Vertical continuous carbon nanotube fiber preparation device and preparation method

Abstract

The invention provides a vertical continuous carbon nanotube fiber preparation device, which includes a carbon source injector, a tube furnace and a collection box connected to the tube furnace, wherein the carbon source injector includes: carbon source injector pump; a carbon source injection pipe, one end of which is located in the tube furnace; a carbon source transport pipe, connected to the carbon source injection pump and the carbon source injection pipe; a restrictor, arranged between the carbon source transport pipe and the carbon source injection pipe; Between the carbon source injection pipes; the carbon source injection pump injects the liquid phase carbon source into the tube furnace through the carbon source transport pipe and the carbon source injection pipe, and in the carbon source injection pipe A carbon source injection tube core is provided, one end of the carbon source injection tube core is set in the restrictor, and the other end of the carbon source injection tube core protrudes out of the carbon source injection tube. Compared with the prior art, the invention adopts the carbon source injector with simple structure and low cost to realize the uniform injection and gasification of the carbon liquid phase carbon source, and finally achieves the purpose of stable and continuous preparation of carbon nanotube fibers.

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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