聚丙烯腈纤维片层组织结构演变历程的研究  

Study on the Evolution of PAN Fiber Sheet Structure

作　　者：王延相[1] 王成国[1] 朱波[1] 何东新[1] 季保华[1] 王强[1] 

机构地区：[1]山东大学碳纤维工程技术研究中心,济南250061

出　　处：《合成纤维》2005年第6期10-13,共4页Synthetic Fiber in China

基　　金：国家十五期间863项目(基金号2002AA304130);国家自然科学基金项目(基金号59783002)。

摘　　要：为了研究原丝中片层微观组织的演变性,借助电子显微镜,跟踪了片层组织结构在纺丝、预氧化和炭化过程中所发生的变化.结果发现:原丝由取向不同的片层组织结构构成,形成最终碳纤维后,碳层不会在C轴上做有规则的ABA式堆砌,个别的碳层面绕C轴发生旋转而失去碳层的三维有序结构,仅仅生成二维有序的乱层结构.预氧化纤维有'皮芯结构',外层由与纤维轴平行或者倾斜成一定角度的微纤片层结构组成,而内部是杂乱无章的片层结构,或者是微小的空隙,皮层的厚薄与预氧化处理方式有关.经过1000℃烧制的碳纤维层片厚度约为0.03～0.10μm.经过1350℃炭化后所得的纤维,由许多类似鱼鳞的片层构成,片层上有纳米级的微晶.This article follows up the change of lamella structure in PAN fiber spinning, preoxidation and carbonization process using electron microscope in order to find the evolution of sheet structure. The result shows that the PAN precursors made from the lamella texture is different direction of orientation. Because carbon plane does not regularly stack along the fiber axis, even the individual carbon plane not only circulates its fiber axis but also loses its three dimensional ordered structure, so resulting carbon fibers is two-dimensional turbulent structure. The preoxidated fibers consists of sheath-core structure, the sheet-like crystallite makes up of the outer layer whichis parallels or the fixed angle with the fiber axis, but there are some unordered turbulent layers or tiny pores.Tthe thickness of the outer layers are related to the Preoxiclation method. The flake thickness of carbon fibers is about 0.03~0.1 ?滋m in carbonization at 1000 ℃, but it is made up of lamella which has more little nanometer crystallite looking like scale in carbonization at 1350 ℃.

关 键 词：组织结构 聚丙烯腈纤维 演变历程 三维有序结构 电子显微镜 预氧化纤维 预氧化处理 微观组织 炭化过程 结构构成 片层组织 乱层结构 皮芯结构 结构组成 碳纤维 ABA 碳层 纳米级 原丝 C轴 纺丝 烧制 

分 类 号：TQ342.74[化学工程—化纤工业]