Interaction of ZnO Nanowires with Carbon Fibers for Hierarchical Composites with High Interfacial Strength
Interaction of ZnO Nanowires with Carbon Fibers for Hierarchical Composites with High Interfacial Strength
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ZnO纳米线与碳纤维相互作用制备高界面强度多级复合材料
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
H. Sodano
中科院分区：
文献类型：
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作者：
Gregory J. Ehlert;Yirong Lin;Ulises Galan;H. Sodano
当生长在碳纤维表面时，垂直排列的氧化锌纳米线阵列被证明在不降低复合材料的面内性能的情况下提高了界面剪切强度。对断裂面的分析表明，氧化锌从碳纤维表面剥离出来，结合较高的界面剪切强度，表明氧化锌与碳表面的结合比环氧树脂与碳表面的结合更强。以前的工作无法确定增强氧化锌-碳纤维界面的特定化学相互作用，但它假设纤维上存在羧酸基团。在这项研究中，芳纶纤维被用来解释表面相互作用，因为它可以在没有羧酸的情况下产生，或者通过官能化与这些基团产生。模型纤维表明，只有带有羧酸基团的纤维才能从氧化锌纳米线获得更高的界面强度。结果表明，在碳纤维-氧化锌纳米线-环氧树脂复合材料中，氧化锌和羧酸基之间的相互作用是提高界面强度的关键。
When grown on the surface of carbon fiber, vertically aligned arrays of ZnO nanowires have been shown to increase the interfacial shear strength without decreasing the in-plane properties of the composite. Analysis of the failure surface indicates that the ZnO debonds from the carbon fiber which combined with the higher interfacial shear strength, indicates that the ZnO more strongly adheres to the carbon surface than epoxy adheres to the carbon surface. Previous work was unable to identify the specific chemical interaction that enhanced the ZnO — carbon fiber interface, however it hypothesized that the presence carboxylic acid groups on the fiber were responsible. In this study an aramid fiber is used to elucidate the surface interaction since it can be produced with no carboxylic acid or with these groups through functionalization. The model fiber demonstrates that only fibers with carboxylic acid groups experience increased interfacial strength from the ZnO nanowires. The interaction between ZnO and carboxylic acid groups is verified to be critical to the enhancement of the interfacial strength in carbon fiber — ZnO nanowire — epoxy composites.