Microstructural Control of Laminated Compounds by the Modification of Pitches at Low Temperatures

通过低温改性沥青来控制层压化合物的微观结构

• 批准号: 08405056
• 负责人: YASUDA Eiichi
• 金额: $ 16.51万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08405056/
• 关键词: Pitch; Carbonization; Charge-transfer Complexes; Iodine; Carbon Yield; 炭素前駆体; ヨウ素処理; 組織制御; 化学特性; 反応機構; 無機化合物添加; 力学特性

Precise evaluation on iodine-treated pitch has been carried out using FT-IR, pulsed-EPR, elemental analysis, ^<127>I-MR and viscometer for considering the reforming mechanism of pitch by iodine. Viscosity of pit h increased by 100。C iodine-treatment and de-hydration reaction took place during the iodine treatment. ^<127>I-NMR analysis reveled that almost iodine existed in pitch in a form of molecule or ion. Iodine made charge-transfer complexes with condensed aromatic molecules having ca.14 number of six-member-rings ; which was analyzed using pulsed-EPR etc.Carbon yield increased and the size in microstructure of produced carbon decreased by iodine treatment. C/C composites could be produced without densification process, i.e. in autoclave, using pitches having low softening point. The composites maintained its shear strength after higher heat-treatment. Gas analysis during carbonization revealed that iodine played an important role on polymerization during the process.Above the all results conclude as follows ; (1) iodine makes charge-transfer complex with molecules in pitch at low temperature and proceed de-hydration of the pitch. (2) Viscosity of the pitch increases, which results in good formability. (3) The microstructure of the produced carbon decreases.

为了探讨碘对沥青的改性机理，采用FT-IR、脉冲EPR、元素分析、~ 1H-NMR和粘度计等方法对碘改性沥青进行了精确的评价<127>。窖h的粘度增加了100。在碘处理过程中发生了碘处理和脱水反应。~ 11 <127>I-NMR分析表明，碘几乎以分子或离子的形式存在于沥青中。碘与具有约14个六元环的稠合芳族分子形成电荷转移络合物，用脉冲EPR等分析。碘处理使碳产率增加，生成的碳的微观结构尺寸减小。采用软化点低的沥青，可以不经过致密化过程，即在高压釜中制备C/C复合材料。该复合材料在较高的热处理后保持其剪切强度。碳化过程中的气体分析表明，碘在碳化过程中对聚合反应起了重要作用，主要结论如下：（1）碘在低温下与沥青分子发生电荷转移络合，使沥青脱水。(2)沥青的粘度增加，这导致良好的成形性。(3)生成的碳的微观结构降低。

项目成果

Eiichi Yasuda: "Development of C/C Composite" Journal of the Japan Institute of Energy. 77[9]. 841-848 (1998)

安田荣一：日本能源研究所期刊《C/C复合材料的发展》。

安田榮一: "カーボンアロイとC/C複合材料" 日本エネルギー学会誌. 77[9]. 841-848 (1998)

安田荣一：“碳合金和C/C复合材料”，日本能源研究所学报77[9]。

T.KIKUTANI et al.: "High Speed Melt Spinning of PET" International Polymer Processing. XI. 42-49 (1996)

T.KIKUTANI 等人：“PET 的高速熔融纺丝”国际聚合物加工。

Y.Ishiguro,T.Akatsu,Y.Tanabe and E.Yasuda: "Shear Failure Behavior of Continuous Fiber Reinforced Ceramic Matrix Composites" key Engineering Materials. 164-165. 171-174 (1999)

Y.Ishiguro、T.Akatsu、Y.Tanabe 和 E.Yasuda：“连续纤维增强陶瓷基复合材料的剪切破坏行为”关键工程材料。

安田 榮一 他: "C/Cコンポジット" OHM. 83. 65-68 (1996)

安田荣一 (Eiichi Yasuda) 等人：“C/C 复合材料”OHM 83. 65-68 (1996)