在elasto-viscoplastic矩阵中嵌入牛顿流体的3D打印
Hyejoon Jun1, Junil Ryu1, Jikang Kong1
1Department of Mechanical Engineering, KAIST, Daejeon 34141, South Korea.
ACS applied materials & interfaces
|November 7, 2025
概括
这项研究提出了嵌入式3D打印 (EM3D) 牛顿流体的新框架. 我们开发了使用曲针和稳定性标准的策略,以克服矩阵产量和界面张力,从而实现可靠的打印.
科学领域:
- 材料科学与工程 材料科学与工程
- 流体动力学 流体动力学
- 增材制造 增材制造 增材制造
背景情况:
- 嵌入式3D打印 (EM3D) 允许在支矩阵内对软材料进行自由形式的图案设计.
- 与剪切稀释或粘性塑料油墨不同,打印牛顿流体是具有挑战性的,因为它具有矩阵产量和雷利高原不稳定性.
研究的目的:
- 研究使用EM3D打印牛顿流体 (油,液体金属) 的挑战.
- 开发策略来克服矩阵收益率和雷利-普拉托不稳定性,以获得牛顿墨水可靠的EM3D.
主要方法:
- 在EM3D实验中使用了elasto-viscoplastic Laponite矩阵.
- 采用粒子图像速度测量技术用于流量可视化和流学用于产量值的确定.
- 研究了直针和曲针的几何形状,并推导出了界面张力和屈服应力的理论稳定性标准.
主要成果:
- 在针周围的矩阵屈服尺度与特征剪切率与屈服值的比率.
- 与直针相比,曲针的几何结构显著降低了矩阵产量,并提高了打印保真度.
- 衍生的稳定性标准 (τY Γ/d) 准确地预测了具有不同表面张力的油墨的打印能力.
结论:
- 统一的设计框架结合了学和几何策略,使得牛顿油墨的EM3D可靠.
- 这些发现为EM3D提供了对流体矩阵相互作用的基本见解.
- 这项工作扩大了EM3D的材料范围,为软电子和生物打印提供了实用指南.
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