Title |
Multi-scale numerical simulations of thermal expansion properties of CNT-reinforced nanocomposites
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Published in |
Discover Nano, January 2013
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DOI | 10.1186/1556-276x-8-15 |
Pubmed ID | |
Authors |
Alamusi, Ning Hu, Jianhui Qiu, Yuan Li, Christiana Chang, Satoshi Atobe, Hisao Fukunaga, Yaolu Liu, Huiming Ning, Liangke Wu, Jinhua Li, Weifeng Yuan, Tomonori Watanabe, Cheng Yan, Yajun Zhang |
Abstract |
In this work, the thermal expansion properties of carbon nanotube (CNT)-reinforced nanocomposites with CNT content ranging from 1 to 15 wt% were evaluated using a multi-scale numerical approach, in which the effects of two parameters, i.e., temperature and CNT content, were investigated extensively. For all CNT contents, the obtained results clearly revealed that within a wide low-temperature range (30°C ~ 62°C), thermal contraction is observed, while thermal expansion occurs in a high-temperature range (62°C ~ 120°C). It was found that at any specified CNT content, the thermal expansion properties vary with temperature - as temperature increases, the thermal expansion rate increases linearly. However, at a specified temperature, the absolute value of the thermal expansion rate decreases nonlinearly as the CNT content increases. Moreover, the results provided by the present multi-scale numerical model were in good agreement with those obtained from the corresponding theoretical analyses and experimental measurements in this work, which indicates that this multi-scale numerical approach provides a powerful tool to evaluate the thermal expansion properties of any type of CNT/polymer nanocomposites and therefore promotes the understanding on the thermal behaviors of CNT/polymer nanocomposites for their applications in temperature sensors, nanoelectronics devices, etc. |
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