Scholarlink

<p>Nanocomposite materials have garnered significant attention in recent years due to their potential to enhance mechanical properties. This study investigates a novel mixing technique that simultaneously combines the influence of a small-scale Helmholtz Coil magnetic field and a high-shear turbomixer for the effective dispersion and distribution of iron oxide (Fe<sub>3</sub>O<sub>4</sub>) and graphene oxide (GO) within an epoxy resin. The preparation of these nanocomposites was systematically conducted using a full factorial design method, allowing for a comprehensive examination of the effect of varying concentrations of GO (0.3, 0.5, and 0.7 wt%) and Fe<sub>3</sub>O<sub>4</sub> (2, 5, and 8 wt%) nanoparticles on the tensile properties.To assess the distribution quality of Fe<sub>3</sub>O<sub>4</sub>/GO within the nanocomposite matrix, X-ray diffractometry (XRD) and scanning electron microscopy (SEM) were employed.Moreover, electromagnetic wave shielding properties have been evaluatedusinga vector network analyzer (VNA). The results indicated that the application of a magnetic field during mixing led to significant improvements in mechanical properties: specifically, there was a&#xa0;32.5% increase&#xa0;in tensile strength (reaching&#xa0;87.08&#xa0;MPa), a&#xa0;94.1% increase&#xa0;in toughness (at&#xa0;1.98&#xa0;J/m<sup>3</sup>), and a&#xa0;45.8% increase&#xa0;in elongation (to&#xa0;4.549%). However, a slight decrease of&#xa0;2.2%&#xa0;in tensile modulus was observed compared to pure epoxy, measuring&#xa0;2058.6&#xa0;MPa. As a novel idea,the better dispersion of GO nanoparticles may be achieved by first applying an external magnetic field to orient the Fe<sub>3</sub>O<sub>4</sub> (magnetic nanoparticles), then the Fe<sub>3</sub>O<sub>4</sub> would help align and disperse the GO (non-magnetic nanoparticles) through secondary forces between Fe<sub>3</sub>O<sub>4</sub> metallic-surface and GO functional-groups. </p> Graphical Abstract <p></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

Effect of small-scale helmholtz coil magnetic field and high-shear mixing on Fe3O4/GO nanoparticle distribution in epoxy: shielding-mechanical properties

  • 期刊论文

  • 发表日期：

    2025年6月27日

查看全文
  • Mohsen Ghiasvand,
  • Hamid Fazeli,
  • Jafar Eskandari Jam,
  • Abbas Kebritchi

摘要

Nanocomposite materials have garnered significant attention in recent years due to their potential to enhance mechanical properties. This study investigates a novel mixing technique that simultaneously combines the influence of a small-scale Helmholtz Coil magnetic field and a high-shear turbomixer for the effective dispersion and distribution of iron oxide (Fe3O4) and graphene oxide (GO) within an epoxy resin. The preparation of these nanocomposites was systematically conducted using a full factorial design method, allowing for a comprehensive examination of the effect of varying concentrations of GO (0.3, 0.5, and 0.7 wt%) and Fe3O4 (2, 5, and 8 wt%) nanoparticles on the tensile properties.To assess the distribution quality of Fe3O4/GO within the nanocomposite matrix, X-ray diffractometry (XRD) and scanning electron microscopy (SEM) were employed.Moreover, electromagnetic wave shielding properties have been evaluatedusinga vector network analyzer (VNA). The results indicated that the application of a magnetic field during mixing led to significant improvements in mechanical properties: specifically, there was a 32.5% increase in tensile strength (reaching 87.08 MPa), a 94.1% increase in toughness (at 1.98 J/m3), and a 45.8% increase in elongation (to 4.549%). However, a slight decrease of 2.2% in tensile modulus was observed compared to pure epoxy, measuring 2058.6 MPa. As a novel idea,the better dispersion of GO nanoparticles may be achieved by first applying an external magnetic field to orient the Fe3O4 (magnetic nanoparticles), then the Fe3O4 would help align and disperse the GO (non-magnetic nanoparticles) through secondary forces between Fe3O4 metallic-surface and GO functional-groups.

Graphical Abstract