A highly orientational architecture formed by covalently bonded graphene to achieve high through-plane thermal conductivity of polymer composites

• DOI: 10.1039/d2nr02265f
• Publication Date: 2022-07-20T12:21:38Z
• Authors: Qingwei Yan; Jingyao Gao; Ding Chen; Peidi Tao; Lu Chen; Junfeng Ying; Xue Tan; Le Lv; Wen Dai; Fakhr E. Alam; Jinhong Yu; Yuezhong Wang; He Li; Chen Xue; Kazuhito Nishimura; Sudong Wu; Nan Jiang; Cheng-Te Lin
• Keywords: 01 natural sciences; 0104 chemical sciences

Combining the advantages of high thermal conductivities and low graphene contents to fabricate polymer composites for applications in management is still a great challenge due defect degree exfoliated graphene, poor orientation matrices, horrible phonon scattering between graphene/graphene graphene/polymer interfaces. Herein, mesoplasma chemical vapor deposition (CVD) technology was successfully employed synthesize vertically aligned nanowalls (GNWs), which are covalently bonded by high-quality CVD nanosheets. The unique architecture leads an excellent enhancement capacity GNWs, corresponding composite film with matrix polyvinylidene fluoride (PVDF) presented through-plane conductivity 12.8 ± 0.77 W m-1 K-1 at filler content 4.0 wt%, resulting per 1 wt% loading 1659, far superior that using conventional structures as thermally conductive pathways. In addition, this exhibited capability cooling high-power light-emitting diode (LED) device under real application conditions. Our finding provides new route prepare high-performance materials loadings via rational design microstructures/interfaces skeletons.