Scholarlink

<p>Aiming at the low utilization rate of copper tailings (CTS), this study proposes using CTS as a flame-retardant material, leveraging its content of silicon, aluminum, iron and other metallic elements. By introducing the composite system of CTS and aluminum hypophosphite (AHP) into the preparation process of rigid polyurethane foam (RPUF), flame-retardant RPUF composites were successfully developed. Flame-retardant tests show that the R-CTS/2AHP sample achieves a limiting oxygen index (LOI) of 23.7 vol% and a UL-94&#xa0;V-0 rating, indicating outstanding self-extinguishing ability. Thermal stability analysis indicated that the synergistic effect of CTS and AHP significantly improved the high-temperature resistance of the composites, with the char residue at 800&#xa0;℃ jumping from 16.7 mass% of pristine RPUF to 37.4 mass% of R-CTS/2AHP. Combustion behavior studies further confirmed that this composite system could suppress the release of heat and smoke during combustion. Specifically, compared with the pristine sample, the peak heat release rate (PHRR), total heat release (THR), peak smoke production rate (PSPR) and total smoke production (TSP) of R-CTS/2AHP were reduced by 14.3%, 14.7%, 16.3% and 31%, respectively. This study not only broadens the application scope of CTS in the field of flame retardancy, but also provides novel insights and theoretical support for the high-value utilization of industrial solid wastes.</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

Valorization of copper tailings: synergistically endowing rigid polyurethane foams with excellent flame retardancy via aluminum hypophosphite

  • 期刊论文

  • 发表日期：

    2026年4月28日

查看全文
  • Cunlong Fu,
  • Po Sun,
  • Gang Tang,
  • Zicheng Xu,
  • Xiaoyan Du,
  • Dan Deng,
  • Mingfu Ye,
  • Kang Dai,
  • Xiuyu Liu

摘要

Aiming at the low utilization rate of copper tailings (CTS), this study proposes using CTS as a flame-retardant material, leveraging its content of silicon, aluminum, iron and other metallic elements. By introducing the composite system of CTS and aluminum hypophosphite (AHP) into the preparation process of rigid polyurethane foam (RPUF), flame-retardant RPUF composites were successfully developed. Flame-retardant tests show that the R-CTS/2AHP sample achieves a limiting oxygen index (LOI) of 23.7 vol% and a UL-94 V-0 rating, indicating outstanding self-extinguishing ability. Thermal stability analysis indicated that the synergistic effect of CTS and AHP significantly improved the high-temperature resistance of the composites, with the char residue at 800 ℃ jumping from 16.7 mass% of pristine RPUF to 37.4 mass% of R-CTS/2AHP. Combustion behavior studies further confirmed that this composite system could suppress the release of heat and smoke during combustion. Specifically, compared with the pristine sample, the peak heat release rate (PHRR), total heat release (THR), peak smoke production rate (PSPR) and total smoke production (TSP) of R-CTS/2AHP were reduced by 14.3%, 14.7%, 16.3% and 31%, respectively. This study not only broadens the application scope of CTS in the field of flame retardancy, but also provides novel insights and theoretical support for the high-value utilization of industrial solid wastes.