The present study reports investigations on rheological, mechanical, thermal, tribological and morphological properties of feedstock filaments prepared with polylactic acid-polyether ketone ketone-hydroxyapatite-chitosan (PLA-PEKK-HAp-CS) composite for 3D printing of functional prototypes. The study consists of a series of melt processing operations on melt flow index (MFI) setup as per ASTM D-1238 for melt flow certainty followed by fixation of reinforcement composition/proportion as 94%PEKK-4%HAp-2%CS (B) by mass in PLA matrix (A). The blending of reinforcement and preparation of feedstock filament for fused deposition modeling (FDM) set up has been performed on commercial twin screw extruder (TSE). The results of study suggest that feedstock filaments prepared with blend of 95%A–5%B (by mass) at 200 °C processing temperature and 100 r/min rotational speed on TSE resulted into better tensile properties (35.9 MPa peak strength and 32.3 MPa break strength) with 6.24% surface porosity, 42.67 nm surface roughness (R_a) and acceptable heat capacity (2.14 J/g). However as regards to tribological behavior, the minimum wear of 316 µmwas observed for sample with poor tensile properties. As regards to crash application for scaffolds the maximum toughness of 1.16 MPa was observed for 85%A–15%B (by mass) at 200 °C processing temperature and 150 r/min rotational speed on TSE.

本研究报告了用聚乳酸-聚醚酮酮-羟基磷灰石-壳聚糖 (PLA-PEKK-HAp-CS) 复合材料制备的用于 3D 打印功能原型的原料长丝的流变学、机械、热、摩擦学和形态学特性的研究。该研究包括根据 ASTM D-1238 对熔体流动指数 (MFI) 设置的一系列熔体加工操作，以确保熔体流动确定性，然后将增强材料成分/比例固定为 94%PEKK-4%HAp-2%CS（B ) 在 PLA 基质 (A) 中的质量。已在商业双螺杆挤出机 (TSE) 上进行了用于熔融沉积建模 (FDM) 设置的增强材料的混合和原料长丝的制备。R _a ) 和可接受的热容量 (2.14 J/g)。然而，就摩擦学行为而言，对于拉伸性能较差的样品，观察到的最小磨损为 316 µm。至于支架的碰撞应用，在 200 °C 的加工温度和 150 r/min 的 TSE 转速下，观察到 85%A–15%B（按质量计）的最大韧性为 1.16 MPa。