粉末床熔融法制备多尺度多孔聚醚醚酮结构

IF 2.3 4区 工程技术 Q3 ENGINEERING, MANUFACTURING 3D Printing and Additive Manufacturing Pub Date : 2024-02-01 Epub Date: 2024-02-15 DOI:10.1089/3dp.2021.0317
Yaan Liu, Richard Davies, Nan Yi, Paul McCutchion, Binling Chen, Oana Ghita
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引用次数: 0

摘要

这项研究的目的是在保持机械性能的同时,创造一种多尺度高多孔聚醚醚酮(PEEK)结构;孔隙的分布是由制造工艺结合成孔剂浸出操作产生的。在粉末床熔融工艺中,使用浓度为 70 wt% 的盐作为成孔剂,与烧结的 PEEK 粉末干混。通过扫描电子显微镜、微计算机断层扫描和机械测试,对印刷的多孔 PEEK 结构进行了检查和评估。含盐量为 70 wt% 的 PEEK 结构的孔隙率为 79-86%,抗压屈服强度为 4.1 MPa,屈服应力为 60%。由于采用了盐浸工艺,PEEK 多孔框架的制造无需大幅降低工艺参数(由能量密度[ED]决定),从而保持了结构的完整性和良好的机械性能。压缩结果表明,性能受印刷方向、PEEK 颗粒凝聚程度(由 ED 控制)、孔隙/细胞壁厚度以及整体多孔框架的影响。多孔印刷 PEEK 结构可广泛应用于组织工程、过滤和分离、催化剂、药物释放和气体储存等领域。
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Multiscale Porous Poly (Ether-Ether-Ketone) Structures Manufactured by Powder Bed Fusion Process.

The aim of the study is to create a multiscale highly porous poly (ether-ether-ketone) (PEEK) structure while maintaining mechanical performance; the distribution of pores being generated by the manufacturing process combined with a porogen leaching operation. Salt at 70 wt% concentration was used as a porogen in a dry blend with PEEK powder sintered in the powder bed fusion process. The printed porous PEEK structures were examined and evaluated by scanning electron microscopy, microcomputed tomography, and mechanical testing. The PEEK structures incorporating 70 wt% salt achieved 79-86% porosity, a compressive yield strength of 4.1 MPa, and a yield strain of ∼60%. Due to the salt leaching process, the PEEK porous frameworks were fabricated without the need to drastically reduce the process parameters (defined by the energy density [ED]), hence maintaining the structural integrity and good mechanical performance. The compression results highlighted that the performance is influenced by the printing orientation, level of the PEEK particle coalescence (controlled here by the ED), pore/cell wall thickness, and subsequently, the overall porosity framework. The porous printed PEEK structures could find potential uses in a wide range of applications from tissue engineering, filtration and separation to catalysts, drug release, and gas storage.

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来源期刊
3D Printing and Additive Manufacturing
3D Printing and Additive Manufacturing Materials Science-Materials Science (miscellaneous)
CiteScore
6.00
自引率
6.50%
发文量
126
期刊介绍: 3D Printing and Additive Manufacturing is a peer-reviewed journal that provides a forum for world-class research in additive manufacturing and related technologies. The Journal explores emerging challenges and opportunities ranging from new developments of processes and materials, to new simulation and design tools, and informative applications and case studies. Novel applications in new areas, such as medicine, education, bio-printing, food printing, art and architecture, are also encouraged. The Journal addresses the important questions surrounding this powerful and growing field, including issues in policy and law, intellectual property, data standards, safety and liability, environmental impact, social, economic, and humanitarian implications, and emerging business models at the industrial and consumer scales.
期刊最新文献
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