Stability of High Speed 3D Printing in Liquid-Like Solids
Stability of High Speed 3D Printing in Liquid-Like Solids
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DOI：
10.1021/acsbiomaterials.6b00184
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发表时间：
2016-10-01
影响因子：
5.8
通讯作者：
Angelini, Thomas E.
中科院分区：
文献类型：
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作者：
LeBlanc, Kyle J.;Niemi, Sean R.;Angelini, Thomas E.
流体不稳定性限制了特征在许多类型的3D打印中保持其形状的能力，因为液体墨水固化成书写结构。通过直接3D打印成连续的堵塞颗粒微凝胶，通过消除表面张力和体力来规避这些不稳定性。然而，这种类型的3D打印过程如果以高速执行，则可能受到惯性不稳定性的限制，其中湍流可能会在写入时破坏特征。在这里，我们设计并测试了一个高速3D打印实验系统，以确定当喷嘴以1 m/s平移时出现的不稳定性。我们发现，注入的材料的粘度可以控制胶体的不稳定性，我们发现一个额外的，意想不到的不稳定性附近的颗粒状微凝胶介质的顶面。
Fluid instabilities limit the ability of features to hold their shape in many types of 3D printing as liquid inks solidify into written structures. By 3D printing directly into a continuum of jammed granular microgels, these instabilities are circumvented by eliminating surface tension and body forces. However, this type of 3D printing process is potentially limited by inertial instabilities if performed at high speeds where turbulence may destroy features as they are written. Here, we design and test a high-speed 3D printing experimental system to identify the instabilities that arise when an injection nozzle translates at 1 m/s. We find that the viscosity of the injected material can control the Reynold's instability, and we discover an additional, unanticipated instability near the top surface of the granular microgel medium.