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1996 Fiscal Year Final Research Report Summary

Functionalization of Carbonaceous Mesophase Spherules

Research Project

Project/Area Number 07650936
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 触媒・化学プロセス
Research InstitutionJapan Advanced Institute of Science and Technology

Principal Investigator

MIYAKE Mikio  JAIST,School of Materials Science, Professor, 材料科学研究科, 教授 (80112019)

Co-Investigator(Kenkyū-buntansha) TERANISHI Toshiharu  JAIST,School of Materials Science, Reaearch Associate, 材料科学研究科, 助手 (50262598)
Project Period (FY) 1995 – 1996
KeywordsCarbonaceous Materials / Mesophase Spherules / Surface Modification / Alkylation / Silica Coverage / Carbon Black / Electroless Metal Plating / Silylation
Research Abstract

The purpose of the research was to develop functional materials based on carbon particles. Following results are obtained by surface modification of carbonaceous mesophase spherules (spherules) as well as carbon blacks (CB), which expose aromatic edges and hexagonal planes to the surface, respectively :
1. Surface modification of spherules by the introduction of functional groups
(1) Samples after introduction of acidic functional groups by oxidation were subjected to silylation reaction by using RSiCl_3. Original spherules and ones after oxidation were hydrophobic and hydrophilic, respectively. They turned to hydrophobic again after the reaction with RSiCl_3, suggesting introduction of RSi group to the spherule surface. Number of RSi groups introduced estimated by TGA was 10^<18>/m^2. On the other hand, CB sustained hydrophilic even after the reaction with RSiCl_3. Thus, few RSi groups are introduced to CB.
(2) Alkylation reaction was carried out by using strong base (n-BuLi/t-BuOK) to a … More bstract aromatic hydrogen followed by alkylation with alkyl iodides. Numbers of alkyl groups introduced to spherules estimated by the change in H/C ratios were much higher than that introduced to CB,although CB had high specific surface area than spherules. Alkylated spherules dispersed in toluene for a long period and may by applicable to conductive paints.
2. Surface modification of spherules by the interfacial reactions
(1) Pd (NH_3)_4^<2+> was supported on the oxidative spherules followed by electroless Ni plating in basic aqueous solutions containing NiSO_4 and Na_2H_2PO_2. The product was covered with Ni thin film completely and its magnetic moment was as high as half to bulk Ni.
(2) The oxidation spherules were treated in stepwise with Na_2OnSiO_2 in aqueous solution, in benzene, and with (NH_4)_2SO_4 in aqueous solution to proceed interfacial reaction by the formation of W/O emulsion. After the reaction, spherules were covered with silica thin film. The silica film was porous and potentially applicable to a support as a catalyst. Less

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] H.Hirose: "Raman Study of the Effect of Intense Laser Irradiation on Graphitized Mesophase Spherules" Solid State Commun.101(4). 225-229

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Teranishi: "Electroless Metal Plating on Carbonaceous Mesophase Spherules" Carbon. 34(5). 589-594

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ida: "Effect of Pretretment on Carbonization Properties of Resin Fraction Separated from a Solvent-Refined Coal" Carbon. 33(5). 617-624

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ida: "Carbonization of Methylene-Bridged Aromatic Oligomers:Effect of Alkyl Substiucents" Carbon. 33(5). 625-632

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 三宅 幹夫: "コプロセッシングにおける水素移動" 日本エネルギー学会誌. 74(5). 269-301

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 三宅 幹夫: "新・炭素材料入門" (株)リアライズ社, 234

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Hirose, G.Mizutani, S.Ushioda, Y.Yamazaki, and M.Miyake: "Raman Study of the Effect of Intense Laser Irradiation on Graphitazed Mesophase Spherules" Solid State Commun.101 (4). 225-229 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Teranishi, K.Takeda, Y.Yamazaki, and M.Miyake: "Elelctroless Metal Plating in Carbonaceous Mesophase Spherules" Carbon. 34 (5). 589-594 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ida, M.Miyake, T.Okura, D.Medhanavin, and M.Nomura: "Effect of Pretreatment on Carbonization Properties of Resin Fraction Separated from a Solvent-Refined Coal" Carbon. 33 (5). 617-624 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ida, K.Akada, T.Okura, M.Miyake, and M.Nomura: "Carbonization of Methylene-Bridged Aromatic Oligomers : Effect of Alkyl Substituents" Carbon. 33 (5). 625-632 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Miyake, K.Takahashi, J.Higashine, A.Kido, and M.Nomura: "Hydrogen Transfer during Coprocessing Reactions" J.Jpn.Inst.Energy. 74 (5). 269-301 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Miyake: "New ; Introduction to Carbonaceous Materials" Realize Co.234 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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