At the moment, GOgraphene sells graphene oxide as both aqueous dispersions and freeze dried powders. The powders were added to the product range to allow researchers to use GOgraphene's graphene oxide in non-aqueous systems (watch a video of our Graphene Oxide dispersions dispersing in water). “Non-aqueous” clearly covers a large number of media and the GOgraphene team wanted to learn more about which solvents their graphene oxide powder would disperse in.
From experience the GOgraphene team know how easily their graphene oxide powder disperses in water and based on available literature they knew that graphene oxide should disperse well in many polar solvents. To find out if GOgraphene's graphene oxide powder disperses as well in other polar solvents as it does in water, the team decided to put it to the test.
Using water, dimethylformamide (DMF), isopropyl alcohol (IPA) and ethylene glycol, 0.05 mg/mL graphene oxide dispersions were prepared using GOgraphene's freeze dried graphene oxide powder. The dispersions were left in an ultrasonic bath for 3 hours at ambient temperature and the results are shown in the picture above. The freeze dried powder dispersed well in all 4 solvents - another success for the GOgraphene team!