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- Title
Preparation of PMIA dielectric nanocomposite with enhanced thermal conductivity by filling with functionalized graphene–carbon nanotube hybrid fillers.
- Authors
Duan, Guangyu; Wang, Yan; Yu, Junrong; Zhu, Jing; Hu, Zuming
- Abstract
A novel poly(m-phenyleneisophthalamide) (PMIA) dielectric nanocomposite was successfully fabricated with functionally reduced graphene oxide (frGO) and multi-walled carbon nanotubes (MWCNTs) hybrid fillers. Due to effective functionalization of reduced graphene oxide as well as π–π interaction between frGO and MWCNTs, FGC (FGC) hybrid fillers were well-distributed in PMIA matrix. The relevant properties of FGC/PMIA dielectric nanocomposite were researched, and results demonstrated that the dielectric constant of PMIA nanocomposite with 3 wt% FGC hybrid fillers was increased to 12.8 (increased by 290%). Due to the existence of FGC fillers, the THeat-resistance index of FGC/PMIA nanocomposites displayed an obvious increment. In addition, the "bridge effect" of MWCNTs on improving thermal conductivity of FGC/PMIA dielectric nanocomposite was also significant. For PMIA nanocomposite with 3 wt% FGC hybrid fillers, the thermal conductivity was remarkably increased to 7.38 W/m·K of in-plane direction and 0.81 W/m·K of through-plane direction. Consequently, these results reveal a new approach for preparing FGC/PMIA dielectric nanocomposite with high operating temperature and outstanding thermal conductivity, which can meet the urgent demand for high-temperature applications.
- Subjects
DIELECTRICS; GRAPHENE oxide; PERMITTIVITY; CARBON nanotubes; HIGH temperatures
- Publication
Applied Nanoscience, 2019, Vol 9, Issue 8, p1743
- ISSN
2190-5509
- Publication type
Article
- DOI
10.1007/s13204-019-00955-0