[Nanoscale] Ultra-high Thermal Conductivity and Rapid Heat Response in Self-aligned Graphene/Poly(benzobisoxazole) Nanocomposites
writer：Weifeng Zhao, Jie Kong*, Hu Liu, Qiang Zhuang, Junwei Gu and Zhanhu Guo*
keywords：Ultra-high Thermal Conductivity, Poly(benzobisoxazole), Nanocomposites
source：期刊
specific source：Nanoscale, 2016, 8, 19984-19993
Issue time：2016年
Weifeng Zhao, Jie Kong*, Hu Liu, Qiang Zhuang, Junwei Gu and Zhanhu Guo*, Ultra-high Thermal Conductivity and Rapid Heat Response in Self-aligned Graphene/Poly(benzobisoxazole) Nanocomposites, Nanoscale, 2016, 8, 19984-19993
鏈接：http://pubs.rsc.org/en/content/articlelanding/2016/nr/c6nr06622d#!divAbstract
Abstract: Self-alignment of thermally reduced graphene sheets (TRG) that enable highly efficient heat transfer paths in their poly(p-phenylene benzobisoxazole) (PBO)-based nanocomposite films along the in-plane direction was achieved for the first time without any assistance of external magnetic or electric field. In the in-plane direction, the nanocomposite films possess ultra-high thermal diffusivity (900-1000 mm2/s) and thermal conductivity (50 W/m·k) with a TRG concentration <5.0 vol%, setting a new record for polymer composites with such a low graphene filler loading. The arranged TRG was also found to display a high efficiency for the PBO reinforcement. A 64% increase in Young’s modulus was achieved by the addition of only 0.35 vol% of TRG, corresponding to a reinforcement value as high as 747 ± 38 GPa, due to the effective load transfer between the PBO matrix and TRG sheets via strong interfacial interactions. Moreover, the highly ordered graphene in PBO could provide good candidates for effective heat shielding barriers, and thus the prepared PBO composites exhibit a thermal stability remarkably higher than that of neat PBO resin.