Preparation and Characterization of Micro-coiled Carbon Fibers

doi:10.3724/SP.J.1077.2012.00541

Abstract

Abstract:

Carbon microcoils (CMCs) were synthesized by the catalytic decomposition of acetylene using nickel sulfide particles as the catalyst which prepared by solvothermal method. The morphology and microstructure of the catalyst and micro-coiled carbon fibers were examined by SEM, FT-IR and XRD. The results showed that the catalyst was regular hexagonal phase nickel sulfide with its diameter of 1-2 μm and a smooth surface. CMCs have double helix structure, rectangular cross-section and identical coil diameter. The molecular structure of CMCs contained both unsaturated –C=C– and saturated –CH₂– and –CH₃ groups. The microstructure of CMCs was of poor degree of order with a low graphitization degree, containing a certain amount of amorphous carbon and crystal defects.

Key words: carbon microcoils, solvothermal, nickel sulfide, microstructure, catalytic decomposition

CLC Number:

TQ342

LI Ning, KOU Kai-Chang, CHAO Min, ZHANG Dong-Na, WU Guang-Lei, MA Li-Peng. Preparation and Characterization of Micro-coiled Carbon Fibers[J]. Journal of Inorganic Materials, 2012, 27(5): 541-544.

Figures/Tables 6

Fig. 1 (a) SEM image and (b) XRD pattern of NiS particles

Fig. 2 SEM image of the CMCs prepared without thiophene

Fig. 3 (a) Low and (b) high magnification SEM images of the CMCs prepared under optimal conditions

Fig. 4 Morphologies of micro-coiled carbon fibers prepared at different temperatures (a) 700℃; (b) 750℃; (c) 800℃

Fig. 5 FT-IR spectrum of micro-coiled carbon fibers

Fig. 6 XRD pattern of micro-coiled carbon fibers

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