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<p>The rice straw pulp black liquor (RSBL) is high-alkalinity wastewater rich in silica, which renders its known use as a fuel in pulping mills difficult. We explored the economic utilization of RSBL <i>via </i>alkaline precipitation, affording metal lignin/silica hybrids. Our current study focuses on exploring the electrical characteristics of newly developed composites by integrating different ratios of a prepared conductive copper/lignin/silica (Cu–LSF) hybrid into rice straw cellulosic pulp, produced through solar pulping. We also compare the properties of these rice straw-based composites with those prepared using conventionally pulped bagasse. All the prepared samples were characterized using a combination of techniques, including X-ray diffraction, and scanning electron microscopy. Their permittivity and dielectric loss were also measured. Rice straw-based composites containing higher dielectric silica contents exhibited superior permittivity and dielectric loss performance compared to bagasse-based composites.</p>

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Conductive cellulosic pulp composites reinforced with copper-silica hybrid

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月12日

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  • Hoda Sabry Othman,
  • Azza Abbas M. Ward,
  • Sawsan Dacrory,
  • Galal A. M. Nawwar

摘要

The rice straw pulp black liquor (RSBL) is high-alkalinity wastewater rich in silica, which renders its known use as a fuel in pulping mills difficult. We explored the economic utilization of RSBL via alkaline precipitation, affording metal lignin/silica hybrids. Our current study focuses on exploring the electrical characteristics of newly developed composites by integrating different ratios of a prepared conductive copper/lignin/silica (Cu–LSF) hybrid into rice straw cellulosic pulp, produced through solar pulping. We also compare the properties of these rice straw-based composites with those prepared using conventionally pulped bagasse. All the prepared samples were characterized using a combination of techniques, including X-ray diffraction, and scanning electron microscopy. Their permittivity and dielectric loss were also measured. Rice straw-based composites containing higher dielectric silica contents exhibited superior permittivity and dielectric loss performance compared to bagasse-based composites.