Apparatus and method for improving the hydrophilicity of aramid fibers by uniform discharge at atmospheric pressure

Abstract

The invention provides an apparatus and method for improving the hydrophilicity of an aramid fiber by using homogeneous atmospheric-pressure discharge, belonging to the technical field of atmospheric low temperature plasma. The apparatus comprises a bipolar nanosecond pulse power supply (1), a wire-to-plate electrode, an electrical measuring system, a spectral measurement system and an aramid fiber fabric treating device. The bipolar nanosecond pulse power supply (1) drives the wire-to-plate electrode to undergo dielectric barrier discharge; the characteristics of discharge plasma are analyzed by using the electrical measuring system and the spectral measurement system; discharge parameters are changed to obtain uniform discharge plasma; and the apparatus and method are used for treating an aramid fiber fabric (7) and reducing the water contact angle of the aramid fiber fabric (7).

Description

technical field [0001] The device and method for improving the hydrophilicity of aramid fiber cloth by using atmospheric pressure uniform discharge belong to the field of plasma technology, in particular, it relates to a device and method that is driven by a bipolar high-voltage nanosecond pulse power supply under the structure of a large-scale wire-plate electrode, and is driven by a bipolar high-voltage nanosecond pulse power supply in an atmospheric pressure environment. Obtain a large-area low-uniform discharge device, and use discharge plasma to treat aramid cloth to improve its hydrophilicity. Background technique [0002] The full name of aramid cloth is "poly-p-phenylene terephthalamide". It is a new type of chain polymer composite material with the characteristics of high crystallization, high strength, high modulus and high temperature resistance. It is widely used in industries such as aviation, aerospace, automobile and shipbuilding. However, the surface of aram...

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Problems solved by technology

[0005] Patent CN104853513A provides a large-area uniform dielectric barrier discharge device with a tubular electrode structure, which can generate large-area uniform plasma under atmospheric pressure, but this discharge requires a pure nitrogen environment to generate uniform discharge, and the cost of use High, which affects its application in industry

Patent CN104831519A solves the problem of treating yarn materials through dielectric barrier discharge under atmospheric pressure, but the tubular electrode structure it uses can only process a single fiber, which has low efficiency, and the discharge mode is filamentary discharge, which will cause ablation on the surface of the material , piercing and other damage, so the practical application range is greatly limited

Patent CN104694733A uses plasma discharge to treat metal surfaces. This patent uses nanosecond pulse dielectric barrier discharge to obtain uniform plasma. In the patent, high-voltage electrodes and ground electrodes are arranged alternately, which is more conducive to forming volume discharge rather than surface discharge, which is not suitable for Treatment of textiles such as aramid cloth

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