Investigation of freeze–thaw deterioration effects on electrical properties and electric-heating capability of CNT-CF incorporated cement mortar

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2024-05-02 DOI:10.1007/s42823-024-00738-w

H. N. Yoon, Won-Taek Hong, Jongwon Jung, Chiyoung Park, Daeik Jang, Beomjoo Yang

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Abstract

The present study investigates the impact of freeze–thaw deterioration on the electrical properties and electric-heating capabilities of cement mortar incorporating with carbon nanotubes (CNT) and carbon fibers (CF). Mortar samples, containing 0.5 wt.% CNT and 0.1 wt.% CF relative to the mass of cement, were prepared and subjected to freeze–thaw tests for up to 300 cycles. The electrical properties and electric-heating capability were evaluated every 30 freeze–thaw cycles, and the physicochemical characteristics of the samples were analyzed using X-ray diffraction and mercury intrusion porosimetry. The results indicate a decline in both electrical conductivity and heat-generation capability as the freeze–thaw cycles progress. Furthermore, changes in the pore structure of the mortar samples during the freeze–thaw cycles contributed to damage in the conductive network formed by CNT and CF, resulting in decreased electrical conductivity and heat-generation capabilities of the mortar samples.

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冻融劣化对掺入 CNT-CF 的水泥砂浆电气性能和电热能力的影响研究

本研究探讨了冻融劣化对掺有碳纳米管（CNT）和碳纤维（CF）的水泥砂浆的电气性能和电热能力的影响。制备了相对于水泥质量含有 0.5 wt.% CNT 和 0.1 wt.% CF 的砂浆样品，并对其进行了多达 300 次的冻融试验。每 30 次冻融循环评估一次电气性能和电热能力，并使用 X 射线衍射和汞侵入孔隙比色法分析样品的理化特性。结果表明，随着冻融循环的进行，导电性和发热能力都在下降。此外，冻融循环过程中砂浆样品孔隙结构的变化导致了由 CNT 和 CF 形成的导电网络的破坏，从而导致砂浆样品的导电性和发热能力下降。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.