| Since the successful discovery of grapheme, it has taken a great focus on the chemistry, materials science and physics research. Because graphene has special structure and excellent performance, it has broad application in mechanical, electrical, thermal, optical fields The general method to oxidize graphite oxide is Hummers method. Graphite oxide and then exfoliated into graphene oxide. However, the use of strong oxidizing system Hummers method, oxidation of the graphite layers to take into oxygen-containing functional groups will destroy the carbon conjugated structure and affect conductivity. Therefore, this paper aimed at the reduction of graphene oxide, to removal oxygen-containing functional groups, to make sp3 hybrid structure of graphene oxide restored to sp2 hybridized graphite structure, thereby restoring the conjugate structure.Then the performance of graphene and rubber composites will be improved, expecially the antistatic performance.This thesis consists of two parts, The first part is to explore a good electrical conductivity and can be well-dispersed in a solvent of ethylenic derivatives grapheme. The main idea is to use the terminal amino group of octadecylamine (ODA) reactive with epoxy group, carboxyl group of graphite oxide by nucleophilic ring opening reaction and amide reaction. The ODA covalently grafted onto the surface of the graphite oxide to obtain functionalized graphite oxide (AGO), and then with a reducing agent to reduce the functionalized graphene oxide, the most of oxygen-containing functional groups of AGO was remove to obtain a ODA functionalized graphene (ARG) with non-presentation polarity, excellent conductivity. Firstly we rearch the reducing effctiveness of different reductant ascorbic acid, sodium citrate, sodium borohydride and discovery the reduction graphene (NB-rGO) which reduced by sodium borohydride with the most excellent conductivity. So We determine the selection of the sodium borohydride to be the reducing agent and explore the amount of ODA to reactive with ARG. Finaly we found when the ratio of ODA/GO is 0.75, the ARG has excellent conductivity and can be well dispersed in tetrahydrofuran(THF).The second part of the work is to blend functional graphene (ARG) with rubber materials to obtain an antistatic nanocomposite rubber materials. The main research idea is take the ARG and rubber to blend in a solvent THF to obtain the functionalized reducing graphene/rubber nanocomposite. We choose SSBR and NR as the basic rubber to obtain the SARG composite materials and the NARG composite materials. By using the XRD, scanning electron microscopy (SEM), physical and mechanical properties test, high resistance meter, dielectric properties testing to survey the structure and properties of composites. It shows that the resistivity of SARG12 reaches to 2.21×106Ω·m, with the best antistatic properties, and the SARG12 also has the largest tensile strength, elongation at break and 100% modulus,respectively are 15.5MPa,204% and 4.8MPa. Moreover 12phr fillers of the composite NAR.G12 has the lowest resistivity which is 8.7 x 104Q·m, with the best antistatic properties.The tensile strength of NARG5 has the largest 36.5MPa.From the experimental results, it shows that the graphene not only can play the role as nano-fillers to reinforced rubbers but also can form the conductive network in the rubber matrix, so the rubber can exhibit excellent conductive performance. |
