通过粘合剂喷射工艺从聚合物粉末床熔融增材制造工艺中回收残余聚酰胺(PA12)

IF 4.3 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Cesar O. Balderrama-Armendáriz, Sergio Esteban Arbelaez-Rios, Santos-Adriana Martel-Estrada, A. Maldonado-Macías, Eric MacDonald, J. Aguilar-Duque
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引用次数: 0

摘要

本研究旨在提出在另一种 AM 工艺(粘合剂喷射)中重复使用 PA12(粉末),这种工艺对粉末在激光系统中多次循环后的化学和机械降解不太敏感。使用傅立叶变换红外光谱、扫描电子显微镜、热重分析以及拉伸和压缩应力应变测试等技术进行了分析。此外,还测定了新混合物的表面粗糙度、颜色、硬度和密度,以发现其物理特性。研究结果表明,废弃粉末 PA12 与半水硫酸钙(CSH)的混合产生了适当的颗粒分布,PA12 颗粒呈圆形,改善了粉末的流动性。观察到的微孔小于 60 µm,有利于粘合剂和浸润剂在三维部件上的渗透。经环氧树脂后处理的 60/40(CSH-PA12)混合物在机械测试、凹凸度和硬度结果中被认为是粘结性最好的混合物。新的 CSH-PA12 混合物比粘结剂喷射技术中常用的 CSH 粉末更轻、更强。在一个成熟的工艺流程中,以方便和经济的方式实现了 PA12 废料的新颖再利用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Recovery of residual polyamide (PA12) from polymer powder bed fusion additive manufacturing process through a binder jetting process
Purpose This study aims to propose the reuse of PA12 (powder) in another AM process, binder jettiinng, which is less sensitive to the chemical and mechanical degradation of the powder after multiple cycles in the laser system. Design/methodology/approach The experimental process for evaluating the reuse of SLS powders in a subsequent binder jetting process consists of four phases: powder characterization, bonding analysis, mixture testing and mixture characteristics. Analyses were carried out using techniques such as Fourier Transform Infrared Spectroscopy, scanning electron microscopy, thermogravimetric analysis and stress–strain tests for tension and compression. The surface roughness, color, hardness and density of the new mixture were also determined to find physical characteristics. A Taguchi design L8 was used to search for a mixture with the best mechanical strength. Findings The results indicated that the integration of waste powder PA12 with calcium sulfate hemihydrate (CSH) generates appropriate particle distribution with rounded particles of PA12 that improve powder flowability. The micropores observed with less than 60 µm, facilitated binder and infiltrant penetration on 3D parts. The 60/40 (CSH-PA12) mixture with epoxy resin postprocessing was found to be the best-bonded mixture in mechanical testing, rugosity and hardness results. The new CSH-PA12 mixture resulted lighter and stronger than the CSH powder commonly used in binder jetting technology. Originality/value This study adds value to the polymer powder bed fusion process by using its waste in a circular process. The novel reuse of PA12 waste in an established process was achieved in an accessible and economical manner.
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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
期刊介绍: ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. 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 science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/​Abstracted: Web of Science SCIE Scopus CAS INSPEC Portico
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