Evaluating poly(ether ether ketone) powder recyclability for selective laser sintering applications
Evaluating poly(ether ether ketone) powder recyclability for selective laser sintering applications
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评估选择性激光烧结应用中聚醚醚酮粉末的可回收性
DOI：
10.1016/j.polymdegradstab.2021.109502
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发表时间：
2021
影响因子：
5.9
通讯作者：
Sobkowicz, Margaret J.
中科院分区：
文献类型：
--
作者：
Patel, Akanksha;Venoor, Varun;Yang, FeiFei;Chen, Xu;Sobkowicz, Margaret J.
聚醚醚酮（PEEK）由于其上级力学性能、热性能和生物相容性而越来越多地用于选择性激光烧结（SLS）。众所周知，选择性激光烧结（SLS）粉末的性能决定了零件的加工性能和质量。SLS打印过程将PEEK床/原料暴露于可变的高温（高于300 °C）持续延长的时间。这种热历史对零件质量的影响尚不清楚。这项工作通过光谱，形态学和流变学表征评估热处理PEEK粉末中发生的变化。发现在前两个小时内结晶度略有增加，但粒度和形状几乎保持不变。热处理还导致PEEK粉末的熔体粘度显著增加，并且其流动性略有改善。了解这些变化有助于通过回收SLS打印中使用的部分PEEK粉末来减少浪费。
Poly(ether ether ketone) (PEEK) is increasingly used in selective laser sintering (SLS) due to its superior mechanical and thermal properties and biocompatibility. It is well known that the properties of selective laser sintering (SLS) powder govern the processability and quality of the parts. The SLS printing process exposes the PEEK bed/feedstock to variable elevated temperatures (above 300 °C) for a prolonged time. The effect of this thermal history on the part quality is unknown. This work evaluates the changes that occur in thermally treated PEEK powder through spectroscopic, morphological, and rheological characterizations. It was found that crystallinity increased marginally within the first two hours, but particle size and shape remained virtually unchanged. The thermal treatment also resulted in a significant increase in the melt viscosity of the PEEK powder, and its flowability slightly improved. Understanding these changes could help to reduce waste through recycling of some portion of PEEK powders used in SLS printing.
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