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ANTIBACTERIAL ACTIVITY OF WATER SOLUBLE ?-CYCLODEXTRIN MODIFIED GRAPHENE OXIDE MATERIALS

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Author: Lei Sang, Lin Tang, Wen-Tao Hao, Peng Cui

Abstract: Graphene oxide (GO) continues to be interesting material due to their large specific surface area properties. In order to inhibit the aggregation and improve the water solubility of GO, ``soft-cutting'' technology was used for preparation of ?-cyclodextrin modified graphene oxide materials (?-CD@GO). The formation of corrugations of ?-CD@GO was evaluated by transmission electron microscope (TEM) observation. The ?-CD@GO sheet exhibited appreciable water dispersion capacity than the pristine GO. According to further evidence from Raman spectroscopy, UV - vis, Fourier transform infrared spectra (FT-IR), X-ray diffraction (XRD), it can be deduced that some oxygen groups of GO were reduced by ?-CD which were chemically absorbed on the GO surface, promoting the peeling of graphene layer. The ?-CD@GO also exhibited thermal stability enhancement. Furthermore, the ?-CD modified GO showed excellent inhibition on the bacterial growth due to the good dispersity of ?-CD@GO. This approach is expected to provide a promising food preservation material in packaged food to counteract bacterial spoilage.

Keywords: Antibacterial, Graphene oxide, Modified ?-cyclodextrin, Water soluble

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