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Micromachines 2018, 9(12), 635; https://doi.org/10.3390/mi9120635

Research on the Application of MWCNTs/PLA Composite Material in the Manufacturing of Conductive Composite Products in 3D Printing

1,2,3
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1,2
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1,2
,
1,2
and
3,4,*
1
Department of Mechanical Engineeering, Chongqing Sanxia Institute, Chongqing 404000, China
2
Chongqing Engineering Technology Research Center for Light Alloy and Processing, Chongqing 404000, China
3
School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
4
College of Food Science, Sichuan Agricultural University, Yaan 625014, China
*
Author to whom correspondence should be addressed.
Received: 18 October 2018 / Revised: 21 November 2018 / Accepted: 26 November 2018 / Published: 30 November 2018
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Abstract

As an advanced manufacturing technology that has been developed in recent years, three-dimensional (3D) printing of macromolecular materials can create complex-shaped components that cannot be realized by traditional processing. However, only a few types of macromolecular materials are suitable for 3D printing: the structure must have a single function, and manufacturing macromolecular functional devices is difficult. In this study, using poly lactic acid (PLA) as a matrix, conductive composites were prepared by adding various contents of multi-walled carbon nanotubes (MWCNTs). The printability and properties of MWCNT/PLA composites with different MWCNT proportions were studied by using the fused deposition modeling (FDM) processing technology of 3D printing. The experimental results showed that high conductivity can be realized in 3D-printed products with a composite material containing 5% MWCNTs; its conductivity was 0.4 ± 0.2 S/cm, its tensile strength was 78.4 ± 12.4 MPa, and its elongation at break was 94.4% ± 14.3%. It had a good melt flow rate and thermal properties, and it enabled smooth printing, thus meeting all the requirements for the 3D printing of consumables. View Full-Text
Keywords: PLA; MWCNTs; 3D printer PLA; MWCNTs; 3D printer
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Luo, J.; Wang, H.; Zuo, D.; Ji, A.; Liu, Y. Research on the Application of MWCNTs/PLA Composite Material in the Manufacturing of Conductive Composite Products in 3D Printing. Micromachines 2018, 9, 635.

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