Scholarlink

<p>This study investigates the influence of incorporating 5% gray and white Portland cement on the electrical resistivity of wood–cement biocomposites manufactured from <i>Pinus pseudostrobus</i> sawdust and a wheat-protein adhesive. Three composite formulations were prepared: a control (no cement), gray-cement (MCgray), and white-cement (MCwhite) composites. Test specimens were fabricated under controlled thermal and humidity conditions and evaluated for density and electrical resistivity in transverse and parallel directions. Statistical analyses revealed that the addition of cement significantly affected both density and electrical resistivity. The density increased by approximately 7% for MCgray and 2.3% for MCwhite compared with the control. Electrical resistivity decreased markedly for both cement-containing composites: gray cement reduced resistivity by approximately 70%, while white cement achieved up to 75% reduction, with lower values in the parallel direction. These differences were attributed to the formation of conductive pathways associated with hydrated cement phases and ionic migration within the wheat-protein matrix. The results confirm that even low cement dosages of 5% substantially alter the microstructural compactness and conduction mechanisms of lignocellulosic composites. Notably, the comparable conductivity performance of white and gray cements suggests that oxide purity (Fe₂O₃ content) is not the only determining factor in electrical transport. This work provides at quantitative comparison of gray and white cements in wood-based biocomposites, contributing to the development of multifunctional, bio-based materials with tunable electrical properties.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Electrical resistivity of wood–cement biocomposites of Pinus pseudostrobus

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月12日

查看全文
  • Sonia Correa Jurado,
  • Javier Ramón Sotomayor Castellanos,
  • José Guadalupe Rutiaga Quiñones,
  • Firas Hawasly,
  • Koji Adachi

摘要

This study investigates the influence of incorporating 5% gray and white Portland cement on the electrical resistivity of wood–cement biocomposites manufactured from Pinus pseudostrobus sawdust and a wheat-protein adhesive. Three composite formulations were prepared: a control (no cement), gray-cement (MCgray), and white-cement (MCwhite) composites. Test specimens were fabricated under controlled thermal and humidity conditions and evaluated for density and electrical resistivity in transverse and parallel directions. Statistical analyses revealed that the addition of cement significantly affected both density and electrical resistivity. The density increased by approximately 7% for MCgray and 2.3% for MCwhite compared with the control. Electrical resistivity decreased markedly for both cement-containing composites: gray cement reduced resistivity by approximately 70%, while white cement achieved up to 75% reduction, with lower values in the parallel direction. These differences were attributed to the formation of conductive pathways associated with hydrated cement phases and ionic migration within the wheat-protein matrix. The results confirm that even low cement dosages of 5% substantially alter the microstructural compactness and conduction mechanisms of lignocellulosic composites. Notably, the comparable conductivity performance of white and gray cements suggests that oxide purity (Fe₂O₃ content) is not the only determining factor in electrical transport. This work provides at quantitative comparison of gray and white cements in wood-based biocomposites, contributing to the development of multifunctional, bio-based materials with tunable electrical properties.