冷等离子处理对炭纤维表面及复合材料性能的影响

空气气氛下对T300炭纤维进行不同时间的等离子处理。对处理后的炭纤维表面进行了扫描电镜(SEM)观察,对表面活性基团进行了红外光谱测试。结果显示,随着处理时间的增长,纤维表面沟槽长度加长,程度加深,表面粗糙度增大。纤维表面并没有明显的活性基团产生。将处理后的炭纤维制备成单向增强板,测得试样的弯曲模量达到109GPa;弯曲强度在处理时间为16min之内增加较快达到1241.5MPa,超过16min之后开始下降。等离子处理前后的力学性能相比,弯曲模量提高了50.97%,弯曲强度提高了46.89%。实验结果显示,等离子处理16min能够得到比较好的界面结合性能和力学性能。

Effect of Air Cold Plasma Treatment on the Interfacial Properties and Mechanical Properties of Carbon Fiber Reinforced Epoxy Composites

T300 carbon fiber was treated by cold plasma in the air. Treatment time were 4 min,8 min,12 min,16 min,20 min. The chemical structure of surface and morphology of carbon fiber were characterized by rsing FT-IR and SEM respectively. After the surface treatment,the surface of the fiber become more rough,but there was no active groups introduced by the treatment. The composite material was reinforced by after-treat carbn fiber,and the mechanical properties were measured. The results show that the bending modul...