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Graphene–polyamide‐6 composite for additive manufacture of multifunctional electromagnetic interference shielding components
Author(s) -
Lee Kok Peng Marcian,
Baum Thomas,
Shanks Robert,
Daver Fugen
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49909
Subject(s) - materials science , graphene , composite material , polyamide , composite number , extrusion , ultimate tensile strength , electromagnetic shielding , scanning electron microscope , dielectric , nanocomposite , reflection loss , nanotechnology , optoelectronics
Graphene–polyamide‐6 composite (GC) filament with 9%·v/v graphene concentration was applied as feedstock in filament‐based material extrusion (ME) additive manufacturing. The materials are characterized by melt flow index (MFI), mechanical properties, dielectric properties, and electromagnetic interference shielding effectiveness (EMI SE) in the X‐band frequency range. Despite high graphene concentration, MFI is unaffected. In ME test specimens; GC has both superior elastic modulus and tensile strength at yield when compared with the neat polymer. Enhanced mechanical properties at high graphene concentration without diminished processability highlight the suitability of polyamide‐6 (PA6) as matrix material for graphene composite filaments. Scanning electron microscopy (SEM) imaging indicates graphene alignment in GC after printing. In both compression molded (CM) and ME test specimens, dielectric properties and EMI SE of PA6 are enhanced by graphene inclusion. Further analysis reveals that ME has a negative influence on absorption of electromagnetic waves, while reflection is virtually unaffected.