the Industrial S&T Project of Shannxi province (No.2022GY-384；No.2022-LL-JBGS-07；)
分别以银纳米颗粒和银纳米线为导电组份,以BYK-333为表面助剂,以乙二醇为溶剂制备出两类喷墨打印型导电墨水,采用MICROPLTTER Ⅱ型微纳米沉积系统在柔性透明基底上打印了导电线路,研究了打印工艺、热烧结固化、封装等对两种打印电路的导电性、耐候性和扰度等性能的影响。结果表明,打印机喷头口径和墨水与基底接触角是决定导电电路线宽精度的关键因素,热烧结处理可以提高银纳米颗粒柔性电路的导电性,在160℃烧结30 min时,电阻率下降到16.4 μΩ.cm,在空气中放置90天后保持导电性能不变,1000次弯折后电阻率上升12.4%；随着打印次数增加,银纳米线打印电路的导电性不断增加,打印9次得到的打印直线单位电阻为88.9 Ω/cm,而随着烧结温度和时间的增加电路导电性下降,PDMS封装可以极大地提高打印电路的稳定性,在空气中放置90天并弯折1000次后导电性能保持不变,表明基于银纳米材料导电墨水及微纳米沉积系统可以实现高性能和高精度柔性电路的稳定打印。
Two kinds of ink-jet printing conductive inks were prepared with silver nanoparticles and silver nanowires as conductive components, byk-333 as surface additive and ethylene glycol as solvent respectively. The conductive lines were printed on the flexible transparent substrate by micropltter II micro nano deposition system. The effects of printing process, thermal sintering curing and packaging on the conductivity, weather resistance and interference of the two printing circuits were studied. The results show that the diameter of printer nozzle and the contact angle between ink and substrate are the key factors to determine the linewidth accuracy of conductive circuit. Thermal sintering treatment can improve the conductivity of silver nanoparticle flexible circuit. When sintered at 160 ℃ for 30 minutes, the resistivity decreases to 16.4 μ Ω. cm, keep the conductivity unchanged after being placed in the air for 90 days, and the resistivity increases by 12.4% after 1000 bends; With the increase of printing times, the conductivity of the silver nanowire printing circuit continues to increase. The unit resistance of the printing line obtained by printing 9 times is 88.9 Ω /cm. With the increase of sintering temperature and time, the conductivity of the circuit decreases. PDMS packaging can greatly improve the stability of the printing circuit. After being placed in the air for 90 days and bent for 1000 times, the conductivity remains unchanged, It shows that conductive ink based on silver nano materials and micro nano deposition system can achieve stable printing of high-performance and high-precision flexible circuits.
丁泽宇,罗书轩,吴雅茜,何瑞博,徐世杰,景鑫,张文彦.纳米银导电墨水的制备及其在高精度柔性电路打印中的应用研究[J].稀有金属材料与工程,2023,52(10):3530~3538.[Ding Zeyu, Lu Shuxuan, Wu Yaxi, He Ruibo, Ding Zeyu, Jing Xin, Zhang Wenyan. Preparation of nano-silver conductive ink and its application in high-precision flexible circuit printing[J]. Rare Metal Materials and Engineering,2023,52(10):3530~3538.]