壳聚糖-咖啡因配方处理木材的物理和机械性能

IF 2.5 3区 农林科学 Q1 FORESTRY
Magdalena Woźniak, Jerzy Majka, Patrycja Kwaśniewska-Sip, Tomasz Krystofiak, Barbara Lis, Edward Roszyk, Grzegorz Cofta, Izabela Ratajczak
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引用次数: 0

摘要

人们对开发天然木材防腐剂越来越感兴趣,特别是为了应对环境退化带来的日益严重的挑战。咖啡因是一种生物基防腐剂,可以提高处理过的木材的抗腐性,然而,当木材暴露在水中时,咖啡因对木材的浸出也很敏感。结合壳聚糖-咖啡因配方限制了浸渍木材中咖啡因的浸出,从而增加了它在室外条件下的抵抗力。本研究旨在评估浸渍了壳聚糖-咖啡因配方的木材的性能,重点是润湿性(接触角测量),机械性能(弯曲强度)和吸附行为。接触角测量表明,与未经处理的木材和单独用咖啡因处理的木材相比,壳聚糖和壳聚糖-咖啡因处理的木材具有更好的耐水性。然而,这种抗性仅在短期应用中表现出来。在相对空气湿度为0 ~ 0.95的范围内,咖啡因和壳聚糖处理均降低了吸附和解吸阶段的平衡水分含量。壳聚糖-咖啡因配方在木材浸渍中的应用导致平衡含水率的降低,以及处理木材的吸湿性。所有配方变体处理对力学参数没有影响,包括弹性模量和断裂模量。此外,FTIR结果表明,咖啡因和壳聚糖都与木材成分相互作用。这些发现表明,壳聚糖-咖啡因配方是有前途的天然木材防腐剂,提供改善的吸湿性,同时保持处理木材的机械性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Physical and mechanical properties of wood treated with chitosan-caffeine formulations

There is growing interest in developing natural wood preservatives, particularly in response to the escalating challenges posed by environmental degradation. Caffeine is a bio-based preservative that improves decay resistance of treated wood, however it is also sensitive to leaching from wood when exposed to water. Combining chitosan-caffeine formulations limits the leaching of caffeine from impregnated wood, thereby increasing its resistance even under outdoor conditions. This research aimed to evaluate the properties of wood impregnated with chitosan-caffeine formulations, focusing on wettability (contact angle measurement), mechanical properties (bending strength), and sorption behavior. The contact angle measurement revealed that wood treated with chitosan and chitosan-caffeine formulations exhibited an improvement in water resistance compared to untreated wood and wood treated with caffeine alone. However, this resistance showed only for short-term application. Both caffeine and chitosan treatments reduced the equilibrium moisture content during adsorption and desorption phases in the relative air humidity range from 0 to 0.95. The application of chitosan-caffeine formulations for wood impregnation resulted in a reduction in equilibrium moisture content, as well as hygroscopicity of the treated wood. Treatment with all formulation variants had no effect on the mechanical parameters, including modulus of elasticity and modulus of rupture. In addition, FTIR results indicated that both caffeine and chitosan interact with wood components. These findings suggest that chitosan-caffeine formulations are promising as natural wood preservatives, offering an improved hygroscopicity while maintaining the mechanical properties of the treated wood.

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来源期刊
European Journal of Wood and Wood Products
European Journal of Wood and Wood Products 工程技术-材料科学:纸与木材
CiteScore
5.40
自引率
3.80%
发文量
124
审稿时长
6.0 months
期刊介绍: European Journal of Wood and Wood Products reports on original research and new developments in the field of wood and wood products and their biological, chemical, physical as well as mechanical and technological properties, processes and uses. Subjects range from roundwood to wood based products, composite materials and structural applications, with related jointing techniques. Moreover, it deals with wood as a chemical raw material, source of energy as well as with inter-disciplinary aspects of environmental assessment and international markets. European Journal of Wood and Wood Products aims at promoting international scientific communication and transfer of new technologies from research into practice.
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