Experimental Evaluation of Mechanical Properties, Thermal Analysis, Morphology, Printability, and Shape Memory Performance of the Novel 3D Printed PETG-EVA Blends

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2024-05-14 DOI:10.1002/mame.202400069

Saeed J. A. Ali, Davood Rahmatabadi, Mostafa Baghani, Majid Baniassadi

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引用次数: 0

Abstract

Polyethylene terephthalate glycol (PETG) is a novel amorphous shape memory polymer with excellent printability for 4D printing. In this article, ethylene-vinyl acetate (EVA) is used as a biocompatible and non-toxic copolymer to improve plasticity and shape memory performance of PETG. PETG-EVA blends are prepared and 3D printed using a melt mixing method and an upgraded fused deposition modeling (FDM) with a pneumatic feeding system. The results of the thermal analysis show that the blends exhibit two tan-delta peaks, each related to their components, and morphology images confirm that they are biphasic and immiscible with good compatibility. The morphology of both EVA10 and EVA30 matrix droplets is observed, with the droplets being larger for EVA30. The use of a pneumatic feeding system, along with the ability to control the output melt flow, results in the best printing ability for EVA30, with minimal microholes between the grids and interlayer cracks. The tensile strength of PETG-EVA blends ranged from 25.38 to 20.14 MPa, with the highest tensile strength achieved for EVA30. The shape memory performance of all three blends is similar; with shape recovery exceeding 90% in 20 s. Blends with higher EVA content exhibited faster shape recovery within the first 10 s.

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对新型 3D 打印 PETG-EVA 混合物的机械性能、热分析、形态、可打印性和形状记忆性能的实验评估

聚对苯二甲酸乙二醇酯（PETG）是一种新型的无定形形状记忆聚合物，在 4D 印刷中具有优异的可印刷性。本文使用乙烯-醋酸乙烯（EVA）作为生物相容性和无毒共聚物，以改善 PETG 的可塑性和形状记忆性能。采用熔融混合法和带气动进给系统的升级版熔融沉积成型（FDM）技术制备 PETG-EVA 混合物并进行三维打印。热分析结果表明，共混物显示出两个 tan-delta 峰，每个峰都与它们的成分有关，形态学图像证实它们是双相的，不相溶，具有良好的兼容性。可以观察到 EVA10 和 EVA30 基质液滴的形态，EVA30 的液滴更大。气动进料系统的使用以及控制输出熔体流量的能力使 EVA30 的印刷能力达到最佳，栅格之间的微孔和层间裂缝最小。PETG-EVA 混合物的拉伸强度在 25.38 到 20.14 兆帕之间，其中 EVA30 的拉伸强度最高。三种混合物的形状记忆性能相似；20 秒内形状恢复超过 90%。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.