通过248 nm KrF准分子激光辐照,可以快速地制备PA2200材料三维(3D)打印件亲水性表面,打印件表面接触角从120°减小至70°,且辐照后打印件相结构未发生变化。通过X射线衍射仪、拉曼光谱仪、扫描电子显微镜和X射线光电子能谱仪等表征手段,进行打印件的表面形貌、微观结构、极性官能团种类和数量的变化分析及Cassie-Baxter模型分析,结果表明KrF准分子激光辐照PA2200材料3D打印件可以使打印件表面变得光滑,同时可以产生C=O双键亲水性基团,改善并调控打印件表面浸润性。

The hydrophilic surfaces of PA2200 three-dimensional (3D) printing parts are prepared quickly through 248 nm KrF excimer laser irradiation, whose contact angles decrease from 121° to 70° and phase structures do not change after irradiation. With the calibration tools of X-ray diffractometer, Raman spectroscopy, scanning electron microscope, X-ray photoelectron spectroscopy and so on, the surface morphologies and microstructures of printing parts, number and types of polar functional groups are analyzed. The Cassie-Baxter model is also studied. The experimental results show that KrF excimer laser irradiation can not only make PA2200 3D printing part surfaces smooth, but also simultaneously generate C=O double hydrophilic groups, and thus the surface wettability of PA2200 3D printing parts are improved and controlled.