酚醛树脂改性甜枫与南松试件耐候性比较研究

IF 1.2 4区农林科学 Q3 MATERIALS SCIENCE, PAPER & WOOD

Maderas-ciencia Y Tecnologia Pub Date : 2022-03-01 DOI:10.4067/s0718-221x2022000100417

Wenlong Hu, H. Wan

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引用次数: 9

摘要

根据ASTM标准，采用6次湿循环紫外光加速老化试验，研究了低分子量酚醛树脂对枫香(Liquidambar styraciflua)和南松(Pinus taeda)试件耐老化性能的影响，评估了木材的拒水性、尺寸稳定性和裂缝形成情况。结果表明:1)枫香四锯材的防水性高于南松四锯材和平锯材;2)浸渍低分子量酚醛树脂后，甜枫和南松样品的尺寸稳定性均得到改善，其中甜枫的尺寸稳定性更好;3)处理后的甜枫和南松标本的暴露端和表面裂纹明显多于对照，说明本研究中使用的低分子量酚醛树脂改性不能改善甜枫和南松标本的抗裂性能。一般情况下，根据尺寸稳定性和防水性，采用低分子量酚醛树脂浸渍甜枫比南松木更适合，以提高耐候耐久性。

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Comparative study on weathering durability property of phenol formaldehyde resin modified sweetgum and southern pine specimens

The effects of low molecular weight phenol formaldehyde resin on weathering durability property of sweetgum (Liquidambar styraciflua) and southern pine (Pinus taeda) specimens were studied using six wetdry cycles with ultraviolet light accelerated weathering test following ASTM via evaluating the water repellent efficiency, dimensional stability, and crack formation of wood. The results showed that 1) the water repellent efficiency of treated quarter-sawn sweetgum specimens was higher than those of treated quarter-sawn and flatsawn southern pine specimens; 2) the dimensional stabilities of sweetgum and southern pine specimens were all improved by impregnating low molecular weight phenol formaldehyde resin, especially for sweetgum; 3) there were clearly more cracks on exposed ends and surfaces of all treated sweetgum and southern pine specimens than those on control ones, indicating that the low molecular weight phenol formaldehyde resin modification used in this study were not able to improve the anti-cracking properties of sweetgum and southern pine specimens. Generally, the sweetgum was more suitable to be impregnated with low molecular weight phenol formaldehyde resin than southern pine with the procedure described according to dimensional stability and water repellent efficiency, in order to improve the weathering durability.

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来源期刊

Maderas-ciencia Y Tecnologia 工程技术-材料科学：纸与木材

CiteScore

2.60

自引率

13.30%

发文量

审稿时长

>12 weeks

期刊介绍： Maderas-Cienc Tecnol publishes inedits and original research articles in Spanish and English. The contributions for their publication should be unpublished and the journal is reserved all the rights of reproduction of the content of the same ones. All the articles are subjected to evaluation to the Publishing Committee or external consultants. At least two reviewers under double blind system. Previous acceptance of the Publishing Committee, summaries of thesis of Magíster and Doctorate are also published, technical opinions, revision of books and reports of congresses, related with the Science and the Technology of the Wood. The journal have not articles processing and submission charges.