Reinforcement of polymers with carbon nanotubes:: The role of nanotube surface area
Reinforcement of polymers with carbon nanotubes:: The role of nanotube surface area
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DOI：
10.1021/nl035009o
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发表时间：
2004-02-01
期刊：
影响因子：
10.8
通讯作者：
Blau, WJ
中科院分区：
文献类型：
--
作者：
Cadek, M;Coleman, JN;Blau, WJ
拉伸试验进行了独立的复合膜的聚（乙烯醇）和六种不同类型的碳纳米管为不同的纳米管负载水平。在所有情况下，观察到杨氏模量显著增加高达2倍。诸如混合物法则或Halpin-Tsai理论等理论无法解释由不同管类型制成的复合材料之间的相对差异。然而，它是可能的，以显示的增强比例与总的纳米管表面积的膜，表明低直径的多壁纳米管是最好的管类型的增强。此外，在所有情况下，通过量热法检测到纳米管周围的结晶涂层，这表明可比较的聚合物-纳米管界面。因此，增强似乎是严重依赖于聚合物-纳米管的界面相互作用，如前所述。
Tensile tests were carried out on free-standing composite films of poly(vinyl alcohol) and six different types of carbon nanotubes for different nanotube loading levels. Significant increases in Young's modulus by up to a factor of 2 were observed in all cases. Theories such as the rule-of-mixtures or the Halpin-Tsai-theory could not explain the relative differences between composites made from different tube types. However, it is possible to show that the reinforcement scales linearly with the total nanotube surface area in the films, indicating that low diameter multiwall nanotubes are the best tube type for reinforcement. In addition, in all cases crystalline coatings around the nanotubes were detected by calorimetry, suggesting comparible polymer-nanotube interfaces. Thus, the reinforcement appears to be critically dependent on the polymer-nanotube interfacial interaction as previously suggested.