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Properties of graphene inks stabilized by different functional groups

机译：不同官能团稳定的石墨烯油墨的性能

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Different graphene inks have been synthesized by chemical methods. These uniform dispersions were stabilized by various functional groups such as room temperature ionic liquid, polyaniline, polyelectrolyte (poly[2,5-bis(3- sulfonatopropoxy)-1,4-ethynylphenylene-alt-1,4-ethynylphenylene] sodium salt) and poly(styrenesulfonate) (PSS). The dispersions can be easily cast into high-quality, free-standing films but with very different physiochemical properties such as surface tension and adhesion. SEM and AFM methods have been applied to have a detailed study of the properties of the inks. It is found that graphenes modified by p-type polyaniline show the highest surface tension. Diverse surface adhesive properties to the substrate are also found with various functional groups. The different viscoelasticities of graphene inks were related to the microscopic structure of their coating layer and subsequently related to the configuration, chemistry and molecular dimensions of the modifying molecules to establish the property-structure relationship. Modifications of graphene inks made from chemical reduction cannot only enable cost-effective processing for printable electronics but also extend the applications into, for example, self-assembly of graphene via bottom-up nano-architecture and surface energy engineering of the graphenes. To fabricate useful devices, understanding the surface properties of graphene inks is very important. It is the first paper of this kind to study the surface tension and adhesion of graphene influenced by different functional groups.
机译：已经通过化学方法合成了不同的石墨烯油墨。这些均一的分散体可通过各种官能团（例如室温离子液体，聚苯胺，聚电解质）稳定化（聚[2,5-双（3-磺酰基丙氧基）-1,4-乙炔基亚苯基-alt-1,4-乙炔基亚苯基]钠盐）和聚（苯乙烯磺酸盐）（PSS）。分散体可以很容易地铸成高质量的自支撑薄膜，但具有非常不同的理化特性，例如表面张力和附着力。已应用SEM和AFM方法对油墨的性能进行了详细研究。发现由p型聚苯胺改性的石墨烯显示出最高的表面张力。还发现具有各种官能团的对基材的不同表面粘合性能。石墨烯油墨的不同粘弹性与其涂层的微观结构有关，随后与改性分子的构型，化学性质和分子尺寸有关，以建立性能-结构关系。由化学还原制成的石墨烯油墨的改性不仅可以实现可印刷电子产品的经济有效处理，而且可以将应用范围扩展到例如通过自下而上的纳米结构和石墨烯的表面能工程技术自组装石墨烯。为了制造有用的设备，了解石墨烯墨水的表面特性非常重要。研究受不同官能团影响的石墨烯的表面张力和粘附力是此类论文的第一篇。

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