Viscoplastic Matrix Materials for Embedded 3D Printing,ACS Applied Materials & Interfaces

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Viscoplastic Matrix Materials for Embedded 3D Printing
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-03-01 00:00:00 , DOI: 10.1021/acsami.7b19818
Abigail K. Grosskopf ₁ , Ryan L. Truby ₂ , Hyoungsoo Kim _{1,

3} , Antonio Perazzo ₁ , Jennifer A. Lewis ₂ , Howard A. Stone ₁

Affiliation

Embedded three-dimensional (EMB3D) printing is an emerging technique that enables free-form fabrication of complex architectures. In this approach, a nozzle is translated omnidirectionally within a soft matrix that surrounds and supports the patterned material. To optimize print fidelity, we have investigated the effects of matrix viscoplasticity on the EMB3D printing process. Specifically, we determine how matrix composition, print path and speed, and nozzle diameter affect the yielded region within the matrix. By characterizing the velocity and strain fields and analyzing the dimensions of the yielded regions, we determine that scaling relationships based on the Oldroyd number, Od, exist between these dimensions and the rheological properties of the matrix materials and printing parameters. Finally, we use EMB3D printing to create complex architectures within an elastomeric silicone matrix. Our methods and findings will both facilitate future characterization of viscoplastic matrices and motivate the development of new materials for EMB3D printing.

中文翻译：

用于嵌入式3D打印的粘塑性基体材料

嵌入式三维（EMB3D）打印是一种新兴技术，可以自由形式制造复杂的体系结构。在这种方法中，喷嘴在围绕并支撑图案化材料的软基质内全方位移动。为了优化打印保真度，我们研究了基质粘塑性对EMB3D打印过程的影响。具体来说，我们确定基质成分，打印路径和速度以及喷嘴直径如何影响基质内的屈服区域。通过表征速度场和应变场并分析屈服区域的尺寸，我们确定基于Oldroyd数Od的比例关系在这些尺寸与基体材料的流变特性和印刷参数之间存在。最后，我们使用EMB3D打印在弹性硅树脂基质内创建复杂的体系结构。我们的方法和发现既可以促进粘塑性基体的未来表征，又可以促进EMB3D打印新材料的开发。

更新日期：2018-03-01

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