Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments
Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments
复制标题
DOI：
10.1002/ppap.201800032
复制
发表时间：
2018-06
影响因子：
3.5
通讯作者：
Alaa Almansoori;R. Masters;K. Abrams;J. Schäfer;T. Gerling;C. Majewski;C. Rodenburg
中科院分区：
文献类型：
--
作者：
Alaa Almansoori;R. Masters;K. Abrams;J. Schäfer;T. Gerling;C. Majewski;C. Rodenburg
用两种不同的常压等离子体射流(APPJ)，即KINPen(K-APPJ)和H-APPJ(H-APPJ)，将聚酰胺12(PA12)粉末暴露在低压空气等离子体处理(LP-PT)中3h和几分钟。用扫描电子显微镜(SEM)、热台显微镜(HSM)和傅立叶变换红外光谱(FTIR)观察了等离子体处理后的PA12粉末的化学和物理变化，发现等离子体处理前后的PA12粉末发生了显著变化。经LP-PT处理后，PA12的润湿性增加，孔洞较大，密度较高，这是由于等离子体暴露过程中表面功能化和材料去除的结果。然而，在激光烧结的典型加热条件下，它表现出较差的熔融行为。相比之下，短暂的PJ处理显示出类似的孔隙率变化，但关键是保留了PA12粉末的良好熔融特性。
Polyamide 12 (PA12) powder was exposed for up to 3 h to low pressure air plasma treatment (LP‐PT) and several minutes by two different atmospheric pressure plasma jets (APPJ) i.e., kINPen (K‐APPJ) and Hairline (H‐APPJ). The chemical and physical changes resulting from LP‐PT were observed by a combination of Scanning Electron Microscopy (SEM), Hot Stage Microscopy (HSM) and Fourier transform infrared spectroscopy (FTIR), which demonstrated significant changes between the plasma treated and untreated PA12 powders. PA12 exposed to LP‐PT showed an increase in wettability, was relatively porous, and possessed a higher density, which resulted from the surface functionalization and materials removal during the plasma exposure. However, it showed poor melt behavior under heating conditions typical for Laser Sintering. In contrast, brief PJ treatments demonstrated similar changes in porosity, but crucially, retained the favorable melt characteristics of PA12 powder.