Development of cement nanocomposites reinforced by carbon nanotube dispersion using superplasticizers

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY Carbon Letters Pub Date : 2024-03-18 DOI:10.1007/s42823-024-00714-4

Seok Hwan An, Ki Yun Kim, Chul Woo Chung, Jea Uk Lee

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Abstract

This paper explores the potential application of carbon nanotubes (CNTs) in the construction industry, as CNTs can effectively serve as nano-fillers, bridging the voids and holes in cement structures. However, the limited dispersibility of CNTs in water necessitates the use of dispersing agents for achieving uniform dispersion. In this study, two kinds of cement superplasticizers, polycarboxylate ether (PCE) and sulfonated naphthalene formaldehyde (SNF) were employed as dispersing agents to improve the interfacial affinity between CNTs and cement, and to enhance the strength of the cement nanocomposites. Contact angle experiments revealed that the utilization of PCE and SNF effectively addressed the interface issues between CNTs and cement. As a result, the cement nanocomposite with a CNT to PCE ratio of 1:2 exhibited an approximately 6.6% increase in compressive strength (73.05 MPa), while the CNT:SNF 1:2 cement composite showed a 4.7% increase (71.72 MPa) compared to plain cement (68.52 MPa). In addition, the rate of crack generation in cement nanocomposites with CNTs and dispersing agents was found to be slower than that of plain cement. The resulting cement nanocomposites, characterized by enhanced strength and durability, can be utilized as safer materials in the construction industry.

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利用超塑化剂开发碳纳米管分散体增强的水泥纳米复合材料

本文探讨了碳纳米管（CNTs）在建筑行业的潜在应用，因为碳纳米管可以有效地充当纳米填料，弥合水泥结构中的空隙和孔洞。然而，由于碳纳米管在水中的分散性有限，因此必须使用分散剂才能实现均匀分散。本研究采用聚羧酸醚（PCE）和磺化萘甲醛（SNF）两种水泥超塑化剂作为分散剂，以改善 CNT 与水泥之间的界面亲和力，提高水泥纳米复合材料的强度。接触角实验表明，使用 PCE 和 SNF 能有效解决 CNT 与水泥之间的界面问题。因此，与普通水泥（68.52 兆帕）相比，CNT 与 PCE 比率为 1:2 的水泥纳米复合材料的抗压强度（73.05 兆帕）提高了约 6.6%，而 CNT:SNF 比率为 1:2 的水泥复合材料的抗压强度（71.72 兆帕）提高了 4.7%。此外，还发现含有 CNT 和分散剂的水泥纳米复合材料的裂缝产生速度比普通水泥慢。由此产生的水泥纳米复合材料具有更高的强度和耐久性，可作为更安全的材料用于建筑行业。

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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.