N991/MWCNTs/PEO composite films with nano SiO 2 particles as filler for advanced flexible electric heating elements

2017 ◽  
Vol 90 ◽  
pp. 273-279 ◽  
Author(s):  
Yang Xia ◽  
Xiaojun Yu ◽  
Chengjie Sheng ◽  
Chu Liang ◽  
Hui Huang ◽  
...  
Keyword(s):  
Composite Films ◽  
Electric Heating

scholarly journals Hierarchically Multifunctional Polyimide Composite Films with Strongly Enhanced Thermal Conductivity

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Yongqiang Guo ◽  
Hua Qiu ◽  
Kunpeng Ruan ◽  
Yali Zhang ◽  
Junwei Gu
Keyword(s):  
Thermal Conductivity ◽  
Electromagnetic Interference ◽  
Composite Films ◽  
Expanded Graphite ◽  
Electric Heating ◽  
Processing Unit ◽  
Shielding Effectiveness ◽  
Emi Shielding ◽  
Heat Accumulation ◽  
Central Processing

AbstractThe development of lightweight and integration for electronics requires flexible films with high thermal conductivity and electromagnetic interference (EMI) shielding to overcome heat accumulation and electromagnetic radiation pollution. Herein, the hierarchical design and assembly strategy was adopted to fabricate hierarchically multifunctional polyimide composite films, with graphene oxide/expanded graphite (GO/EG) as the top thermally conductive and EMI shielding layer, Fe3O4/polyimide (Fe3O4/PI) as the middle EMI shielding enhancement layer and electrospun PI fibers as the substrate layer for mechanical improvement. PI composite films with 61.0 wt% of GO/EG and 23.8 wt% of Fe3O4/PI exhibits high in-plane thermal conductivity coefficient (95.40 W (m K)−1), excellent EMI shielding effectiveness (34.0 dB), good tensile strength (93.6 MPa) and fast electric-heating response (5 s). The test in the central processing unit verifies PI composite films present broad application prospects in electronics fields.

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