| 引用本文: | 万俊豪,但敏,黄佳俊,唐国庆,黄熠,金凡亚.等离子体处理对CFRP筒状件内壁活化效果的影响∗[J].中国表面工程,2023,36(6):178~185 |
| WAN Junhao,DAN Min,HUANG Jiajun,TANG Guoqing,HUANG Yi,JIN Fanya.Plasma Treatment on the Activation Effect of the Inner Wall of CFRP Cylindrical Parts[J].China Surface Engineering,2023,36(6):178~185 |
|
| |
|
|
| 本文已被：浏览 376次 下载 260次 |
码上扫一扫！ |
|
|
| 等离子体处理对CFRP筒状件内壁活化效果的影响∗ |
|
万俊豪, 但敏, 黄佳俊, 唐国庆, 黄熠, 金凡亚
|
|
核工业西南物理研究院 成都 610207
|
|
| 摘要: |
| 为解决碳纤维增强树脂基复合材料（CFRP）筒状件内壁表面化学惰性较高导致与金属涂层结合强度差的问题，采用射频辉光放电对其内表面进行活化处理来提高其表面活性。通过接触角测试和红外光谱分析，探究等离子体处理气压、射频电源功率、处理时间和离子种类对活化效果的影响。结果表明，经射频辉光放电等离子体处理后 CFRP 筒状件内壁表面等离子体活化效果明显，表面能显著提高。其他工艺参数相同情况下，活化效果随气压增大先提升后降低，随射频电源功率和处理时间的增大而提高，以氧等离子体活化效果最佳。其中，在处理气压 0.5 Pa、射频电源功率 500 W、处理时间 60 min、氧等离子体条件下效果最为显著，水和二碘甲烷的接触角分别由 71.29°、49.36°降低到 4.93°、5.39°，表面能从 38.85 mJ·m?2 提升到 74.73 mJ·m?2 。通过红外光谱分析，经等离子体处理后的 CFRP 中 C-H 和 C≡C 等非活性键被打断，带有 C=O 的醛基和羧基活性基团增多，浸润性大幅提高。活化后的 CFRP 基体与金属薄膜的膜基结合力由不足 0.1 MPa 提升至 0.49 MPa。研究通过射频辉光放电对 CFRP 筒状件内壁表面进行活化处理，为制备高结合强度的金属涂层打下基础。 |
| 关键词: 复合材料 筒状件内壁 射频辉光放电 等离子体活化 表面能 |
| DOI：10.11933/j.issn.1007-9289.20230317001 |
| 分类号:TG17；TB332 |
| 基金项目:国防重点实验室基金资助项目（SYSKFJ2022） |
|
| Plasma Treatment on the Activation Effect of the Inner Wall of CFRP Cylindrical Parts |
|
WAN Junhao, DAN Min, HUANG Jiajun, TANG Guoqing, HUANG Yi, JIN Fanya
|
|
Southwestern Institute of Physics, Chengdu 610207 , China
|
| Abstract: |
| To improve the corrosion resistance of the inner walls of carbon fiber-reinforced plastic (CFRP) cylindrical components to special gases, metal coatings can be applied to their inner surfaces. However, carbon-fiber composite surfaces exhibit high chemical inertness, low catalytic activity, and low bonding strength with metal atoms. To address this, the surface of the CFRP matrix undergoes plasma activation prior to coating with the aim of improving the bonding strength between the matrix and the metal coating. By increasing the chemical activity of the CFRP inner-wall surface, an ideal interfacial morphology is obtained, forming the basis for creating high-performance metallized coatings on the surface. Prior studies has successfully employed Hall ion source for activating planar CFRP materials. However, this technological approach is not suitable for the plasma activation of the inner walls of cylindrical parts due to the size mismatch between the components and the Hall ion source. Plasma activation of the inner-wall surface of the cartridge is performed before the coating of the inner wall takes place, by replacing the power supply of the coating equipment with a radio frequency (RF) power supply and modifying the cartridge installation. An RF glow discharge is used to activate the CFRP inner-wall surface. A column electrode is inserted into the cylinder, with one end connected to the RF power supply and the other to the vacuum chamber. The vacuum chamber achieved a level of less than 3 mPa through the pumping system. The working gas is introduced until the desired air pressure is reached, and the RF power supply is activated to generate plasma by glow discharge, effectively activating the inner-wall surface of the cylindrical components. Post-activation, the RF power supply is replaced with a magnetron power supply. Argon gas is introduced to initiate magnetron sputtering, resulting in the application of a metal coating to the inner wall of the cylindrical component. The effects of the plasma treatment parameters on the activation process, including air pressure, discharge power, treatment time, and ion type, are investigated using contact angle tests and infrared spectral analysis. The results show that the plasma activation effect is evident on the inner-wall surface of the CFRP cylinder after the RF glow discharge plasma treatment. Consequently, the contact angle of both liquids on the CFRP substrate decreases significantly, while the surface energy and percentage of polar components increase significantly. Under identical process parameters, the activation effect initially increases and then decreases with rising air pressure, whereas it increases consistently with an increase in discharge power and treatment duration, with the most favorable results observed for oxygen plasma activation. The most significant effect is achieved when the parameters included a discharge pressure of 0.5 Pa, an RF discharge power of 500 W, a treatment duration of 60 min, and the use of oxygen plasma. Under these conditions, the contact angles for water and diiodomethane decrease substantially from 71.29°, 49.36°to 4.93° , 5.39°, respectively. The surface energy increases from 38.85 mJ·m?2 to 74.73 mJ·m?2 . The inactive bonds of the plasma-treated carbon fiber composites, including C-H and C≡C, are broken, the number of aldehyde and carboxyl groups with C=O increases, and the wettability is greatly improved. A comparison of the surface microscopic morphology before and after activation is performed using scanning electron microscopy (SEM). The impurity particles that have adhered to the carbon fiber surface and between the carbon fibers are completely removed, establishing favorable interfacial conditions, and thereby enhancing the bonding strength of the metal coating. The film-based bonding force between the activated CFRP substrate and the metal film increases from less than 0.1 MPa to 0.49 MPa. |
| Key words: composite materials inner wall of cylindrical parts RF glow discharge plasma activation surface energy |
|
|
|
|
