木材科学与技术2024，Vol.38Issue(6)：1-7,7.DOI:10.12326/j.2096-9694.2024121
TEMPO氧化处理调控轻木细胞壁纳米结构
Regulating Balsa Wood Cell Wall Nanostructure via TEMPO Oxidation
摘要
Abstract
The lack of nanopores and low specific surface area of natural wood limit its functional applications in many fields.In this study,2,2,6,6-tetramethylpiperidinyl-1-oxyl radical(TEMPO)-mediated oxidation was applied to generate nanopores in wood and increase its specific surface area by in-situ fibrillation of cellulose microfibril bundles within the cell walls of balsa wood(Ochroma pyramidale).The microstructure and chemical composition of the TEMPO-oxidized wood were characterized using scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR),and energy dispersive spectroscopy(EDS).Moreover,the effect of TEMPO-oxidation treatment on the pore structure of wood cell wall was investigated using a specific surface area and pore size analyzer.The results showed that the honeycomb-like cellular structure of the wood was well preserved after oxidation treatment,while the microfibrils in the wood cell wall were successfully individualized,resulting in a highly nanofibrillated network structure with microfibril diameters ranging from 20 to 40 nm.The TEMPO-oxidized wood exhibited a highly mesoporous structure with a high specific surface area of 96.92 m2/g,which is about 72 times higher than that of natural wood.This study provides a novel approach to regulating the nanostructure of wood cell walls for developing porous wood-based materials.关键词
轻木/细胞壁纳米结构/细胞壁孔隙/TEMPO氧化/纤维素微纤丝Key words
balsa wood/cell wall nanostructure/pore structure/TEMPO oxidation/cellulose microfibrils分类
农业科技引用本文复制引用
吴明月,戴鑫建,王鑫,王小青..TEMPO氧化处理调控轻木细胞壁纳米结构[J].木材科学与技术,2024,38(6):1-7,7.基金项目
"十四五"国家重点研发计划课题"木竹材细胞壁多层级结构与构效调控机制"(2023YFD2200501). （2023YFD2200501）
