An analytical approach to determine coefficients of thermal expansion of CNT/polymer nanocomposites
An analytical approach to determine coefficients of thermal expansion of CNT/polymer nanocomposites
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DOI：
10.1177/0954406220920685
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发表时间：
2020-04-22
影响因子：
2
通讯作者：
Mondali, M.
中科院分区：
文献类型：
--
作者：
Abbasi, A.;Mondali, M.
在这项研究中，CNT/聚合物纳米复合材料的热机械性能进行了研究。采用半连续介质分析方法模拟碳纳米管增强聚合物的热行为。碳纳米管被建模在原子尺度，而聚合物被建模为连续体。界面效应或基体和CNT之间的货车Der Waals相互作用模拟采用内聚强度。结果表明，使用内聚定律的碳纳米管/聚合物界面可以提供非常接近的结果，可用的实验数据。此外，添加少量的碳纳米管到聚合物中导致聚合物基体的径向和轴向热膨胀系数略有下降，这取决于温度、体积分数、纵横比以及碳纳米管的直径。
In this study, thermo-mechanical properties of CNT/polymer nanocomposite were investigated. Semi-continuum analytical method was used to simulate thermal behavior of CNT-reinforced polymers. CNT was modeled in an atomistic scale, whereas polymer was modeled as a continuum. Interfacial effects or the Van Der Waals interactions between matrix and CNT were simulated employing cohesive strength. The results indicate that using the cohesive law for CNT/polymer interface could provide very close results to the available experimental data. Also, adding a small quantity of CNTs to polymer leads to a slight decrease in the radial and axial thermal expansion coefficients of polymer matrix depending on temperature, volume fraction, aspect ratio, and also diameter of CNTs.