Surface functionalization of graphene oxide nano powder for enhancement of cement composites

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-04-17 DOI:10.1016/j.materresbull.2025.113502

Faris Matalkah , Yazan H. Akkam , Mohammaed A. Zaitoun

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Abstract

Applying graphene oxide in cement composites is a new alternative to enhance mechanical properties and durability characteristics. However, graphene oxide in cement may disrupt the hydration process, causing increased gaps between layers, weakening the structure, and reducing its overall strength. This study aims at customizing the properties of graphene oxide nanomaterials using surface modification, to facilitate their advantageous use in concrete applications. The adopted approach relies on surface modification by introducing ethylenediaminetetraacetic acid (EDTA) functional groups to improve interaction with the components of cement hydrates and enhance dispersion characteristics. Tailored graphene oxide was synthesized by a two-step process including surface activation using a hydrochloric acid (HCl) solution, followed by the insertion of EDTA. Subsequently, refined graphene oxide was incorporated into the mortar samples at varying concentrations of 0, 0.02, 0.04, and 0.06 % relative to the cement weight. The Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Thermal Analysis (TGA/DTA), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM) techniques were employed to gain a comprehensive understanding of the underlying mechanism. The results revealed that the incorporation of tailored graphene oxide with EDTA accelerates the cement hydration and improves the 7-day compressive strength by 20 % whereas the 28-day compressive strength was enhanced by 15 %.

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氧化石墨烯纳米粉体的表面功能化用于增强水泥复合材料的性能

在水泥复合材料中应用氧化石墨烯是提高机械性能和耐久性能的一种新选择。然而，水泥中的氧化石墨烯可能会破坏水化过程，导致层间间隙增大，削弱结构，降低整体强度。本研究旨在利用表面改性技术定制氧化石墨烯纳米材料的特性，以促进其在混凝土中的优势应用。采用的方法是通过引入乙二胺四乙酸（EDTA）官能团进行表面改性，以改善与水泥水合物成分的相互作用并提高分散特性。定制的氧化石墨烯通过两步法合成，包括使用盐酸（HCl）溶液进行表面活化，然后插入 EDTA。随后，将精制氧化石墨烯以相对于水泥重量 0%、0.02%、0.04% 和 0.06% 的不同浓度加入砂浆样品中。研究人员采用了傅立叶变换红外光谱（FTIR）、热重/热重分析（TGA/DTA）、X 射线衍射（XRD）和扫描电子显微镜（SEM）技术，以全面了解其基本机制。结果表明，掺入 EDTA 的定制氧化石墨烯可加速水泥水化，使 7 天抗压强度提高 20%，28 天抗压强度提高 15%。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.