Enhanced thermal and electrical properties by Ag nanoparticles decorated GO-CNT nanostructures in PEEK composites

A nanostructure of graphene oxide (GO) and carbon nanotubes (CNTs) decorated with silver nanoparticles (AgGNT) has been prepared via a molecular-level-mixing (MLM) method followed by a subsequent freeze-drying and reduction process. The obtained well-dispersed AgGNT nanostructures were then applied...

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Bibliographic Details
Published in:Composites science and technology 2022-02, Vol.218, p.109201, Article 109201
Main Authors: Hu, Chenxi, Liu, Tianhui, Neate, Nigel, Fay, Michael, Hou, Xianghui, Grant, David, Xu, Fang
Format: Article
Language:English
Subjects:
Carbon
Carbon nanotubes
Composite materials
Dispersion
Durability
Electrical conduction
Electrical properties
Electrical resistivity
Graphene
Graphene and other 2D-materials
Heat conductivity
High temperature
Melt temperature
Nanoparticles
Nanostructure
Nanotubes
Polyether ether ketones
Polymer matrix composites
Polymer-matrix composites (PMCs)
Silver
Thermal conductivity
Thermal properties
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Summary:A nanostructure of graphene oxide (GO) and carbon nanotubes (CNTs) decorated with silver nanoparticles (AgGNT) has been prepared via a molecular-level-mixing (MLM) method followed by a subsequent freeze-drying and reduction process. The obtained well-dispersed AgGNT nanostructures were then applied as fillers to reinforce the poly(ether ether ketone) (PEEK) matrix. AgGNT-PEEK composites have then demonstrated excellent electrical and thermal conduction performances as well as high thermal durability compared with pure PEEK and its pure Ag or GO-CNT (GNT) enhanced composites. Owing to the unique morphology of AgGNT nanostructures, which made them uniformly dispersed in the PEEK matrix and formed a 3D network structure, the AgGNT-PEEK composites displayed 60% higher thermal conductivity and around 109 times better electrical conduction performance than pure PEEK, and superior thermal durability even above the melting temperature of pure PEEK. Thus, the AgGNT-PEEK composites have shown great potential for applications such as semiconductors, high-temperature electrical applications, aerospace, and automobile materials. [Display omitted] •Achieved uniformly Ag nanoparticles decorated GO/CNT (AgGNT) hybrid nanostructures.•Formed 3D network skeleton of AgGNT nanostructures in PEEK matrix.•Largely reduced electrical resistivity of obtained AgGNT-PEEK composites (from 5.8 × 1010 Ω m for pure PEEK sample to 10 Ω m).•Enhanced thermal conductivity of AgGNT-PEEK composites (1.6 times).•Improved thermal durability even above the melting temperature of PEEK.
ISSN:0266-3538
1879-1050
DOI:10.1016/j.compscitech.2021.109201