Controlled Functionalization of Reduced Graphene Oxide Enabled by Microfluidic Reactors,Chemistry of Materials

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Controlled Functionalization of Reduced Graphene Oxide Enabled by Microfluidic Reactors
Chemistry of Materials ( IF 7.2 ) Pub Date : 2018-04-13 00:00:00 , DOI: 10.1021/acs.chemmater.7b04740
Simone Silvestrini ₁ , Christian C. De Filippo ₁ , Nicola Vicentini ₁ , Enzo Menna ₁ , Raffaello Mazzaro ₂ , Vittorio Morandi ₃ , Luca Ravotto ₂ , Paola Ceroni ₂ , Michele Maggini ₁

Affiliation

We report the use of microfluidics to functionalize suspended reduced graphene oxide flakes through the addition of aryl radical, generated in situ by reaction between aryl amines and isopentyl nitrite. Microfluidic enabled a tight control of temperature, reaction times, and stoichiometric ratios, making it possible to tune the growth of oligomers on the surface of the flakes, which in turn affects the interactions of the functional material with the surrounding environment. The results suggest that shear stress phenomena within the reactor may play a role in the chemistry of graphene materials by providing a constant driving force toward exfoliation of the layered structures. Scale-up of the functionalization process is also reported along with the grafting of dyes based on squaric acid cores. Photophysical characterization of the dye-modified flakes proves that the microfluidic approach is a viable method toward the development of new materials with tailored properties.

中文翻译：

微流控反应器实现的还原氧化石墨烯的受控功能化

我们报道了使用微流控技术通过原位生成的芳基自由基的作用来使悬浮的还原型氧化石墨烯薄片功能化通过芳基胺和亚硝酸异戊酯之间的反应。微流体技术可以严格控制温度，反应时间和化学计量比，从而可以调节薄片表面上低聚物的生长，进而影响功能材料与周围环境的相互作用。结果表明，通过向层状结构的剥离提供恒定的驱动力，反应器内的剪切应力现象可能在石墨烯材料的化学反应中起作用。还报道了功能化工艺的扩大规模以及基于方酸核心的染料接枝。染料改性薄片的光物理特征证明，微流体方法是开发具有定制性能的新材料的可行方法。

更新日期：2018-04-13

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