Imbibition of polystyrene melts in aligned carbon nanotube arrays
Imbibition of polystyrene melts in aligned carbon nanotube arrays
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DOI：
10.1063/1.4793087
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发表时间：
2013-02-21
影响因子：
3.2
通讯作者：
Hugel, Thorsten
中科院分区：
文献类型：
--
作者：
Khaneft, Marina;Stuehn, Bernd;Hugel, Thorsten
我们分析了含有高度有序和垂直排列的碳纳米管（CNT）阵列的复合材料中的聚合物填充机制。碳纳米管是通过模板辅助化学气相沉积（CVD）方法获得的。研究了不同形式的阵列，在阵列的顶部和底部表面上有一层或两层碳层，或独立式碳纳米管。通过小角 X 射线散射 (SAXS) 结合电子显微镜（TEM 和 SEM）和原子力显微镜进行研究。管的长度为40μm，直径为40/90nm。模板的原始顺序仅局部保留在 CNT 数组中。聚合物的吸入是在碳纳米管内部以及碳纳米管之间实现的。它修改管的局部顺序。我们比较了聚合物渗透引起的碳纳米管阵列的结构变化。通过时间分辨 SAXS 跟踪填充动力学。我们发现两个完全分离的过程，它们与前体膜的形成和随后部分完成的吸入过程有关。 (C) 2013 年美国物理研究所。 [http://dx.doi.org/10.1063/1.4793087]
We analyze the polymer filling mechanism in composites containing highly ordered and vertically aligned carbon nanotube (CNT) arrays. CNTs are obtained by a template assisted chemical vapor deposition (CVD) method. Different forms of the arrays are studied with one or two carbon layers on top and bottom surface of the array, or freestanding CNTs. Investigation is done by small-angle X-ray scattering (SAXS) in combination with electron microscopy (TEM and SEM) and atomic force microscopy. Tubes are of 40 mu m length and 40/90 nm diameter. The original order of the template is only locally preserved in the CNT array. Imbibition of polymer is achieved in the inside of CNTs as well as in between. It modifies the local order of the tubes. We compare structural changes of CNT arrays caused by polymer infiltration. Filling kinetics is followed with time-resolved SAXS. We find two well separated processes that are related to the formation of a precursor film and subsequent partial completion of the imbibition process. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793087]