Device and method for continuously processing fiber surface by atmospheric low temperature radio frequency plasma

Abstract

The invention relates to a device and method for continuously processing a fiber surface by atmospheric low temperature radio frequency plasma. The device comprises a tube body, and a first ceramic tube arranged in the tube body by support connection blocks arranged at the two ends and the middle of the tube body. The support connection blocks at the two ends of the tube body are provided with a second ceramic tube inside, the second ceramic tube communicates with the first ceramic tube, one electrode is arranged on each of the two sides of the first ceramic tube, and one of the support connection blocks at the two ends of the tube body is provided with a gas inlet tube in communication with the second ceramic tube. One of the two electrodes is grounded while the other one is connected to high voltage. The outer wall of the tube body is grounded. In the method, a fiber bundle passes through the first ceramic tube, and the electrode is applied with voltage to form a discharge plasma region inside the first ceramic tube so as to process the surface of the fiber. The invention can generate uniform and stable low-temperature plasma to remarkably improve the fiber surface structure and performance.

Description

technical field [0001] The invention relates to the technical field of fiber surface treatment, in particular to a device and method for continuously treating fiber surface with atmospheric pressure low-temperature radio frequency plasma. Background technique [0002] Fiber-reinforced composite material is a material that is very meaningful and has broad development prospects today. It has the characteristics of high strength and light weight, and is widely used in high-tech fields such as aviation, aerospace and national defense, as well as civilian industries. Fibers used as reinforcing materials are high-performance fibers with advantages such as high strength, high modulus, and high elasticity, such as carbon fibers, high-strength high-modulus polyethylene (UHMWPE) fibers, aramid fibers, and polyparaphenylenebenzobisoxazole (PBO) fibers. However, most high-performance fibers have smooth surfaces, low chemical reactivity, and poor adhesion and wettability to the resin mat...

AI Technical Summary

Problems solved by technology

At present, the method of performing atmospheric pressure plasma treatment on fibers is mainly in the form of flat plate electrode discharge. This method can realize large-area discharge, but there are the following problems in continuous treatment: 1) The discharge device has a large volume and occupies a large space. At the same time, a high-flow working gas is required to maintain the stability of the discharge, which increases the consumption of gas; 2) The length of the discharge area is short, resulting in a slow plasma processing speed during continuous processing and insufficient energy utilization; 3) In order to reduce the temperature of the device , most of the devices need water-cooling devices, which increases the complexity and cost of the device

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