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

与在固态和蒸气生长的碳纤维中碳化的聚酰亚胺相比，可以理解碳骨架的形成和生长，即中间相，在液态状态下的间距。碳骨架的发展及其在碳科学和技术中的重要性，在膜和纤维的情况下讨论了碳骨架的结构和质地。1。碳骨骼的开发碳骨骼的发展，碳骨骼的发展依赖于化学构型和螺距的热史。某些音调在微米尺度上是异质的，各向同性相包含Brooks-Taylor型中间人球和各向异性结构域，由基本结构单元组成的基本结构单元与远距离统计方向相关的边缘到边缘。一些音调是同质的，由各向异性结构域组成，具有长距离统计方向。2。碳材料中的结构发展……甚至在纤维旋转后，螺距中更异质和均匀的质地也保持不变。例如，从包含大量边缘到边缘各向异性区域的螺距中，将其横截面中具有径向质地的纤维旋转，并发现其质地在氧化，碳化和随后的图形过程中被保留。在由聚酰亚胺制备的碳膜中，发现石墨结构的发展受到前体聚酰亚胺膜中的分子取向的强烈控制。在蒸汽生长的碳纤维上也观察到了同样的情况。3。碳材料及其功能中的文本及其功能是通过专注于与高温热处理的相互作用的相互作用的相互作用来研究碳材料对其功能的影响。碳纤维/碳基质组成的机械性能也是研究的。较少的

项目成果

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