Characterization of the Direct Write Inkjet Printing Process for Automated Fabrication of PEDOT: PSS Thin Films
Characterization of the Direct Write Inkjet Printing Process for Automated Fabrication of PEDOT: PSS Thin Films
复制标题
用于自动制造 PEDOT: PSS 薄膜的直写喷墨打印工艺的表征
DOI：
10.1115/msec2022-85409
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Popa, Dan O.
中科院分区：
文献类型：
--
作者：
Morice, Sara;Sherehiy, Andriy;Wei, Danming;Popa, Dan O.
直写喷墨打印是一种多功能的增材制造技术，允许制造尺寸从纳米到厘米级的多尺度结构。由于新型点胶工具的开发，这一点成为可能，能够以纳升体积控制和精确沉积粘度范围广泛（1 - 50 000 mPas）的流体。因此，喷墨印刷已被认为是几种已建立的制造方法（包括洁净室制造）的潜在低成本替代品。在本文中，我们提出了一个表征研究PEDOT：PSS聚合物油墨沉积印刷过程中实现的帮助下，一个自动化的，定制的直写喷墨系统。PEDOT：PSS是一种具有良好成膜能力的高导电油墨。因此，应用包括在用于触觉（触摸）传感器的柔性基板上印刷薄膜。我们应用田口实验设计（DOE）方法来产生PEDOT：PSS油墨点胶参数的最佳设置，以研究它们对所得墨滴直径的影响。我们通过实验确定，具有最小厚度的印刷薄膜的期望结果与1）分配流体的最小体积和2）预处理步骤的存在直接相关，即Kapton衬底的空气等离子体处理。结果表明，制备的油墨存款最小直径为482 μm，薄膜厚度约为300 nm，具有良好的重复性。
Direct write Inkjet Printing is a versatile additive manufacturing technology that allows for the fabrication of multiscale structures with dimensions spanning from nano to cm scale. This is made possible due to the development of novel dispensing tools, enabling controlled and precise deposition of fluid with a wide range of viscosities (1 – 50 000 mPas) in nanoliter volumes. As a result, Inkjet printing has been recognized as a potential low-cost alternative for several established manufacturing methods, including cleanroom fabrication. In this paper, we present a characterization study of PEDOT: PSS polymer ink deposition printing process realized with the help of an automated, custom Direct Write Inkjet system. PEDOT: PSS is a highly conductive ink that possesses good film forming capabilities. Applications thus include printing thin films on flexible substrates for tactile (touch) sensors. We applied the Taguchi Design of Experiment (DOE) method to produce the optimal set of PEDOT:PSS ink dispensing parameters, to study their influence on the resulting ink droplet diameter. We experimentally determined that the desired outcome of a printed thin film with minimum thickness is directly related to 1) the minimum volume of dispensed fluid and 2) the presence of a preprocessing step, namely air plasma treatment of the Kapton substrate. Results show that an ink deposit with a minimum diameter of 482 μm, and a thin film with approximately 300 nm thickness were produced with good repeatability.