Dielectric and mechanical properties of cement pastes incorporated with magnetically aligned reduced graphene oxide

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2024-04-01 DOI:10.1016/j.dibe.2024.100471

Yuhang Yan , Lidan Tian , Wenbin Zhao , Samuel Aires Master Lazaro , Xiangyu Li , Shengwen Tang

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引用次数: 0

Abstract

Magnetic nanocomposites were fabricated by attaching surface-modified magnetite nanoparticles to the surface of reduced graphene oxide (rGO) in this study. By applying an external magnetic field, the rGO were highly aligned in the cement paste. The orientation factor of aligned rGO was found to be 0.71 by analyzing the polarized Raman scattering spectra. The alignment of the rGO contributed to both the mechanical and dielectric properties of the cement paste. The flexural strength of the specimen with aligned rGO improved by 48% compared with that of the cement pastes with randomly distributed rGO. The dielectric constant at 100 Hz of the specimen with aligned rGO was increased by 271% compared with that of cement pastes with randomly distributed rGO. A modified rule of mixtures was proposed to predict their mechanical and dielectric properties. This study offers insight on the development of nanofiller-incorporated cement-based materials with enhanced mechanical and dielectric properties.

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掺入磁性排列还原氧化石墨烯的水泥浆的介电性能和机械性能

本研究通过在还原氧化石墨烯（rGO）表面附着表面改性的磁铁矿纳米颗粒，制备了磁性纳米复合材料。通过施加外部磁场，rGO 在水泥浆中高度排列。通过分析偏振拉曼散射光谱，发现对齐的 rGO 的取向因子为 0.71。rGO 的排列有助于提高水泥浆的机械性能和介电性能。与随机分布 rGO 的水泥浆相比，排列整齐的 rGO 试样的抗折强度提高了 48%。与随机分布 rGO 的水泥浆相比，排列了 rGO 的试样在 100 Hz 时的介电常数提高了 271%。研究人员提出了一种修正的混合物规则，用于预测其机械性能和介电性能。这项研究为开发具有更高的机械和介电性能的纳米填料掺合水泥基材料提供了启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.