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利用核磁共振技术研究热处理中密度纤维板的吸水性
陶德亨,李新宇,刘文静,郎真
0
(内蒙古农业大学材料科学与艺术设计学院,呼和浩特 010018)
摘要:
基于时域核磁共振技术,对3个热处理温度(120、170和220℃)下MDF(中密度纤维板)的吸水性进行了研究,并利用X射线衍射技术,辅助揭示不同样品吸水性差异的机理。结果表明,170℃处理MDF吸水过程中吸水率、自由水和结合水含量最低;220℃热处理MDF的纤维素结晶区被破坏,原有的空隙结构被改变,吸水率、自由水和结合水含量最高。
关键词:  中密度纤维板  吸水  时域核磁共振  横向弛豫时间
DOI:10.13610/j.cnki.1672-352x.20180825.035
投稿时间:2018-01-21
基金项目:内蒙古自治区自然科学基金 (2016BS0306)资助。
Water adsorption of heat-treatment medium density fiberboard studied by TD-NMR technique
TAO Deheng,LI Xinyu,LIU Wenjing,LANG Zhen
(College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot 010018)
Abstract:
In this study, water absorption of MDF (medium density fiberboard) treated with high temperatures (120℃, 170℃ and 220℃) was studied using the time-domain nuclear magnetic resonance technique. The x-ray diffraction technique was used to reveal the effect mechanism of heat-treatment on the water absorption, and the results showed that the contents of free water and bound water of MDF treated at 170℃ were the lowest, which meant 170℃ was the ideal heat-temperature in this experiment. In addition, the crystal and pore structures of MDF treated at 220℃ were changed, and their contents of free water and bound water were the highest.
Key words:  MDF  water adsorption  TD-NMR  T2

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