炭纤维表面原位生长碳纳米管/纤维及其微观结构研究

采用均匀沉淀法在炭纤维表面加载纳米Ni催化剂, 在实验室立式化学气相沉积炉中, 以天然气或甲烷为碳源气体, 氢气为稀释气, 控制温度、炉压和碳/氢比, 在炭纤维表面原位制备了碳纳米管/纤维, 并对其形貌和结构进行了初步研究。结果表明: 采用均匀沉淀法可以在炭纤维表面成功制备颗粒比较均匀的纳米级催化剂Ni。相对于纯甲烷气而言, 天然气因其组分较多, 影响炭纤维表面原位生长纳米碳管或纤维的形貌及其完整性。采用催化裂解法在炭纤维表面生长的碳纳米管/纤维与炭纤维的界面结合良好。

In-situ Growth of Carbon Nano-tubes/Carbon Nano-fibers (CNTs/CNFs) on the Surface of Carbon Fibers and its Microstructure Investigation

Nano-scale nickel catalyst was coated on carbon fibers by homogeneous precipitation. Carbon nano-tubes/carbon nano-fibers(CNTs/CNFs) were in-situ prepared on the surface of carbon fibers in a vertical chemical vapor deposition furnace under proper pressure and C/H ratio with natural gas or methane as carbon source, hydrogen as dilution gas. The morphology and microstructure of the obtained CNTs/CNFs was investigated. Results showed that nano-scaled nickel catalysts were homogeneously prepared on the surface of carbon fibers by homogeneous precipitation. Compared with pure methane gas, natural gas influenced the morphology and structural integrity of the obtained CNTs/CNFs grown on the surface of carbon fibers due to its complex components. The interface between carbon fiber and CNTs/CNFs grown on the surface of carbon fibers combined well by catalytic pyrolysis method.