石墨烯/离子液体复合薄膜与离子交换

Graphene/Ionic liquid composite films and ion exchange.

作者信息

Mo Yufei, Wan Yunfang, Chau Alicia, Huang Fuchuan

机构信息

1] Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, P. R. China [2] School of Engineering & Applied Science, The George Washington University, Washington DC, 20052, United States.

School of Engineering & Applied Science, The George Washington University, Washington DC, 20052, United States.

出版信息

Sci Rep. 2014 Jun 27;4:5466. doi: 10.1038/srep05466.

DOI:10.1038/srep05466

PMID:24970602

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4073168/

Abstract

Wettability of graphene is adjusted by the formation of various ionic surfaces combining ionic liquid (IL) self-assembly with ion exchange. The functionalized ILs were designed and synthesized with the goal of obtaining adjustable wettability. The wettability of the graphene surface bearing various anions was measured systematically. The effect of solvent systems on ion exchange ratios on the graphene surface has also been investigated. Meanwhile, the mechanical properties of the graphene/IL composite films were investigated on a nanometer scale. The elasticity and adhesion behavior of the thin film was determined with respected to the indentation deformation by colloid probe nanoindentation method. The results indicate that anions played an important role in determining graphene/IL composite film properties. In addition, surface wetting and mechanics can be quantitatively determined according to the counter-anions on the surface. This study might suggest an alternate way for quantity detection of surface ions by surface force.

摘要

通过将离子液体（IL）自组装与离子交换相结合形成各种离子表面，可调节石墨烯的润湿性。设计并合成了功能化离子液体，目的是获得可调节的润湿性。系统地测量了带有各种阴离子的石墨烯表面的润湿性。还研究了溶剂体系对石墨烯表面离子交换率的影响。同时，在纳米尺度上研究了石墨烯/离子液体复合薄膜的力学性能。采用胶体探针纳米压痕法，根据压痕变形确定了薄膜的弹性和粘附行为。结果表明，阴离子在决定石墨烯/离子液体复合薄膜性能方面起着重要作用。此外，可根据表面抗衡阴离子对表面润湿性和力学性能进行定量测定。该研究可能为通过表面力对表面离子进行定量检测提供一种替代方法。