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Experimental Verification of "Electrodynamic" Interaction

Research Project

Project/Area Number 12450386
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 高分子構造・物性(含繊維)
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

MATSUOKA Hideki  Asso. Prof., Polym. Chem., Kyoto Univ., 工学研究科, 助教授 (40165783)

Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥15,100,000 (Direct Cost: ¥15,100,000)
Fiscal Year 2002: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2001: ¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 2000: ¥7,300,000 (Direct Cost: ¥7,300,000)
KeywordsColloidal Crystal / Ultra-small-angle X-ray Scattering / Electrostatic Interaction / Counterion / Ion Atmosphere
Research Abstract

We have proposed "Electrodynamic Interaction" as a driving force of colloidal crystal formation. To clarify the mechanism of this novel force between ionic polymer particles, we have performed the systematic experiment by ultra-small-angle X-ray scattering (USAXS). The interparticle distance in the colloidal crystal was believed to decrease with increasing ionic strength. However, we found that it increased when added salt concentration is below 10^<-5>M. This fact means the effective interaction between colloidal particles should be an attractive one, which should based on difference mechanism from the theory already proposed, however. We thought that the counterions around particles have an important role for colloidal crystal formation. As the first experiment, we changed counterion species from proton to sodium ion. With exchanging from proton to sodium ion, the interpaticle distance changed. This fact certainly means that the interpaticle interaction is affected by counterion species. Secondaly, we used potassium, lithium, and tetramethylammonium (TMA) ions as counterions. The interparticle distance evaluated by USAXS again depended on the counterions species. These ions made the attractive interaction weaker than proton, and this effect is stronger in the order of potassium>sodium>TMA=lithium. This order is in good agreement in that for surface charge density of these cations, i.e. diffusion constant of counterions. Hence, we can conclude as following;
(1) "Electrodynamic Interaction" is effective when ionic strength is below 10^<-5>M.
(2) At this condition, the counterion atmosphere is highly overlapped.
(3) The counterions in atmosphere can move anywhere in the colloidal crystal.
(4) The interaction force depends on speed of counterion diffusion.
(5) The strong attractive interaction is observed only when counterion is proton. Hence, the origin of attraction should be anomalously high electric conductivity of protons.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] H.Matsuoka et al.: "The Structure of Colloidal Alloy Crystals revealed by Ultra-small-angle Neutron Scattering"Coll. Surf. A. 190(1). 17-24 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Matsuoka et al.: "Comparison of USAXS Information with RMSA Prediction for the Effect of Added Salt on the Colloidal Crystal Structure"J. Polym. Sci. Polym. Phys.. 39(1). 78-90 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Matsuoka et al.: "Ultra-small-angle X-ray and Neutron Scattering Studies of Colloidal Crystal"J. Appl. Cryst.. 33(3). 855-859 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Matsuoka et al.: "The Significant Information of Stability of Colloidal Crystal Revealed by Ultra-Small-Angle Synchrotron X-ray and Neutron Scattering"Coll. Surf. A. 174/1-2. 99-111 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Matsuoka et al.: "An Exact Evaluation of Salt Concentration Dependence of Interparticle Distance in Colloidal Crystals by Ultra-small-angle X-ray Scattering. IV -Effect of Counterion Species and the Possibility of New Factor for Colloidal Crystal Formation"Langmuir. 16(4). 1612-1619 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Matsuoka et al.: "USAXS and USANS Study of Colloidal Dispersions"Current Opinion in Colloid and Interface Science. (In press). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Matsuoka et al.: "The Structure of Colloidal Alloy Crystals revealed by Ultra-small-angle Neutron Scattering"Coll. Surf. A. 190(1). 17-24 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Matsuoka et al.: "Ultra-small-angle X-ray and Neutron Scattering Studies of Colloidal Crystal"J. Appl. Cryst.. 33(3). 855-859 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Matsuoka et al.: "Comparison of USAXS Information with RMSA Prediction for the Effect of Added Salt on the Colloidal Crystal Structure"J. Polym. Phys.. 39(1). 78-90 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Matsuoka et al.: "An Exact Evaluation of salt Concentration Dependence of Interparticle Distance in Colloidal Crystals by Ultra-small-angle X-ray Scattering.IV -Effect of Counterion Species and the Possibility of New Factor for Colloidal Crystal Formation"Langmuir. 16(4). 1612-1619 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Matsuoka et al.: "USAXS and USANS Study of Colloidal Dispersions"Current Opinion in Colloid and Interface Science. in press. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Matsuoka et al.: "The Structure of Colloidal Alloy Crystals revealed by Ultra-small-angle Neutron Scattering"Coll. Surf. A. 17-24 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.Matsuoka et al.: "Comparison of USAXS Information with RMSA Prediction for the Effect of Added Salt on the Colloidal Crystal Structure"J. Polym. Sci. Polym. Phys.,. 39(1). 78-90 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.Matsuoka et al.: "Ultra-small-angle X-ray and Neutron Scattering Studies of Colloidal Crystal"J. Appl. Cryst.. 33(3). 855-859 (2000)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.Matsuoka et al.: "The Significant Information of Stability of Colloidal Crystal Revealed by Ultra-Small-Angle Synchrotron X-ray and Neutron Scattering"Coll. Surf. A,. 174/1-2. 99-111 (2000)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.Matsuoka et al.: "The Mystery of Colloidal Crystal Formation --Novel Aspects obtained by Ultra-small-angle X-ray Scattering"Coll. Surf. A,. 174/1-2. 79-98 (2000)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.Matsuoka et al.: "An Exact Evaluation of Salt Concentration Dependence of Interparticle Distance in Colloidal Crystals by Ultra-small-angle X-ray Scattering IV -Effect of Counterion"Langmuir. 16(4). 1612-1619 (2000)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Harada, H.Matsuoka, T.Ikeda, H.Yamaoka: "Comparison of USAXS Information with RMSA Prediction for the Effect of Added Salt on the Colloidal Crystal Structure"J.Polym.Sci. Polym.Phys.. 39(1). 78-90 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Harada, H.Matsuoka, H.Yamaoka: "Collodial Crystal Alloy Structure of Binary Dispersions of Polystyrene and Poly (methylmethacrylate) Latices by Ultra-small-angle X-ray Scattering"Studies in Surface Science and Catalysis. 32. 289-292 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Harada, T.Yamamoto, H.Matsuoka, J.S.Lin, M.Agamalian, G.D.Wignall: "The Structure of Colloidal Alloy Crystals revealed by Ultra-small-angle Neutron Scattering"Coll.Surf.A. 190(1). 17-24 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Matsuoka et al.: "Colloidal Crystal Alloy Structure of Binary Dispersions of Polystyrene and Poly (methylmethacrylate) Latices by Ultra-small-angle X-ray Scattering."Studies in Surface Science and Catalysis. 132. 289-292 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Matsuoka et al.: "An Exact Evaluation of Salt Concentration Dependence of Interparticle Distance in Colloidal Crystals by Ultra-small-angle X-ray Scattering IV"Largmceir. 16(4). 1612-1619 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Matsuoka et al.: "The Significant Information of Stability of Colloidal Crystal Revealed by Ultra-Small-Angle Synchrotron X-ray and Neutron Scattering"Coll.Surf.A. 174(1-2). 99-111 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Matsuoka et al.: "The Mistery Colloidal Crystal Formation-Novel Aspects obtained by Ultra-small-angle X-ray Scattering."Coll.Surf.A. 174(1-2). 79-98 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Matsuoka et al.: "Ultra-small-angle X-ray and Neutron Scattering Studies of Colloidal Crystal."J.Appl.Cryst.. 33(3). 855-859 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Matsuoka et al.: "Comparison of USAXS Information with RMSA Prediction for the Effect of Added Salt on the Colloidal Crystal Structure."J.Polym.Sci.Polym.Phys.. 39(1). 78-90 (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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