基于X射线剖面密度仪和FTIR快速测定两种实木地板材的物理化学性能

Rapid Determination of Physical and Chemical Properties of Two Kinds of Solid Floor Woods with XRD and FTIR Approaches

实木地板作为一种天然环保的地面铺装材料,得到越来越多消费者的选择,需求量日益剧增,而如何快速了解和检测木材材性一直是地板选材和质量检测急需解决的问题。采用了X射线剖面密度仪和傅里叶红外光谱仪(FTIR)两种快速检测技术,对市场上常用的进口地板材番龙眼和香二翅豆的剖面密度和化学主要组成成分进行了快速测定;同时采用直接测量法测量了木材的基本密度值,并将两种地板材快速测定密度值与实测密度值进行了相关性分析。剖面密度分析结果表明,香二翅豆的平均密度高于番龙眼的平均密度,两种地板材质地均匀性都很好;相关性数据表明番龙眼与香二翅豆两种地板材剖面密度的平均值与其基本密度值都具有很好的相关性,拟合后的相关系数达到了0.983和0.981,所有样品的两种密度的相关系数为0.991;傅里叶红外光谱分析结果表明香二翅豆的抽提物含量要高于番龙眼,香二翅豆木质素的特征峰I1 507/I1 425,I1 507/I1 740的高度比值高于番龙眼的,而纤维素的特征峰I895/I1 425,I895/I1 507高度比值低于番龙眼的,表明香二翅豆的木质素含量高于番龙眼,纤维素含量低于番龙眼。由此可见,X射线剖面密度仪可以快速检测出木材的质地均匀性以及预测木材基本密度值,而FTIR可以快速检测木材化学组分相对含量的高低,两种方法结合可以对实木地板材以及其他木材的物理化学性能进行快速检测。

As a kind of natural and environmental paving materials,the solid wood flooring has become popular among people whose demand isincreasing day by day.However,how to understand and detect wood properties quickly has been a urgent problem to be solved for material selection and qualityinspection.So the profile densities of two kinds of import solid wood floorings made of Dipteryx odorata,Pometia spp.were quickly detected for physicalproperties and major chemical compositions by using rapid detection technology,X-ray scanning method and fourier transfoum infrared spectrum(FTIR).At the same time,the basic density of wood was measured by direct measurement and we also analyzed the correlation between the rapid detection density and the basic density of the two kinds floors.The profile density results showed that the density of Dipteryx odorata was higherthan that of Pometia spp.and the heterogeneity of two kinds solid wood weregreat,correlation analysis data showed that there was a high correlation between the average of profile density and the basic density,the correlation coefficients of fitted parameters were 0.983 and 0.981,respectively.Besides the correlation coefficients of all materials was 0.991.The FTIR results showed that the extracts of Dipteryx odorata was higher than that of Pometiaspp.,the lignin characteristic peaks intensity ratio of I 1 507/I1 425,I 1 507/I 1 740 of Dipteryx odorata was higher thanthat of Pometia spp.,while the cellulose characteristic peaks intensity ratio of I 1 507/I 1 425,I 1 507/I 1740 was less than that of Pometia spp..The results showed that the lignin content of Dipteryx odorata was higher than that of Pometia spp.,while the cellulose content was less than that of Pometia spp.Thus,the X-ray scanning method can quickly detect the heterogeneity of the wood and also canpredict the basic density.While the FTIR can quickly detect the relative content of wood chemical components,so the combination of the two methods candetect the physical and chemical properties of solid floor woods and other lumbers rapidly.