Abstract
To solve the problem of low interlayer strength of 3D plastic powder printing, in this work, magnetized carbon nanotubes (CNTs) are added to the epoxy powder of 3D printing, and a 0.3 T magnetic field is introduced on the printed powder box to explore the interfacial enhancement effect of CNTs on the interlayer strength of 3D printing of plastic powder. The results show that the magnetized CNTs are vertically arranged in the interlayer, which greatly improves the interlayer bonding strength of 3D plastic printing. When the content of magnetized CNTs is below 4 wt. %, the interlayer bonding strength of epoxy resin 3D printing increases as the content of CNTs increases; when the content of CNTs was 4 wt. %, the interlayer bonding strength increased to a maximum of 4.5 MPa, 50% higher than the unadded specimen; when the content of CNTs increased to 4–6 wt. %, the interlayer bonding strength of the specimens is between 4.5 MPa and 4.3 MPa, basically unchanged; when the content of CNTs increased to more than 7 wt. %, the interfacial strength decreased.
Highlights
In view of this practical situation, in this work, the enhancement effect of magnetized carbon nanotubes (CNTs) on 3D plastic powder printing is studied
Magnetized CNTs were mixed into the 3D printed epoxy powder, and a magnetic field of 0.3 T was added to the 3D printing powder box
Under the action of the magnetic field, the magnetized CNTs can form a directional arrangement between the interlayer to improve the interlayer bonding strength of the printed samples
Summary
In view of this practical situation, in this work, the enhancement effect of magnetized carbon nanotubes (CNTs) on 3D plastic powder printing is studied. The principle is to add magnetized CNTs to 3D plastic powder and a magnetic field to the 3D printing boxes. The partially magnetized CNTs will be exposed to the surface of the cured plastic layer. After the layer of plastic powder is covered, the fibrous carbon material exposed to the previous surface will extend and cure into this layer, realizing the shuttle connection between the two layers of CNTs. Because of the high strength of carbon fiber materials, the interface of 3D printing is enhanced and the strength of 3D printing parts is effectively improved, making the printed parts unbreakable under the pressure field
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