Study on atmospheric air glow discharge plasma generation and surface modification of carbon fiber fabric

Abstract

On the basis of a thin‐wire contact electrode structure, a nonuniform electric field is designed to realize diffuse discharge in atmospheric air. A new method of high‐efficiency treatment of carbon fiber fabrics by glow discharge plasmas at low discharge voltage is proposed. Through this method, carbon fiber fabrics are directly used as electrodes, the plasmas are directly formed on the surface, and a strong electric field region can be formed on the surface of carbon fiber fabrics. The high‐active plasmas generated in this study can not only introduce nitrogen functional groups that are difficult to be introduced by traditional air plasma treatment methods and a large number of oxygen functional groups on the surface of carbon fiber fabrics but also improve the surface roughness and wettability of the material. In addition, the important effects of surface electric field intensity and plasma treatment time on the modification effect were investigated. It lays a good technical foundation for the industrial application of carbon fiber surface modification with high efficiency and continuity in atmospheric air.

Advance in Using Plasma Technology for Modification or Fabrication of Carbon‐Based Materials and Their Applications in Environmental, Material, and Energy Fields

“…Some additives (such as ethanol (Figure 3B(c,d)) or pyridine) in air plasmas or electric fields activated by glow discharge plasmas can improve the degree of nitrogen atom incorporation into CBMs that are otherwise difficult to introduce using conventional air plasmas. [ 106,107 ]…”

“…Additionally, Zhao et al. [ 107 ] designed a nonuniform electric field to achieve diffuse discharge in an air‐glow discharge plasma. Through this treatment, carbon fiber fabrics were modified to work directly as electrodes, and in turn, electric fields generated on the carbon fiber fabric increased the number and energy of active species in air plasmas.…”

Rapid and Continuous Atmospheric Plasma Surface Modification of PAN-Based Carbon Fibers

“… 1 − 4 CFRPs have been widely adopted in aerospace, satellite, wind turbine, and sports equipment. 5 , 6 However, the surface of PAN-based carbon fibers (CFs) consists of graphitic crystalline structures and shows poor adhesion to resin matrix. 7 , 8 The outstanding mechanical properties of composites tend to depend on the strong interfacial bonding between fibers and matrix resin.…”

“…Carbon fiber reinforced plastic (CFRP) is well-known for its high specific strength, high modulus, superior thermal stability, and chemical resistance. − CFRPs have been widely adopted in aerospace, satellite, wind turbine, and sports equipment. , However, the surface of PAN-based carbon fibers (CFs) consists of graphitic crystalline structures and shows poor adhesion to resin matrix. , The outstanding mechanical properties of composites tend to depend on the strong interfacial bonding between fibers and matrix resin. , Surface modifications are an indispensable process to improve the surface polarity and binding energy of CFs . Traditional treatment methods can be classified into vapor-phase chemical oxidation, liquid-phase chemical oxidation − , and surface coating. − Ozone oxidation is an effective method to modify the surface of CFs, which takes advantage of the strong oxidizing property of ozone.…”

Study on water treatment effect of dispersion discharge plasma based on flowing water film electrode

“…In recent years, the low-temperature plasma generated by atmospheric air glow discharge has been widely studied in air purification, tail gas treatment, and material modification due to its good discharge dispersion, abundant active particles and appropriate power density [1][2][3][4]. With the deepening research on atmospheric pressure low-temperature plasma, plasma water treatment technology has attracted widespread attention of scholars at home and abroad [5][6][7].…”