Abstract
Layer-based 3D printing of digital light processing offer good control over the orientation of long reinforcing fibers but still lacks superior mechanical properties. In this paper, nanocomposites with polymer and magnetic Fe3O4@graphene fillers were printed by the DLP method where the magnetic Fe3O4@graphene inside the polymer was aligned with a magnetic field. The alignment of nanofillers significantly enhanced the mechanical properties. By varying the angle of the magnetic field, Fe3O4@graphene reinforced composites produced different mechanical properties. Aligned structure-mechanical property relation revealed that 0⁰ alignment enhanced mechanical property more compared to 90⁰ alignment of filler materials at the concentrations of 0.4, 0.8, and 1.6 wt.%. This is attributed to the dispersion and orientation of the nanofillers and the photopolymerization of the monomer. The Young's modulus for the aligned 0.8 wt.% of Fe3O4@graphene(1/3) filler showed a significant improvement when a magnetic field was applied at a 0⁰ angle.
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