Characterization of the interphase in carbon fiber/polymer composites using a nanoscale dynamic mechanical imaging technique
Characterization of the interphase in carbon fiber/polymer composites using a nanoscale dynamic mechanical imaging technique
复制标题
使用纳米级动态机械成像技术表征碳纤维/聚合物复合材料中的界面
DOI：
10.1016/j.carbon.2010.05.008
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发表时间：
2010-09-01
期刊：
影响因子：
10.9
通讯作者：
Zhang, Zuoguang
中科院分区：
文献类型：
--
作者：
Gu, Yizhuo;Li, Min;Zhang, Zuoguang
纤维增强聚合物复合材料的界面是纤维周围的一个狭窄区域，复合材料的力学性能在很大程度上取决于界面的性质。碳纤维增强聚合物复合材料（CFRPs）的界面相由于其纳米尺度而难以定量表征。为了解决这个问题，我们提出了一种纳米力学成像技术，用于映射碳纤维复合材料中的界面区域周围的动态力学性能，并提供界面尺寸的纳米级信息。实验结果表明，该方法可以根据复合材料横截面上的储能模量分布，以纳米级的横向分辨率确定界面相的宽度和形貌。T300碳纤维/环氧树脂复合材料和T700碳纤维/双马来酰亚胺树脂复合材料的平均界面厚度分别为118 nm和163 nm，界面尺寸呈“河流状”且宽度不均匀，与碳纤维表面形貌一致。此外，利用原位成像技术分析了水老化对T300/环氧复合材料界面的影响。界面宽度和界面脱粘的增加被揭示，意味着在界面区域的退化。(C)2010爱思唯尔有限公司保留所有权利。
The interphase of fiber reinforced polymer composites is a narrow region around the fiber, and the mechanical performance of a composite strongly depends on the properties of the interphase. The interphase of carbon fiber reinforced polymer composites (CFRPs) is difficult to quantitatively characterize because of its nanometer dimension. To solve this problem, we present a nanomechanical imaging technique for mapping the dynamic mechanical property around the interphase region in CFRPs, and for providing nanoscale information of the interfacial dimension. The experimental results show that this method can determine the width and topography of the interphase with nanoscale lateral resolution, based on the storage modulus profile on the cross section of the composite. The average interphase thicknesses of a T300 carbon fiber/epoxy resin composite and a T700 carbon fiber/bismaleimide resin composite are 118 nm and 163 nm, respectively, and the size of interphase is uneven in width and "river-like", which is consistent with the surface topography of the carbon fibers. Furthermore, the effect of water-aging on the interphase of the T300/epoxy composite was analyzed using the in situ imaging technique. An increase in the interphase width and interface debonding were revealed, implying a degradation in the interphase region. (C) 2010 Elsevier Ltd. All rights reserved.