Interfacial enhancement of carbon fiber composites by poly(amido amine) functionalization
Interfacial enhancement of carbon fiber composites by poly(amido amine) functionalization
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DOI：
10.1016/j.compscitech.2012.10.005
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发表时间：
2013-01-24
影响因子：
9.1
通讯作者：
Du, Shanyi
中科院分区：
文献类型：
--
作者：
Peng, Qingyu;Li, Yibin;Du, Shanyi
碳纤维增强复合材料因其优异的力学性能而受到越来越多的关注。然而，由于碳纤维与大多数聚合物基体不具有良好的润湿性和吸附性，这不能有效地将载荷从基体传递到纤维，因此界面往往是薄弱的。本文提出了一种利用聚酰胺-胺（PAMAM）对碳纤维进行化学功能化的方法。酸处理CF和PAMAM之间的化学键的形成被证实。PAMAM功能化没有改变CF的表面形貌，但显著提高了CF表面的润湿性。与未官能化的相比，界面剪切强度提高了85%。并对界面增强机理进行了探讨。(c)2012爱思唯尔有限公司保留所有权利。
Carbon fiber reinforced composites have stimulated increasing attention due to their excellent mechanical properties. However, the interface tends to be weak because carbon fiber does not naturally have a good wettability and adsorption with most polymers matrix, which could not effectively transfer the load from the matrix to the fibers. Here we proposed to chemically functionalize carbon fiber (CF) by poly(amido amine) (PAMAM), which has more concentration of amino groups than traditional coupling agents. The chemical bond formation between acid-treated CF and PAMAM was confirmed. The PAMAM functionalization did not change the surface morphology while significantly increased the wettability of CF surface. The interfacial shear strength has an increase of 85% compared to that without functionalization. The interfacial enhancement mechanism was also explored in details. (c) 2012 Elsevier Ltd. All rights reserved.