Scholarlink

<p>With the rising demand for sustainable materials in advanced electronics, biomedical devices, and protective systems, there is an increasing necessity for biodegradable nanocomposites that offer a balance between mechanical strength and electromagnetic shielding performance. This study investigates the synergistic effects of dual fillers, polyaniline (PANi) and magnetite (Fe₃O₄), at low concentrations on PLA/Mater-Bi starch composites. The hybrid nanocomposites were fabricated using twin-screw extrusion followed by hot/cold pressing. PANi enhanced the interfacial interaction between PLA and starch, creating a more homogeneous morphology. At 0.3 wt%, PANi improved tensile strength by 22% and increased elongation at break by 233% (from 5.4% to 18.0%). The incorporation of 0.6 wt% Fe<sub>3</sub>O<sub>4</sub> further increased the tensile strength to 47.8&#xa0;MPa while maintaining flexibility. All nanocomposites exhibited soft magnetic behavior with low coercivity, and saturation magnetization increased with higher Fe₃O₄ content. Radiation shielding properties including mass and linear attenuation coefficients (59% increase in LAC, 37% reduction in HVL at 0.03&#xa0;MeV), effective atomic number, and fast neutron removal cross-section, were significantly enhanced with increasing Fe₃O₄ loading. The nanocomposite containing 1.0 wt% Fe₃O₄ demonstrated shielding performance comparable to conventional materials like water and concrete, while offering advantages in reduced density and flexibility. A preliminary LCA showed that these composites have a lower environmental footprint, with up to 78% less fossil resource use and 39% lower carbon emission compared to polyethylene. These findings suggest the potential of PANi/Fe₃O₄-reinforced PLA-based nanocomposites as sustainable, multifunctional materials for lightweight radiation shielding applications.</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

Sustainable magnetite reinforced PLA/Mater-Bi starch/PANi nanocomposites: toward flexible, magnetic, and radiation-protective materials

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月21日

查看全文
  • Sinyee Gan,
  • Ruey Shan Chen,
  • Moayad Husein Flaifel,
  • Ting Yang,
  • Dalila Shahdan,
  • M. Kh Hamad,
  • M. H. A. Mhareb,
  • Ing Kong,
  • Xiangwen Fan,
  • Jonathan Woon Chung Wong,
  • Sahrim Ahmad

摘要

With the rising demand for sustainable materials in advanced electronics, biomedical devices, and protective systems, there is an increasing necessity for biodegradable nanocomposites that offer a balance between mechanical strength and electromagnetic shielding performance. This study investigates the synergistic effects of dual fillers, polyaniline (PANi) and magnetite (Fe₃O₄), at low concentrations on PLA/Mater-Bi starch composites. The hybrid nanocomposites were fabricated using twin-screw extrusion followed by hot/cold pressing. PANi enhanced the interfacial interaction between PLA and starch, creating a more homogeneous morphology. At 0.3 wt%, PANi improved tensile strength by 22% and increased elongation at break by 233% (from 5.4% to 18.0%). The incorporation of 0.6 wt% Fe3O4 further increased the tensile strength to 47.8 MPa while maintaining flexibility. All nanocomposites exhibited soft magnetic behavior with low coercivity, and saturation magnetization increased with higher Fe₃O₄ content. Radiation shielding properties including mass and linear attenuation coefficients (59% increase in LAC, 37% reduction in HVL at 0.03 MeV), effective atomic number, and fast neutron removal cross-section, were significantly enhanced with increasing Fe₃O₄ loading. The nanocomposite containing 1.0 wt% Fe₃O₄ demonstrated shielding performance comparable to conventional materials like water and concrete, while offering advantages in reduced density and flexibility. A preliminary LCA showed that these composites have a lower environmental footprint, with up to 78% less fossil resource use and 39% lower carbon emission compared to polyethylene. These findings suggest the potential of PANi/Fe₃O₄-reinforced PLA-based nanocomposites as sustainable, multifunctional materials for lightweight radiation shielding applications.