EFFECT OF THE CNT GROWTH TEMPERATURE ON THE TENSILE STRENGTH OF CARBON FIBER
EFFECT OF THE CNT GROWTH TEMPERATURE ON THE TENSILE STRENGTH OF CARBON FIBER
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DOI：
10.2495/mc170281
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发表时间：
2017-06
期刊：
影响因子：
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通讯作者：
Kazuto Tanaka;Y. Hinoue;Y. Okumura;T. Katayama
中科院分区：
文献类型：
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作者：
Kazuto Tanaka;Y. Hinoue;Y. Okumura;T. Katayama
碳纤维增强塑料（CFRP）由于其高比刚度和高比强度的机械性能而被期望用于汽车和飞机的结构部件。研究表明，碳纤维表面接枝碳纳米管（CNTs）可以改善纤维与基体的界面性能，对碳纤维增强复合材料的力学性能有重要影响。另一方面，使用化学气相沉积（CVD）方法接枝CNT有时会削弱碳纤维的拉伸强度。特别地，当生长温度相对高时，纤维降解是显著的。在这项研究中，碳纳米管接枝在碳纤维上的生长温度从550至700 ° C使用镍作为催化剂，并通过单纤维拉伸试验测量其拉伸强度。结果表明，化学气相沉积工艺，特别是高温热处理，加速了催化剂在碳纤维中的扩散，降低了纤维的强度。当生长温度相对较低（550 - 600 ° C）时，CNT接枝的碳纤维的拉伸强度没有降低。
Carbon fiber reinforced plastics (CFRPs) are expected to be used for the structural parts of automobiles and aircrafts due to their mechanical properties, including high specific stiffness and high specific strength. It was reported that grafting of carbon nanotubes (CNTs) on the carbon fiber can improve the fiber matrix interfacial property, which plays an important role in the mechanical behavior of CFRP. On the other hand, grafting CNTs using the chemical vapor deposition (CVD) method sometimes weakens the tensile strengths of carbon fibers. In particular, when the growth temperature is relatively high, the fiber degradation is remarkable. In this study, CNTs were grafted on carbon fibers at growth temperatures from 550 to 700°C using Ni as the catalyst, and their tensile strengths were measured by single fiber tensile tests. The results indicated that the CVD processes, especially the higher temperature heat-treatment, accelerate the diffusion of catalysts into carbon fibers, and degrade the fiber strength. When the growth temperature was relatively low (550–600°C), there was no degradation of tensile strength for CNT grafted carbon fibers.