微螺旋炭纤维的制备与表征

Preparation and Characterization of Micro-coiled Carbon Fibers

采用溶剂热法合成出硫化镍，并将其作为催化剂，催化热解乙炔制备出微螺旋炭纤维．通过SEM、FT-IR和XRD分析了催化剂和微螺旋炭纤维的形貌和微观结构．结果表明：硫化镍催化颗粒表面光滑、为规则的六方相结构，直径为1-2μm；微螺旋炭纤维具有双螺旋结构，截面为矩形，具有相同的螺径．微螺旋炭纤维分子结构中既含有不饱和的C=C双键，又含有饱和的-CH2-和-CH3基团，其微观结构整体有序度较差，存在一定量的无定型炭和晶体缺陷，石墨化度低．

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