Effect of graphene oxides on the mechanical, thermal, and structural properties of epoxy nanocomposites

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-10-12 DOI:10.1016/j.diamond.2025.112937

Djihed Rezzig , Saad Abdeslam , Wolfgang Verestek , Johannes Roth , Siegfried Schmauder , Mostapha Tarfaoui

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Abstract

This research reports the fabrication of epoxy nanocomposites reinforced with graphene oxide (GO) synthesized via an electrochemical exfoliation method. Epoxy/GO nanocomposites containing 0.5, 1, 2.5, 5, and 10 wt% GO were prepared using a three-roll mill instrument, and their structural, thermal, and local mechanical properties were systematically investigated. Comprehensive characterization included scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, indentation testing, and cyclic indentation testing. The results show that at 2.5 wt% GO, the elastic modulus and hardness increased by approximately 7.4 % and 18 %, respectively, compared to neat epoxy. The glass transition temperature also increased by 24–28 %, depending on GO content. TGA analysis revealed that the residual weight at 800 °C increased from 17.13 wt% for neat epoxy to 26.50 wt% at 10 wt% GO, indicating a ∼ 55 % improvement in char yield and enhanced thermal stability due to the barrier effect of electrochemically exfoliated GO. Cyclic indentation testing further confirmed that 2.5 wt% GO provides optimal performance, offering improved elastic modulus, hardness, and resistance to cyclic loading. These findings highlight the potential of electrochemically exfoliated GO/epoxy nanocomposites for applications in aerospace, automotive, and advanced electronic devices.

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氧化石墨烯对环氧纳米复合材料力学、热学和结构性能的影响

本研究报道了用电化学剥离法合成氧化石墨烯增强环氧纳米复合材料的制备。采用三辊磨法制备了含有0.5、1、2.5、5和10 wt%氧化石墨烯的环氧/氧化石墨烯纳米复合材料，并对其结构、热性能和局部力学性能进行了系统研究。综合表征包括扫描电子显微镜、热重分析、差示扫描量热法、压痕测试和循环压痕测试。结果表明，当氧化石墨烯含量为2.5 wt%时，与纯环氧树脂相比，弹性模量和硬度分别提高了约7.4%和18%。根据氧化石墨烯含量的不同，玻璃化转变温度也提高了24 - 28%。TGA分析显示，800°C时的残余重量从纯环氧树脂的17.13 wt%增加到10 wt%氧化石墨烯的26.50 wt%，表明由于电化学剥离氧化石墨烯的屏障作用，炭产率提高了~ 55%，热稳定性增强。循环压痕测试进一步证实，2.5 wt%氧化石墨烯具有最佳性能，提高了弹性模量、硬度和抗循环载荷能力。这些发现突出了电化学剥离氧化石墨烯/环氧纳米复合材料在航空航天、汽车和先进电子设备中的应用潜力。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.