Preparation and Smart Properties of Carboxylated Carbon Nanotube Reinforced Cement-Based Composites

Xinhui Jiang; Jiahui Luo; Xiaochen Su; Wenping Li; Dehui Song; Lin Wei

doi:10.54097/qg2q6w35

Authors

Xinhui Jiang
Jiahui Luo
Xiaochen Su
Wenping Li
Dehui Song
Lin Wei

DOI:

https://doi.org/10.54097/qg2q6w35

Keywords:

Electrical Resistivity, Piezoresistance, Cement-based Composites, Carbon Nanotubes

Abstract

This study investigated the influence of the outer diameter of carboxylated carbon nanotubes (CNTs)on the electrical conductivity and piezoresistive characteristics of cement-based composites. Specimens incorporating CNTs of varying outer diameters were prepared using ultrasonic dispersion technology. Under a constant pressure of 10 MPa, the relationship curve between CNT outer diameter and the rate of resistivity variation was analyzed, revealing that the composite's state governs its piezoresistive response characteristics. The experimental results demonstrate that the outer diameter of the CNTs significantly affects the stability of both the electrical resistance and the piezoresistive performance of the composites. When the CNT outer diameter falls within the range of 25-35 nm, the material exhibits optimal comprehensive performance, achieving both a stable conductive network and high-sensitivity piezoresistive response simultaneously.

Downloads

Download data is not yet available.

References

[1] Peng Jia, Wang Fei, Wang Yan. Study on Electrothermal Properties of Steel Scrap Conductive Cement Bricks[J]. Concrete World, 2023, (07): 40-43.

[2] Jiang Yongsheng. Study on Thermal and Load Sensitivity of Carbon Fiber-Nano Carbon Black Composite Cement-Based Materials[D]. Guilin University of Technology, 2024. DOI: 10.27050/d.cnki.gglgc.2024.000065.

[3] Guo Miaocai, Zhao Dafang, Lu Haijun. Mechanical, Electrical Conductive and Lightning Strike Performances of Carbon Nanotube/Graphene Hybrid Carbon Fiber Fabric Composites [J]. Acta Materiae Compositae Sinica, 2025, 42(08): 4487-4498. DOI: 10.13801/j.cnki.fhclxb.20241113.001.

[4] Lou Xiaoqiang, Gao Jianke, He Jianguo, et al. Characterization of Pore Structure of Cement-Based Materials Modified by Graphene and Carbon Nanotubes[J]. Journal of Materials Science and Engineering, 2025, 43(03): 477-485. DOI: 10. 14136/ j.cnki.issn1673-2812.2025.03.019.

[5] Zhao Weidong. Study on Modification of Carbon Nanotubes and Properties of Their Composite Materials[D]. Jilin University, 2009.

[6] Jia Hui, Jin Xin, Wei Haoguang, et al. Carboxyl Functionalization of Carbon Nanotubes and Its Influence on Cement Paste[J]. Drilling Fluid & Completion Fluid, 2024, 41 (05): 640-645.

[7] Zhu Zhongbo. Preparation and Corrosion Resistance Study of Epoxy Resin-Carbon Nanotube Composite Superhydrophobic Coatings[D]. University of Science and Technology Liaoning, 2023. DOI: 10.26923/d.cnki.gasgc.2023.000275.

[8] Li Lixiang, Li Feng. Effects of Surface Functional Groups (Carbonyl, Carboxyl, and Hydroxyl) on the Capacitance of Carbon Nanotubes[J]. New Carbon Materials, 2011, 26(03): 224-228.

[9] Lu Yang, Ji Hanqi, Fang Yi, et al. Highly Sensitive Conductive Cement Composites Using Fly Ash@MWCNTs Core-Shell Heterojunctions[J]. School of Civil and Transportation Engineering, Hohai University, Nanjing 210098; 10. 1016/ J. CONBUILDMAT.2025.142342.

[10] Zhao Jingwei. Study on Mechanical and Electrical Properties of Cement Mortar Reinforced by Graphene and Carbon Nanotubes [D]. Shenyang University of Technology, 2024. DOI: 10.27322/d.cnki.gsgyu.2024.000645.