二氧化硅纳米颗粒对碳纤维与环氧树脂基体粘合强度的增强

被引：15

作者：

蒋震宇 ^{[1
]}

张晖 ^{[2
]}

刘生 ^{[2
]}

张忠 ^{[2
]}

机构：

[1] Institute for Composite Materials,University of Kaiserslautern,Erwin-Schroedinger Str, Kaiserslautern,Germany

[2] 国家纳米中心

来源：

实验力学 | 2007年 / Z1期

关键词：

高分子复合材料; 碳纤维; 粘合强度; 纳米颗粒; 断裂韧性;

D O I：

暂无

中图分类号：

TQ320.1 [基础理论];

学科分类号：

0805 ; 080502 ;

摘要：

纤维与基体的粘合强度是决定纤维增强高分子复合材料性能的关键因素。本文采用横向纤维束拉伸实验的方法研究了碳纤维与经过纳米颗粒改性的环氧树脂基体间的粘合强度。平均直径为25纳米的二氧化硅纳米颗粒用特殊的溶胶-凝胶法引入环氧基体(由Hanse ChemieAG提供) ,可以达到很高的含量,同时保持较为理想的分散状态。实验结果表明,二氧化硅纳米颗粒对于碳纤维与改性环氧基体的粘合强度有显著的增强效应。当纳米颗粒含量为14 vol .%时,横向纤维束拉伸的断裂强度相比纯环氧基体提高了104 %。通过对横向纤维束拉伸样品断裂面的扫描电镜观察,以及二氧化硅纳米颗粒改性环氧树脂基体材料的力学性质的测量,可以发现横向纤维束拉伸的断裂强度与改性环氧基体本身的断裂韧性之间存在良好的相关性。由此可推测纳米颗粒对环氧树脂基体材料的增韧是碳纤维与基体间界面增强的一个重要原因。

引用

页码：359 / 366

页数：8

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