Effect of natural filler loading, multi-walled carbon nanotubes (MWCNTs), and moisture absorption on the dielectric constant of natural filled epoxy composites

•The higher vol% natural filler loading affects the moisture absorption curves.•The Napier-filled epoxy composites show the lowest dielectric constant.•The presence of MWCNTs decreased the dielectric constant of 7% Jute composites.•The moisture absorption reduced the dielectric constant of the compo...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2020-12, Vol.262, p.114744, Article 114744
Main Authors: Ridzuan, M.J.M., Abdul Majid, M.S., Khasri, A., Cheng, E.M., Razlan, Z.M.
Format: Article
Language:English
Subjects:
Absorption
Cold pressing
Dielectric constant
Epoxy resins
Fillers
Jute
Kenaf
Moisture absorption
Moisture content
Multi wall carbon nanotubes
MWCNTs
Napier
Natural composites
Network analysers
Permittivity
Polymer matrix composites
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Summary:•The higher vol% natural filler loading affects the moisture absorption curves.•The Napier-filled epoxy composites show the lowest dielectric constant.•The presence of MWCNTs decreased the dielectric constant of 7% Jute composites.•The moisture absorption reduced the dielectric constant of the composites. The effect of natural filler loading, multi-walled carbon nanotubes (MWCNTs), and moisture absorption on the dielectric constant of natural filled epoxy composites was investigated. The natural filled epoxy composites were fabricated using a natural filler, MWCNTs and epoxy resin. The natural fillers chosen were Jute, Kenaf, and Napier. Composites were manufactured using a cold-press method, with the loading of the natural fillers being 7, 14, and 21 vol%, respectively, while the MWCNTs were 0 and 2 vol%. Dielectric tests were conducted using an Agilent/Keysight E8363B PNA Network Analyser in dry and wet conditions. The moisture absorption curves indicate that higher vol% natural filler loading increases the moisture content of the composites. The results show that the Napier filled epoxy composite had the lowest dielectric constant between 12.40 GHz and 16.66 GHz. The presence of 2 vol% MWCNTs successfully decreased the dielectric constant for 7 vol% Jute filled epoxy composites.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2020.114744