Vertical continuous preparing device for carbon nano tube fibers and preparing method

Abstract

The invention provides a vertical continuous preparing device for carbon nano tube fibers. The vertical continuous preparing device comprises a carbon source injector, a tube furnace and a collecting box communicated with the tube furnace. The carbon source injector comprises a carbon source injection pump, a carbon source injection tube, a carbon source conveying tube and a flow limiting part, wherein one end of the carbon source injection tube is located in the tube furnace, the carbon source injection pump and the carbon source injection tube are communicated through the carbon source conveying tube, and the flow limiting part is arranged between the carbon source conveying tube and the carbon source injection tube. The carbon source injection pump injects a liquid-phase carbon source into the tube furnace through the carbon source conveying tube and the carbon source injection tube, a carbon source injection tube core is further arranged in the carbon source injection tube, one end of the carbon source injection tube core is arranged in the flow limiting part, and the other end of the carbon source injection tube core protrudes and stretches out of the carbon source injection tube. Compared with the prior art, the carbon source injector which is simple in structure and low in cost is adopted so that the liquid-phase carbon source can be uniformly injected and gasified, and finally the purpose of stably and continuously preparing the carbon nano tube fibers is achieved.

Description

technical field [0001] The invention relates to the field of nanomaterial manufacturing, in particular to a preparation device and method for vertical continuous carbon nanotube fibers. Background technique [0002] Carbon nanotube fiber materials have excellent mechanical, thermal and electrical properties, and have broad application prospects in the preparation of lightweight, high-strength, high-conductivity multifunctional fiber materials. Carbon nanotube fibers can be synthesized by floating catalysis, using liquid carbon sources such as ethanol, adding ferrocene and other catalysts, and passing them into a high-temperature tube furnace under the environment of hydrogen and nitrogen or hydrogen and inert gas carrier gas. Fibers (Li et al. Science 2004 and US Patent 2005 / 006801-A1). In recent years, the development of industrialized preparation technology of floating catalytic carbon nanotube fiber technology has received widespread attention. The floating carbon nanot...

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Problems solved by technology

In terms of the development of vertical continuous carbon nanotube fiber preparation equipment, the team of Professor Li Yali of Tianjin University used a traditional injection needle to inject liquid-phase carbon source, and the liquid-phase carbon source was brought into the high-temperature reactor by air flow for the preparation of carbon nanotube fiber , the liquid-phase carbon source injector method in this method is simple, but the liquid-phase carbon source is sent to the reaction system drop by drop, which is not conducive to the continuity of the subsequent process

In the prior art, someone added a liquid-phase carbon source injector temperature control device or a liquid-phase carbon source injector atomization device in the continuous carbon nanotube fiber preparation device to improve the uniformity and stability of carbon source injection, But at the same time, it increases the complexity of the device and the production cost

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