Magnetic-field-assisted DLP stereolithography for controlled production of highly aligned 3D printed polymer-Fe3O4@graphene nanocomposites. (October 2022)

• Record Type: Journal Article
• Authors: Younes, Hammad; Kuang, Xiao; Lou, Ding; DeVries, Brandon; Rahman, Md Mahfuzur; Hong, Haiping
• Is Part Of: Materials research bulletin. Volume 154(2022)
• Publication Date: 2022-10
• Subjects: A. composites -- A. magnetic materials -- B. mechanical properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2022.111938
• Languages: English
• ISSNs: 0025-5408

Abstract

Highlights: Magnetically sensitive Fe3 O4 nanoparticles were successfully attached to nonmagnetic graphene nanoplatelets. Nanocomposites with polymer and magnetic Fe3 O4 @graphene fillers were 3D-printed by the DLP (digital light processing) method. Fe3 O4 @graphene was aligned with a magnetic field the mechanical properties were significantly enhanced by the aligned nanofillers. By varying the angle of the magnetic field, Fe3 O4 @graphene reinforced composites produced different mechanical properties. 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 Fe3 O4 @graphene fillers were printed by the DLP method where the magnetic Fe3 O4 @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, Fe3 O4 @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 Fe3 O4 @graphene(1/3) filler showed a significant improvement when a magnetic field was applied at a 0⁰ angle. Graphical abstract: Image, graphical abstract