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Buckypaper/聚合物复合材料中碳纳米管团聚较少,且含量较高,使得碳纳米管的优异性能得以更加充分的发挥,显著提升了复合材料的各项性能。由于Buckypaper结构紧密,传统的滤渗浸渍方法不能满足制备高质量Buckypaper/环氧复合材料的要求。为提高环氧树脂在Buckypaper中的浸渍效率和质量,开发了Buckypaper的“加压滤渗”浸渍工艺,将环氧树脂溶液通过Buckypaper进行加压过滤,实现对Buckypaper的有效、均匀和完全浸渍。Buckypaper/环氧复合材料微观形貌表征结果表明,“加压滤渗”浸渍工艺制备的Buckypaper/环氧复合材料表面质量良好,且环氧树脂在Buckypaper内部充分浸渍,且分布均匀。与溶液浸渍法制备的Buckypaper/环氧复合材料对比,“加压滤渗”浸渍工艺制备的复合材料具有更加优异的力学性能,更加充分地发挥了Buckypaper的增强效率。

Buckypaper/polymer composites can take more advantages of the superior properties of carbon nanotubes (CNTs) and possess enhanced properties than traditional CNT/polymer composites, for the aggregation of CNTs is low and the CNT content is high. However, due to the dense structures of Buckypaper, the traditional infiltration technique cannot meet the requirements for fabricating high quality Buckypaper/polymer composites. A pressurized infiltration technique was developed to enhance the infiltration efficiency and quality. The epoxy solution was pressurized infiltrated through the Buckypaper, resulting in a well infused Buckypaper. The micro-structure characterization indicates that the surface and fracture structures of the Buckypaper/polymer composites are even and uniform. What's more, Buckypaper/epoxy composites fabricated by the pressurized infiltration technique possess much higher mechanical properties than that fabricated by the solution soaking technique.

参考文献

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