Radial cracks in Castanopsis hystrix wood and its dimensional stability improvement by resin-impregnated modification

IF 2.2 3区农林科学 Q2 FORESTRY

Holzforschung Pub Date : 2023-11-14 DOI:10.1515/hf-2023-0073

Surong Meng, Yingying Su, Anmin Huang, Bailing Sun

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引用次数: 0

Abstract

Abstract This study investigated the characteristics of radial cracks in Castanopsis hystrix wood and evaluated its dimensional stability after impregnation with low-molecular-weight polyacrylate (PA), melamine-urea-glyoxal (MUG), and melamine-urea-formaldehyde (MUF) resins. The physical properties were examined by dimensional stability measurements, dynamic vapor sorption (DVS) analysis, and scanning electron microscopy (SEM). The results showed that radial cracks were easily produced in the transverse section of untreated wood during drying. The surfaces of the radial cracks exhibited an even and clean structure without fluffs on the pair of surfaces, and cracks spanned 4–5 annual rings. The resin-impregnated wood showed no radial cracks on its transverse surface. C. hystrix wood modified with MUG and MUF exhibited a higher weight percentage gain (WPG) than wood modified with the same concentration of PA resin. The resin-impregnated C. hystrix wood also showed reduced anisotropy and improved dimensional stability. The SEM images of the modified wood showed that the wood pits and cells were filled with resin, while the cell wall surfaces were covered with a layer of resin.

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蓖麻木材径向裂纹及树脂浸渍改性对其尺寸稳定性的改善

摘要研究了桃壳栲木材径向裂纹的特征，并评价了低分子聚丙烯酸酯(PA)、三聚氰胺-尿素-乙二醛(MUG)和三聚氰胺-尿素-甲醛(MUF)树脂浸渍后桃壳栎木材的尺寸稳定性。通过尺寸稳定性测量、动态蒸气吸收(DVS)分析和扫描电子显微镜(SEM)检查了其物理性质。结果表明:未经处理的木材在干燥过程中，其横截面容易产生径向裂纹;径向裂纹表面结构均匀干净，对表面无绒毛，裂纹跨越4 ~ 5年轮。树脂浸渍木材的横向表面无径向裂纹。与相同浓度的PA树脂改性的木材相比，用MUG和MUF改性的木材具有更高的增重百分比(WPG)。树脂浸渍后的木丝各向异性降低，尺寸稳定性提高。改性木材的SEM图像显示，木坑和细胞被树脂填充，细胞壁表面覆盖了一层树脂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Holzforschung 工程技术-材料科学：纸与木材

CiteScore

4.60

自引率

4.20%

发文量

审稿时长

3.3 months

期刊介绍： Holzforschung is an international scholarly journal that publishes cutting-edge research on the biology, chemistry, physics and technology of wood and wood components. High quality papers about biotechnology and tree genetics are also welcome. Rated year after year as one of the top scientific journals in the category of Pulp and Paper (ISI Journal Citation Index), Holzforschung represents innovative, high quality basic and applied research. The German title reflects the journal''s origins in a long scientific tradition, but all articles are published in English to stimulate and promote cooperation between experts all over the world. Ahead-of-print publishing ensures fastest possible knowledge transfer.