Systematic Design of Jettable Nanoparticle-Based Inkjet Inks: Rheology, Acoustics, and Jettability
Systematic Design of Jettable Nanoparticle-Based Inkjet Inks: Rheology, Acoustics, and Jettability
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DOI：
10.1021/la502903y
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发表时间：
2014-11-11
期刊：
影响因子：
3.9
通讯作者：
Subramanian, Vivek
中科院分区：
文献类型：
--
作者：
Nallan, Himamshu C.;Sadie, Jacob A.;Subramanian, Vivek
功能性墨水的按需喷墨打印在实现印刷电子、快速原型结构和大面积系统方面受到了广泛关注。尽管这种印刷方法保证了较高的处理速度和最小的基材污染，但该过程的性能通常受到墨水本身的流变参数的限制。有效的墨水设计必须解决许多问题，包括抑制咖啡环效应、在基材上正确固定墨滴、长期墨水可靠性，以及最重要的稳定的墨滴形成或可喷射性。在这项工作中，通过同时考虑最佳喷射条件和油墨流变学，我们开发并通过实验验证了毛细管数-韦伯数空间内的可喷射性窗口。此外，我们还演示了利用该窗口来预测性地调整基于纳米粒子的墨水流变学，以实现可喷射墨水。最后，我们研究了质量负载对喷射性的影响，以确定纳米粒子墨水设计的额外实际限制。
Drop-on-demand inkjet printing of functional inks has received a great deal of attention for realizing printed electronics, rapidly prototyped structures, and large-area systems. Although this method of printing promises high processing speeds and minimal substrate contamination, the performance of this process is often limited by the rheological parameters of the ink itself. Effective ink design must address a myriad of issues, including suppression of the coffee-ring effect, proper drop pinning on the substrate, long-term ink reliability, and, most importantly, stable droplet formation, or jettability. In this work, by simultaneously considering optimal jetting conditions and ink rheology, we develop and experimentally validate a jettability window within the capillary number-Weber number space. Furthermore, we demonstrate the exploitation of this window to adjust nanoparticle-based ink rheology predictively to realize a jettable ink. Finally, we investigate the influence of mass loading on jettability to establish additional practical limitations on nanoparticle ink design.