Improving in-plane and out-of-plane thermal conductivity of polyimide/boron nitride film with reduced graphene oxide by a moving magnetic field induction
Improving in-plane and out-of-plane thermal conductivity of polyimide/boron nitride film with reduced graphene oxide by a moving magnetic field induction
复制标题
通过移动磁场感应提高还原氧化石墨烯聚酰亚胺/氮化硼薄膜的面内和面外导热率
DOI：
10.1016/j.compscitech.2022.109292
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发表时间：
2022-02-01
影响因子：
9.1
通讯作者：
Dai, Peibang
中科院分区：
文献类型：
--
作者：
Liu, Dongxu;Chi, Hongtao;Dai, Peibang
为了开发高性能的热管理材料，本文通过原位修饰聚多巴胺成功地制备了还原氧化石墨烯和磁性针状氧化铁的混合纳米颗粒（GF）。提出了一种具有大规模应用潜力的移动磁场感应（MF）方法，用于实现氮化硼（BN）/聚酰亚胺复合薄膜中玻璃纤维的定向。GF纳米粒子与复合膜的面内方向成一定角度部分排列，与BN协同改善了复合膜的导热网络，从而同时提高了复合膜的面内和面外导热性能。当填料含量为30wt%时，复合膜的面内和面外热导率分别达到2.532Wm（-1）K-1和0.425Wm（-1）K-1，比纯PI分别提高了1233%和150%。本工作为高导热材料的设计提供了一种新颖有效的方法。
To develop high-performance thermal management materials, herein, the hybrid nanoparticle (GF) of reduced graphene oxide and magnetic needle-like ferro oxide was successfully prepared by in-situ modification of polydopamine. A moving magnetic field induction (MF) strategy with a potential of large-scale application was proposed to realize the alignment of the GF in the boron nitride (BN)/polyimide composite film. The GF nanoparticles were partially aligned at a certain angle from in-plane direction of the composite film and synergistically improved the thermal conductivity network with the BN, which results in simultaneous enhancement in the in-plane and out-of-plane thermal conductivity. At 30 wt% filler content, the in-plane and out-of-plane thermal conductivity of the composite film reached 2.532 W m(- 1) K-1 and 0.425 W m(-1) K-(1), which is 1233% and 150% higher than that of the pure PI, respectively. This work developed a novel and efficient approach for the design of high thermal conductive materials.