ABSTRACT

In this study, it is aimed to consider whether the strain energy could evaluate the mechanical durability of wood. To investigate the aging effects on the mechanical properties of bulk wood and cellulose microfibrils in the cell walls of wood, XRD measurements were taken under tensile loading. Specimens were recent wood and wood used for 250 years (aged wood). Thermal modifications were further applied for additionally aging treatment of both specimens. The standardized strain energy of the bulk wood and cellulose microfibrils was exponentially reduced with increasing mass loss of specimens. The reduction degree of aged wood was smaller than that of recent wood. Using this phenomenon, it was proposed that the aging effect can be quantitatively evaluated.

摘要

在本研究中，旨在考虑应变能是否可以评估木材的机械耐久性。为了研究老化对木材细胞壁中散装木材和纤维素微纤维的机械性能的影响，在拉伸载荷下进行了 XRD 测量。标本是最近使用的木材和使用了 250 年的木材（老化木材）。进一步应用热改性以对两个样品进行额外的时效处理。散装木材和纤维素微纤维的标准化应变能随着样品质量损失的增加呈指数下降。陈年木材的还原度小于新材。利用这种现象，有人提出可以定量评估老化效果。