Nano-healing mechanism of surface flaws on high strength carbon fibers with high-temperature vapor deposition polymerization polyimide coatings

• Project/Area Number: 22710091
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Nanostructural science
• Research Institution: National Institute for Materials Science
• Principal Investigator: NAGANUMA Tamaki 独立行政法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, MANA研究者 (40391213)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 表面・界面 / ナノ構造 / ヒーリング / 高温蒸着重合 / 炭素繊維 / 繊維引張強度

Research Abstract

The effect of polyimide coatings on the filament tensile strength of high strength polyacrylonitrile-based carbon fiber was studied by using a high-temperature vapor deposition polymerization(VDP) coating processes. We found that this coating has a positive impact on those fibers with artificial notches less than 30 nm in depth and the potential to heal nano-ordered surface flaws(nano-flaws) of the fibers, resulting in a 25% increase of the filament tensile strength. The formation of a high-dense phase and a weak interface near a fiber surface seem to contribute to increase the filament tensile strength as well as efficient infiltration of the VDP coating into nano-flaws.

Research Products

• [Journal Article] High-temperature vapor deposition polymerization polyimide coating for elimination of surface nano-flaws in high-strength carbon fiber (2011)
  • Author(s): Tamaki Naganuma, Kimiyoshi Naito, Jenn-Ming Yang
  • Journal Title: Carbon Volume: Vol.49 Pages: 3881-90
  • Peer Reviewed
• [Journal Article] High-temperature vapor deposition polymerization polyimide coating for elimination of surface nano-flaws in high-strength carbon fiber (2011)
  • Author(s): T.Naganuma, K.Naito, J-M Yang
  • Journal Title: Carbon Volume: VOL.49 Issue: 12 Pages: 3881-3890
  • DOI: 10.1016/j.carbon.2011.05.026
  • Peer Reviewed
• [Journal Article] Polyimide nanocoating for healing surface flaws of carbon fiber (2010)
  • Author(s): Tamaki Naganuma, Kimiyoshi Naito, Jenn-Ming Yang, Yutaka Kagawa
  • Journal Title: Proceedings 2010 SAMPE Europe International Conference & Forum Pages: 90-95
  • Peer Reviewed
• [Journal Article] POLYIMIDE NANOCOATING FOR HEALING SURFACE FLAWS OF CARBON FIBE (2010)
  • Author(s): TAMAKI NAGANUMA, KIMIYOSHI NAITO, JENN-MING YANG, YUTAKA KAGAWA
  • Journal Title: PROCEEDINGS 2010 SAMPE EUROPE INTERNATIONAL CONFERENCE & FORUM Pages: 90-95
  • Peer Reviewed
• [Presentation] Elimination of surface nano-flaws on carbon fiber with VDP polyimide coating (2011)
  • Author(s): Tamaki Naganuma
  • Organizer: EUROMAT2011
  • Place of Presentation: France-Montpellier
  • Year and Date: 2011-09-14
• [Presentation] Elimination of surface nano-flaws on carbon fiber with VDP polyimide coating (2011)
  • Author(s): Tamaki Naganuma
  • Organizer: EUROMAT2011
  • Place of Presentation: France, Montpellier
  • Year and Date: 2011-09-14
• [Presentation] POLYIMIDE NANOCOATING FOR HEALING SURFACE FLAWS OF CARBON FIBE (2010)
  • Author(s): TAMAKI NAGANUMA, KIMIYOSHI NAITO, JENN-MING YANG, YUTAKA KAGAWA
  • Organizer: SAMPE EUROPE SEICO 10-INTERNATIONAL CONFERENCE PARIS
  • Place of Presentation: フランス・パリ
  • Year and Date: 2010-04-13