Zhou Haihua, Chang Rui, Reichmanis Elsa, Song Yanlin
Key laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
Beijing National Laboratory for Molecular Science (BNLMS), Beijing 100190, China.
Langmuir. 2017 Jan 10;33(1):130-137. doi: 10.1021/acs.langmuir.6b03820. Epub 2016 Dec 21.
The resolution of inkjet printing technology is determined by wetting and evaporation processes after the jet drop contacts the substrate. Here, the wetting of different picoliter solubilized polymer droplets jetting onto one-end-closed porous alumina was investigated. The selected polymers are commonly used in inkjet ink. The synergistic effects of the hierarchical structure and substrate surface modification were used to control the behavior of polymer-based ink drops. A model that invokes the effect of surface tension was applied to calculate the amount of polymer solution penetrating into the pores. The calculation corroborates experimental observations and shows that the volume of polymer solution in the pores increases with an increase in pore radius and depth, resulting in less solution remaining on the substrate surface. The structure of the porous substrate coupled with intrinsic polymer properties and surface modifications all contribute to the resolution that can be achieved via inkjet printing.
喷墨打印技术的分辨率取决于墨滴与基底接触后的润湿和蒸发过程。在此，研究了不同皮升的溶解聚合物液滴喷射到一端封闭的多孔氧化铝上的润湿情况。所选聚合物常用于喷墨油墨中。利用分级结构和基底表面改性的协同效应来控制聚合物基墨滴的行为。应用一个考虑表面张力作用的模型来计算渗透到孔隙中的聚合物溶液量。计算结果证实了实验观察结果，并表明孔隙中聚合物溶液的体积随孔隙半径和深度的增加而增加，从而使残留在基底表面的溶液减少。多孔基底的结构、聚合物的固有特性以及表面改性都有助于通过喷墨打印实现的分辨率。
