饱水木质文物的理化性能和微观结构表征

通过对2002年河南信阳长台关出土梓木的基本性能分析表明,出土梓木已遭受严重腐蚀。显微分析、化学分析和红外分析均表明出土梓木的多糖类物质发生了严重降解和溶出,但木质素相对含量增加。多糖类物质的降解提高了木材纤维素的亲水性,增加了木材的孔隙,是导致出土梓木饱和绝对含水率增加、基本密度降低和力学强度降低的根本原因。富含木质素的胞间层保存完整是出土饱水梓木仍能保持完整的外形的主要原因。

The Microstructure of Ancient Water-logged Cultural Relics

After conducting research on the unearthed Chinese catalpas in 2002,heavy erosion can be found on those woods.Micro,chemical and ultra-infrared analysis prove that the polyose material of these catalpas appeared severe degradation dissolution,but lignin amount increased.The dissolution of polyose increases hydrophilicity and holes of wood fibers,results in the raise of absolute moisture content,the decline of basic density and stress intensity.The reason for the well-preserved woods to be found lies in the intercellular layers rich in lignin.