刘新,张忠涛,刘吉宇,沈海洋,关乃侨,周瑜阳,陈发泽.混氧等离子体射流对CFRP表面性质及粘接强度的影响[J].表面技术,2022,51(1):247-256.
LIU Xin,ZHANG Zhong-tao,LIU Ji-yu,SHEN Hai-yang,GUAN Nai-qiao,ZHOU Yu-yang,CHEN Fa-ze.Effect of Helium/Oxygen Mixed Plasma Jet on CFRP Surface Properties and Bonding Strength[J].Surface Technology,2022,51(1):247-256 |
| 混氧等离子体射流对CFRP表面性质及粘接强度的影响 |
| Effect of Helium/Oxygen Mixed Plasma Jet on CFRP Surface Properties and Bonding Strength |
| 投稿时间：2021-03-05 修订日期：2021-05-09 |
| DOI：10.16490/j.cnki.issn.1001-3660.2022.01.026 |
| 中文关键词: 碳纤维复合材料 大气压等离子体射流 氦氧等离子体 粘接强度 表面改性 |
| 英文关键词:carbon fiber reinforced polymer plasma jet helium/oxygen plasma bonding strength surface modification |
| 基金项目:国家自然科学基金面上项目(51975092);中央高校基本科研业务费项目(DUT18JC19);天津市自然科学基金(19JCQNJC03900);博士后创新人才支持计划(BX20190233);博士后科学基金(2019M661012) |
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| Author | Institution |
| LIU Xin | School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China |
| ZHANG Zhong-tao | School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China |
| LIU Ji-yu | School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China |
| SHEN Hai-yang | School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China |
| GUAN Nai-qiao | School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China |
| ZHOU Yu-yang | School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China |
| CHEN Fa-ze | School of Mechanical Engineering, Tianjin University, Tianjin 300350, China |
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| 中文摘要: |
| 目的 探究不同氧气含量下大气压混氧等离子体射流特性，分析其对碳纤维复合材料(CFRP)表面理化性质的影响，研究其改善表面浸润性及粘接强度的机理。方法 采用大气压介质阻挡放电(DBD)，产生氦氧混合等离子体射流，对CFRP表面进行处理，研究了不同氧气体积分数射流对CFRP表面的作用效果，确定了相对较佳的氧气体积分数。借助接触角测量仪、扫描电子显微镜(SEM)、原子力显微镜(AFM)和X射线光电子能谱仪(XPS)等表面分析手段，对处理前后CFRP表面的润湿性、微观形貌、粗糙度和化学成分等进行测试分析。采用环氧树脂胶粘剂，分别对射流处理前后的CFRP与铝合金表面进行粘接，并测试不同表面的粘接强度。结果 随着氧气体积分数的增加，射流长度变短，温度逐渐下降。氧气处理所得表面的浸润性相比未混氧射流处理所得表面的浸润性明显提高。当氧气体积分数为0.75%时，所得表面浸润性相对最好。与纯氦等离子体射流相比，混氧射流处理后，表面环氧树脂铺展速率更高，说明表面对胶粘剂的亲和性相对较好，所得表面粗糙度也相对更低。XPS测试结果表明，混氧射流处理所得表面含氧官能团含量更高，表面能相对较高，故表面润湿性较好。结论 当氧气体积分数为0.75%时，混氧射流可更好地改善CFRP表面的浸润性，表面接触角由15.2°减小至接近0°，所得表面更平整，粘接强度相比未处理表面可提升约429.1%。 |
| 英文摘要: |
| This work aims to investigate the characteristics of atmospheric pressure helium/oxygen mixed plasma jet with different oxygen content to analyze their effects on the surface physical and chemical properties of carbon fiber composites (CFRP) and study the mechanism of improving the surface wettability and bonding strength. The surface of CFRP was treated by helium/oxygen mixed plasma jets produced by the atmospheric pressure dielectric barrier discharge (DBD) to study the effect of different oxygen content on CFRP surface, thus determining the relatively better oxygen volume fraction. By means of contact angle measuring instrument, scanning electron microscope (SEM), atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS), the surface wettability, micro-morphology, roughness and chemical composition before and after helium/oxygen mixed plasma jets treatment were measured and analyzed. Epoxy resin adhesive was used to bond CFRP and aluminum alloy surfaces before and after helium/oxygen mixed plasma jets treatment, and the bonding strength of different surfaces was tested. With the increase of oxygen volume fraction, the jet length and temperature decreased gradually; after oxygen was mixed, the CFRP surfaces with better wettability were obtained; when the oxygen volume fraction was 0.75%, the wettability was relatively optimum. Compared with pure helium plasma jet, the spreading rate of epoxy resin on the surface treated by helium/oxygen mixed plasma was higher, which indicated that the surface has better affinity for adhesive and its roughness also reduces. XPS results showed that the surface treated by helium/oxygen mixed plasma had higher oxygen- containing functional group content and higher surface energy, thus the surface wettability was better. When the oxygen volume fraction is 0.75%, the helium/oxygen mixed plasma jet can improve the surface wettability of CFRP, the surface contact angle decreases from 15.2° to 0°; the surface is smoother and the bonding strength increases by about 429.1% compared to the untreated surface. |
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