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碳纳米管浸润剂对碳纤维/环氧树脂界面性能的影响

, PP. 17-22

Keywords: 碳纳米管,浸润剂,碳纤维/环氧树脂复合材料,界面,单丝断裂法

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Abstract:

制备了含碳纳米管(CNTs)的水溶液,将该水溶液作为浸润剂浸渍碳纤维并进行烘干,采用扫描电镜(SEM)和原子力显微镜(AFM)研究了CNTs含量及浸润工艺对碳纤维表面CNTs分布的影响,运用单丝断裂法分析了CNTs浸润剂处理对碳纤维/环氧树脂界面粘结性能的影响和作用机制。结果表明:CNTs可在T700和T300纤维表面黏附,浸润剂中CNTs含量越高,CNTs在纤维表面含量越高;对于CNTs含量较低的浸润剂,采用增加浸润次数的方法,能有效提高碳纤维表面CNTs的含量和碳纤维表面粗糙度;经过CNTs浸润剂处理后,碳纤维/树脂界面处的机械啮合作用增强,界面粘结强度明显提高,增幅最高达35.8%。

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