Many functonalized graphene colloids with impressively high concentration and stability have been prepared. The adopted methods possess many attracting characteristics. First, a series of cheap and industrially available chemicals, including the fluorescent whitening agents and dyes, have been demonstrated to be highly effective in suspending graphene individually at relatively high concentration. Second, naturally occurring tannins have been verified to be effective reducing agents for graphene oxide and the resulted graphene could be stably suspended by the tannins simultaneously. Third, the organophilicity of the tannin functionalized graphene could be effectively enhanced by a variety of derivatizations including nucleophilic addition of thiols and Manich condensation with polyetheramines. In addition, the fluid-like graphene with excellent solubility were also prepared with graphene as the core. The polymer/graphene composites, with exceptional combination of different kinds of properties, have been prepared by specific processing methods and interfacial design. Through introducing sacrificial interfacial bonds between the parallel-dispersed graphene and the matrix, the combination of high strength and toughness in the chitosan/graphene composites has been discolosed. Through in situ interfacial tailoring, the SBR/graphene composites with ionically bonded interfaces have been prepared and these composites possessed the combination of high strength and low gas permeability. By grafting of polymer end groups onto graphene surface, the polyester/graphene composites with exceptional combination of high electrical conductivity and thermal conductivity are demonstrated. 

Many functonalized graphene colloids with impressively high concentration and stability have been prepared. The adopted methods possess many attracting characteristics. First, a series of cheap and industrially available chemicals, including the fluorescent whitening agents and dyes, have been demonstrated to be highly effective in suspending graphene individually at relatively high concentration. Second, naturally occurring tannins have been verified to be effective reducing agents for graphene oxide and the resulted graphene could be stably suspended by the tannins simultaneously. Third, the organophilicity of the tannin functionalized graphene could be effectively enhanced by a variety of derivatizations including nucleophilic addition of thiols and Manich condensation with polyetheramines. In addition, the fluid-like graphene with excellent solubility were also prepared with graphene as the core. The polymer/graphene composites, with exceptional combination of different kinds of properties, have been prepared by specific processing methods and interfacial design. Through introducing sacrificial interfacial bonds between the parallel-dispersed graphene and the matrix, the combination of high strength and toughness in the chitosan/graphene composites has been discolosed. Through in situ interfacial tailoring, the SBR/graphene composites with ionically bonded interfaces have been prepared and these composites possessed the combination of high strength and low gas permeability. By grafting of polymer end groups onto graphene surface, the polyester/graphene composites with exceptional combination of high electrical conductivity and thermal conductivity are demonstrated.