二维小角X射线散射法研究PAN基炭纤维内部微孔结构

新型炭材料, 2009, 24(3): 270-276.

二维小角X射线散射法研究PAN基炭纤维内部微孔结构

盛毅 ^1, , 张彩红 ^2, , 徐耀 ^3, , 吕春祥 ^4, , 吴刚平 ^5, , 吴忠华 ^6, , 李志宏 ^7,

1.中国科学院炭材料重点实验室中国科学院山西煤炭化学研究所,山西,太原,030001;中国科学院研究生院,北京,100049

2.中国科学院炭材料重点实验室中国科学院山西煤炭化学研究所,山西,太原,030001;中国科学院研究生院,北京,100049

3.中国科学院炭材料重点实验室中国科学院山西煤炭化学研究所,山西,太原,030001

4.中国科学院炭材料重点实验室中国科学院山西煤炭化学研究所,山西,太原,030001

5.中国科学院炭材料重点实验室中国科学院山西煤炭化学研究所,山西,太原,030001

6.中国科学院高能物理研究所,同步辐射实验室,北京,100039

7.中国科学院高能物理研究所,同步辐射实验室,北京,100039

基金项目: 国家自然科学基金重点项目(10835008)

关键词： SAXS , 炭纤维 , 孔结构 , 分形维数 , 密度波动

Investigation of PAN-based carbon fiber microstructure by 2D-SAXS

利用二维小角X射线散射(2D-SAXS)方法,对PAN基炭纤维全部方位角进行微孔结构的研究.样品选取自制炭纤维MHS及日本东丽公司T300,T800产品.结果表明:MHS炭纤维微孔尺寸介于T300与T800之间,长径比t值小于T300和T800.T300中较小微孔(<9.1 nm)和较大微孔(>15.4nm)的含量大于MHS,T800含有大量的微孔短轴小于2nm的小尺寸微孔.MHS炭纤维的界面复杂程度较T300大,而小于T800.炭纤维内部存在由微孔散射导致的密度波动,其波动振幅F值和波动密度n值按MHS、T300和T800依次递减;电子密度波动越小,表明微孔结构越规整,T800的孔结构最规整.炭纤维内各个取向上均有一定结构的微孔分布,但总体上呈现沿纤维轴方向的定向排列.

参考文献

[1]	贺福;王茂章.炭纤维及其复合材料[M].北京:科学出版社,1995
[2]	徐仲愉;刘洪波;张红波.PAN石墨纤维的拉伸断裂机制[J].炭素技术,1993(02):21-23.
[3]	贺福,杨永岗,王润娥.用SEM研究PAN基碳纤维的表面缺陷[J].高科技纤维与应用,2002(06):25-29.
[4]	Yu-Jun Bai;Cheng-Guo Wang;Ning Lun .HRTEM microstructures of PAN precursor fibers[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(9):1773-1778.
[5]	贺福.用拉曼光谱研究碳纤维的结构[J].高科技纤维与应用,2005(06):20-25.
[6]	Lozano-Castello D.;Raymundo-Pinero E.;Cazorla-Amoros D.;Linares-Solano A.;Muller M.;Riekel C. .Characterization of pore distribution in activated carbon fibers by microbeam small angle X-ray scattering[J].Carbon: An International Journal Sponsored by the American Carbon Society,2002(14):2727-2735.
[7]	李东风,王浩静,贺福,王心葵.T300和T700炭纤维的结构与性能[J].新型炭材料,2007(01):59-64.
[8]	李国希.活性炭纤维微孔结构分析方法[J].新型炭材料,2001(01):76-79.
[9]	华中,王月梅,赵萍,赵书华.应用Raman光谱方法研究PAN基炭纤维中sp2杂化的C-C原子键距与碳化温度的关系[J].吉林师范大学学报(自然科学版),2003(01):77-79.
[10]	Zhenyu Ryu;Jingtang Zheng;Maozhang Wang;Bijiang Zhang .Nitrogen Adsorption Studies of PAN-Based Activated Carbon Fibers Prepared by Different Activation Methods[J].Journal of Colloid and Interface Science,2000(2):312-319.
[11]	Glatter O;Kratky O.Small Angle X-ray Scattering[M].New York:Academic Press,Inc,1982
[12]	Gorgl R;Maier G.Small-angle X-ray scattering with the new NanoSTAR-U-Principles & applications[A].Book Series:VDI BERICHTE,2004:69-73.
[13]	Pedersen JS .A flux- and background-optimized version of the NanoSTAR small-angle X-ray scattering camera for solution scattering[J].Journal of Applied Crystallography,2004(3):369-380.
[14]	孟昭富.小角X射线散射理论及应用[M].长春:吉林科学技术出版社,1996
[15]	Boris Imelik;Vedrine J C.Catalyst Characterization:Physical Techniques for Solid Materials[M].New York:Plenum Press,1994:445-465.
[16]	PERRET R;RULAND W .The Microstructure of PAN-base carbon fibres[J].Journal of Applied Crystallography,1970,3:525-531.
[17]	Shiyoa M;Takaku A .Characterization of microvoids in carbon fibers by absolute small-angle X-ray measurements on a fiber bundle[J].Journal of Applied Crystallography,1985,58(11):4074-4082.
[18]	Katsuya Fukuyama;Yasutoshi Kasahara;Naoto Kasahara;Asao Oya;Keiko Nishikawa .Small-angle X-ray scatteing study of the pore structure of carbon fibers prepared from a polymer blend of phenolic resin and polystyrene[J].Carbon: An International Journal Sponsored by the American Carbon Society,2001(2):287-290.
[19]	Anunay Gupta;Harrison I R .Small-angle X-ray scattering in carbon fibers[J].Journal of Applied Crystallography,1994,27:627-636.
[20]	Mandelbrot B B.Fractal:Form,Chance and Dimension[M].San Francisco:Freeman,1977
[21]	Falconer K;曾文曲;刘世耀.分形几何-数学基础及其应用[M].沈阳:东北工学院出版社,1991:42.
[22]	龙期威.材料中的多度域分形[A].合肥:中国科学技术大学出版社,1993:284-290.
[23]	Mandelbrot B B;Passaja D E;Paully A J .Fractal character of fracture surfaces of metals[J].Nature,1984,308:721-722.
[24]	林鸿溢;李映雪.分形论[M].北京:北京理工大学出版社,1992
[25]	Schmidt P W .Small-angle scattering studies of disordered,porous and fractal systems[J].Journal of APPLIED CRYSTALLOGRAPHY,1991,24:414-435.
[26]	张济忠.分形[M].北京:清华大学出版社,1995
[27]	Bale H D;Sehmidt P W .Small-angle X-ray scattering investigation of submicroscopic porosity with fractal properties[J].Phsical Review Letters,1984,53:596-599.
[28]	Ruland W .Small-angle scattering of two-phase systems:determination and significance of systematic deviations from Porod's law[J].Journal of Applied Crystallography,1971,4:70.
[29]	Yao Xu;Zhihong Li;Wenhao Fan;Dong Wu;Yuhan Sun;Lixia Rong;Baozhong Dong .Density fluctuation in silica―PVA hybrid gels determined by small-angle X-ray scattering[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2004(1/4):116-123.

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网