基于碳纳米管型油墨的印刷电子柔性基材预处理技术研究

Substrate Pre-treatment of Flexible Material for Printed Electronics with Carbon Nanotube Based Ink

0 引言 在印刷过程中，紫外固化可通过化学交联反应将基材上的液体悬浮液转化为固体状态，它具有节能、无溶剂挥发和加工快速等多重优势，可在不到1s的时间内完成固化，因此其适用于工业化生产。而喷墨印刷因其灵活性和可局部处理的优点被广泛用于印刷电子制造领域。如图1所示，喷墨印刷可作为一个工作单元插入生产线中，并可通过计算机控制印刷过程，快速生成图案。

In this work, an innovative solution was developed in order to make paper - based material, used traditionally in the packaging and labelling industries, compatible with the printing of functional conductive inks. In order to avoid the deterioration of the ink functionalities due to different paper properties, a UV - curing inkjettable primer layer was developed. This pre - treatment enables homogeneous surface properties such as smoothness, absorption capacity and surface energy to be obtained, for almost all the examined substrates. To confirm the positive impact of such pre - treatment, conductivity has been measured when using a new conductive ink, combining the processability of the PEDOT - PSS conductive polymer with the high electrical properties of carbon nanotubes （CNTs）. Significant improvement has been measured for all paper materials and similar conductivity （ close to reference PET film） has been obtained whatever the substrate involved. This pre - treatment now makes it possible to consider paper - based material as a potential substrate for printed electronics, In this case, the substrate adaptation technique offers an innovative solution to produce low -cost and flexible electronics.