Garrido B, Albaladejo-Fuentes V, Cano I G, Dosta S
Department of Materials Science and Physical Chemistry, University of Barcelona, Martí i Franquès, 1-1, 08028 Barcelona, Spain.
J Therm Spray Technol. 2022;31(1-2):186-196. doi: 10.1007/s11666-021-01312-w. Epub 2022 Jan 10.
Cold gas spray (CGS) technology has allowed the development of biofunctional coatings composed of 45S5 and polyetheretherketone (PEEK). The combination of a bioactive glass material embedded in a polymeric matrix makes this composite an interesting material for orthopedic applications since this composite meets the biomechanical and biological requirements of an implant. In the present study, blends of bioactive glass 45S5 and PEEK powder with different granulometry and 45S5/PEEK ratio have been prepared. These mixtures of powders have been deposited onto PEEK substrates by CGS with the goal of incorporating a bioactive additive to the biocompatible polymer, which can improve the bone-implant interaction of PEEK. The deposition efficiency (DE) of the coatings has been evaluated, and from the results obtained, it was possible to conclude that DE is significantly affected by the granulometry and by the 45S5/PEEK ratio of the blends. By scanning electron microscopy (SEM) inspection, it was observed that the use of blends with high 45S5/PEEK ratio lead to the deposition of coatings with high content of 45S5. Finally, the friction behavior of the coatings was analyzed performing ball-on-disk tests and these experiments showed that the presence of glass particles has a beneficial role in the wear resistance.
冷气体喷涂（CGS）技术推动了由45S5和聚醚醚酮（PEEK）组成的生物功能涂层的发展。嵌入聚合物基体中的生物活性玻璃材料的组合使这种复合材料成为骨科应用中一种有趣的材料，因为这种复合材料满足了植入物的生物力学和生物学要求。在本研究中，制备了具有不同粒度和45S5/PEEK比例的生物活性玻璃45S5和PEEK粉末的混合物。这些粉末混合物已通过冷气体喷涂沉积到PEEK基材上，目的是将生物活性添加剂引入生物相容性聚合物中，从而改善PEEK与骨的植入物相互作用。对涂层的沉积效率（DE）进行了评估，从获得的结果可以得出结论，沉积效率受混合物的粒度和45S5/PEEK比例的显著影响。通过扫描电子显微镜（SEM）检查，观察到使用高45S5/PEEK比例的混合物会导致沉积具有高45S5含量的涂层。最后，通过球盘试验分析了涂层的摩擦行为，这些实验表明玻璃颗粒的存在对耐磨性有有益作用。
