Статья

Effects of thermal modification on the physical, chemical and micromechanical properties of Masson pine wood (<i>Pinus massoniana</i> Lamb.)

Xinzhou WangCollege of Materials Science and Engineering, Nanjing Forestry University , Nanjing 210037 , P.R. ChinaXuanzong ChenCollege of Materials Science and Engineering, Nanjing Forestry University , Nanjing 210037 , P.R. ChinaXuqin XieYan WuCollege of Materials Science and Engineering, Nanjing Forestry University , Nanjing 210037 , P.R. ChinaLin-Guo ZhaoCollege of Chemistry, Nanjing Forestry University , Nanjing 210037 , P.R. ChinaYanjun LiCollege of Materials Science and Engineering, Nanjing Forestry University , Nanjing 210037 , P.R. ChinaSiqun WangCenter for Renewable Carbon, University of Tennessee , Knoxville, TN 37996 , USA

2018en

ABI

Аннотация

Abstract In an attempt to evaluate the effects of thermal treatment on wood cell walls (CWs), Masson pine ( Pinus massoniana Lamb.) wood was thermally modified (TM) at 150, 170 and 190°C for 2, 4 and 6 h, respectively. The chemical properties, cellulose crystallinity ( C r I) and micromechanics of the control and thermally modified wood (TMW) were analyzed by wet chemical analysis, X-ray diffraction and nanoindentation. The relative lignin content and C r I increased after the TM partly degraded the amorphous wood polymers. The relative lignin content was higher in TMW and the equilibrium moisture content decreased. Moreover, the elastic modulus ( E r ) and hardness ( H ) of TMW were lowered along with the creep ratio decrement ( C IT ) of CWs. However, a severe treatment (e.g. 190°C/6 h) may negatively affect the mechanical properties of CWs caused by the partial degradation of hemicelluloses and also cellulose.

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Идентификаторы

DOI: 10.1515/hf-2017-0205

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar