Electrohydrodynamic (EHD) jet printing with a circulating dual-channel nozzle
Electrohydrodynamic (EHD) jet printing with a circulating dual-channel nozzle
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DOI：
10.1088/1361-6439/aafd9e
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发表时间：
2019-03-01
影响因子：
2.3
通讯作者：
Chen, Da-Ren
中科院分区：
文献类型：
--
作者：
Li, Zhen;Al-Milaji, Karam Nashwan;Chen, Da-Ren
电流体动力（EHD）打印是一种低成本、高效率的高分辨率特征增材制造技术。EHD打印的主要问题之一是喷嘴堵塞，这通常发生在高浓度胶体油墨的打印中。我们提出了一种新的EHD打印喷嘴配置与双通道，使油墨流动循环，以解决上述问题。在这项研究中，我们专注于这种新的EHD打印工艺的弯月面动力学和喷射特性。讨论了连续射流、脉动射流和脉动液滴等不同的射流模式与电场强度和喷嘴结构的关系。柔性基板上的点图案已经通过在脉动液滴模式下操作时的新EHD印刷工艺进行了演示。
Electrohydrodynamic (EHD) printing is a promising technique for additive manufacturing of high-resolution features with low cost and high efficiency. One of the major issues in EHD printing is nozzle clogging, which often occurs in the printing of colloidal inks with high concentrations. We proposed a new EHD printing nozzle configuration with dual channels to enable ink flow circulation to resolve the above issue. In this study, we focused on the meniscus dynamics and jetting characteristics of this new EHD printing process. Various jetting modes, i.e. continuous jet, pulsating jet, and pulsating droplet, as a function of the electric field intensity and nozzle configuration, were discussed. Dot patterns on a flexible substrate have been demonstrated via the new EHD printing process when operated at the pulsating droplet mode.