Compatibility of preservative with adhesive in Eucalyptus grandis laminates

IF 1.3 Q2 MATERIALS SCIENCE, PAPER & WOOD

International Wood Products Journal Pub Date : 2021-12-22 DOI:10.1080/20426445.2021.2018101

A. Alade, Z. Naghizadeh, C. B. Wessels, Hannes Stolze, H. Militz

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引用次数: 2

Abstract

ABSTRACT The fundamental factors responsible for the complexities in adhesive bonding of preservative-treated wood are predominantly wood species, preservative composition, and adhesive system. It is post-effect of these factors that process variables such as assembly times and bonding pressure exert secondary influences on adhesive-bond development in preservative-treated laminates. Hence, this study investigated the effect of copper azole (CA) and disodium octaborate tetrahydrate (DOT) impregnations on E. grandis heartwood (HW) and sapwood (SW) bonding with melamine–urea–formaldehyde and polyurethane adhesives. Based on the adhesives and bonding conditions investigated, the CA and DOT-treated E. grandis laminates do not satisfy at least one of the shear strength and delamination requirements according to EN 14080:2013. Contrary to delamination, shear strength was significantly affected by the HW–SW difference. This study established the basis for further considerations on adapting bonding conditions for improved adhesive-bond performance in CA and DOT-treated E. grandis laminates towards manufacturing durable hardwood composite for tropical and subtropical environments.

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巨桉层压板中防腐剂与胶粘剂的相容性

摘要造成防腐处理木材粘合复杂性的基本因素主要是木材种类、防腐成分和粘合剂系统。正是这些因素的后效应，如组装时间和粘合压力等工艺变量对防腐处理层压板的粘合发展产生了次要影响。因此，本研究研究研究了唑铜（CA）和四水八硼酸二钠（DOT）浸渍对大白菜心材（HW）和边材（SW）与三聚氰胺-尿素-甲醛和聚氨酯粘合剂结合的影响。根据所研究的粘合剂和粘合条件，CA和DOT处理的E.grandis层压板不满足EN 14080:2013中至少一项剪切强度和分层要求。与分层相反，剪切强度受到HW-SW差异的显著影响。本研究为进一步考虑调整粘合条件以提高CA和DOT处理的E.grandis层压板的粘合性能，从而制造适用于热带和亚热带环境的耐用硬木复合材料奠定了基础。

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

International Wood Products Journal MATERIALS SCIENCE, PAPER & WOOD-

CiteScore

2.40

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