Studies on improving the decay resistance and surface hardness of poplar wood impregnated with nano zinc oxide fortified poly(vinyl) acetate resin

IF 2.4 3区农林科学 Q1 FORESTRY

European Journal of Wood and Wood Products Pub Date : 2024-12-31 DOI:10.1007/s00107-024-02167-y

P. Nagraik, S. R. Shukla

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Abstract

Wood protection against bio-deteriorating agencies is of paramount importance in increasing the service life of wood products used in various applications ranging from construction to furniture manufacturing. In this study, the efficacy of nano zinc oxide (ZnO) fortified poly(vinyl) acetate (PVAc) against brown rot and white rot fungal decay was explored in fast-growing hardwood. Different concentrations of nano ZnO (1–5%) were blended with water-based PVAc resin (10–20%). The poplar (Populus deltoides) wood samples were pressure-impregnated with different concentrations of nanoparticle-fortified resin formulations to evaluate the effects on physico-mechanical properties and decay resistance. The impregnation of higher concentrations of nano ZnO fortified PVAc (3% ZnO fortified 20% PVAc) showed improvement in the end and side hardness of poplar wood by 42.93 and 76.88% respectively. The laboratory decay test results revealed significant protection conferred by nano ZnO-PVAc against brown and white rot fungal decay. Scanning electron microscopy (SEM) and elemental mapping revealed uniform distribution of the nanoparticles in the wood structure and morphological changes brought with fungal decay and Fourier transform infrared spectroscopy (FTIR) analysis revealed chemical changes induced by fungal decay. The findings of the present study suggest the potential utility of wood impregnation with nano ZnO-PVAc resin in the area of wood protection.

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纳米氧化锌强化聚醋酸乙烯酯树脂浸渍提高杨木耐腐性能和表面硬度的研究

在从建筑到家具制造的各种应用中，木材对生物变质剂的保护对于增加木制品的使用寿命至关重要。研究了纳米氧化锌（ZnO）强化聚醋酸乙烯酯（PVAc）对速生硬木褐腐和白腐真菌的防治效果。将不同浓度的纳米ZnO（1-5%）与水基PVAc树脂（10-20%）共混。采用不同浓度的纳米颗粒强化树脂对杨木样品加压浸渍，考察其物理力学性能和耐腐性能的影响。较高浓度的纳米ZnO强化PVAc （3% ZnO强化20% PVAc）浸渍后，杨木的端部和侧部硬度分别提高了42.93%和76.88%。实验室腐烂试验结果表明，纳米ZnO-PVAc对褐腐和白腐真菌腐烂具有显著的保护作用。扫描电镜（SEM）和元素图谱显示纳米颗粒在木材结构中的均匀分布和真菌腐烂带来的形态变化，傅里叶变换红外光谱（FTIR）分析显示真菌腐烂引起的化学变化。本研究结果表明，纳米ZnO-PVAc树脂浸渍木材在木材保护领域具有潜在的用途。

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来源期刊

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.