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Study on the effect of nano-silver impregnation on mechanical properties of heat-treated Populus nigra

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Abstract

The present study is aimed at investigating the effect of heat treatment of nano-silver-impregnated Populus nigra on weight loss, modulus of rupture (MOR), modulus of elasticity (MOE), and compression parallel to grain. Specimens were impregnated with 200 PPM water-based solution of nano-silver particles at 2.5 bar in a pressure vessel. For heat treatment, both nano-silver-impregnated and simple specimens were kept for 24 h at 45°C and then further for 24 h at 145°C and finally for 4 h at 185°C. MOR decreased from 529 to 461 kg/cm2 in heat-treated specimens; MOE and compression parallel to grain were though improved. Also, comparison between heat-treated and nano-silver-impregnated heat-treated specimens showed that there was a decrease in MOR and MOE in nano-silver-impregnated heat-treated specimens. This shows that nano-silver impregnation facilitates transfer of heat in wood and it may increase the process of degradation and pyrolysis of wood structures in deeper parts of specimens.

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Acknowledgments

The author is grateful to Dr. Mohammad Layeghi (associate professor at faculty of natural resources, The University of Tehran) for preparing nano-silver solution for the present study. Also, I would like to deeply thank Mr. Hossein Afshar, managing director of Afshar Wood-Machinery Manufacturing Co., for being instrumental in nano-silver impregnation treatment in pressure vessels.

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  1. Wood Industries Department, Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

    Hamid Reza Taghiyari

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  1. Hamid Reza Taghiyari
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Correspondence to Hamid Reza Taghiyari.

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Taghiyari, H.R. Study on the effect of nano-silver impregnation on mechanical properties of heat-treated Populus nigra . Wood Sci Technol 45, 399–404 (2011). https://doi.org/10.1007/s00226-010-0343-5

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  • DOI: https://doi.org/10.1007/s00226-010-0343-5

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