基于材料挤压的超级工程塑料增材制造中喷嘴温度对气体排放和机械性能的影响

IF 5.3 3区 工程技术 Q1 ENGINEERING, MANUFACTURING
Seong Je Park, Ji Sun Lee, Ji Eun Lee, Seung Ki Moon, Yong Son, Suk-Hee Park
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引用次数: 0

摘要

在涉及热塑性聚合物的热加工过程中,气体排放会对环境和健康造成严重影响。这一问题也延伸到材料挤压(MEX)增材制造(AM)中,这是一种热加工工艺。因此,研究 MEX 增材制造过程中的气体排放至关重要。本研究侧重于超级工程塑料(SEP),如聚醚醚酮、聚砜和聚醚酰亚胺。使用便携式排放测量装置分析了 MEX AM 在不同喷嘴温度下排放的总挥发性有机化合物 (TVOC) 和甲醛 (HCHO)。此外,还评估了在纵向和横向沉积方向制作的 SEP 试样拉伸强度的各向异性。总体而言,根据 MEX AM 期间的喷嘴温度,SEP 释放的 TVOC 和 HCHO 分别在未检测到(N/D)至 0.595 mg/m3 和 N/D 至 0.139 mg/m3 的范围内。此外,纵向沉积方向的拉伸强度从 59.0 到 83.4 兆帕不等,横向沉积方向的拉伸强度从 19.2 到 55.7 兆帕不等。降低喷嘴温度不仅能减少气体排放,还能降低所有 SEP 的拉伸强度。不过,战略性地使用纵向沉积可以减轻拉伸强度的降低。为了证明这一点,介绍了一个涉及沃伦桁架桥制造的案例研究。该研究为在调制条件下使用 SEP 的 MEX 沉积策略提供了指导,旨在最大限度地减少气体排放,同时将抗拉强度保持在体积试样强度的 81.1% 到 88.7% 之间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of Nozzle Temperature on Gas Emissions and Mechanical Properties in Material Extrusion-based Additive Manufacturing of Super Engineering Plastics

Gas emissions pose significant environmental and health concerns in thermal processes involving thermoplastic polymers. This issue also extends to material extrusion (MEX) additive manufacturing (AM), which is a thermal process. Therefore, it is crucial to examine gas emissions during MEX AM. This study focused on super engineering plastics (SEPs) such as polyetheretherketone, polysulfone, and polyetherimide. A portable emission-measuring device was employed to analyze total volatile organic compounds (TVOCs) and formaldehyde (HCHO) emitted during MEX AM at various nozzle temperatures. Additionally, the anisotropy of tensile strengths in the SEP specimens fabricated in the longitudinal and transverse deposition directions was evaluated. Overall, the SEPs emitted TVOCs and HCHO within the range from not detected (N/D) to 0.595 mg/m3 and from N/D to 0.139 mg/m3, respectively, based on the nozzle temperature during MEX AM. Moreover, the tensile strengths varied from 59.0 to 83.4 MPa in the longitudinal deposition direction and from 19.2 to 55.7 MPa in the transverse deposition direction. Lower nozzle temperatures not only resulted in reduced gas emissions but also led to lower tensile strength in all the SEPs. However, the strategic use of longitudinal deposition can mitigate the reduction in tensile strength. To demonstrate this, a case study involving the fabrication of a Warren truss bridge was presented. This study provides guidelines for the deposition strategy in MEX using SEPs under AM conditions, aiming to minimize gas emissions while maintaining a tensile strength ranging from 81.1% to 88.7% of the bulk specimen strength.

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来源期刊
CiteScore
10.30
自引率
9.50%
发文量
65
审稿时长
5.3 months
期刊介绍: Green Technology aspects of precision engineering and manufacturing are becoming ever more important in current and future technologies. New knowledge in this field will aid in the advancement of various technologies that are needed to gain industrial competitiveness. To this end IJPEM - Green Technology aims to disseminate relevant developments and applied research works of high quality to the international community through efficient and rapid publication. IJPEM - Green Technology covers novel research contributions in all aspects of "Green" precision engineering and manufacturing.
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