文献类型：期刊文献

英文题名：ACETYLATION OF PLANTATION SOFTWOOD WITHOUT CATALYSTS OR SOLVENTS

作者：Sun, Bailing[1] Chai, Yubo[1] Liu, Junliang[1] Militz, Holger[2]

第一作者：孙柏玲

通信作者：Chai, YB[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Univ Gottingen, Fac Forestry & Forest Ecol, Wood Biol & Wood Prod, Busgenweg 4, D-37077 Gottingen, Germany

年份：2019

卷号：64

期号：5

起止页码：799-810

外文期刊名：WOOD RESEARCH

收录：;EI(收录号：20200308044772);Scopus(收录号：2-s2.0-85077807427);WOS:【SCI-EXPANDED(收录号:WOS:000493901600005)】；

基金：The authors acknowledge the financial support from the Fundamental Research Funds of the Central Public Welfare Institutes, Chinese Academy of Forestry (CAFYBB2018GC006).

语种：英文

外文关键词：Acerylation; plantation softwood; acetic anhydride; dimensional stability

摘要：This study explored acetylation of wood of Larix kaempferi (Lamb.) Carr. and Pinus sylvestris var. mongoliea Litv. without catalysts or solvents. Both wood samples were impregnated with acetic anhydride and subsequently heated to 120*C for different reaction durations (0.5-8 h) in the esterification reagent. The extent of acetylation was measured by weight percent gain (WPG), which varied from 12.0% to 21.7% and 13.6% to 22.3% for both wood species. The cell wall bulking and anti-shrink efficiency (ASE) started to increase faster and then increase slower with increasing reaction time. As the WPG reached 19.2% and 17.8% or more separately, ASE of both acetylated wood were above 50% in any RH conditions. FTIR, CP/MAS 13 C NMR, and XPS studies produced evidences for acetylation of both wood species. The degree of acetylation of wood cell wall polymers increased with increasing WPG, but during the process degradation of lignin and acid hydrolysis of carbohydrates occurred.