Scholarlink

<p>Integrating bio-based polymers with synthetic materials provides a novel approach to developing functional materials with enhanced properties. In this study, chitosan (CS)-based nanocomposites were synthesized using poly(pentafluorophenyl)methyl-2-methylprop-2-enoate (PPFOEMA) as the polymer blend, reinforced with silver-graphene oxide (Ag-GO NP) nanoparticles at different weight ratios (3%, 5%, and 7%). The nanocomposites were prepared via an in situ hydrothermal method, and their dielectric, electrical, and surface properties were systematically investigated. FTIR, SEM, and X-XRD analyses confirmed the successful formation of the nanocomposites, with Ag-GO nanoparticles homogenously dispersed in the CS-PPFOEMA blend. The dielectric constant (ε’) at 1000&#xa0;Hz increased with Ag-GO NP content, reaching 5.92 for the 5% Ag-GO nanocomposite compared to 4.09 for the 3% Ag-GO NP sample. The alternating current conductivity (σac) exhibited a significant increase, reaching 1.13 × 10⁻⁸ S/cm for the 7% Ag-GO sample at 1000&#xa0;Hz while rising to ~ 10⁻⁵ S/cm at 1&#xa0;MHz, indicating enhanced charge transport capabilities. Impedance (Z) values decreased with increasing frequency, and the nanocomposite containing 7% Ag-GO exhibited the lowest impedance, confirming its superior electrical conductivity. The contact angle measurements revealed that the water contact angle increased from 64.01° (3% Ag-GO) to 68.81° (7% Ag-GO), indicating increased hydrophobicity, while diiodomethane contact angles decreased from 29.35° to 25.90°, confirming enhanced oleophilicity. The surface free energy (SFE) correspondingly decreased from 49.459 mN/m to 48.715 mN/m, making these materials suitable for oil-water separation applications. These findings demonstrate that CS-PPFOEMA/Ag-GO nanocomposites exhibit improved dielectric, electrical, and surface properties, making them promising candidates for energy storage systems, flexible electronics, biomedical coatings, and self-cleaning surfaces.</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

Enhanced dielectric and surface properties of chitosan-based nanocomposites reinforced with Ag-GO nanoparticles

  • 期刊论文

  • 发表日期：

    2025年12月10日

查看全文
  • İbrahim Erol,
  • Gofur Khamidov

摘要

Integrating bio-based polymers with synthetic materials provides a novel approach to developing functional materials with enhanced properties. In this study, chitosan (CS)-based nanocomposites were synthesized using poly(pentafluorophenyl)methyl-2-methylprop-2-enoate (PPFOEMA) as the polymer blend, reinforced with silver-graphene oxide (Ag-GO NP) nanoparticles at different weight ratios (3%, 5%, and 7%). The nanocomposites were prepared via an in situ hydrothermal method, and their dielectric, electrical, and surface properties were systematically investigated. FTIR, SEM, and X-XRD analyses confirmed the successful formation of the nanocomposites, with Ag-GO nanoparticles homogenously dispersed in the CS-PPFOEMA blend. The dielectric constant (ε’) at 1000 Hz increased with Ag-GO NP content, reaching 5.92 for the 5% Ag-GO nanocomposite compared to 4.09 for the 3% Ag-GO NP sample. The alternating current conductivity (σac) exhibited a significant increase, reaching 1.13 × 10⁻⁸ S/cm for the 7% Ag-GO sample at 1000 Hz while rising to ~ 10⁻⁵ S/cm at 1 MHz, indicating enhanced charge transport capabilities. Impedance (Z) values decreased with increasing frequency, and the nanocomposite containing 7% Ag-GO exhibited the lowest impedance, confirming its superior electrical conductivity. The contact angle measurements revealed that the water contact angle increased from 64.01° (3% Ag-GO) to 68.81° (7% Ag-GO), indicating increased hydrophobicity, while diiodomethane contact angles decreased from 29.35° to 25.90°, confirming enhanced oleophilicity. The surface free energy (SFE) correspondingly decreased from 49.459 mN/m to 48.715 mN/m, making these materials suitable for oil-water separation applications. These findings demonstrate that CS-PPFOEMA/Ag-GO nanocomposites exhibit improved dielectric, electrical, and surface properties, making them promising candidates for energy storage systems, flexible electronics, biomedical coatings, and self-cleaning surfaces.