School of Mechanical Engineering, Hanyang University, Seoul, South Korea.
School of Mechanical Engineering, Hanyang University, Seoul, South Korea.
J Mech Behav Biomed Mater. 2021 Jun;118:104412. doi: 10.1016/j.jmbbm.2021.104412. Epub 2021 Feb 24.
Polydimethylsiloxane (PDMS) polymer has been widely used in the biomedical fields because of its bio-compatibility, being used as sensors, medical equipment and tissue implants. The present study aims to synthesize and characterize micro lane-type surface patterns of PDMS polymers and evaluate their effects on mechanical properties for various applications in the bio-engineering field. Fabrication of surface patterns is achieved using fused filament fabrication in additive manufacturing, and the mechanical properties of the polymer specimens with the surface patterns are measured using tensile test. The surface patterns are rotated at different angles and changed into different shapes to change the anisotropic material properties of the PDMS specimens. This is achieved by changing the raster angles and modifying the fused filament paths during the additive manufacturing process. In addition, the application of the printed pattern to medical soft robot is presented. Owing to the anisotropic material properties, in-plane and out-of-plane actuation can be realized by attaching polymer patches with different lane-type surface patterns. The results of this study support the implementation of additive manufacturing for the rapid manufacture of scalable structures with anisotropic material properties for various applications.
聚二甲基硅氧烷（PDMS）聚合物由于其生物相容性而被广泛应用于生物医学领域，被用作传感器、医疗器械和组织植入物。本研究旨在合成和表征 PDMS 聚合物的微槽型表面图案，并评估其对各种生物工程领域应用的机械性能的影响。使用增材制造中的熔融沉积成型来制造表面图案，并且使用拉伸试验来测量具有表面图案的聚合物样品的机械性能。通过以不同角度旋转表面图案并将其改变成不同的形状来改变 PDMS 样品的各向异性材料性能。这是通过在增材制造过程中改变光栅角度和修改熔融沉积路径来实现的。此外，还介绍了打印图案在医用软体机器人中的应用。由于各向异性材料性能，可以通过将具有不同槽型表面图案的聚合物补丁附着来实现面内和面外驱动。本研究的结果支持了增材制造在各种应用中快速制造具有各向异性材料性能的可扩展结构的应用。
