Preparing method of flexible carbon nanotube/metal composite film applied to electromagnetic shielding field

Abstract

The invention relates to a preparing method of a flexible carbon nanotube/metal composite film applied to the electromagnetic shielding field, and relates to a method for improving the existing nanotube film electromagnetic shielding effectiveness by growing metal particles on the carbon nanotube film surface. The preparing method sequentially comprises the following steps that firstly, the surface morphology of the carbon nanotube film is constructed; secondly, electrodeposition liquid is prepared; thirdly, a cathode deposition component is assembled; and fourthly, the metal particles are grown on the surface of the carbon nanotube film. The carbon nanotube film obtained by the method has high conductivity, excellent flexibility and light weight, and the adopted method and equipment are simple, cost is low, pollution is avoided, repeated use can be achieved, and the electrodeposition process can achieve the characteristics of industrialization and the like.

Description

technical field [0001] The invention relates to a method for growing metal particles on the surface of a carbon nanotube film to improve the electromagnetic shielding efficiency of the existing carbon nanotube film. Background technique [0002] With the rapid development of modern science and technology, the emergence of the Internet has made electronic devices more and more widely used in people's lives, and even become an indispensable part of life, such as smart bracelets, mobile phones, computers, etc. However, while electronic devices bring convenience to people's lives, the accompanying electromagnetic interference (EMI) has become another major new source of environmental pollution after noise pollution, air pollution, and water pollution. Eliminating the impact of electromagnetic waves on human life has become an important research topic, especially the rapid rise of wearable electronic devices, which puts forward higher requirements for shielding materials. Theref...

AI Technical Summary

Problems solved by technology

However, carbon nanotubes have hydrophobic properties, especially in the macroscopic carbon nanotube film, which makes it difficult for the commonly used aqueous electrodeposition solution to wet carbon nanotubes and their film materials, and the metal cations in the electrodeposition solution The resistance of deposition on the surface of carbon nanotube film is relatively high, so it is difficult to effectively obtain metal particle deposition

Although the electrodeposition process of some metals can use non-aqueous ion electrodeposition liquid, but the price of this type of electrodeposition liquid is relatively high, and the production cost will be greatly increased.

In addition, the surface of the carbon nanotube film is irregular in the microstructure, which will cause the uneven distribution of the current, which directly leads to the uneven distribution of the deposited metal.

In summary, conventional electrodeposition methods are difficult to effectively and uniformly grow metal particles on the surface of carbon nanotube films.

Images