Graphene oxide is the oxide of graphene, generally denoted by GO, the color is brownish-yellow, firstly prepared by the improved Hummers method to get the slurry, and then freeze-dried to get the high-quality graphene oxide powder. GO not only contains SP2 hybridized carbon atoms, part of the carbon-carbon double bond is interrupted by the ox- ygen-containing functional groups, which becomes the SP3 hybridization; the surface of graphene oxide contains a large number of functional groups, such as -OH,-COOH,-O-, etc. These functional groups give graphene oxide some new properties, such as good dispersion, hydrophilicity, increased interaction with polymers and so on.
Technical Advantages
- Using vacuum freeze-drying,higher yield than spray-drying,and the form remains intact; Good re-dispersibility, about 30min ultrasonic processing can be restored to the original sol form, to get a stable dispersion;
- Graphene oxide-based materials provide surface modification active sites and large specif- ic surface area;
- Good dispersion in composite materials, in situ polymerization to prepare multifunctional composite materials, less agglomeration;
- High purity, less metal impurities;
- Oxidation degree is adjustable and can be customized according to customer's demand.
