Abstract
In this study, a simple and effective method for preparing bamboo with high fungal resistance was first proposed. Flattened moso bamboo (Phyllostachys pubescens), which is a perishable species, was connected to a silver plate and exposed to a high-voltage electrostatic field (HEVF). The method was based on HEVF excitation of a silver plate to produce silver ions and facilitate in situ impregnation of bamboo. Silver ions were present in the forms of Ag(0), Ag(I) and Ag(III) and reacted with bamboo functional groups under HVEF treatment. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy analysis showed that compared to those of untreated bamboo, the O/C ratio and OH content of treated bamboo were lower, the number of CHO groups decreased, the number of CO groups increased, and silver interacted with the hemicellulose and lignin of bamboo. The concentration of silver ions increased with increasing treatment time and voltage. The silver ions were nanocrystalline, and the average particle size was 50 nm. The mass loss and moisture content of the treated bamboo decreased significantly after exposure to decay fungi. Therefore, in situ impregnation of silver with HVEF was a simple and effective method to improve the durability of bamboo materials.
Funding source: Doctorate Fellowship Foundation of Nanjing Forestry University
Funding source: Postgraduate Research & Practice Innovation Program of Jiangsu Province
Award Identifier / Grant number: KYCX18_0962
Funding source: the National Key R&D Program of China
Award Identifier / Grant number: 2017YFC0703501
Funding source: National Natural and Science Foundation
Award Identifier / Grant number: BK20170926
Funding source: National First-class Disciplines
Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: The authors gratefully acknowledge funding support from the National Key R&D Program of China (2017YFC0703501), the National Natural and Science Foundation (no. BK20170926), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX18_0962), the Doctorate Fellowship Foundation of Nanjing Forestry University, a project funded by the National First-class Disciplines (PNFD) and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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