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<p>In this study, graphene oxide (GO) was synthesized via Hummer’s method and subsequently integrated into an epoxy resin (EP) matrix using two distinct dispersion approaches: ultrasonic and emulsification dispersion to develop high-performance GO/EP adhesives (GO/EP-AD). At GO loading of 2 wt%, the adhesives exhibited shear strength of 31.94&#xa0;MPa, demonstrating a 56% enhancement over pure EP. The storage modulus (<i>E′</i>) of the GO/EP composites (GO/EP-SH) prepared by emulsion dispersion reached 1.718 GPa, the glass transition temperature (<i>T</i><sub><i>g</i></sub>) is 127 ℃. Compared with that of ultrasonic dispersion, <i>T</i><sub><i>g</i></sub> has increased by 4 ℃. The tensile strength and elastic modulus of the GO/EP-SH were 58.92&#xa0;MPa and 1.92 GPa, respectively. Compared with the initial EP matrix, the tensile strength and elastic modulus increased by 73% and 140%. Meanwhile, the impact strength has increased to 8.27&#xa0;kJ/m<sup>2</sup>. The above experimental results confirm that the introduction of GO can effectively construct a three-dimensional reinforcing network and simultaneously improve the thermal stability and mechanical properties of the EP matrix because of the interface strengthening mechanism.</p>

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Study on preparation and mechanical properties for graphene oxide/epoxy resins adhesives

  • 期刊论文

  • 发表日期：

    2025年8月15日

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  • Xueyue Lyu,
  • Baozheng Cui,
  • Xinjia Yang,
  • Dongyu Zhao

摘要

In this study, graphene oxide (GO) was synthesized via Hummer’s method and subsequently integrated into an epoxy resin (EP) matrix using two distinct dispersion approaches: ultrasonic and emulsification dispersion to develop high-performance GO/EP adhesives (GO/EP-AD). At GO loading of 2 wt%, the adhesives exhibited shear strength of 31.94 MPa, demonstrating a 56% enhancement over pure EP. The storage modulus (E′) of the GO/EP composites (GO/EP-SH) prepared by emulsion dispersion reached 1.718 GPa, the glass transition temperature (Tg) is 127 ℃. Compared with that of ultrasonic dispersion, Tg has increased by 4 ℃. The tensile strength and elastic modulus of the GO/EP-SH were 58.92 MPa and 1.92 GPa, respectively. Compared with the initial EP matrix, the tensile strength and elastic modulus increased by 73% and 140%. Meanwhile, the impact strength has increased to 8.27 kJ/m2. The above experimental results confirm that the introduction of GO can effectively construct a three-dimensional reinforcing network and simultaneously improve the thermal stability and mechanical properties of the EP matrix because of the interface strengthening mechanism.