Catalyst slurry for cnts preparation and method for preparing cnts on different fiber substrates

Abstract

The present invention relates to a process for preparing catalyst slurry and a method for the preparation of CNTs CNTs on a substrate different fibers. High activity catalyst nanoparticles of iron, cobalt, nickel catalysts, nano ceramic powder as dispersant, using an ultrasonic dispersion method the catalyst slurry; required for drying after impregnation of the base material; using a low temperature CVD method to achieve rapid growth of CNTs. Advantage of the present invention: enrobed implemented method using a catalyst effective to uniformly load the fiber surface in combination with a low temperature CVD process for controlled short CNTs grown morphology, structure, and uniformly dispersed. Resin addition process also provides a CVD growth of CNTs more adequate carbon source. CVD growth of short low-temperature, high temperature can reduce the damage to the fibers, micro- and nano achieve synergistic enhancement and increased functionality.

Description

technical field [0001] The invention belongs to a low-temperature short-time controllable CVD CNTs growth process, in particular to a catalyst slurry used for CNTs preparation and a method for preparing CNTs on different fiber substrates. Background technique [0002] Carbon nanotubes have low density, large specific surface area, good thermal conductivity and excellent mechanical properties, and have been successfully used in many fields such as mechanical enhancement, electrochemical devices, field emission, shielding and absorbing materials. However, there are still many problems in how to realize the preparation of carbon nanotube composites at low cost, in large quantities, in large sizes, and in complex shapes, and how to make the excellent properties of microscopic carbon nanotubes macroscopic. Continuous fiber, with good mechanical properties and easy formability, has become the most commonly used reinforcement in composite materials. Considering the advantages of c...

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Problems solved by technology

[0005] However, these methods have their own problems: the PVD process sputters only on the surface, and for fiber substrates with curvature, it is difficult to take into account the curved surface and enter the interior of the fiber; the atomic layer deposition method uses complicated materials and expensive equipment, and is not suitable for mass production ; The reaction temperature of the floating catalytic process is mostly concentrated in the high temperature zone of 750 ° C ~ 850 ° C, which will cause certain damage to the fiber strength; the method of slurry impregnation is simple and easy, suitable for mass production, but there is uneven distribution of catalysts , the concentration is difficult to control and many other difficulties

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