School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China.
Key Laboratory of Computer Numerical Control Equipment Reliability, Ministry of Education, School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130012, China.
J Nanosci Nanotechnol. 2021 Mar 1;21(3):3249-3255. doi: 10.1166/jnn.2021.19147.
Electrohydrodynamic (EHD) jet printing enables rapid prototyping high-resolution and low-cost lines with width of micrometer or even nanometer. However, EHD printing always suffers from nozzle clogging when the nozzle inner-diameter decrease to micro-scale. Thus fabrication of low cost nozzles becomes significantly important. In this work, 50 μm wide and 12.5 μm deep PMMA (Polymethyl Methacrylate) nozzles were fabricated without using traditional expensive glass capillary pulling approach. To replicate PMMA nozzle with high precision, the embossing condition was optimized according to replication precision, the deformation rate, and maximum stress. To nearly fully bond PMMA nozzle with intact PMMA microchannel, the bonding condition was optimized according the bonding rate and dimension loss of PMMA microchannel. The availability of the fabricated PMMA nozzle was finally verified by EHD printing experiments.
静电喷射（EHD）打印技术能够快速成型出具有亚微米或纳米级宽度的高分辨率、低成本线条。然而，当喷嘴内径减小到微尺度时，EHD 打印总是会受到喷嘴堵塞的困扰。因此，制造低成本喷嘴变得非常重要。在这项工作中，我们没有使用传统的昂贵的玻璃毛细管拉伸方法，而是制造了 50μm 宽、12.5μm 深的 PMMA（聚甲基丙烯酸甲酯）喷嘴。为了以高精度复制 PMMA 喷嘴，根据复制精度、变形率和最大应力优化了压印条件。为了使 PMMA 喷嘴与完整的 PMMA 微通道几乎完全结合，根据 PMMA 微通道的结合率和尺寸损失优化了结合条件。最后，通过 EHD 打印实验验证了所制造的 PMMA 喷嘴的有效性。
