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<p>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 (<i>Populus deltoides</i>) 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.</p>

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

  • 期刊论文

  • 发表日期：

    2024年12月31日

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  • P. Nagraik,
  • S. R. Shukla

摘要

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.