Tensile properties of 3D-printed CNT-SGF reinforced PLA composites

Guixiang Zhao; Hong Yuan Liu; Xiaoyu Cui; Xusheng Du; Helezi Zhou; Yiu Wing Mai; Yuan Yuan Jia; Wenyi Yan

doi:10.1016/j.compscitech.2022.109333

Tensile properties of 3D-printed CNT-SGF reinforced PLA composites

Guixiang Zhao, Hong Yuan Liu, Xiaoyu Cui, Xusheng Du, Helezi Zhou, Yiu Wing Mai, Yuan Yuan Jia, Wenyi Yan

Research output: Journal article publication › Journal article › Academic research › peer-review

26 Citations (Scopus)

Abstract

Carbon nanotubes (CNTs) were coated on short glass fibres (SGFs) through a one-step flame synthesis technique. Then, these CNT coated SGF (CNT-SGF) reinforced polylactic acid (PLA) composite filaments were processed as a new fused deposition modelling (FDM) 3D printing feedstock. Tensile tests were conducted on FDM 3D-printed specimens with two raster angles (±45° and 0°/90°) each containing pure PLA filaments, SGF/PLA and CNT-SGF/PLA composite filaments separately. Compared to the pure 3D-printed PLA samples, experimental results showed that the 3D-printed specimens using SGFs (≥5 wt%) and CNT-SGFs (1–5 wt%) reinforced PLA filaments exhibited higher Young's modulus and tensile strength values due to the enhanced interface adhesion. Furthermore, the FDM printing raster angles (±45° and 0°/90°) did not noticeably affect the tensile properties of the samples made of the same material, which could be attributed to the complete fusion between adjacent rasters during printing. Scanning electron microscopy (SEM) images on the fracture surfaces of the tensile specimens indicated that the filler distribution within the printed samples was random. Theoretical calculations of the Young's modulus and computational fluid dynamics (CFD) simulation on SGF reinforced PLA samples further verified a random distribution of the fillers within the matrix due to the high printer nozzle diameter to SGF length ratio compared to the short SGF aspect ratio.

Original language	English
Article number	109333
Journal	Composites Science and Technology
Volume	230
DOIs	https://doi.org/10.1016/j.compscitech.2022.109333
Publication status	Published - 10 Nov 2022
Externally published	Yes

Keywords

A. Carbon nanotubes
A. Glass fibres
B. Mechanical properties
E. 3D printing

ASJC Scopus subject areas

Ceramics and Composites
General Engineering

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10.1016/j.compscitech.2022.109333

Cite this

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title = "Tensile properties of 3D-printed CNT-SGF reinforced PLA composites",

abstract = "Carbon nanotubes (CNTs) were coated on short glass fibres (SGFs) through a one-step flame synthesis technique. Then, these CNT coated SGF (CNT-SGF) reinforced polylactic acid (PLA) composite filaments were processed as a new fused deposition modelling (FDM) 3D printing feedstock. Tensile tests were conducted on FDM 3D-printed specimens with two raster angles (±45° and 0°/90°) each containing pure PLA filaments, SGF/PLA and CNT-SGF/PLA composite filaments separately. Compared to the pure 3D-printed PLA samples, experimental results showed that the 3D-printed specimens using SGFs (≥5 wt%) and CNT-SGFs (1–5 wt%) reinforced PLA filaments exhibited higher Young's modulus and tensile strength values due to the enhanced interface adhesion. Furthermore, the FDM printing raster angles (±45° and 0°/90°) did not noticeably affect the tensile properties of the samples made of the same material, which could be attributed to the complete fusion between adjacent rasters during printing. Scanning electron microscopy (SEM) images on the fracture surfaces of the tensile specimens indicated that the filler distribution within the printed samples was random. Theoretical calculations of the Young's modulus and computational fluid dynamics (CFD) simulation on SGF reinforced PLA samples further verified a random distribution of the fillers within the matrix due to the high printer nozzle diameter to SGF length ratio compared to the short SGF aspect ratio.",

keywords = "A. Carbon nanotubes, A. Glass fibres, B. Mechanical properties, E. 3D printing",

author = "Guixiang Zhao and Liu, {Hong Yuan} and Xiaoyu Cui and Xusheng Du and Helezi Zhou and Mai, {Yiu Wing} and Jia, {Yuan Yuan} and Wenyi Yan",

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AU - Zhao, Guixiang

AU - Liu, Hong Yuan

AU - Cui, Xiaoyu

AU - Du, Xusheng

AU - Zhou, Helezi

AU - Mai, Yiu Wing

AU - Jia, Yuan Yuan

AU - Yan, Wenyi

PY - 2022/11/10

Y1 - 2022/11/10

N2 - Carbon nanotubes (CNTs) were coated on short glass fibres (SGFs) through a one-step flame synthesis technique. Then, these CNT coated SGF (CNT-SGF) reinforced polylactic acid (PLA) composite filaments were processed as a new fused deposition modelling (FDM) 3D printing feedstock. Tensile tests were conducted on FDM 3D-printed specimens with two raster angles (±45° and 0°/90°) each containing pure PLA filaments, SGF/PLA and CNT-SGF/PLA composite filaments separately. Compared to the pure 3D-printed PLA samples, experimental results showed that the 3D-printed specimens using SGFs (≥5 wt%) and CNT-SGFs (1–5 wt%) reinforced PLA filaments exhibited higher Young's modulus and tensile strength values due to the enhanced interface adhesion. Furthermore, the FDM printing raster angles (±45° and 0°/90°) did not noticeably affect the tensile properties of the samples made of the same material, which could be attributed to the complete fusion between adjacent rasters during printing. Scanning electron microscopy (SEM) images on the fracture surfaces of the tensile specimens indicated that the filler distribution within the printed samples was random. Theoretical calculations of the Young's modulus and computational fluid dynamics (CFD) simulation on SGF reinforced PLA samples further verified a random distribution of the fillers within the matrix due to the high printer nozzle diameter to SGF length ratio compared to the short SGF aspect ratio.

AB - Carbon nanotubes (CNTs) were coated on short glass fibres (SGFs) through a one-step flame synthesis technique. Then, these CNT coated SGF (CNT-SGF) reinforced polylactic acid (PLA) composite filaments were processed as a new fused deposition modelling (FDM) 3D printing feedstock. Tensile tests were conducted on FDM 3D-printed specimens with two raster angles (±45° and 0°/90°) each containing pure PLA filaments, SGF/PLA and CNT-SGF/PLA composite filaments separately. Compared to the pure 3D-printed PLA samples, experimental results showed that the 3D-printed specimens using SGFs (≥5 wt%) and CNT-SGFs (1–5 wt%) reinforced PLA filaments exhibited higher Young's modulus and tensile strength values due to the enhanced interface adhesion. Furthermore, the FDM printing raster angles (±45° and 0°/90°) did not noticeably affect the tensile properties of the samples made of the same material, which could be attributed to the complete fusion between adjacent rasters during printing. Scanning electron microscopy (SEM) images on the fracture surfaces of the tensile specimens indicated that the filler distribution within the printed samples was random. Theoretical calculations of the Young's modulus and computational fluid dynamics (CFD) simulation on SGF reinforced PLA samples further verified a random distribution of the fillers within the matrix due to the high printer nozzle diameter to SGF length ratio compared to the short SGF aspect ratio.

KW - A. Carbon nanotubes

KW - A. Glass fibres

KW - B. Mechanical properties

KW - E. 3D printing

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Tensile properties of 3D-printed CNT-SGF reinforced PLA composites

Abstract

Keywords

ASJC Scopus subject areas

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