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Development of Supercritical CO_2 assisted polymer-processing techniques

Research Project

Project/Area Number 15360420
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Reaction engineering/Process system
Research InstitutionKyoto University

Principal Investigator

OHSHIMA Masahiro  Kyoto University, Engineering, Professor, 工学研究科, 教授 (60185254)

Co-Investigator(Kenkyū-buntansha) KANO Manabu  Kyoto University, Engineering, Associate Professor, 助教授 (30263114)
KIHARA Shin-ichi  Kyoto University, Engineering, Lecture, 講師 (30284524)
石川 健  三菱化学(株), 科学技術センタ, 研究員
谷垣 昌敬  京都大学, 工学研究科, 教授 (30027148)
安田 和治  旭化成(株), 加工技術開発部, 課長
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥15,500,000 (Direct Cost: ¥15,500,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2004: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 2003: ¥12,600,000 (Direct Cost: ¥12,600,000)
Keywordssupercritical carbon dioxide / plastic processing / plasticization effect / solvation effect / surface modification / supercritical fluids / nano imprint / polymer processing / ナノインプリンティング / ナノセルラーフォーム / 微細転写 / 液相浸漬法 / カーボンナノチューブ / 高分子表面改質 / 表面抵抗 / 近赤外分光法 / 導電性 / ポリ乳酸 / 親水化 / 収着 / ポリマー / ポリスチレン / 物質移動
Research Abstract

The application of CO_2 for processing the polymeric materials has been dramatically increased and CO_2 is being recognized as an efficient alternative to volatile organic solvents due to its environmentally benign characteristics as well as its advantageous properties of processing polymer. CO_2 can provide plasticization effect on polymer during the processing and ensure that the processed material does not contain any trace of solvent residue after processing.
In this three-year project, the following three major progresses could be achieved.
1)Utilizing the plasticization effect of CO_2 on polymer, dye, low molecular chemicals, such as PEG and carbon nanotube (CNT) were infused into the surface of thermoplastic polymers. Furthermore, the new CO_2 assisted surface modification injection molding scheme was proposed.
2)When the CO_2/polymer system is depressurized, scCO_2 diffuses out from the polymer while solute remains due to the difference of diffusivity in the polymer. The degree of … More solute infusion is dependent on the solubility of the solute in the scCO_2 and the affinity of the solute for the polymer matrix. To change the solubility of solute in the scCo_2, co-solvents such as alcohol and acetone are often used. In this study, the diffusivity and solubility of CO_2 and alcohol (propanol and/or ethanol) in molten low-density polyethylene (LDPE) was studied using near infrared spectroscopy and magnetic suspension balance.
3)Utilizing the plasticization effect of CO_2, a CO_2 assisted nano-imprinting and embossing scheme was developed. The surface of polymer product was plasticized by dissolving CO_2 in a high pressure mold stamping machine and the nanometer-scale fine pattern on the mold stamper was transferred to the plasticized surface without heating up the product. The thickness of the plasticized layer could be controlled in nanometer thickness by pressure level of CO_2 and CO_2 absorption time. The pattern transfer could be performed at room temperature without deforming the overall shape of the product. Less

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (13 results)

All 2005 2004

All Journal Article (10 results) Patent(Industrial Property Rights) (3 results)

  • [Journal Article] CO_2 Foaming of Poly(ethylene glycol)/Polystyrene Blends : Relationship of the Blend Morphology, Co_2 Mass Transfer, and Cellular Structure2005

    • Author(s)
      K.Taki, K.Nitta, S.Kihara, M.Ohshima
    • Journal Title

      J.App.Polym.Sci. 97・5

      Pages: 1899-1906

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Supercritical CO_2-Assisted Surface Coating Injection Molding2005

    • Author(s)
      M.Ohshima
    • Journal Title

      Encyclopedia of Chemical Processing

      Pages: 2897-2906

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] CO_2 Foaming of Poly(ethylene glycol)/Polystyrene Blends : Relationship of the Blend Morphology, CO_2 Mass Transfer, and Cellular Structure2005

    • Author(s)
      K.Taki, K.Nitta, S.Kihara, M.Ohsima
    • Journal Title

      J.App.Polym.Sci. 97, 5

      Pages: 1899-1906

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] CO_2 Foaming of Poly(ethylene glycol)/Polystyrene Blends : Relationship of the Blend Morphology, CO_2 Mass Transfer, and Cellular Structure2005

    • Author(s)
      Kentaro Taki, Kouei Nitta, Shin-ichi Kihara, Masahiro Ohshima
    • Journal Title

      J.App.Polym.Sci. 97・5

      Pages: 1899-1906

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Measurement and Prediction of Diffusion Coefficients of Supercritical CO_2 in Molten Polymers2004

    • Author(s)
      S.Areerat, Y.Hayata, D.Nakagawa, M.Ohshima
    • Journal Title

      Polymer Engineering and Science 44・10

      Pages: 1915-1924

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Visual Observation of CO_2 Foaming of Polypropylene-Clay Nanocomposites2004

    • Author(s)
      K.Taki, T.Yanagimoto, E.Funami, K.Okamoto, M.Ohshima
    • Journal Title

      Polymer Engineering and Science 44・6

      Pages: 1004-1011

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Measurement and Prediction of Diffusion Coefficients of Supercritical CO_2 in Molten Polymers2004

    • Author(s)
      S.Areerat, Y.Hayata, D.Nagasawa, M.Ohshima
    • Journal Title

      Polymer Engineering and Science 44, 10

      Pages: 1915-1924

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Visual Observation of CO_2 Foaming of Polypropylene-Clay Nanocomposites2004

    • Author(s)
      K.Taki, T.Yanagimoto, E.Funami, K.Okamoto, M.Ooshima
    • Journal Title

      Polymer Engineering and Science 44, 6

      Pages: 1004-1011

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Measurement and Prediction of Diffusion Coefficients of Supercritical CO_2 in Molten Polymers2004

    • Author(s)
      S.Areerat, Y.Hayata, D.Nakagawa, M.Ohshima
    • Journal Title

      Polymer Engineering and Science 44,10

      Pages: 1915-1924

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Visual Observation of CO_2 Foaming of Polypropylene-Clay Nanocomposites2004

    • Author(s)
      K.Taki, T.Yanagimoto, E.Funami, K.Okamoto, N.Ohshima
    • Journal Title

      Polymer Engineering and Science 44,6

      Pages: 1004-1011

    • Related Report
      2004 Annual Research Report
  • [Patent(Industrial Property Rights)] 樹脂成形加工方法及び樹脂成形体加工装置2005

    • Inventor(s)
      大嶋正裕, 野崎駿介
    • Industrial Property Rights Holder
      京都大学
    • Industrial Property Number
      2005-337728
    • Filing Date
      2005-11-22
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 誘電性樹脂成形体の製造方法および誘電性樹脂成形体2004

    • Inventor(s)
      大嶋正裕, 水谷英章, 志熊治雄
    • Industrial Property Rights Holder
      京都大学
    • Industrial Property Number
      2004-191605
    • Filing Date
      2004-06-28
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 導電性樹脂成形体の製造方法および導電性樹脂成形態2004

    • Inventor(s)
      大嶋 正裕, 水谷 英章, 志熊 治雄
    • Industrial Property Rights Holder
      京都大学
    • Industrial Property Number
      2004-191605
    • Filing Date
      2004-06-28
    • Related Report
      2004 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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