In the development of the flexible electronics industry, creating high stability and environmentally friendly conductive inks has remained a key challenge. In this study, less-toxic solvent exchange techniques graphene conductive inks were printed on polyethylene terephthalate substrate. This study aimed to investigate the properties of graphene conductive ink prepared by solvent exchange techniques using four combinations of solvents. To this end, four combinations of solvents were used to fabricate the graphene conductive inks, namely, dimethylformamide (DMF): xylene, DMF: toluene, DMF: ethanol, and DMF: acetone. Conductive ink fabricated by DMF: ethanol solvent exchange was produced with a higher degree of stability and wettability, as well as a 5% enhancement of electrical conductivity, in comparison with other solvent exchange solutions. The findings showed that the electrical conductivity of conductive film increased with an increase of 45% printing cycles. Furthermore, it has been observed that the electrical conductivity of printed graphene film decreased at only 0.02% even over 10 times of bending cycles. Therefore, the combination of DMF: ethanol solvent exchange is the most suitable formulation for graphene conductive inks.

在柔性电子工业的发展中，创造高稳定性和环境友好的导电油墨仍然是关键的挑战。在这项研究中，毒性较小的溶剂交换技术是将石墨烯导电油墨印刷在聚对苯二甲酸乙二醇酯基底上。这项研究旨在研究通过使用四种溶剂组合的溶剂交换技术制备的石墨烯导电油墨的性能。为此，使用了四种溶剂组合来制造石墨烯导电油墨，即二甲基甲酰胺（DMF）：二甲苯，DMF：甲苯，DMF：乙醇和DMF：丙酮。与其他溶剂交换解决方案相比，使用DMF：乙醇溶剂交换生产的导电油墨具有更高的稳定性和润湿性，并且导电率提高了5％。结果表明，导电膜的电导率随着印刷周期的增加而增加了45％。此外，已经观察到，即使经过十倍的弯曲循环，印刷的石墨烯膜的电导率也仅下降0.02％。因此，DMF：乙醇溶剂交换的组合是最适合石墨烯导电油墨的配方。