Supramolecular structure of microwave treated bamboo for production of lignin-containing nanocellulose by oxalic acid dihydrate

Youmei Wang; Huijuan Shao; Hui Pan; Yongze Jiang; Jinqiu Qi; Qi Chen; Shaobo Zhang; Hui Xiao; Yuzhu Chen; Shanshan Jia; Xingyan Huang; Lihua Tu; Zhiping Su; Jiulong Xie

doi:10.1016/j.ijbiomac.2023.123251

Supramolecular structure of microwave treated bamboo for production of lignin-containing nanocellulose by oxalic acid dihydrate

Int J Biol Macromol. 2023 Mar 1:230:123251. doi: 10.1016/j.ijbiomac.2023.123251. Epub 2023 Jan 10.

Authors

Youmei Wang¹, Huijuan Shao¹, Hui Pan², Yongze Jiang¹, Jinqiu Qi¹, Qi Chen¹, Shaobo Zhang¹, Hui Xiao¹, Yuzhu Chen¹, Shanshan Jia¹, Xingyan Huang¹, Lihua Tu¹, Zhiping Su¹, Jiulong Xie³

Affiliations

¹ College of Forestry, Sichuan Agricultural University, Chengdu 611130, China; Wood Industry and Furniture Engineering Key Laboratory of Sichuan Provincial Department of Education, Chengdu 611130, China.
² College of Chemical Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China.
³ College of Forestry, Sichuan Agricultural University, Chengdu 611130, China; Wood Industry and Furniture Engineering Key Laboratory of Sichuan Provincial Department of Education, Chengdu 611130, China. Electronic address: jxie6@sicau.edu.cn.

PMID: 36639071
DOI: 10.1016/j.ijbiomac.2023.123251

Abstract

Supramolecular structure of cellulosic materials from microwave treatment were throughly investigated for production of lignin-containing nanocellulose. The results revealed that both the intermolecular and intramolecular hydrogen bonds were altered by microwave irradiation. Cellulose I_β was the main component in microwave treated bamboo (MTB) with smaller interplanar spacing, and the cellulose molecules were loosely connected resulting in a loose structure. Thereafter, MTB was used to produce lignin-containing nanocellulose by using oxalic acid dihydrate (OAD) to test the feasibility on its efficiency. The chemical consumed for the preparation of lignin-containing nanocellulose (LCN) with a comparable yield (68.08-82.33 %) from MTB was merely 1/10 that from conventional cellulosic materials, indicating the supramolecular structural changes of bamboo cellulose induced by microwave treatment provided suitable conditions for the subsequent hydrolysis of OAD to prepare LCN. The LCN was further added into the polyvinyl alcohol (PVA) matrix endowed excellent UV shielding property and thermal stability for the PVA/LCN films. This study was aimed to provide an environmentally friendly method on the production and application of LCN from bamboo by employing microwave treatment from the perspective of supramolecular level.

Keywords: Bamboo; Lignin-containing nanocellulose; Microwave treatment; Oxalic acid dihydrate.

MeSH terms

Cellulose / chemistry
Hydrolysis
Lignin* / chemistry
Microwaves*
Oxalic Acid
Polyvinyl Alcohol / chemistry

Substances

Lignin
Cellulose
Oxalic Acid
Polyvinyl Alcohol