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Design optimization of ink in electrohydrodynamic jet printing: Effect of viscoelasticity on the formation of Taylor cone jet

机译：电动流体喷射印刷中油墨的设计优化：粘弹性对泰勒锥喷射形成的影响

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摘要

The formation of Taylor cone jet is a key process in electrohydrodynamic printing that is used to produce high resolution patterns. Even though the inks are complex fluids composed of particles, binder, and solvent, most of previous researches have assumed the ink as a Newtonian fluid. In this study, we investigate the effect of viscoelasticity of the ink on Taylor cone jet using two model systems designed to control the elasticity and viscosity of the ink independently. The elasticity and viscosity improve the stability by expanding the operating windows for Taylor cone jet The results can be summarized in terms of two parameters: elasticity parameter, ξ, and viscosity parameter, χ, The increase in elasticity widens the range of voltage for Taylor cone jet zone, while the range of flow rate remains independent of elasticity. The effect of elasticity is dominant for ξ＞ 1 while it is nearly negligible for ξ＜ 1. When the viscosity is increased, the Taylor cone jet zone is widened mainly by the flow rate when χ＜ 1, while the voltage stabilizes the Taylor cone jet for χ＞ 1. This study will contribute to the optimal design of EHD printing ink by providing the operating window maps in terms of material properties.
机译：泰勒锥射流的形成是电动流体动力印刷中的关键过程，用于产生高分辨率图案。即使油墨是由颗粒，粘合剂和溶剂组成的复杂流体，大多数以前的研究都将油墨假定为牛顿流体。在这项研究中，我们使用设计为独立控制墨水的弹性和粘度的两个模型系统，研究了墨水的粘弹性对泰勒锥喷射的影响。弹性和粘度通过扩展泰勒锥喷射的操作窗口来提高稳定性。结果可以用两个参数来概括：弹性参数ξ和粘度参数χ，弹性的增加扩大了泰勒锥的电压范围射流区，而流速范围则与弹性无关。弹性的影响在ξ＞ 1时占主导地位，而在ξ＜1时几乎可以忽略不计。当粘度增加时，当χ＜1时，泰勒锥喷射区主要受流量的影响而变宽，而电压使泰勒锥稳定χ＞ 1的射流。本研究将通过提供有关材料属性的操作窗口图，为EHD油墨的优化设计做出贡献。

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  • 来源
    《Materials & design》 |2016年第1期|109-115|共7页
  • 作者

    Milim Yu; Kyung Hyun Ahn; Seung Jong Lee;

  • 作者单位

    School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, Seoul 151-744, Republic of Korea;

    School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, Seoul 151-744, Republic of Korea;

    School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, Seoul 151-744, Republic of Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ink viscoelasticity; Taylor cone jet; Operating window map; Electrohydrodynamic printing;

    机译：油墨粘弹性;泰勒锥射流;操作窗口图;电液动力印刷;

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