Larraza Izaskun, Vadillo Julen, Calvo-Correas Tamara, Tejado Alvaro, Olza Sheila, Peña-Rodríguez Cristina, Arbelaiz Aitor, Eceiza Arantxa
Materials + Technologies' Research Group (GMT), Department of Chemical and Environmental Engineering, Faculty of Engineering of Gipuzkoa, University of the Basque Country, Plaza Europa 1, 20018 Donostia-San Sebastian, Spain.
IPREM, UMR 5254, E2S UPPA, CNRS, Université de Pau et des Pays de l'Adour, Hélioparc 2, Avenue du Président Pierre Angot, 64000 Pau, France.
Polymers (Basel). 2021 Mar 9;13(5):839. doi: 10.3390/polym13050839.
3D printing has exponentially grown in popularity due to the personalization of each printed part it offers, making it extremely beneficial for the very demanding biomedical industry. This technique has been extensively developed and optimized and the advances that now reside in the development of new materials suitable for 3D printing, which may open the door to new applications. Fused deposition modeling (FDM) is the most commonly used 3D printing technique. However, filaments suitable for FDM must meet certain criteria for a successful printing process and thus the optimization of their properties in often necessary. The aim of this work was to prepare a flexible and printable polyurethane filament parting from a biocompatible waterborne polyurethane, which shows potential for biomedical applications. In order to improve filament properties and printability, cellulose nanofibers and graphene were employed to prepare polyurethane based nanocomposites. Prepared nanocomposite filaments showed altered properties which directly impacted their printability. Graphene containing nanocomposites presented sound enough thermal and mechanical properties for a good printing process. Moreover, these filaments were employed in FDM to obtained 3D printed parts, which showed good shape fidelity. Properties exhibited by polyurethane and graphene filaments show potential to be used in biomedical applications.
由于3D打印所提供的每个打印部件都具有个性化特点，其受欢迎程度呈指数级增长，这使其对要求极高的生物医学行业极为有益。这项技术已得到广泛发展和优化，目前在适合3D打印的新材料开发方面取得了进展，这可能为新应用打开大门。熔融沉积建模（FDM）是最常用的3D打印技术。然而，适用于FDM的长丝必须满足成功打印过程的某些标准，因此通常需要优化其性能。这项工作的目的是从一种生物相容性水性聚氨酯出发制备一种柔性且可打印的聚氨酯长丝，其在生物医学应用方面显示出潜力。为了改善长丝性能和可打印性，采用纤维素纳米纤维和石墨烯制备基于聚氨酯的纳米复合材料。制备的纳米复合长丝显示出改变的性能，这直接影响了它们的可打印性。含石墨烯的纳米复合材料具有足够良好的热性能和机械性能以实现良好的打印过程。此外，这些长丝被用于FDM以获得3D打印部件，这些部件显示出良好的形状保真度。聚氨酯和石墨烯长丝所展现的性能表明它们有潜力用于生物医学应用。
