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<p>To address the limitations of conventional strippable materials (prolonged curing, poor substrate adaptability), this study developed a novel decontamination composite by incorporating tetrasodium iminodisuccinate (IDS) modified sodium montmorillonite (Na-Mt) into two-component polyurethane (2KPU). The modified Na-Mt exhibited expanded interlayer spacing (1.26 → 1.51 nm) and enhanced adsorption capacities for Cs(I), Sr(II), and Cd(II) by 58.5, 66.8, and 45.2 mg/g, respectively. Optimized composites achieved 21.6% higher peel strength, 12°C increased thermal stability, and &gt; 95% decontamination rates across substrates (99.6% for Cs). Notably, rough-surface decontamination efficiency surpassed pure 2KPU by 6%. This fast-curing (≤ 30 min), high-performance material demonstrates significant potential for radionuclide removal in nuclear facility applications.</p>

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Preparation of environment-friendly chelator-modified sodium-based montmorillonite/two-component polyurethane strippable materials and their performance of radionuclide removal

  • 期刊论文

  • 发表日期：

    2025年7月3日

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  • Wentao Zhou,
  • Yali Gao,
  • Jianhang Cao,
  • Ziyuan Zhang,
  • Fenghua Kang,
  • Ke Ran,
  • Zhiyu He,
  • Shixuan Zhou,
  • Yintao Li

摘要

To address the limitations of conventional strippable materials (prolonged curing, poor substrate adaptability), this study developed a novel decontamination composite by incorporating tetrasodium iminodisuccinate (IDS) modified sodium montmorillonite (Na-Mt) into two-component polyurethane (2KPU). The modified Na-Mt exhibited expanded interlayer spacing (1.26 → 1.51 nm) and enhanced adsorption capacities for Cs(I), Sr(II), and Cd(II) by 58.5, 66.8, and 45.2 mg/g, respectively. Optimized composites achieved 21.6% higher peel strength, 12°C increased thermal stability, and > 95% decontamination rates across substrates (99.6% for Cs). Notably, rough-surface decontamination efficiency surpassed pure 2KPU by 6%. This fast-curing (≤ 30 min), high-performance material demonstrates significant potential for radionuclide removal in nuclear facility applications.