为解决柔性电子印刷中传统碳系导电油墨导电性能差的问题,通过引用高导电的石墨烯,制备了基于石墨烯/炭黑/石墨三维导电网络结构的水性石墨烯基导电油墨。探讨了分散剂用量、颜基比和干燥处理工艺三个主要因素对导电油墨导电性能的影响。在此基础上,采用低成本的丝网印刷工艺制备了柔性电热纺织品以评估导电油墨的应用性能。结果表明,制备的导电油墨具有较高的导电性能,最低方阻为20Ω/□。以此制备的柔性电热纺织品具有快速的升温能力和优异的电热稳定性、耐疲劳性,在充电宝5V电压下90s左右可以由室温到达稳态温度(60±3)℃,且具有一定的机械柔韧性。所制备的高导电水性石墨烯基导电油墨在柔性可穿戴领域具有较好的实际应用价值。
To solve the problem of poor conductivity of traditional carbon-based conductive inks in flexible electronic printing,this paper prepared aqueous graphene-based conductive inks based on the three-dimensional conductive network structure of graphene/carbon black/graphite by introducing highly conductive graphene.The effects of three main factors,namely,the amount of dispersant,the ratio of pigment to base and the drying process,on the conductive properties of the conductive inks were investigated.Based on this,flexible electrothermal textiles were prepared using a low-cost screen printing process to evaluate the application performance of the conductive inks.The results showed that the prepared conductive inks had high conductivity with a minimum sheet resistance of 20Ω/sq.The flexible electrothermal textile prepared in this way exhibited rapid heating capability,excellent electrothermal stability and fatigue resistance,and could reach a steady-state temperature of 60±3℃ from room temperature at about 90s under a rechargeable 5V voltage,with a certain degree of mechanical flexibility.The prepared highly conductive aqueous graphene-based conductive ink had good practical application value in the field of flexible wearable.
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