PA12 Powder Recycled from SLS for FDM
PA12 Powder Recycled from SLS for FDM
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DOI：
10.3390/polym11040727
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发表时间：
2019-04-01
期刊：
影响因子：
5
通讯作者：
Wei, Qinya
中科院分区：
文献类型：
--
作者：
Feng, Li;Wang, Yan;Wei, Qinya
本研究利用选择性激光烧结（SLS）后回收的聚酰胺12 （PA12）粉末制成长丝，用于熔融沉积建模（FDM）。与新鲜PA12相比，再生PA12粉末的熔体流动速率（MFR）下降了77%，但力学性能仅略有下降。在FDM中，改变打印速度和建筑方向，测试打印件的性能。如果打印速度太快或太慢，则会影响零件的机械性能，并且存在最佳速度范围。用回收粉末制成的印刷试样的拉伸强度、弯曲模量和冲击强度分别达到用新鲜PA12制成的x方向试样的95%、85%和87%。对于不同方向印刷的试样，x方向印刷的试样力学性能最好，而结晶性能则相反。扫描电镜（SEM）图像显示，打印的测试样品具有良好的致密性和力学性能，基本未观察到分层现象。
In this study, Polyamide 12 (PA12) powder recycled after selective laser sintering (SLS) was made into filaments for fused deposition modelling (FDM). Compared with fresh PA12, the melt flow rate (MFR) of the recycled PA12 powder decreased by 77%, but the mechanical properties were only slightly reduced. In FDM, the printing speed and building orientation were changed, and the performance of the printed parts was tested. If the printing speed is too fast or too slow, the mechanical properties of the parts will be affected, and there is an optimal speed range. The tensile strength, flexural modulus, and impact strength of a printed test sample made from recycled powder reached 95%, 85%, and 87% of an x-direction test sample made from fresh PA12, respectively. For test samples printed from different orientations, the mechanical properties of the test samples printed in the x-direction were the best, while the crystallization performance was the opposite. Scanning electron microscope (SEM) images show that the printed test sample had good compactness and mechanical properties, and the delamination phenomenon was basically not observed.