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R Soc Open Sci. 2018 Aug 15;5(8):180173. doi: 10.1098/rsos.180173. eCollection 2018 Aug.

Improved mould resistance and antibacterial activity of bamboo coated with ZnO/graphene.

Author information

1
Zhejiang Provincial Key Laboratory of Biological and Chemical Utilization of Forest Resources, Zhejiang Academy of Forestry, Hangzhou 310023, People's Republic of China.
2
China National Bamboo Research Center, Chinese Academy of Forestry, Hangzhou 310012, People's Republic of China.
3
School of Engineering, Zhejiang Agricultural and Forestry University, Lin'an 311300, People's Republic of China.
4
Zhejiang Yongyu Bamboo Joint-Stock Co., Ltd, Anji 313301, People's Republic of China.

Abstract

Bamboo is susceptible to mould and attack by fungi because of its high content of starch and sugar. To make bamboo-based outdoor materials, a new type of bamboo timber with improved mould resistance and antibacterial activity, coated with reduced graphene oxide and nanocrystal ZnO (abbreviated as RGO@ZnOBT), was fabricated by a two-step dip-dry and hydrothermal process. A possible synthesis mechanism for RGO@ZnOBT was investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscope, energy-dispersal X-ray analysis, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy. According to the China standard test method, the Aspergillus niger mould resistance of RGO@ZnOBT is grade 2, whereas the Trichoderma viride and Penicillium citrinum mould resistance of RGO@ZnOBT is grade 0, both of which are better than the grade 4 of original bamboo timber. The Escherichia coli resistance test showed that the antibacterial circle of RGO@ZnOBT is 3 mm, which is significantly higher than that of original bamboo timber (0 mm). The antibacterial activity of treated bamboo is significantly improved compared with that of untreated bamboo.

KEYWORDS:

antibacterial activity; bamboo; graphene; mould resistance; zinc oxide

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