Determination of modulus of elasticity and bending strength of wood material impregnated with nanoparticle silicon dioxide (SiO2)

Abdurrahman Karaman,Mehmet Nuri Yıldırım,Şekip Şadiye Yaşar

doi:10.18182/tjf.462611

Abstract

The purpose of this study is to determine the effects of the nano-particulate silicon dioxide (SiO2) material on the bending strength and modulus of elasticity in bending of some wood species. Oriental beech (Fagus orientalis L.) and sessile oak (Quercus petrea L.) woods species which are commonly used in the furniture industry were used in this study. Impregnation was carried out with the preparation of SiO2 at concentrations of 1% and 3% according to ASTM-D 1413-76 (1976) standards. According to the results, while solution concentration was increasing in both wood species, total retention (kg/m3) and percentage retention (%) values increased; air dry density (12%), bending strength and modulus of elasticity in bending decreased. The maximum mean values of bending strength and modulus of elasticity was in control samples of oriental beech and the minimum were in sessile oak wood with 3% concentration. These results can be related to the fact that the higher density of oriental beech wood (0.630-0.685 g/cm³). In both species of wood, impregnation with SiO2 resulted loss of about 3-5% in bending strength and 0.6-9% in modulus of elasticity.

Highlights

The wood material which stays in natural conditions can get destroyed in under 5 years (Ors and Keskin, 2001; Ozcifci, 2009; Tan and Peker, 2015a; Tan and Peker, 2015b; Keskin and Daglioglu, 2016)
The variety n air dry density values of impregnated wood material can be stated to originate from solution concentration, chemical compounds, participation level of earlywood and latewood, annual ring width, cell lumen diameter, cell wall thickness and air void ratio depending on the anatomic structure of wood materials
This study is to determine the effects of the nanoparticulate silicon dioxide (SiO2) material on the bending strength and modulus of elasticity in bending of oriental beech and sessile oak woods

Summary

Introduction

The wood material which stays in natural conditions can get destroyed in under 5 years (except some certain wood species) (Ors and Keskin, 2001; Ozcifci, 2009; Tan and Peker, 2015a; Tan and Peker, 2015b; Keskin and Daglioglu, 2016). The service life of wood can increase with impregnation with wood preservative materials (Archer and Lebow, 2006; Hill, 2006; Tondi et al, 2012, Sandberg et al, 2017, Yasar and Altunok, 2019). The effectiveness of impregnation process depends on toxicity of preservative substance, penetration depth and retention amount, anatomic structure of the wood, slitting and drying processes conducted before impregnation (Bozkurt et al, 1993; Yalinkilic et al, 1996; Baysal, 2003; Baysal et al, 2003; Archer and Lebow, 2006; Tan and Peker, 2015a; Tan and Peker, 2015b). EPA, has proposed label changes of some wood preservatives (chromated arsenicals, pentachlorophenol and creosote) to avoid creating human health and environmental concerns (US. EPA, 2016)

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