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作者采用经典化学分析法、x射线光电子能谱分析法,研究了碳纤维经氧冷等离子体处理前后表面酸性基团的变化。化学分析结果表明,碳纤维表面酸性基团增加了3.4倍;x射线光电子能谱分析结果表明,碳纤维表面O/C原子比提高1倍,冷等离子体处理条件如处理时间、气体流量、压力及输出功率等对碳纤维表面酸性基团的变化有重大的影响。根据分析结果,还探讨了氧冷等离子体氧化碳纤维表面的反应机理及其表面化学结构的变化规律。作者认为,碳纤维表面处理所产生的酸性基团,是提高碳纤维增强树脂复合材料的层间剪切强度的一个重要因素。
The authors used classical chemical analysis and X-ray photoelectron spectroscopy to study the changes of acid groups on the surface of carbon fibers before and after oxygen-cooled plasma treatment. The results of chemical analysis showed that the acid groups on the surface of carbon fibers increased 3.4-fold. The results of x-ray photoelectron spectroscopy showed that the atomic O / C ratio of carbon fibers increased 1 time. The conditions of cold plasma treatment such as treatment time, gas flow rate, pressure and output Power and so on carbon fiber surface acid groups have a significant impact on changes. According to the analysis results, the reaction mechanism of oxygen-cooled plasma on the surface of carbon fiber and the variation of its chemical structure on the surface were also discussed. The authors believe that the acid groups generated by carbon fiber surface treatment are an important factor in increasing the interlaminar shear strength of carbon fiber reinforced resin composites.