When the inkjet printer jets inks, the nozzle of head plate is easily getting wet due to low surface energy of ink, high jetting frequency and high plate surface energy. As a result, non-ejection or diagonal ejection of ink occurs at the time of jetting, which causes non-uniform inkjet printing issues. To solve this problem, in current study, a selective hydrophobic coating of the inkjet head plate was applied using a microcontact printing (μCP) to enhance the uniformity of printing. Due to the characteristics of μCP, the hydrophobic self-assembled-monolayer was selectively deposited only on the surface of the head plate except the inside of the nozzle, which increases the contact angle of the inkjet head plate up to 105.45 ± 2.30°. This selective hydrophobic coating effectively decreases a jetting off-angle of the inkjet printer (Dimatix SG-1024) by ∼ 30 % while maintaining the same meniscus pressure and ink drop velocity as the unmodified conventional printer. The hydrophobic coating produced through this work has a facile regenerability, which is suitable for practical usage in inkjet printer. Furthermore, this method will increase the head life-time by reducing the frequency of the head plate care.

当喷墨打印机喷射墨水时，由于墨水的表面能低，喷射频率高和板表面能高，所以头板的喷嘴容易变湿。结果，在喷射时发生墨水的不喷射或对角喷射，这导致不均匀的喷墨打印问题。为了解决这个问题，在当前的研究中，使用微接触印刷（μCP）涂覆了喷墨头板的选择性疏水涂层，以增强印刷的均匀性。由于μCP的特性，疏水性自组装单分子层仅选择性沉积在头板的除喷嘴内部之外的表面上，这将喷墨头板的接触角提高到105.45±2.30°。这种选择性的疏水涂层可有效地将喷墨打印机（Dimatix SG-1024）的喷射角减小约30％，同时保持与未修改的常规打印机相同的弯液面压力和墨滴速度。通过这项工作生产的疏水性涂料具有容易再生的特性，适合实际用于喷墨打印机。此外，该方法将通过减少头板维护的频率来增加头的使用寿命。