Development of Carbon Skeletons in Pitches

沥青碳骨架的开发

• 批准号: 04044015
• 负责人: INAGAKI Michio
• 金额: $ 4.86万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04044015/
• 关键词: Carbon skeletons; Pitches; Mesophase; Polyimides; Carbon fibers; Carbon films; Graphite films; 異方性; 骨格構造; 組織; インターカレーション

The formation and growth of carbon skeletons, i.e., mesophase, in pitches which are in liquid state are understood in comparison with polyimides which are carbonized in solid state and vapor-grown carbon fibers which are grown in gas-phase carbonization. The structure and texture of carbons, which are resulted from the development of carbon skeletons, and their importance in carbon science and technology are discussed in the cases of films and fibers.1.Development of carbon skeletonsThe development of carbon skeletons depended strongly on chemical constitution and thermal history of pitches. Some pitches were heterogeneous at a micrometric scale, isotropic phase containing Brooks-Taylor type mesophase spheres and anisotropic domains consisting of basic structural units associated edge-to-edge with a long range statistical orientation. Some pitches were homogneous, consisting of anisotropic domains with a long range statistical orientation.2.Structure development in carbon materialsThe … More heterogeneous and homogeneous textures in pitches were found to be remained even after the spinning to fibers. From the pitch containing large amount of edge-to-edge anisotropic regions, for example, the fibers with radial texture in their cross-section were spinned, and their texture was found to be kept during oxidation, carbonization and subsequent graphitization. In the carbon films prepared from polyimides, the development of graphite structure was found to be strongly governed by the molecular orientation in the precursor polyimide films. The same situation was observed on vapor-grown carbon fibers.3.Textures in carbon materials and their functionsThe effects of texture in carbon materials on their functions were studied by focusing on the development of graphitic structure with high temperature heat treatment, the interaction with polymer matrices and intercalation of sulfuric acid and lithium ions by using carbon fibers with different textures. The mechanical properties of carbon fiber/carbon matrix composites were also studied. Less

通过与固态炭化的聚酰亚胺和气相炭化的气相生长的碳纤维相比较，可以了解碳骨架（即中间相）在液态沥青中的形成和生长。以薄膜和纤维为例，讨论了碳骨架发展所产生的碳的结构和结构及其在碳科学和技术中的重要性。碳骨架的发育碳骨架的发育在很大程度上取决于沥青的化学组成和热历史。一些沥青在微米尺度上是不均匀的，各向同性相包含布鲁克斯-泰勒型中间相球，各向异性畴由基本结构单元组成，具有边缘到边缘的长距离统计取向。有些音高是均匀的，由各向异性域组成，具有长距离的统计取向。碳材料的结构发展发现，即使纺丝到纤维中，沥青中仍然存在更多的异质和均匀的织构。例如，从含有大量边到边各向异性区域的沥青中，纺成截面呈径向织构的纤维，其织构在氧化、碳化和随后的石墨化过程中保持不变。在聚酰亚胺制备的碳膜中，石墨结构的发展与前驱体聚酰亚胺薄膜中的分子取向密切相关。在蒸汽生长的碳纤维上也观察到同样的情况。碳材料的织构及其功能研究了碳材料的织构对其功能的影响，重点从高温热处理石墨结构的发展、与聚合物基体的相互作用以及不同织构碳纤维对硫酸和锂离子的插层作用等方面进行了研究。研究了碳纤维/碳基复合材料的力学性能。少

项目成果

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Y. Hishiyama：“石墨插层化合物的新型主体材料——由新开发的聚酰亚胺薄膜制备的高质量石墨薄膜”Mol。

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