Spitalsky Z, Tsoukleri G, Tasis D, Krontiras C, Georga S N, Galiotis C
Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH-ICE/HT), 26504 Patras, Greece.
Nanotechnology. 2009 Oct 7;20(40):405702. doi: 10.1088/0957-4484/20/40/405702. Epub 2009 Sep 8.
A versatile processing technique for fabricating epoxy nanocomposites with a high weight fraction of oxidized multi-walled carbon nanotubes is presented. Thin carbon nanotube based preforms were prepared through an oxidation-filtration protocol and then immersed in a pre-polymerized epoxy/curing agent solution in acetone. By adjusting the conditions for the oxidation of carbon nanotubes and the epoxy concentration in the as-prepared solution, high loading of graphitic nanostructures was obtained. Tensile tests indicated that the elastic modulus and strength of certain composites prepared by in situ polymerization as above were improved by 100% and 60%, respectively, compared to neat epoxy. In addition, the composite sheets showed comparable electrical conductivity values to the neat carbon nanotube paper. These results suggest that targeted chemical modification of the carbon nanotube surface is an effective way to enhance the electrical and mechanical properties of carbon nanotube-polymer composites.
本文介绍了一种通用的加工技术，用于制备具有高重量分数氧化多壁碳纳米管的环氧纳米复合材料。通过氧化过滤方法制备了基于碳纳米管的薄预制件，然后将其浸入丙酮中的预聚合环氧树脂/固化剂溶液中。通过调整碳纳米管的氧化条件和所制备溶液中的环氧树脂浓度，获得了高负载的石墨纳米结构。拉伸试验表明，与纯环氧树脂相比，通过上述原位聚合制备的某些复合材料的弹性模量和强度分别提高了100%和60%。此外，复合片材的电导率值与纯碳纳米管纸相当。这些结果表明，对碳纳米管表面进行有针对性的化学改性是提高碳纳米管-聚合物复合材料电学和力学性能的有效方法。
