Zhao Yu-Qing, Yang Ji-Hao, Ding Xiaokang, Ding Xuejia, Duan Shun, Xu Fu-Jian
State Key Laboratory of Chemical Resource Engineering, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology), Ministry of Education, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China.
Bioact Mater. 2020 Feb 20;5(2):185-191. doi: 10.1016/j.bioactmat.2020.02.006. eCollection 2020 Jun.
Fused deposition modelling (FDM) is a commonly used 3D printing technology. The development of FDM materials was essential for the product quality of FDM. In this work, a series of polycaprolactone (PCL)-based composites for low-temperature FDM were developed. By melt blending technique, different ratios of starch were added into PCL to improve the performances of FDM, and the printability, tensile strength, rheological properties, crystallization behaviors and biological performances of the composites were studied. The PCL/starch composite had the best performance in FDM process with the starch ratio of 9 ph at 80-90 °C. The melting strength and solidification rate of PCL/starch composites were improved. The starch also increased the crystallization temperature, degree of crystallinity and crystallization rate of PCL/starch composites, while had no negative effects on the tensile strength of PCL. Due to the low printing temperature, various kinds of bioactive components were added into PCL/starch composites for preparation of antibacterial and biocompatible materials for FDM. The present work provides a new method to develop novel low-temperature FDM materials with various functions.
熔融沉积建模（FDM）是一种常用的3D打印技术。FDM材料的发展对FDM的产品质量至关重要。在这项工作中，开发了一系列用于低温FDM的聚己内酯（PCL）基复合材料。通过熔融共混技术，将不同比例的淀粉添加到PCL中以改善FDM的性能，并研究了复合材料的可打印性、拉伸强度、流变性能、结晶行为和生物学性能。PCL/淀粉复合材料在80-90°C下淀粉比例为9ph时在FDM工艺中表现最佳。PCL/淀粉复合材料的熔体强度和固化速率得到提高。淀粉还提高了PCL/淀粉复合材料的结晶温度、结晶度和结晶速率，同时对PCL的拉伸强度没有负面影响。由于打印温度较低，将各种生物活性成分添加到PCL/淀粉复合材料中，以制备用于FDM的抗菌和生物相容性材料。本工作提供了一种开发具有各种功能的新型低温FDM材料的新方法。
