Method for performing surface modification on inner wall and outer wall of tube by adopting atmospheric-pressure plasma

Abstract

The invention provides a method for performing surface modification on the inner wall and the outer wall of a tube by adopting atmospheric-pressure plasma and belongs to the technical field of surface treatment of plasma materials. The method comprises the steps that produced plasma jet is applied to the surface of a to-be-processed tubular material, working gas is introduced into the to-be-processed tubular material, and plasma is formed in the to-be-processed tubular material; the plasma jet performs surface modification on the outer wall of the to-be-processed tubular material; meanwhile, an electric field for ionizing the working gas in the to-be-processed tubular material is provided, so that the plasma is generated in the tube and realizes surface modification on the inner wall of the to-be-processed tubular material; when the to-be-processed tubular material performs rotating and feeding motion in the axial direction, surface modification on the inner wall and the outer wall of the tubular material with any length can be realized. According to the method, complicated vacuum equipment is not needed, simultaneous modification of the inner wall and the outer wall of the tube with any length is realized by controlling motion of the processed tube, the cost is low, the operation is simple and flexible, environmental pollution is avoided, and the method for surface modification is environment-friendly.

Description

technical field [0001] The invention relates to a method for simultaneously modifying the surface of the inner wall and the outer wall of a tubular material by atmospheric pressure plasma, and belongs to the technical field of plasma material surface treatment. Background technique [0002] Wettability is one of the important properties of the surface of materials, and the poor surface wettability of many materials affects its biocompatibility, adhesion, etc. A variety of methods have been used to improve the surface wettability of materials, such as wet chemical method, laser treatment, ultraviolet treatment and plasma treatment, etc. Among them, plasma surface treatment technology is favored because of its small impact on the substrate material and environmental friendliness. Widespread concern. The invention patents with publication numbers CN1526753A, CN1900408A, and CN202318981U all provide devices and methods for surface modification of materials using plasma. Howeve...

AI Technical Summary

Problems solved by technology

However, these two methods can only modify the surface of the inner wall of the tube, and at the same time, the length of the tube that can be modified is limited due to the limited plasma discharge intensity or the penetration length of the plasma jet.

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