The Mechanical Properties of 3D-Printed Polylactic Acid/Polyethylene Terephthalate Glycol Multi-Material Structures Manufactured by Material Extrusion.

IF 4.7 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-02-01 Epub Date: 2024-02-15 DOI:10.1089/3dp.2021.0321

Emre Demir, İnal Kaan Duygun, Ayşe Bedeloğlu

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Abstract

The mechanical properties of polylactic acid (PLA), polyethylene terephthalate glycol (PETG), and PLA/PETG structures manufactured using the multi-material additive manufacturing (MMAM) method were studied in this work. Material extrusion additive manufacturing was used to print PLA/PETG samples with various PLA and PETG layer numbers. By varying the top and bottom layer numbers of two thermoplastics, the effect of layer number on the mechanical properties of 3D-printed structures was investigated. The chemical and thermal characteristics of PLA and PETG were investigated using Fourier transform infrared spectroscopy and differential scanning calorimetry. Tensile and flexural strength of 3D-printed PLA, PETG, and PLA/PETG samples were determined using tensile and three-point bending tests. The fracture surfaces of the samples were evaluated using optical microscopy. The results indicated that multi-material part containing 13 layers of PLA and 3 layers of PETG exhibited the highest ultimate tensile strength (65.4 MPa) and a good flexural strength (91.4 MPa). MMAM was discovered to be a viable way for producing PLA/PETG materials with great mechanical performance.

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材料挤压制备三维打印聚乳酸/聚对苯二甲酸乙二醇多材料结构的力学性能

这项工作研究了聚乳酸（PLA）、聚对苯二甲酸乙二酯（PETG）以及使用多材料增材制造（MMAM）方法制造的 PLA/PETG 结构的机械性能。采用材料挤出增材制造法打印具有不同聚乳酸和 PETG 层数的聚乳酸/PETG 样品。通过改变两种热塑性塑料的上下层数，研究了层数对三维打印结构机械性能的影响。使用傅立叶变换红外光谱法和差示扫描量热法研究了聚乳酸和 PETG 的化学和热特性。使用拉伸和三点弯曲试验测定了三维打印聚乳酸、PETG 和聚乳酸/PETG 样品的拉伸和弯曲强度。使用光学显微镜对样品的断裂面进行了评估。结果表明，含有 13 层聚乳酸和 3 层 PETG 的多材料部件具有最高的极限拉伸强度（65.4 兆帕）和良好的弯曲强度（91.4 兆帕）。研究发现，MMAM 是生产具有良好机械性能的 PLA/PETG 材料的可行方法。

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来源期刊

ACS Applied Bio Materials Chemistry-Chemistry (all)

CiteScore

9.40

自引率

2.10%

发文量

464

期刊介绍： ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.