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Functionalised graphene effect on the mechanical and thermal properties of recycled PA6/PA6,6 blends

Feras Korkees Orcid Logo, Abdullah Aldrees, Imad Barsoum, Dalal Alshammari

Journal of Composite Materials, Volume: 55, Issue: 16, Pages: 2211 - 2224

Swansea University Author: Feras Korkees Orcid Logo

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DOI (Published version): 10.1177/0021998320987897

Abstract

Limiting the generation of polymers waste and maximizing their recyclability and recovery have been the main focus of the research and industry in recent years. Recycling of polyamides leads to the loss in mechanical and thermal properties, therefore, in order to reuse recycled nylons, an enhancemen...

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Published in: Journal of Composite Materials
ISSN: 0021-9983 1530-793X
Published: SAGE Publications 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa56119
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Abstract: Limiting the generation of polymers waste and maximizing their recyclability and recovery have been the main focus of the research and industry in recent years. Recycling of polyamides leads to the loss in mechanical and thermal properties, therefore, in order to reuse recycled nylons, an enhancement in their properties is desired. Enhancing the properties of recycled polyamides by the addition of functionalised graphene nanoparticles (GNPs) was the goal of this study. Recycled PA6/PA6,6 blends and functionalised graphene nanocomposites were prepared using hot-melt extrusion process. Two types of functionalised graphene were used: O2-GNPs and Amine-GNPs. The nanofillers didn’t affect the crystallinity of the recycled nylon, while the presence of functionalised graphene increased the thermal conductivity by enabling better heat transfer routes within the polymer. The microstructure of the materials was characterised confirming the successful dispersion but with a slight variation in GNPs/Polymer bonding depending on the functionalisation type. The strong nylon-to-graphene interfacial hydrogen bonding increased the mechanical properties of the recycled nylon nanocomposites. The functionalised nanoparticles slowed down the segmental motion of the polymer chain and decreased the ductility with increasing GNPs contents up to 10 wt%. The overall behaviour of recycled nylon nanocomposites showed dependency on the type of functionalisation and concentration of GNPs with better improvement in the overall properties using 2 wt% Amine-GNPs. These enhanced properties make functionalised graphene/recycled nylon nanocomposites a promising new class of advanced materials.
Keywords: Nanocomposites, polyamide, mechanical properties, thermal properties, polymer blends
College: Faculty of Science and Engineering
Funders: Ser Cymru National Research Network (‘NRN’) [7th Call-Industrial Collaboration Awards (ICA)] and Perpetuus Carbon Technology, Wales, UK.
Issue: 16
Start Page: 2211
End Page: 2224

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