School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul, Korea.
Nanotechnology. 2012 Feb 17;23(6):065303. doi: 10.1088/0957-4484/23/6/065303. Epub 2012 Jan 17.
Amino-functionalized nano-aluminum nitride (nano-AlN) particles were doped onto the surfaces of chlorinated multi-walled carbon nanotubes (MWCNTs) to act as fillers in thermally conducting composites. These synthesized materials were embedded in epoxy resin. Then, the untreated micro-aluminum nitride (micro-AlN) particles were added to this resin, whereby the composites filled with nano-AlN-doped MWCNTs (0, 0.5, 1, 1.5, 2 wt%) and micro-AlN (25.2, 44.1, 57.4 vol%) were fabricated. As a result, the thermal diffusivity and conductivity of all composites continuously improved with increasing nano-AlN-doped MWCNT content and micro-AlN filler loading. The thermal conductivity reached its maximum, which was 31.27 times that of the epoxy alone, when 2 wt% nano-AlN-doped MWCNTs and 57.4 vol% micro-AlN were added to the epoxy resin. This result is due to the high aspect ratio of the MWCNTs and the surface polarity of the doped nano-AlN and micro-AlN particles, resulting in the improved thermal properties of the epoxy composite.
氨基功能化纳米氮化铝（nano-AlN）颗粒被掺杂到氯化多壁碳纳米管（MWCNTs）的表面上，作为导热复合材料中的填充剂。这些合成材料被嵌入到环氧树脂中。然后，将未经处理的微米氮化铝（micro-AlN）颗粒添加到这种树脂中，由此制备了填充有纳米氮化铝掺杂的 MWCNTs（0、0.5、1、1.5、2wt%）和微米氮化铝（25.2、44.1、57.4vol%）的复合材料。结果，随着纳米氮化铝掺杂的 MWCNT 含量和微米氮化铝填充量的增加，所有复合材料的热扩散率和热导率都连续提高。当 2wt%纳米氮化铝掺杂的 MWCNTs 和 57.4vol%微米氮化铝被添加到环氧树脂中时，复合材料的热导率达到最大值，是纯环氧树脂的 31.27 倍。这一结果归因于 MWCNTs 的高纵横比和掺杂的纳米氮化铝和微米氮化铝颗粒的表面极性，从而提高了环氧树脂复合材料的热性能。
