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bce ›› 2017, Vol. 51 ›› Issue (1): 1-7.doi: 10.3969/j.issn.1673-5854.2017.01.001

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Preparation and Antibacterial Activity of Wood Fiber Modified with Chitosan-Ag Nanoparticles

FENG Xiaoyan, ZHENG Kun, CHEN Ying, WANG Chunpeng, CHU Fuxiang   

  1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
  • Received:2016-03-24 Online:2017-01-30 Published:2017-01-23

Abstract: Chitosan-Ag nanoparticles(CS-Ag NPs) were prepared by liquid phase reducing method and then modified on the wood fiber with γ-mercaptoproyl trimethoxysilane as coupling agent to obtain the antibacterial wood fiber. The morphology of CS-Ag NPs was analyzed by TEM. The morphology and chemical structure as well as the thermal stability of the modified wood fiber were characterized by FT-IR, SEM and TG. Moreover, the water absorbency of the wood fiber was explored. The results indicated that the modified wood fiber showed high thermal stability and low water absorbency. The antibacterial effects of the wood fiber against methicillin-resistant Staphylococcus aureus(MRSA), gram-positive bacteria Staphylococcus aureus, Bacillus cereus and gram-negative bacteria Escherichia coli were studied with AGAR plate counting method. It showed that the inhibitory rates of the modified wood fiber against the bacteria were all up to 99.0%. Furthermore, the antimicrobial properties of the wood fiber board treated with PVP-Ag NPs and CS-Ag NPs were investigated. It indicated that the wood fiber board treated with CS-Ag NPs did not find bacterial plaque at 8th day while the fibers treated with PVP-Ag NPs and untreated found the plaque at 5th day in hygrothermal environment. The results illustrated that the wood fiber board treated with CS-Ag NPs possessed greater antibacterial properties.

Key words: Ag nanoparticles, synergetic antimicrobial, wood fiber

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