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以乙炔为碳源,镍粉为催化剂,噻吩为助催化剂,采用化学气相沉积法制备微螺旋炭纤维;在氩气气氛中,2500℃下对所制微螺旋炭纤维进行石墨化处理.通过扫描电子显微镜观察微螺旋炭纤维的螺旋形貌和微观结构,用热重法研究微螺旋炭纤维的耐氧化性能,并探讨了微螺旋炭纤维的氧化动力学行为.结果表明:石墨化处理对微螺旋炭纤维具有显著的纯化作用,其螺旋形貌基本保持不变.微螺旋炭纤维的氧化反应较好地服从一级反应.微螺旋炭纤维石墨化前后的氧化反应活化能分别为263.004kJ/mol和297.191kJ/mol.石墨化处理明显提了微螺旋炭纤维的抗氧化性能.

Carbon microcoils were prepared by catalytic chemical vapor deposition, using acetylene as carbon source, Ni powder as catalyst, and a sulfur-containing compound (thiophene) as growth promoter. The microcoils were graphitized under an argon atmosphere at 2 500 ℃. The morphology and microstructure of the oxidized carbon microcoils were investigated by scanning electron microscopy, and their oxidation resistance was studied by thermogravimetric analysis. Results reveal that oxidation resistance of the carbon microcoils is improved through graphitization, and the graphitized carbon microcoils retain their microcoil morphology after oxidation. Oxidation is a first order reaction and the activation energies are 263 and 297 kJ/mol before and after graphitization, respectively.

参考文献

[1] 高晓晴,郭全贵,史景利,李贵生,宋进仁,刘朗.短切炭纤维-炭复合材料的制备及传导性能和微观结构的研究[J].新型炭材料,2005(01):18-22.
[2] 吴峻峰,白朔,成会明.热处理对各向同性热解炭材料微观结构和力学性能的影响[J].新型炭材料,2006(03):225-230.
[3] 吴法宇,杜金红,刘辰光,李莉香,成会明.螺旋炭纤维的微观结构与储能特性[J].新型炭材料,2004(02):81-86.
[4] Chen X.;Motojima S.;Iwanga H. .Vapor phase preparation of super-elastic carbon micro-coils[J].Journal of Crystal Growth,2002(Pt.3):1931-1936.
[5] K. Yoshimura;K. Nakano;T. Miyake .Effectiveness of carbon microcoils as a reinforcing material for a polymer matrix[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(13):2833-2838.
[6] S. Motojima;S. Hoshiya;Y. Hishikawa .Electromagnetic wave absorption properties of carbon microcoils/PMMA composite beads in W bands[J].Carbon: An International Journal Sponsored by the American Carbon Society,2003(13):2658-2660.
[7] Y.Furuya;T.Hashishin;H.Iwanaga;S.Motoima;Y.Hishikawa .Interaction of hydrogne with carbon coils at low temperature[J].Carbon: An International Journal Sponsored by the American Carbon Society,2004(2):331-335.
[8] T. Katsuno;X. Chen;S. Yang .Relationship of a carbon microcoil and carbon microcoil tactile sensor element in electrical properties[J].Diamond and Related Materials,2007(4/7):1000-1003.
[9] K. Yoshimura;K. Nakano;T. Miyake .Effect of compressive and tensile strains on the electrical resistivity of carbon microcoil/silicone-rubber composites[J].Carbon: An International Journal Sponsored by the American Carbon Society,2007(10):1997-2003.
[10] Addamiano A .Preparation and properties of 2H SiC crystals[J].Journal of Crystal Growth,1982,58(03):617-622.
[11] Motojima S;Ueno S;Hattori T et al.Preparation of whiskers and spring-like fibres of Si3N4 by impurity-activated chemical vapour deposition[J].Journal of Crystal Growth,1989,96(02):383-389.
[12] Hai-Feng Zhang;Chong-Min Wang;Edgar C. Buck;Lai-Sheng Wang .Synthesis, Characterization, and Manipulation of Helical SiO_2 Nanosprings[J].Nano letters,2003(5):577-580.
[13] Motojima S;Kawaguchi M;Nozaki K et al.Growth of regularly coiled carbon filaments by Ni catalyzed pyrolysis of acetylene,and their morphology and extension characteristics[J].Applied Physics Letters,1990,56(04):321-323.
[14] Shibagaki K.;Motojima S. .Thermal behavior and effect of heat treatment in an inert gas on oxidized carbon microcoils[J].Carbon: An International Journal Sponsored by the American Carbon Society,2001(3):411-417.
[15] 王浩静,王红飞,李东风,朱星明,贺福,王心葵.石墨化温度对炭纤维微观结构及其力学性能的影响[J].新型炭材料,2005(02):157-163.
[16] 胡荣祖;史启祯.热分析动力学[M].北京:科学出版社,2001
[17] 高家武;雷渭媛;张复盛.高分子材料近代测试技术[M].北京:北京航空航天大学出版社,1994:55-84.
[18] 夏少武.活化能及其计算[M].北京:高等教育出版社,1993
[19] 毕辉,寇开昌,张教强,陈碧波.CVD法制备微螺旋炭纤维的研究[J].人工晶体学报,2007(03):559-564.
[20] 毕辉,寇开昌,王召娣,王志超,张教强.石墨化对微螺旋炭纤维形貌和微观结构的影响[J].无机材料学报,2008(02):398-402.
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