitive polymers

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Physical and Theoretical Chemistry
  • Condensed Matter Physics

Cite this

Volume oscillation of microphase-separated gel. / Maeda, Shingo; Hashimoto, Shuji.

In: Macromolecular Chemistry and Physics, Vol. 214, No. 3, 12.02.2013, p. 343-349.

Research output: Contribution to journalArticle

Maeda, Shingo ; Hashimoto, Shuji. / Volume oscillation of microphase-separated gel. In: Macromolecular Chemistry and Physics. 2013 ; Vol. 214, No. 3. pp. 343-349.
@article{04d326763fc7438395d9eb24ab897145,
title = "Volume oscillation of microphase-separated gel",
abstract = "In this study, The volume oscillation of the microphase-separated, self-oscillating gel above the volume phase transition temperature is discussed. The self-oscillating gel is composed of N-isopropylacrylamide (NIPAAm) with a metal catalyst for the Belousov-Zhabotinsky (BZ) reaction, which is known as the oscillating reaction. The influence of temperature on the period and the self-oscillating behavior is clarified. The volume change of the gel is explained by a change of the Flory-Huggins interaction parameter, χ, which is induced by the hydration and dehydration of the polymer chain due to a valance change of the metal catalyst (Ru(bpy)32+ ↔ Ru(bpy)33+) below the volume phase-transition temperature. In contrast, the volume change of the gel is explained by a change of the Donnan osmotic pressure. The volume oscillation of a microphaseseparated gel above the volume phase transition temperature is discussed. The oscillating motion is produced by the dissipating chemical energy of the oscillating reaction, that is, the Belouzov-Zhabotinsky (BZ) reaction occuring inside the gel. Although the gel is completely composed of synthetic polymer, it shows a self-oscillation as if it is alive.",
keywords = "biomimetics, crosslinking, gels, phase separation, stimuli-sensitive polymers",
author = "Shingo Maeda and Shuji Hashimoto",
year = "2013",
month = "2",
day = "12",
doi = "10.1002/macp.201200448",
language = "English",
volume = "214",
pages = "343--349",
journal = "Macromolecular Chemistry and Physics",
issn = "1022-1352",
publisher = "Wiley-VCH Verlag",
number = "3",

}

TY - JOUR

T1 - Volume oscillation of microphase-separated gel

AU - Maeda, Shingo

AU - Hashimoto, Shuji

PY - 2013/2/12

Y1 - 2013/2/12

N2 - In this study, The volume oscillation of the microphase-separated, self-oscillating gel above the volume phase transition temperature is discussed. The self-oscillating gel is composed of N-isopropylacrylamide (NIPAAm) with a metal catalyst for the Belousov-Zhabotinsky (BZ) reaction, which is known as the oscillating reaction. The influence of temperature on the period and the self-oscillating behavior is clarified. The volume change of the gel is explained by a change of the Flory-Huggins interaction parameter, χ, which is induced by the hydration and dehydration of the polymer chain due to a valance change of the metal catalyst (Ru(bpy)32+ ↔ Ru(bpy)33+) below the volume phase-transition temperature. In contrast, the volume change of the gel is explained by a change of the Donnan osmotic pressure. The volume oscillation of a microphaseseparated gel above the volume phase transition temperature is discussed. The oscillating motion is produced by the dissipating chemical energy of the oscillating reaction, that is, the Belouzov-Zhabotinsky (BZ) reaction occuring inside the gel. Although the gel is completely composed of synthetic polymer, it shows a self-oscillation as if it is alive.

AB - In this study, The volume oscillation of the microphase-separated, self-oscillating gel above the volume phase transition temperature is discussed. The self-oscillating gel is composed of N-isopropylacrylamide (NIPAAm) with a metal catalyst for the Belousov-Zhabotinsky (BZ) reaction, which is known as the oscillating reaction. The influence of temperature on the period and the self-oscillating behavior is clarified. The volume change of the gel is explained by a change of the Flory-Huggins interaction parameter, χ, which is induced by the hydration and dehydration of the polymer chain due to a valance change of the metal catalyst (Ru(bpy)32+ ↔ Ru(bpy)33+) below the volume phase-transition temperature. In contrast, the volume change of the gel is explained by a change of the Donnan osmotic pressure. The volume oscillation of a microphaseseparated gel above the volume phase transition temperature is discussed. The oscillating motion is produced by the dissipating chemical energy of the oscillating reaction, that is, the Belouzov-Zhabotinsky (BZ) reaction occuring inside the gel. Although the gel is completely composed of synthetic polymer, it shows a self-oscillation as if it is alive.

KW - biomimetics

KW - crosslinking

KW - gels

KW - phase separation

KW - stimuli-sensitive polymers

UR - http://www.scopus.com/inward/record.url?scp=84873449584&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84873449584&partnerID=8YFLogxK

U2 - 10.1002/macp.201200448

DO - 10.1002/macp.201200448

M3 - Article

VL - 214

SP - 343

EP - 349

JO - Macromolecular Chemistry and Physics

JF - Macromolecular Chemistry and Physics

SN - 1022-1352

IS - 3

ER -