氧化锌颗粒沉积和热处理对杨木尺寸稳定性和力学性能的综合影响。

Combined effects of ZnO particle deposition and heat treatment on dimensional stability and mechanical properties of poplar wood.

机构信息

Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin, 150040, P.R. China.

Mechanical and Energy Engineering Department, University of North Texas, Denton, Texas, 76201, USA.

出版信息

Sci Rep. 2017 Aug 30;7(1):9961. doi: 10.1038/s41598-017-10606-5.

DOI:10.1038/s41598-017-10606-5

PMID:28855668

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5577223/

Abstract

This study proposed a one-step wood modification method by combining the deposition of ZnO particles on wood surface and heat treatment. The effects of ZnO particles and heat treatment on mechanical properties and dimensional stability of poplar wood were examined. Samples were sorted into 4 groups, i.e., control, heat-treated, impregnation/heat-treated, and hydrothermal-treated samples. The mechanical properties and dimensional stability of impregnation/heat-treated and hydrothermal-treated wood samples were measured in comparison with those of the control and heat-treated wood samples. Compared with the control ones, the reduction of the flexural strength of the heat-treated, impregnation/heat-treated and hydrothermal-treated samples were about 11.57%, 8.53% and 15.90%, respectively. The modulus of elasticity of the heat-treated and hydrothermal-treated samples decreased by 13.78% and 23.78%, respectively, while the impregnation/heat-treated samples increased by about 8.57% due to the ZnO particles growth. The dimensional stabilities of the heat-treated, impregnated/heat-treated and hydrothermal-treated samples were improved in comparison with that of the control sample. All samples were characterized by the scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X - ray diffraction (XRD).

摘要

本研究提出了一种一步法木材改性方法，即将 ZnO 颗粒沉积在木材表面并进行热处理。考察了 ZnO 颗粒和热处理对杨木力学性能和尺寸稳定性的影响。将样品分为 4 组，即对照组、热处理组、浸渍/热处理组和水热处理组。比较了浸渍/热处理和水热处理木材样品与对照组和热处理木材样品的力学性能和尺寸稳定性。与对照组相比，热处理、浸渍/热处理和水热处理样品的抗弯强度分别降低了 11.57%、8.53%和 15.90%。热处理和水热处理样品的弹性模量分别降低了 13.78%和 23.78%，而由于 ZnO 颗粒的生长，浸渍/热处理样品的弹性模量增加了约 8.57%。与对照组相比，热处理、浸渍/热处理和水热处理样品的尺寸稳定性得到了提高。所有样品均采用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和 X 射线衍射（XRD）进行了表征。