摘要
为了扩大木材的应用领域和降低碳纤维的成本,以木材液化物为原料,加入六次甲基四胺熔融纺丝,经甲醛和盐酸溶液固化处理后获得木材液化物碳纤维原丝,利用IR、XRD、拉曼光谱分析仪等初步揭示了木材液化物碳纤维原丝在炭化过程中微结构的变化。结果表明:炭化温度400℃以上,木材液化物原丝中出现了较明显的(100)衍射峰;炭化温度500℃以上在1360cm-1处附近出现D峰、1595cm-1处附近出现G峰;随炭化温度的提高,原丝内部微观结构逐步趋于有序化;炭化过程中,原丝分别在500和800℃时结构发生了两次大的改变,但代表芳环骨架振动的1632、1454cm-1处吸收峰在整个炭化过程中依然存在,表明木材液化物原丝是一种难石墨化的高分子材料。
In order to expand the utilization fields of wood and decrease the costs of carbon fiber, carbon fiber precursor from liquefied wood was prepared by soaking liquefied wood in the solution of hydrochloric acid and formaldehyde, after melt-spinning by adding hexamethylenetetramine. The microstructure evolution of the precursor during carbonization was studied by FTIR, X-ray analysis and Raman Spectroscopy. The results showed that the precursor from liquefied wood above 400℃ had a diffraction peak corresponding to the （100） crystal plane. When the carbonization temperature reached 500℃, Raman Spectroscopy showed the D peak at 1 360 cm^-1 and the G peak at 1 595 cm^-1. With increasing carbonization temperature, the microstructure of the precursor became more ordered. Although the structure of the precursor changed between 500 and 800℃, the bands at 1 632 and 1 454 cm^- 1 corresponding to the characteristic vibrations of aromatic ring still existed during carbonization. It shows that the precursor from liquefied wood is hard to be graphitized.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2009年第5期112-116,共5页
Journal of Beijing Forestry University
基金
"948"国家林业局引进项目(2008-4-71)
天津科技大学引进人才科研启动基金项目(20070447)
关键词
碳纤维
木材液化物
微结构
温度
carbon fiber
liquefied wood
microstructure
temperature
