The role of grafting force and surface wettability in interfacial enhancement of carbon nanotube/carbon fiber hierarchical composites
The role of grafting force and surface wettability in interfacial enhancement of carbon nanotube/carbon fiber hierarchical composites
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DOI：
10.1016/j.carbon.2013.12.020
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发表时间：
2014-04
期刊：
影响因子：
10.9
通讯作者：
Chao Wang;Yibin Li;L. Tong;Q. Song;Kezhi Li;Jianjun Li;Qingyu Peng;Xiaodong He;Rongguo Wang-Rongguo
中科院分区：
文献类型：
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作者：
Chao Wang;Yibin Li;L. Tong;Q. Song;Kezhi Li;Jianjun Li;Qingyu Peng;Xiaodong He;Rongguo Wang-Rongguo
采用化学气相沉积法（CVD）制备了碳纳米管（CNT）/碳纤维（CF）增强体，并对其表面的润湿性和CNT在CF上的接枝力进行了实验研究。然后从实验和理论上研究了它们对界面改善的影响。结果表明，碳纳米管/碳纤维的接枝力很强，可达5 μN以上，碳纳米管/碳纤维的附着能维持碳纳米管的断裂。这将有助于改善界面性能。然而，沉积的催化剂恶化的润湿性，这可能会严重降低界面性能。结果表明，分级CNT/CF增强复合材料的界面剪切强度仅比原始CF增强复合材料的界面剪切强度提高了30%。建立了碳纳米管/碳纤维接枝力对界面改善作用的理论模型，预测结果与实验结果吻合较好。
The grafting force of carbon nanotube (CNT) on carbon fiber (CF) and the wettability of CF surface were experimentally studied, where hierarchical CNT/CF reinforcement was prepared using chemical vapor deposition (CVD). Then, their effects on interfacial improvement were experimentally and theoretically investigated. The results show that the CNT/CF grafting force is so strong, more than 5 μN, and CNT/CF attachment can sustain the fracture of the CNTs. This is expected to be contributed to the improvement of interfacial properties. However, the deposited catalyst deteriorates the wettability, which could seriously degrade the interfacial properties. As a result, experimental results from the micro-droplet test show that there is only a 30% increase in the interfacial shear strength of hierarchical CNT/CF reinforced composite comparing with that of as-received CF reinforced composite. An analytical model was developed to predict the effects of CNT/CF grafting force on interfacial improvement, and the predicted results are in agreement with the experimental one.