HRTEM nanostructural evolution of onion-like spheres in polyacrylonitrile fibres during stabilization and carbonization

• Autorzy: Wen Y. , Li H. , Peng G. , Yang Y. , Liu L.
• Języki publikacji: EN

Abstrakty

EN

Ultrathin sections of polyacrylonitrile (PAN) fibre samples in the stabilization and carbonization stages were studied using high-resolution transmission electron microscopy. Supplementary analyses by the Fourier transform infrared, X-ray diffraction, thermogravimetry mass spectroscopy and elemental analysishave also been done. Results showed that the PAN fibres contained nanosized crystallites embedded in a continuous amorphous matrix. Amorphous onion-like spherical structures were also observed and their structural evolution was investigated. During the stabilization and carbonization process, the outer layers of the onion-like spheres gradually changed from an orderly layered structure into a disordered, dense structure due to cyclization and cross-linking reaction. During carbonization, the onion-like spheres became more dense and compact due to the merging of the ring structures. After carbonization, the onion-like spheres in the PAN fibres eventually turned into dense and amorphous domains of carbon fibres.

Słowa kluczowe

EN

high resolution transmission electron microscopy; carbon fibre; onion-like sphere

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2010
• Tom: Vol. 28, No. 2
• Strony: 479--490
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Wen Y.

autor

Li H.

autor

Peng G.

autor

Yang Y.

autor

Liu L.

• Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001China

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