High Strengthening of Carbon Fiber by Imposition ofa High Magnetic Field

通过施加强磁场实现碳纤维的高强度化

• 批准号: 12555187
• 负责人: ASAI Sigeo
• 金额: $ 5.89万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555187/
• 关键词: electromagnetic processing of materials; material science; carbon fiber; electromagnetic science; high magnetic field; pitch; crystal orientation; composite materia ls; 材料プロセッシング

It has been found that when PAN-based carbon fibers are processed under a high magnetic field in the graphitization process, their tensile strength is increased in 30% in comparison with that processed under no magnetic field. It has also been investigated that in the carbonization process, the tensile strength of carbon fibers processed under a high magnetic field is higher than that under no magnetic field. Furthermore, in the stabilization process, the effect of a magnetic field on carbon fibers processed in a low tension is larger than that processed in a high tension.It has been found that when a coal tar pitch is heat-treated, appearing mesophase spherules coalesce under the imposition of a magnetic field and their sizes are increased with increase of a magnetic field intensity. The further long heat-treating time changs mesophase spherules to tabular carbons. The morphology change was investigated by use of IR spectra. It has been found that a dehydrogenation reaction is promoted by imposition of a high magnetic field. Furthermore, the reason that the dehydrogenation reaction is promoted by the imposition of a high magnetic field can be explained on the basis ofa radical pair theory in a magnetic field.

研究发现，在石墨化过程中，PAN基碳纤维在强磁场下加工时，其拉伸强度比无磁场下加工时提高了30%。研究还表明，在碳化过程中，在高磁场下加工的碳纤维的拉伸强度比在无磁场下加工的要高。此外，在稳定化过程中，磁场对低张力处理的碳纤维的影响大于高张力处理的碳纤维。研究发现，当对煤焦油沥青进行热处理时，出现的中间相球粒在磁场的作用下聚结，并且它们的尺寸随着磁场强度的增加而增大。进一步较长的热处理时间将中间相球粒转变为板状碳。通过使用红外光谱研究形态变化。已经发现，通过施加高磁场可以促进脱氢反应。此外，通过施加高磁场促进脱氢反应的原因可以基于磁场中的自由基对理论来解释。

项目成果

成〓圭, 佐々健介, 井上邦彦, 小川博靖, 堂山昌男, 山田恵彦, 浅井滋生: "炭素化過程における強磁場印加によるPAN系炭素繊維の強化"炭素. 2001・200. 255-260 (2001)

Kei Nari、Kensuke Sasa、Kunihiko Inoue、Hiroyasu Okawa、Masao Doyama、Keihiko Yamada、Shigeo Asai：“通过在碳化过程中施加强磁场来增强 PAN 基碳纤维”Carbon.2001・200. ）

Takeshi Torii, Kensuke Sassa, Shigeo Asai: "Effect of High Magnetic Field on Formation of Carbonaceous Mesophase Spherules"CAMP-ISIJ. Vol.14. 870 (2001)

Takeshi Torii、Kensuke Sassa、Shigeo Asai：“强磁场对碳质中间相球粒形成的影响”CAMP-ISIJ。

M.G.Sung, Ksassa, T.Tagawa, T.Miyata, H.Ogawa, M.Doyama, S.Yamada, S.Asai: "Application of a high magnetic field in cabonization process to increase the strength of carbon fibers"Carbon. accepted to. (2001)

M.G.Sung、Ksassa、T.Takawa、T.Miyata、H.Okawa、M.Doyama、S.Yamada、S.Asai：“在碳化过程中应用高磁场以提高碳纤维的强度”Carbon。

成〓圭, 佐々健介, 浅井滋生: "強磁場印加による炭素繊維の高強度化の機構"まてりあ. 40・6. 568-572 (2000)

Kei Sei、Kensuke Sasa、Shigeo Asai：“通过施加强磁场提高碳纤维强度的机制”Materia 568-572（2000）。

Miwako Ito, Kensuke Sassa, Hiroyasu Ogawa, Masao Doyama, Shigehiko Yamada ,Shigeo Asai: "High Strengthening of PAN-based Carbon Fiber by Imposing of a High Magnetic Field in Graphitization Process"TANSO. 191. 37-41 (2000)

Miwako Ito、Kensuke Sassa、Hiroyasu Okawa、Masao Doyama、Shigehiko Yamada、Shigeo Asai：“通过在石墨化过程中施加强磁场实现 PAN 基碳纤维的高强度”TANSO。