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密粘褶菌生物性降解对杉木木材性质的影响
陈美玲,张双燕,王传贵
0
(国际竹藤中心,北京 100102;安徽农业大学林学与园林学院,合肥 230036)
摘要:
选用密粘褶菌(Gloeophyllum trabeum (Pers.) Murrill)对杉木(Cunninghamia lanceolata (Lamb.) Hook.)木材进行生物性降解,研究不同降解时间对杉木木材化学成分、结晶度、微力学性能和微观形态的影响。结果表明,密粘褶菌不降解杉木木材的木质素,其中边材综纤维素、纤维素和半纤维含量在6周分别降低了6.91%、4.07%和13.34%;心材综纤维素、纤维素和半纤维含量在6周分别降低了6.84%、4.09%和12.97%。木腐菌处理后,杉木木材纤维素结晶度均有所降低;杉木的抗弯强度和抗弯弹性模量均呈现减小的趋势,18周时降到最低,杉木边材抗弯强度减少了46.17%,抗弯弹性模量减小了29.66%,心材抗弯强度减少了53.74%,抗弯弹性模量减少了47.74%。
关键词:  密粘褶菌  杉木  化学成分  结晶度  微力学性能
DOI:10.13610/j.cnki.1672-352x.20160512.002
基金项目:国家自然青年科学基金“木材细胞壁关键组分的力学贡献及其相互作用”(31200436)资助。
Wood properties of Chinese-fir after biological degradation by Gloeophyllum trabeum (Pers.) Murrill
CHEN Meiling,ZHANG Shuangyan,WANG Chuangui
(International Centre for Bamboo and Rattan, Beijing 100102;School of Forestry & Landscape Architecture, Anhui Agricultural University, Hefei 230036)
Abstract:
In this research, we studied the effect of degradation time on chemical component, crystallinity, micro-mechanical properties, and micromorphology when using Gloeophyllum trabeum to degrade Chinese-fir. The result showed that Gloeophyllum trabeum did not degrade Chinese-fir’s lignin. The mass fractions of holocellulose, cellulose, and hemicellulose in sapwood decreased by 6.91%, 4.07%, and 13.34%, and those in heartwood decreased by 6.84%, 4.09%, and 12.97% at the 6th week. After treated with wood rot fungi, the cellulose crystallinity, MOR, and MOE decreased and reached the minimum value at 18th week. The MOR and MOE of sapwood, and the MOR and MOE of the heartwood decreased by 46.17% and 29.66%, 53.74% and 47.74%, respectively.
Key words:  Gloeophyllum trabeum (Pers.) Murrill  Chinese-fir  chemical composition  crystallinity  micro-mechanical properties

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