Structural Characterization of the Variable Uptake and Distribution of Impregnation Fluids in Fast-Growing Poplar Hybrids

速生杨杂种中浸渍液的可变吸收和分布的结构特征

• 批准号: 275616905
• 负责人: Professor Dr. Holger Militz
• 金额: --
• 依托单位: Abteilung Holzbiologie und Holzprodukte
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/275616905?language=en
• 关键词: Structural; Characterization; Variable; Uptake; Distribution

Due to the steadily increasing availability of hardwoods, hardwoods will continuously gain economic and scientific interest in future. In addition to forest-relevant wood species, fast-growing wood species for agroforestry purposes, such as poplar, are becoming increasingly available to the wood-based industry. In outdoor applications, however, many hardwood species have a low durability against biological degradation. A fundamental prerequisite for the protection of the wood applied is a deep and homogeneous impregnation with wood preservatives or modification agents. However, many hardwoods reveal often an improper and uneven penetration and distribution of impregnation fluids. Up to now, the cause of this has not been completely researched yet. Therefore, this research project investigates by means of different hydrides of poplar, which anatomical causes (e.g. reaction wood, tyloses, cell parameters) lead to the uneven distribution on the macroscopic and microscopic level during impregnation. To answer that samples are impregnated with a solution, containing a fluorescent dye (i.e. Rhodamine B), and examined through light and scanning electron microscopy. In addition, the poplar anatomy and the distribution of a lumen-filling impregnation chemical (i.e. methacrylate) are analyzed three-dimensionally by means of micro-computed tomography.

由于硬木的供应量稳步增加，未来硬木将不断获得经济和科学利益。除了与森林相关的木材品种外，用于农林业目的的快速生长的木材品种（例如杨树）也越来越多地用于木材工业。然而，在户外应用中，许多硬木树种对生物降解的耐久性较低。保护所用木材的一个基本先决条件是用木材防腐剂或改性剂进行深度且均匀的浸渍。然而，许多硬木经常表现出浸渍液的不适当和不均匀的渗透和分布。截至目前，其原因尚未完全研究清楚。因此，本研究项目通过不同的杨树氢化物来研究解剖学上的原因（例如反应木、tyloses、细胞参数）导致浸渍过程中宏观和微观水平上的不均匀分布。为了回答这个问题，将样品浸入含有荧光染料（即罗丹明 B）的溶液中，并通过光学显微镜和扫描电子显微镜进行检查。此外，还通过微型计算机断层扫描对杨树的解剖结构和内腔填充浸渍化学品（即甲基丙烯酸酯）的分布进行了三维分析。