Yu Chengbing, Shi Kaiqin, Ning Jinyan, Liu Jun
School of Materials Science and Engineering, Shanghai University, Shanghai 201800, China.
Materials Genome Institute, Shanghai University, Shanghai 200444, China.
Polymers (Basel). 2021 Sep 16;13(18):3126. doi: 10.3390/polym13183126.
Fluorinated graphene (FGi) is easy to agglomerate, after which it turns into a curly and wavy shape, which results in a great decrease in the properties of the resultant composite materials and coatings. In this study, fluorinated graphene oxide (FGO) modified with p-phenylenediamine (PPD) was prepared, but with a view to avoid its agglomeration and retain a sheet-like structure. Through the reaction between PPD and the epoxy groups of FGO, the modified FGO with an amino group (N-PGO) had a larger interlayer d-spacing than FGO. The stability of N-PGO was also improved, and nitrogen, fluorine, oxygen, and carbon were evenly distributed in the N-PGO sheets. All the results indicate that PPD can act as an effective spacer to separate graphene sheets for good anti-agglomeration properties. This method produced modified graphene with fluorine, amino, and carbonyl groups. It shows potential in introducing N-PGO as a reactive modifier in composite materials and coatings for a variety of industrial applications including waterborne epoxy materials.
氟化石墨烯（FGi）易于团聚，之后会变成卷曲和波浪状，这导致所得复合材料和涂层的性能大幅下降。在本研究中，制备了用对苯二胺（PPD）改性的氟化氧化石墨烯（FGO），目的是避免其团聚并保留片状结构。通过PPD与FGO的环氧基团之间的反应，带有氨基的改性FGO（N-PGO）的层间d间距比FGO更大。N-PGO的稳定性也得到了提高，氮、氟、氧和碳在N-PGO片层中均匀分布。所有结果表明，PPD可以作为有效的间隔物来分离石墨烯片层，具有良好的抗团聚性能。该方法制备出了带有氟、氨基和羰基的改性石墨烯。它在将N-PGO作为反应性改性剂引入复合材料和涂层以用于包括水性环氧材料在内的各种工业应用方面显示出潜力。
