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电化学阻抗作为研究石墨烯基水泥基纳米复合材料物理和力学性能的评估工具。

Electrochemical Impedance as an Assessment Tool for the Investigation of the Physical and Mechanical Properties of Graphene-Based Cementitious Nanocomposites.

作者信息

Tziviloglou Eirini, Metaxa Zoi S, Maistros George, Kourkoulis Stavros K, Karousos Dionysios S, Favvas Evangelos P, Alexopoulos Nikolaos D

机构信息

Research Unit of Advanced Materials, Department of Financial and Management Engineering, University of the Aegean, 82132 Chios, Greece.

Department of Chemistry, International Hellenic University, 65404 Kavala, Greece.

出版信息

Nanomaterials (Basel). 2023 Sep 27;13(19):2652. doi: 10.3390/nano13192652.

DOI:10.3390/nano13192652
PMID:37836293
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10574441/
Abstract

This investigation explores the potential of electrochemical impedance spectroscopy (EIS) in evaluating graphene-based cementitious nanocomposites, focusing on their physical and structural properties, i.e., electrical resistivity, porosity, and fracture toughness. EIS was employed to study cement mixtures with varying graphene nanoplatelet (xGnP) concentrations (0.05-0.40% per dry cement weight), whereas flexural tests assessed fracture toughness and porosimetry analyses investigated the structural characteristics. The research demonstrated that the electrical resistivity initially decreased with increasing xGnP content, leveling off at higher concentrations. The inclusion of xGnPs correlated with an increase in the total porosity of the cement mixtures, which was indicated by both EIS and porosimetry measurements. Finally, a linear correlation emerged between fracture toughness and electrical resistivity, contributing also to underscore the use of EIS as a potent non-destructive tool for evaluating the physical and mechanical properties of conductive nano-reinforced cementitious nanocomposites.

摘要

本研究探讨了电化学阻抗谱（EIS）在评估石墨烯基水泥基纳米复合材料方面的潜力，重点关注其物理和结构特性，即电阻率、孔隙率和断裂韧性。采用EIS研究了具有不同石墨烯纳米片（xGnP）浓度（每干水泥重量的0.05 - 0.40%）的水泥混合物，而弯曲试验评估了断裂韧性，孔隙率分析研究了结构特征。研究表明，电阻率最初随着xGnP含量的增加而降低，在较高浓度时趋于平稳。xGnP的加入与水泥混合物总孔隙率的增加相关，这在EIS和孔隙率测量中均有体现。最后，断裂韧性与电阻率之间出现了线性关系，这也有助于强调EIS作为评估导电纳米增强水泥基纳米复合材料物理和力学性能的有效无损工具的用途。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/0cddaaa6fd7d/nanomaterials-13-02652-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/bb4cd8296ec9/nanomaterials-13-02652-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/0fa3f4ac4cf0/nanomaterials-13-02652-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/690dd9a8f812/nanomaterials-13-02652-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/0cddaaa6fd7d/nanomaterials-13-02652-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/e094f8066895/nanomaterials-13-02652-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/3fd80f335662/nanomaterials-13-02652-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/3fe7fe637cfd/nanomaterials-13-02652-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/bb4cd8296ec9/nanomaterials-13-02652-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/0fa3f4ac4cf0/nanomaterials-13-02652-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/63533eee2bdc/nanomaterials-13-02652-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/53ad5725a6fd/nanomaterials-13-02652-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/690dd9a8f812/nanomaterials-13-02652-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10574441/0cddaaa6fd7d/nanomaterials-13-02652-g012.jpg

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