Scholarlink

<p>To enhance the performance of polyurethane materials and introduce multifunctional characteristics, thereby expanding their applications across various fields, this study conducted a series of modification experiments and performance evaluations. Initially, porous carbon material (PC) was synthesized using a carbonization-activation method, serving as a carrier for Fe<sub>3</sub>O<sub>4</sub> particles. This process led to the successful creation of the Fe<sub>3</sub>O<sub>4</sub>/PC composite. Subsequently, this composite was used as a modifier to produce waterborne polyurethane (PC-FWPU) through in-situ polymerization. The structure and properties of the Fe<sub>3</sub>O<sub>4</sub>/PC composites were systematically examined, focusing on how varying the amount of Fe<sub>3</sub>O<sub>4</sub>/PC affected the stability of the PC-FWPU composite emulsion and the properties of the resulting film. The study’s results revealed that the porous carbon synthesized here boasts a high specific surface area of 1387.90&#xa0;m²/g and a hierarchical pore structure, offering ample spatial sites and structural support for the uniform loading of Fe<sub>3</sub>O<sub>4</sub> nanoparticles. Measurements of water contact angle, thermogravimetric analysis (TGA), and mechanical properties showed that incorporating Fe<sub>3</sub>O<sub>4</sub>/PC composites significantly enhanced the water resistance, thermal stability, and mechanical performance of the PC-FWPU films. At an optimal Fe<sub>3</sub>O<sub>4</sub>/PC loading of 4.0 wt%, the PC-FWPU composite film exhibited a water contact angle of 134.6°, demonstrating excellent hydrophobicity. The temperature at which 50% weight loss occurs (T<sub>50%</sub>) increased markedly from 298.1℃ for pure waterborne polyurethane (WPU) to 388.7℃, reflecting a 30.4% enhancement. Concurrently, the tensile strength rose from 17.32&#xa0;MPa to 30.97&#xa0;MPa, a significant increase of 78.8%. Additionally, the introduction of Fe<sub>3</sub>O<sub>4</sub>/PC imparted certain magnetic and electrical conductive properties to the WPU matrix. The PC-FWPU composite film achieved a maximum saturation magnetization of 1.36 emu/g and an electrical conductivity of 3.6 × 10⁻⁶ S/cm. These findings lay the groundwork for applying these composites in advanced fields such as smart materials.</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

Fe₃O₄/PC hybrid fillers for waterborne polyurethane: simultaneous enhancement of hydrophobicity, thermal stability, mechanical strength, and magnetic properties

  • 期刊论文

  • 发表日期：

    2026年7月24日

查看全文
  • Lei Lin,
  • Xiaofen Zhao,
  • Zemin He,
  • Zongcheng Miao,
  • Xiangbo Feng,
  • Yuzhen Zhao

摘要

To enhance the performance of polyurethane materials and introduce multifunctional characteristics, thereby expanding their applications across various fields, this study conducted a series of modification experiments and performance evaluations. Initially, porous carbon material (PC) was synthesized using a carbonization-activation method, serving as a carrier for Fe3O4 particles. This process led to the successful creation of the Fe3O4/PC composite. Subsequently, this composite was used as a modifier to produce waterborne polyurethane (PC-FWPU) through in-situ polymerization. The structure and properties of the Fe3O4/PC composites were systematically examined, focusing on how varying the amount of Fe3O4/PC affected the stability of the PC-FWPU composite emulsion and the properties of the resulting film. The study’s results revealed that the porous carbon synthesized here boasts a high specific surface area of 1387.90 m²/g and a hierarchical pore structure, offering ample spatial sites and structural support for the uniform loading of Fe3O4 nanoparticles. Measurements of water contact angle, thermogravimetric analysis (TGA), and mechanical properties showed that incorporating Fe3O4/PC composites significantly enhanced the water resistance, thermal stability, and mechanical performance of the PC-FWPU films. At an optimal Fe3O4/PC loading of 4.0 wt%, the PC-FWPU composite film exhibited a water contact angle of 134.6°, demonstrating excellent hydrophobicity. The temperature at which 50% weight loss occurs (T50%) increased markedly from 298.1℃ for pure waterborne polyurethane (WPU) to 388.7℃, reflecting a 30.4% enhancement. Concurrently, the tensile strength rose from 17.32 MPa to 30.97 MPa, a significant increase of 78.8%. Additionally, the introduction of Fe3O4/PC imparted certain magnetic and electrical conductive properties to the WPU matrix. The PC-FWPU composite film achieved a maximum saturation magnetization of 1.36 emu/g and an electrical conductivity of 3.6 × 10⁻⁶ S/cm. These findings lay the groundwork for applying these composites in advanced fields such as smart materials.