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ABSTRACT
In this paper, graphene oxide (GO) was prepared by modified Hammer's method using graphite, which was then modified with silane coupling agent (MGO). With two-roll mill mixing method, GO was used as filler and composites like nitrile-butadiene rubber (NBR)/GO(MGO) composites and nitrile-butadiene rubber (NBR)/2,2'-methylenebis(6-tert-butyl-4-methyl-phenol) (AO-2246)/GO(MGO) composites were prepared. Fourier Transform Infrared Spectrometer (FT-IR), Atomic Force Microscope (AFM) and Scanning Electron Microscope (SEM) were used to observe and study the molecular structure and morphology of GO, MGO and the composites. Dynamic Mechanical Analyzer (DMA) was used to study the damping properties of the composites. The composites reinforced by GO and MGO exhibited better damping and mechanical property. The damping property of NBR/GO composites weakens but the damping property of NBR/AO-2246/GO composites enhances with increase graphene oxide (GO). The damping property of the composites is enhanced by the addition of MGO. The main reason of the excellent properties of the graphene derivatives is its structural characteristics and the associated hydrogen bonds in the structure.
Keywords: Graphene oxide, Nutrile-butadiene rubber, Hindered phenol hybrid, Damping property.
1.INTRODUCTION
Damping material is a kind of widely used material, it is used to reduce noise or vibration, damping material is very valuable to engineering, especially in space, military or rail transit.
Graphene was successfully prepared by Meyer111, Novoselov12"31, et al in 2004. It is a kind of two-dimensional crystal tightly packed by carbon atoms which presents excellent electrical, thermal, magnetic and mechanical property. There were two main reasons for the agglomeration of graphene layers, the instability of two-dimensional shape and wrinkles on the surface of graphene 14"51. Comparing to graphene, graphene oxide also was a twodimensional layered structure, but there were a lot of oxygen functional groups on the surface16-71, which could form a strong interaction between the polymer and fillers and prevent the agglomeration effectively. Meanwhile, graphene oxide could greatly improve the properties of the composite [8"91. The fillers possess two-dimension structure might generated the friction between the fillers and the polymer1101. However, the mechanism behind the enhancement effect of the graphene oxide on the damping property of composites is still not clear. As one of the best damping materials, the hindered phenol hybrid damping material was a kind of material with high damping property and it was...