Othman Hoda Sabry, Ward Azza Abbas M, Dacrory Sawsan, Nawwar Galal A M
Green Chemistry Department, National Research Centre, Giza, Egypt.
Microwave Physics and Dielectrics Department, National Research Centre, Giza, Egypt.
Sci Rep. 2025 Sep 12;15(1):32503. doi: 10.1038/s41598-025-17701-y.
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.
稻草浆黑液（RSBL）是一种富含二氧化硅的高碱性废水，这使得它在制浆厂用作燃料的已知用途变得困难。我们通过碱沉淀探索了RSBL的经济利用方式，得到了金属木质素/二氧化硅杂化物。我们目前的研究重点是通过将不同比例的制备好的导电铜/木质素/二氧化硅（Cu-LSF）杂化物整合到通过太阳能制浆生产的稻草纤维素浆中，来探索新开发复合材料的电学特性。我们还将这些稻草基复合材料的性能与使用传统制浆甘蔗渣制备的复合材料的性能进行比较。所有制备的样品都使用包括X射线衍射和扫描电子显微镜在内的多种技术进行了表征。还测量了它们的介电常数和介电损耗。与甘蔗渣基复合材料相比，含有较高介电二氧化硅含量的稻草基复合材料表现出优异的介电常数和介电损耗性能。
