采用SEM揭示出Lyocell基炭纤维(LCF)表面比粘胶基炭纤维(RCF)表面光滑,而后者粗糙的表面上还存在裂纹和沟槽,这也是导致RCF强度偏低的一个原因.尝试利用扫描隧道显微镜(STM)的原子级分辨率来研究LCF的表面微结构.在500 nm×500 nm观测范围内,发现了由25 nm宽,150 nm长的条状微结构组成的约150 nm2大小的沿纤维轴呈近乎45°角排列的块状结构;并测得LCF表面碳原子间距离为0.331 nm,结果表明Lyocell基炭纤维表面尚未形成完整的碳网六元环结构.
参考文献
| [1] | 贺福;杨永岗.突破碳纤维产业化的"瓶颈"原丝已是当务之急[A].四川绵阳,2001:44-47. |
| [2] | 贺福,王润娥.碳纤维的形态缺陷[J].碳素,1984(02):39-43. |
| [3] | 稻垣道夫.炭材料中的组织[J].新型炭材料,1999(02):1-13. |
| [4] | 贺福.粘胶基炭纤维[J].新型炭材料,1999(02):79. |
| [5] | 杨序纲;王依民;陈惠芳 .粘胶纤维碳化过程中的形态学结构[J].中国纺织大学学报,1997,23:1-7. |
| [6] | 林志武;柯家骥.Lyocell纤维的历史、工艺、性能及发展前景[J].纺织科学研究,2000(01):29-33. |
| [7] | 张建春,施楣梧,朱华,来侃.Lyocell纤维皮芯结构的研究[J].纺织学报,2000(01):7-10. |
| [8] | 吴琪琳,潘鼎,邵惠丽.Lyocell纤维与国产粘胶纤维的对比研究[J].高分子材料科学与工程,2001(04):78-81. |
| [9] | Binning G;Rohrer H;Gerber C et al.Surface studies by scanning tunneling microscopy[J].Physical Review Letters,1982,49(01):57-61. |
| [10] | Hansma P K;Elings V B;Marti O et al.Scanning tunneling microscopy and atmotic force microscopy:Application to biology and technology[J].Science,1988,242:209. |
| [11] | Hansma P K;Tersoff J .Scanning tunneling microscopy[J].Journal of Applied Physics,1987,R1:61. |
| [12] | HoffmanWP;Elings V B;Gurley J A .Scanning tunneling microscopy on carbon fibers[J].Carbon,1988,26(05):754-756. |
| [13] | 胡天苗.碳纤维结构的STM观察研究[J].真空,1995(04):8. |
| [14] | Donn;Qin R Y .Study of carbon fiber surfaces by scanning tunneling microscopy Part I. Carbon fibers from different precursors and after various heat treatment temperatures[J].Carbon,1992,30(05):787-796. |
| [15] | Donn;Qin R Y .Study of carbon fiber surfaces by scanning tunneling microscopy Part II. PAN-based high strength carbon fibers[J].Carbon,1993,31(01):7-12. |
| [16] | Park Sang II;Quate C F .Tunneling microscopy of graphite in air[J].Applied Physics Letters,1986,48(02):112-114. |
| [17] | 王维波;林瑞峰;李学萍 等.表面改性碳纤维电极的STM微观形貌分析[J].电源技术,1995(19):1-3. |
| [18] | Jean baptiste Donnet;Tong-Kuan Wang;Zeng-Ming Shen .Morphological structure study of pitch fibre surfaces by scanning tunneling microscopy:Influnce of the mesophase content[J].Journal of Materials Science,1996,31:6621-6625. |
| [19] | HoffmanWP;Hurley W C;Owens T W et al.Advantage of the scanning tunneling microscope in documenting changes in carbon fibers surface morphology brought about by various surface treatments[J].Journal of Materials Science,1991,26(08):4545-4553. |
| [20] | 吴琪琳,胡杨,潘鼎.粘胶基碳纤维表面结构的STM研究[J].化学研究与应用,2002(02):171-173. |
| [21] | 吴琪琳;潘鼎 .一种新型纤维素基碳纤维的研制[J].功能材料,2001,10(z1):1798-1800. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%