In-Situ Chemosynthesis of ZnO Nanoparticles to Endow Wood with Antibacterial and UV-Resistance Properties

Abstract

Abstract:

Hybrid wood materials have attracted considerable attention because they have combined advantages of both wood and inorganic compounds. This work investigated the microstructural morphology, thermal stability, ultraviolet (UV) stability, and antibacterial property of composites made from wood/ZnO hybrid materials through a facile in-situ chemosynthesis methods. The X-ray diffraction (XRD) and thermogravimetric analysis (TGA) results indicated that the synthesized ZnO particles had an average grain size of about 10.8?nm. The scanning electron microscopy (SEM) observations showed that ZnO nanoflowers self-assembled with nanosheets were presented in wood cell lumens and increased with increasing Zn²⁺ concentrations. ZnO nanoparticles were also generated in the wood cell wall, which was confirmed by the results of energy-dispersive spectroscopy (EDS). The TGA tests also indicated that the thermal stability of wood/ZnO hybrid materials was improved after the formation of ZnO inorganic particles. Finally, the results of antibacterial efficacy tests and UV resistance tests revealed that ZnO nanoparticles showed a promising future as antimicrobial agents against Escherichia coli (E. coli) and UV resistance agents for wood protection.

Key words: Hybrid wood material, Nanoflowers, Zinc oxide, Antibacterial property, UV-resistance

Dong Youming,Yan Yutao,Ma Huandi,Zhang Shifeng,Li Jianzhang,Xia Changlei,Q. Shi Sheldon,Cai Liping. In-Situ Chemosynthesis of ZnO Nanoparticles to Endow Wood with Antibacterial and UV-Resistance Properties[J]. J. Mater. Sci. Technol., 2017, 33(3): 266-270.

Figures/Tables 5

Fig.1. XRD patterns of untreated wood and wood/ZnO hybrid materials.

Fig. 2. SEM observations of untreated and treated wood samples: cross-section of wood treated with 0.2?mol/L Zn2+ solution (a), 0.6?mol/L Zn2+ solution (b), and 1.0?mol/L Zn2+ solution (c); longitudinal section wood treated with 0.2?mol/L Zn2+ solution (d), 0.6?mol/L Zn2+ solution (e), and 1.0?mol/L Zn2+ solution (f); cross-section of untreated wood (g); high-magnification image of aggregation of ZnO (h); zinc distribution obtained by SEM-EDS (i).

Fig. 3. TG and dTG curves of untreated wood and wood/ZnO hybrid materials

Fig.4. Images of agar plates and the inhibition zone for E. coli

Fig.5. Color changes of wood samples treated with different concentrations of Zn2+

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