摘要
以马来酸酐和甘油为改性剂处理速生杨木,探究马来酸酐质量分数、预处理温度和时间、酯化温度和时间对改性材尺寸稳定性的影响。结果表明,马来酸酐质量分数100%、预处理温度90℃、预处理时间4h、酯化温度100℃、酯化时间4 h时,改性材的抗体积膨胀率最大;红外光谱分析和扫描电镜观察结果表明,马来酸酐与木材和甘油中的羟基发生了酯化反应,形成酯化物,填充细胞壁孔隙,降低孔隙率,故提高了木材尺寸稳定性。
In this study, maleic anhydride （MA） and glycerin were used as modifiers for treating poplar wood. The effects of maleic anhydride content, reaction temperature and time, as well as esterification temperature and time on the stability of the treated wood were investigated.The results showed that anti-volume swelling efficiency （ASE） of the wood samples reached 91.02% by optimum treatment processes such as 100% maleic anhydride content, below 90℃ reaction temperature for 4 hours and 100℃ of esterification temperature for 4 hours. Esterification between maleic anhydride with hydroxyl groups in both wood and glycerin was verified by FT-IR analysis and SEM observation. Therefore, it was concluded that the maleic anhydride and glycerol reacted with each other in the cell cavity and formed an esterified substance, resulting in reduced porosity and better dimensional stability of the wood samples.
出处
《木材工业》
北大核心
2018年第1期1-5,共5页
China Wood Industry
基金
国家重点研发计划“人工林木材材质改良的化学基础研究”(2017YFD0600203).
关键词
马来酸酐
甘油
杨木
酯化反应
尺寸稳定性
maleic anhydride
glycerin
poplar wood
esterification reaction
dimensional stability
