Development of polyamide 6-graphene oxide nanocomposite and direct-joining with aluminum alloy for lightweight engineering applications

Author(s)

Luiz, G. M. ; Oliveira, G. H. M. ; Canto, L. B.

• Document type: Journal article
• Source: POLYMER ENGINEERING AND SCIENCE; v. 64, n. 2, p. 12-pg., 2023-11-28.

Abstract

Lightweight polyamide composites and structures have been widely studied and employed in several industrial sectors. In this study, the development of a nanocomposite of polyamide 6 and graphene oxide (PA6-GO) by melt-compounding and the joining with aluminum alloy AA6061 through direct-adhesion injection overmolding are addressed. PA6-GO nanocomposite exhibited well-dispersed thin (300 nm) GO platelets distributed within the PA6 matrix, which resulted in an increase of 21% in the tensile modulus and 16% in the yield stress for a filler loading of 0.5 wt%. PA6-GO/AA6061 hybrid joints showed good mechanical anchorage through the complete filling of the polymer into micro-scale grooves designed onto the metal surface, which ensured outstanding shear strength of 7.1 +/- 1.0 MPa, comparable to other polyamide-metal hybrid joints reported in the literature. This indicates that the processing routes and materials developed are promising for lightweight engineering applications.HighlightsA PA6-GO nanocomposite with enhanced tensile properties was developed.A joint of PA6-GO and AA6061 with outstanding shear strength was obtained.Fast and efficient melt-processing routes were employed.These materials are promising for lightweight engineering applications. Development of polyamide 6-graphene oxide nanocomposite and direct-joining with aluminum alloy.image (AU)

• FAPESP's process: 18/24296-0 - Injection over-molding of polymer-metal hybrid joints
• Grantee: Leonardo Bresciani Canto
• Support Opportunities: Regular Research Grants