Product Description:
Dispersible graphene is prepared through the complete reduction of graphene oxide, which is prepared by the modified Hummer’s method. It should be noted that the graphene prepared by the usual method is easy to form the graphene aggregation. It is very hard, even its volume is much smaller than its parent material graphite. The resulting graphene agglomerate is not soluble or redispersable in water or other polar solvents, making further processing difficult. Our product Dispersible graphene overcome the challenge, and it can be redispersed in many solvents, such as in water, alcohol, acetone, DMF etc. Fig.1 shows the difference between dispersible graphene and non-redispersible graphene.
Fig. 1. The difference between dispersible graphene and non-redispersible graphene. a) 100 mesh flake graphite; b) Graphene prepared by the normal method, It is very hard, and it can not be redispersed in the solvents; c) Dispersible graphene, loose, like ash
Fig. 2. The TEM photo of dispersible graphene
Fig. 3. The FT-IR spectra of graphene oxide (a) and dispersible graphene (b)
Fig. 4. The TG curve of graphene oxide (a) and dispersible graphene (b)
It should be noted that the product we supply is the single-layer (>80%) dispersible graphene, not graphene nanoplate. The thickness of graphene nanoplate is alway larger than 20 nm, therefore it always consists of more than 50 layer graphene, and it lose the intrinsic special properties of single-layer graphene.
1）由于石墨烯具有非常高的比表面积，导致其团聚非常严重，难以在
极性或非极性溶剂中分散。
我们目前完全解决好石墨烯的分散问题，为 其在复合材料中的应用扫清了障碍；
2）氧化石墨烯是对石墨烯改性的中间体，我们已得到羧基化的石墨烯，表面羧基含量在5.0 wt.%左右，大大利于其下一步的应用；
3）可批量供应氧化石墨烯膜（纸）和石墨膜（纸）；
4）可订制氧化石墨烯或石墨烯分散液（极性或非极性溶剂中均可）；
5）与美国名校合作，推出高端的改性石墨烯-氨基化的石墨烯和巯基化石墨烯。