Separation of graphene oxides of different sizes by multi-layer dialysis and anti-friction and lubrication performance

IF 3.8 4区工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Green Processing and Synthesis Pub Date : 2023-01-01 DOI:10.1515/gps-2023-0114

Chunna Cui, Yuemei Sun, Jitao Huang

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Abstract

Abstract As a 2D carbon material, graphene exhibits a unique structure and outstanding properties and has been widely applied in various fields. Because the properties of graphene are closely related to their structural parameters, graphene with different size distributions is suitable for different applications. However, current methods of fine-scale separation of graphene and its derivatives have certain limitations. In this study, graphene oxide (GO) size separation using multilayer dialysis was proposed. Multiple size separation in one step was achieved by customizing the dialysis size of each layer according to the actual requirements. In this way, GOs of different sizes were separated and large-scale synthesis can be achieved using this method. Meanwhile, the anti-friction and lubrication properties of aqueous dispersion solutions of GOs of different sizes were investigated. The results indicated significant improvements of the anti-friction and lubrication properties of GO samples prepared by the proposed method, as large-scale GOs can act as lubricants by relieving, if not preventing, friction between the two friction surfaces.

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通过多层透析分离不同尺寸的氧化石墨烯及其抗摩擦润滑性能

石墨烯作为一种二维碳材料，具有独特的结构和优异的性能，在各个领域得到了广泛的应用。由于石墨烯的性能与其结构参数密切相关，不同尺寸分布的石墨烯适用于不同的应用。然而，目前石墨烯及其衍生物的精细分离方法存在一定的局限性。在这项研究中，提出了使用多层透析分离氧化石墨烯(GO)的尺寸。通过根据实际需要定制每层透析粒度，实现一步多粒度分离。通过这种方法可以分离不同粒径的氧化石墨烯，实现大规模合成。同时，研究了不同粒径的氧化石墨烯水分散溶液的抗摩擦和润滑性能。结果表明，通过该方法制备的氧化石墨烯样品的抗摩擦和润滑性能显著提高，因为大规模的氧化石墨烯可以通过缓解(如果不是阻止)两个摩擦表面之间的摩擦来起到润滑剂的作用。

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来源期刊

Green Processing and Synthesis CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL

CiteScore

6.70

自引率

9.30%

发文量

审稿时长

7 weeks

期刊介绍： Green Processing and Synthesis is a bimonthly, peer-reviewed journal that provides up-to-date research both on fundamental as well as applied aspects of innovative green process development and chemical synthesis, giving an appropriate share to industrial views. The contributions are cutting edge, high-impact, authoritative, and provide both pros and cons of potential technologies. Green Processing and Synthesis provides a platform for scientists and engineers, especially chemists and chemical engineers, but is also open for interdisciplinary research from other areas such as physics, materials science, or catalysis.