• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Self-organization in Polymer Gel Systems Incorporated with Active Elements

Research Project

Project/Area Number 10640376
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 物性一般(含基礎論)
Research InstitutionFukuoka University

Principal Investigator

MIYAKAWA Kenji  Fuculty of Science, Fukuoka University, Professor, 理学部, 教授 (30037296)

Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2000: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥2,600,000 (Direct Cost: ¥2,600,000)
Keywordsself-organization / non-equilibrium / Belousov-Zhabotinsky reaction / self-oscillating gel / 自己組織化 / ゲル / BZ対応 / BZ 反応
Research Abstract

The poly (N-isopropyl acrylamide)(PNIPA) gel coupled with Belousov-Zhabotinsky (BZ) reaction was prepared by covalently bonding the catalyst ruthenium (Ru(bpy)_3) to the polymer chain. The chemical oscillation in the BZ reaction is found to induce periodical and autonomous swelling-shrinking volume changes of the gel. In this new type of gel, conversely a volume change of the PNIPA gel affects the propagation of the chemical wave. Our attention was focused on effects of mechanical changes on the chemical wave by utilizing the thermally driven volume phase transition of the PNIPA gel. Both the velocity and the frequency of the chemical wave increased with increasing the temperature, and abruptly decreased at the volume transition temperature of the gel. The diffusion of HBr0_2, which is essential for the wave propagation, was hindered with increasing the temperature. The diffusion of HBrO_2 through the gel network in the low temperature region was explained in the same way as a simple diffusion of inactive molecules through a restricted environment. At the high temperature, in contrast, the change of the wave velocity cannot be explained by the simple diffusion theory. This is probably because non-homogeneities in reactant concentrations and the increase in the amount of bulky catalyst hinder the diffusion and the rate of reaction.
Depending on the ratio of concentration of the reducing agent to that of the oxidizing agent, reduction waves appears in contrast to usual oxidizing waves. The most striking behaviors observed are self-replication and preservation of reduction pulse waves. In the former dynamics, after the propagating reduction pulse wave vanishes, it splits into two counterpropagating pulses. In the latter dynamics, counterpropagating reduction pulse waves annihilate each other upon head-on collision and then reappear.

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] K.Miyakawa: "Responses of an immobilized-catalyst Belousov-Zabotinskii reaction system to AC electric field"J.Chem.Phys.. 109. 7462-7467 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Watanabe: "Coacervation of Elastomeric Polypeptides : Microscopic Observations and Light Scattering Measurements"Peptide Science. 1998. 477-480 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Kaibara: "Coacervation and Self-Assembly of Polypeptid Derived from Elastin Effects of Metal Cations"Kluwer Academic Publishers. 772-774 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Miyakawa: "Entrainment in coupled salt-water oscillators"Physica D. 127. 177-186 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Kaibara: "Liquid-Liquid Phase Separation of Elastomeric Protein-Water System-Microscopic Observations and Light Scattering Measurements-"Biopolymers. 53. 369-379 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Miyakawa: "Chemical waves in self-oscillating gels"Pys.Rev.E. 62. 793-798 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] F.Sakamoto: "Self-Replication and Preservation of Reduction Waves in the Belousov-Zhabotinsky Reaction"J.Phys.Soc.Jpn.. 69. 2775-2778 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Miyakawa: "Synchronization and clustering in globally coupled salt-water oscillators"Physica D. (in press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Miyakawa and M.Mizoguchi: "Responses of an immobilized-catalyst Belousov-Zabotinskii reaction system to AC electric field."J.Chem.Phys. 109. 7462-7467 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Watanabe, K.Kaibara, K.Miyakawa, K.Okamoto, and M.Kondo: "Coacervation and Self-Assembly of Polypeptid Derived from Elastin : Effects of Metal Cations."Peptide Science 1998. 477-480 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Miyakawa and K.Yamada: "Entrainment in coupled salt-water oscillators."Physica D. 127. 177-186 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Kaibara, T.Watanabe and K.Miyakawa: "Liquid-Liquid Phase Separation of Elastomeric Protein-Water System-Microscopic Observations and Light Scattering Measurements-."Biopolymers. 53. 369-379 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Miyakawa, F.Sakamoto, R.Yoshida, E.Kokufuta and T.Yamaguchi: "Chemical waves in self-oscillating gels."Phys.Rev.E. 62. 793-798 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] F.Sakamoto and K.Miyakawa: "Self-Replication and Preservation of Reduction Waves in the Belousov-Zhabotinsky Reaction."J.Phys.Soc.Jpn. 69. 2775-2778 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Miyakawa and K.Yamada: "Synchronization and clustering in globally coupled salt-water oscillators."Physica D. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Kaibara, T.Watanabe, K.Miyakawa, M.Kondo, and K.Okamoto: "Coacervation of Elestomeric Polypeptides : Microscopic Observations and Light Scattering Measurements."Kluwer Academic Publishers. 772-774 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kozue Kaibara: "Liquid-Liquid Phase Separation of Elastomeric Protein-Water System-Microscopic Observations and Light Scattering Measurements-"Biopolymers. 53. 369-379 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kenji Miyakawa: "Chemical waves in self-oscillating gels"Phys.Rev.E. 62. 793-798 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Fumitaka Sakamoto: "Self-Replication and Preservation of Reduction Waves in the Belousov-Zhabotinsky Reaction"J.Phys.Soc.Jpn.. 69. 2775-2778 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kenji Miyakawa: "Synchronization and clustering in globally coupled salt-water oscillators"Physica D. (印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kenji Miyakawa: "Entrainment in coupled salt-water oscillators"Physica D. 127. 177-186 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Tohru Watanabe: "Coacervation and Self-Assembly of Polypeptid Derived from Elastin:Effects of Metal Cations"Peptide Science. 1998. 447-480 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kozue Kaibara: "Liquid-Liquid Phase Separation of Elastomeric Protein-Water System-Microscopic Observations and Light Scattering Measurements-"Biopolymers. (発表予定). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kenji Miyakawa: "Responses of an immobilized-catalyst Belousov-Zabotinskii reaction system to AC electric field" J.Chem.Phys. 109. 7462-7467 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kenji Miyakawa: "Entrainment in coupled salt-water oscillators" Physica D. (発表予定). (1999)

    • Related Report
      1998 Annual Research Report

URL: 

Published: 1998-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi