Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5468355 | Vacuum | 2017 | 9 Pages |
Abstract
The graphene-based composite paper with high thermal conductivity has attracted increasing attention for many potential applications in thermal management systems. In this paper, we reported a pristine-graphene based poly vinyl alcohol (PVA) composite film with high thermal conductivity. Firstly, a concentration of the PVA aqueous solution was mixed with the pristine-graphene made by a green way of supercritical CO2 exfoliation to form the composite solution via non-covalent. Then, the composite solution was filtered through a porous cellulose filter membrane (CFM) by using a vacuum dead-end micro-filtration method. Finally, the film was obtained by peeling from CFM after drying. The characterization results indicate that the as-produced film had a layer-aligned structure and well flexibility. The graphene content of the films varied from 20 wt% to 65 wt%, and their thermal conductivity varied between 10.15 and 36.81 W/mk. The results of dissipating heat indicated the film with 20 μm thickness and 50 wt% graphene loading enabled the temperature of heat source to reduce by 8 °C, suggesting it can be potentially applied in thermal management system.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Wenqi Liu, Ningning Song, Yue Wu, Yanzhe Gai, Yaping Zhao,