High-Concentration Self-Cross-Linkable Graphene Dispersion,Chemistry of Materials

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High-Concentration Self-Cross-Linkable Graphene Dispersion
Chemistry of Materials ( IF 7.2 ) Pub Date : 2018-07-05 00:00:00 , DOI: 10.1021/acs.chemmater.8b00884
Junshuo Cui ₁ , Shuxue Zhou ₁

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The formation of a homogeneous graphene dispersion is a fundamental prerequisite for the preparation of high-performance graphene-based materials, yet it remains a challenge to obtain, particularly at high concentrations, meanwhile possessing a film-forming ability. In the present work, a new TSiPD^•+ molecule, consisting of a conjugated core and terminal silanol groups, was synthesized. With the aid of the TSiPD^•+, a stable graphene dispersion in water was obtained with a concentration up to 10 mg/mL. More interestingly, the graphene dispersion was able to self-cross-link, after direct casting on substrates, forming highly conductive graphene films with good mechanical strength and excellent solvent resistance. The outstanding performance of the graphene films is owed to the condensation of the silanol groups in the TSiPD^•+ molecules. The use of the aqueous graphene as conductive ink for paper, glass, and even polymer films was demonstrated.

中文翻译：

高浓度自交联石墨烯分散体

均匀的石墨烯分散体的形成是制备高性能石墨烯基材料的基本先决条件，但是，要获得尤其是在高浓度下同时具有成膜能力仍然是一个挑战。在本工作中，合成了一个新的TSiPD ^•+分子，该分子由共轭核心和末端硅烷醇基组成。借助TSiPD ^•+，可获得浓度高达10 mg / mL的稳定的石墨烯在水中的分散体。更有趣的是，石墨烯分散体在直接流延在基材上之后能够自交联，形成具有良好机械强度和优异耐溶剂性的高导电性石墨烯薄膜。石墨烯薄膜的出色性能归因于TSiPD ^•+分子中硅烷醇基团的缩合。演示了将水性石墨烯用作纸张，玻璃甚至聚合物薄膜的导电油墨。

更新日期：2018-07-05

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