Preparation of functional bamboo by combining nano-copper with hemicellulose and lignin under high voltage electric field (HVEF)

Zehui Ju; Tianyi Zhan; Haiyang Zhang; Qian He; Man Yuan; Xiaoning Lu

doi:10.1016/j.carbpol.2020.116936

Preparation of functional bamboo by combining nano-copper with hemicellulose and lignin under high voltage electric field (HVEF)

Carbohydr Polym. 2020 Dec 15:250:116936. doi: 10.1016/j.carbpol.2020.116936. Epub 2020 Aug 27.

Authors

Zehui Ju¹, Tianyi Zhan², Haiyang Zhang¹, Qian He³, Man Yuan¹, Xiaoning Lu⁴

Affiliations

¹ College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, PR China.
² College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, PR China. Electronic address: tyzhan@njfu.edu.cn.
³ College of Civil Science and Engineering, Yangzhou University, 225000, PR China.
⁴ College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, PR China. Electronic address: luxiaoning-nfu@126.com.

PMID: 33049848
DOI: 10.1016/j.carbpol.2020.116936

Abstract

A simple and effective method for preparing functional bamboo by combining nano-copper with hemicellulose and lignin was proposed. The influences of HVEF treatment time and voltage on the reaction of nano-copper with hemicellulose and lignin were studied. The combination was characterized by scanning electron microscopy-X-ray energy dispersive spectrometer (ESEM-EDS), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The results indicated that the O/C ratio and OH content of the treated bamboo decreased, the number of CHO groups decreased, the number of CO groups increased, and the nano-copper interacted with the hemicellulose and lignin in the bamboo. Copper was presented in the treated bamboo in the form of Cu⁰, Cu⁺ and Cu²⁺. The concentration of copper increased with the increasing treatment time or voltage. The bamboo underwent the high-voltage electrostatic in situ impregnation copper treatment had significant antibacterial properties and excellent UV protection performance. Therefore, the in situ impregnation of nano-copper particles with an HVEF treatment is simple and effective to produce functionalized bamboo, and has broad application prospects.

Keywords: Bamboo; Functional; Hemicellulose; High voltage electric field; Lignin; Nano-copper particles.