| 摘要 |
The invention discloses a preparation method of modified graphene, which comprises the following steps that: (1) graphite and materials with polar functional groups are uniformly mixed according to a mass ratio of 1:(0.1-50) at subzero 10 DEG C to 200 DEG C, and react at a certain temperature and within a certain time for one step or more steps, object polar functional groups are grafted onto graphitic sheet layers, the object polar functional groups comprise all the polar functional groups contained in the materials with the polar functional groups and/or polar functional groups generated by the reaction between the materials with the polar functional groups with the graphite; (2) the unreacted raw materials in Step (1) and/or impurities produced in the reaction are removed, and the graphite powder grafted with the object polar functional groups is obtained through drying and crushing; and (3) the graphite powder produced in Step (2) is heated and cleaved in protective gas, then the modified graphene grafted with the object polar functional groups on the sheet layers is obtained, and the mass percent of the goal polar functional groups in the modified graphene is 0.01-50%. |
