欢迎登录材料期刊网

材料期刊网

高级检索

为了研究聚丙烯腈纤维各级超分子结构形态及结晶的微观形态,弄清楚制备碳纤维的过程与所得到纤维结构和性能的关系,用透射电子显微镜分析了凝胶网络和皮芯结构的形成及预氧化和炭化过程中纤维结构的演变历程.结果表明:原丝具有明显的皮芯结构,外表层凹凸不平,从表层至心部是一层过渡区,表层的片层较心部的薄且致密.碳纤维网络骨架间接点的密集程度和原丝的密集程度有直接关系,原丝网络骨架的接点密集度低及晶粒组织大,随后得到的最终碳纤维密集度低及晶粒组织也大,其强度和模量明显高.碳纤维强度主要是纤维中弥散分布的"小晶区"做出的贡献;原丝微观结构中,"晶区"数量、大小和弥散分布情况以及构成三维空间网络结构的致密程度决定了预氧丝和碳纤维的性能.

参考文献

[1] W S Lyoo;S O Son;G C Kang et al.Preparation of polyacrylonitrile microfiber using gelation and phase separation during the solution polymerization of acrylonitrile[J].Macromolecular Rapid Communications,2001,22(04):1172-1175.
[2] Y Huang;R J Young .Effect of fiber microstructure upon the modulus of PAN-and -PITCH based carbon fibers[J].CARBON,1994,33:97-107.
[3] A Bismarack;M E Kumru;J Springer .Influence of oxygen plasma treatment of PAN-Based carbon fibers on their electrokinetic and wetting properties[J].Journal of Colloid and Interface Science,1999,210:60-72.
[4] M Minagawa;K Miyano;T Morita .Dissolution behavior of highly isotactic polyacrylonitrile in N, N-Dimethylformamide at an elevated temperature[J].Macromolecules,1989,22:2054-2058.
[5] R J Hobson;A H Windle .Crystalline structure of atactic polyacrylonitrile[J].Macromolecules,1993,26:6903-6907.
[6] R J Smiley;W N Delgass .AFM,SEM and XPS characterization of PAN-Based carbon fibres etched in oxygen plasmas[J].Journal of Materials Science,1993,28:3601-3611.
[7] Huang Y.;Young RJ. .EFFECT OF FIBRE MICROSTRUCTURE UPON THE MODULUS OF PAN-AND PITCH-BASED CARBON FIBRES[J].Carbon: An International Journal Sponsored by the American Carbon Society,1995(2):97-107.
[8] J L Figueiredo;Ph Serp;B Nysten;J P Issi .Surface treatment of vapor grown carbon fibre produced on a substrate, Ⅱ AFM[J].Carbon,1999,37:1809-1816.
[9] A Bismarck;C Wuertz;J Springer .Basic surface oxides on carbon fibres[J].Carbon,1999,37:1019-1027.
[10] J B Donnet;R U Qin .Study of carbon fibres surfaces by scanning tunneling microscopy[J].Carbon,1992,30:787-796.
[11] J B Donnet;R Y Qin .Study of carbon fibres surfaces by scanning tunneling microscopy[J].Carbon,1993,31:7-12.
[12] W P Hoffman .Scanning probe microscopy of carbon fiber surfaces[J].Carbon,1992,30:315-331.
[13] A Deurbergue;A Oberlin .TEM study of some recent high modulus PAN-based carbon fibers[J].Carbon,1992,30:981-987.
[14] G Hinrichsen;H Orth .Direct evidence of colloidal structure on drawn polyacrylonitrile[J].Polymer Letters,1971,9:529-531.
[15] S C Bennett;D J Johnson;R Murray .Structural characterization of a high-modulus carbon fiber by high-resolution electron microscopy and electron diffraction[J].Carbon,1976,14:117-122.
[16] P A Zhdan;D Grey;J E Castle .Surface structure of the PANbased carbon fibers studied by the scanning probe microscopy(SPM)[J].Surface and Interface Analysis,1994,22:290-295.
[17] 殷敬华;莫志深.现代高分子物理学[M].北京:科学出版社,2000:175-180.
[18] 徐仲榆.我国在生产碳纤维过程中应解决的一些问题[J].材料导报,2000(11):16-18.
[19] Edie DD. .The effect of processing on the structure and properties of carbon fibers[J].Carbon: An International Journal Sponsored by the American Carbon Society,1998(4):345-362.
[20] 贺福;赵建国 .世纪之交展望我国的碳纤维工业[J].化工新型材料,2000,28(03):3-7.
[21] S. CHAND .Review Carbon fibers for composites[J].Journal of Materials Science,2000(6):1303-1313.
[22] Toray Industries Inc .Carbon fibers, acrylic fibers and process for producing the acrylic fibers[P].US 6221490B1,2001.
[23] M Balasubramanian;M K Jain;S K Bhattacharya;A S Abhiraman .Conversion of acrylonitrile-based precursors to carbon fibres[J].Journal of Materials Science,1987,22:3864-3872.
[24] T H Ko;C H Lin;H Y Ting .Structure changes and molecular motion of polyacrylonitrile fibers during pyrolysis[J].Journal of Applied Polymer Science,1989,37:553-556.
[25] H A Kataman;P M Adams;T D Le;C S Hemminger .Characteration of low thermal conductivity PAN-based carbon fibers[J].CARBON,1994,32:379-391.
[26] 李青山;沈新元.腈纶生产工学[M].北京:中国纺织出版社,2000:65-77.
[27] 沈新元.高分子材料加工原理[M].北京:中国纺织出版社,2000:120-145.
[28] 李小佳,罗倩华,朱一钧,王海舟.聚丙烯腈基碳纤维预氧化过程[J].中国科学B辑,2001(01):72-77.
[29] 王茂章;贺福.碳纤维的制造、性质及其应用[M].北京:科学出版社,1984:175-190.
[30] 吴人杰.现代分析技术[M].上海:上海科学技术出版社,1997:197-216.
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:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%