A series of water-based conductive carbon pastes were prepared by wet ball milling, followed by vacuum defoaming using isopropyl alcohol, propylene glycol or glycerin as co-solvents. Screen printing was then used to prepare conductive patterns. To determine the influence of co-solvent hydroxyl group number on the properties of water-based conductive carbon pastes, the rheological properties of the pastes and the surface morphologies and conductivities of the printed patterns were characterized. The results show that paste viscosity increased with the number of hydroxyl groups and the latter also affected thixotropy. In addition, the boiling points and surface tensions of the co-solvents increased consistently with hydroxyl group number, affecting the hydrodynamic flow. The conductive carbon paste created using propylene glycol as a co-solvent was the best for screen printing because of its weak coffee-ring effect and appropriate rheological properties, resulting in a smooth coating surface and uniform deposition of the fillers. The resistivity of the pattern printed using paste PG, containing the closest packing of conductive carbon black particles, was 0.44 Ω cm.

通过湿球磨制备一系列水基导电碳浆，然后使用异丙醇，丙二醇或甘油作为助溶剂进行真空消泡。然后使用丝网印刷来制备导电图案。为了确定助溶剂羟基数对水基导电碳浆料性能的影响，对浆料的流变性能以及印刷图案的表面形貌和电导率进行了表征。结果表明，糊状粘度随羟基数的增加而增加，后者也影响触变性。另外，助溶剂的沸点和表面张力随着羟基数的增加而一致地增加，从而影响了流体动力流动。使用丙二醇作为助溶剂制成的导电碳糊剂最适合丝网印刷，因为它具有弱的咖啡环效应和适当的流变性能，可形成光滑的涂层表面和均匀的填料沉积。使用包含最接近的导电炭黑颗粒堆积的糊料PG印刷的图案的电阻率为0.44Ωcm。