Abstract In this article, the thermal and mechanical properties of hydroxyapatite (HA)/polyetheretherketone (PEEK) nanocomposites were investigated. The surface of the HA particles was modified by stearic acid. Subsequently, the modified HA and PEEK were ultrasonically dispersed in ethanol and then subjected to drying and ball milling treatments. By controlling the concentration of modified HA, HA/PEEK nanocomposite powders containing various amounts of modified HA were successfully prepared. The tensile strength, impact strength, and flexural strength of the nanocomposite reached maximum values at 2.5 wt% HA and were 18.5%, 38.2%, and 5.7% higher than those of the pure PEEK, respectively. Moreover, the flexural modulus of the HA/PEEK nanocomposites increased at 2.5 wt% HA and was approximately 30% higher than that of the pure PEEK. The thermal property measurements (differential scanning calorimetry and thermogravimetric analysis) showed that the nanocomposites with 2.5 wt%-modified HA exhibited enhanced thermal stability as compared to the pure PEEK, showing potential for selective laser sintering.

中文翻译：

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用于选择性激光烧结的羟基磷灰石/聚醚醚酮纳米复合材料：热性能和机械性能

摘要 本文研究了羟基磷灰石 (HA)/聚醚醚酮 (PEEK) 纳米复合材料的热性能和机械性能。HA颗粒的表面被硬脂酸改性。随后，将改性后的 HA 和 PEEK 超声分散在乙醇中，然后进行干燥和球磨处理。通过控制改性HA的浓度，成功制备了含有不同量改性HA的HA/PEEK纳米复合粉体。纳米复合材料的拉伸强度、冲击强度和弯曲强度在 2.5 wt% HA 时达到最大值，分别比纯 PEEK 高 18.5%、38.2% 和 5.7%。此外，HA/PEEK 纳米复合材料的弯曲模量在 2.5 wt% HA 时增加，比纯 PEEK 的弯曲模量高约 30%。