Conductive Screen Printing Inks by Gelation of Graphene Dispersions
Conductive Screen Printing Inks by Gelation of Graphene Dispersions
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DOI：
10.1002/adfm.201504030
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发表时间：
2016-01-26
影响因子：
19
通讯作者：
Friedrich, Heiner
中科院分区：
文献类型：
--
作者：
Arapov, Kirill;Rubingh, Eric;Friedrich, Heiner
本文描述了由温和加热引发的高度浓缩的石墨烯/聚合物分散体的凝胶化。凝胶形成仅取决于石墨烯的浓度，其中3.25mg mL（-1）作为石墨烯网络形成的最小值。然后，石墨烯凝胶用于制备胶体稳定且高度浓缩（52 mg mL（-1））的石墨烯糊剂，其在丝网印刷中表现出优异的性能，低至40 m宽的线。印刷图案干燥在100摄氏度只有5分钟表现出薄层电阻为30？(-1)因此，在25 μ m的厚度下，不需要长时间的高温退火、掺杂或其它处理。这种低干燥温度、高印刷清晰度以及与工业相关塑料和纸基材的兼容性使印刷柔性电子产品中的大容量卷对卷应用触手可及。
This paper describes the gelation of highly concentrated graphene/polymer dispersions triggered by mild heating. The gel formation is only dependent on the concentration of graphene with 3.25 mg mL(-1) as the minimum value for graphene network formation. The graphene gel is then utilized for the preparation of colloidally stable and highly concentrated (52 mg mL(-1)) graphene pastes that demonstrate excellent performance in screen printing down to lines of 40 m in width. Printed patterns dried at 100 degrees C for only 5 min exhibit sheet resistances of 30 ?(-1) at 25 m thickness, thus, removing the need for long-time high temperature annealing, doping, or other treatments. Such a low drying temperature, high printing definition, and compatibility with industrially relevant plastic and paper substrates brings high-volume roll-to-roll application in printed flexible electronics within reach.