Effect of Dispersing Carbon Nanotube in Aqueous Solution by Poly-Carboxylic-Based Surfactants on Mechanical and Microstructural Properties as Cementitious Composites
The development of high-performance concrete using carbon nanotubes (CNTs), which is used in various industries owing to its excellent mechanical properties, has attracted much attention, leading to ongoing research in this area. However, when mixing CNTs into cement paste, there has been limited fo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/21/6880 |
| _version_ | 1797631682600239104 |
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| author | Won-Woo Kim Jae-Heum Moon Seung-Tae Lee |
| author_facet | Won-Woo Kim Jae-Heum Moon Seung-Tae Lee |
| author_sort | Won-Woo Kim |
| collection | DOAJ |
| description | The development of high-performance concrete using carbon nanotubes (CNTs), which is used in various industries owing to its excellent mechanical properties, has attracted much attention, leading to ongoing research in this area. However, when mixing CNTs into cement paste, there has been limited focus on the dispersibility, and, in most cases, aqueous dispersions of CNTs used in other industrial sectors are used. Because CNTs form the structures of bundles or aggregates owing to their high aspect ratio and van der Waals force between particles, the desired dispersibility cannot be obtained when mixing CNTs in powder form with other materials. Therefore, in this study, we examined the applicability of CNT aqueous dispersions using PC-based plasticizer used in concrete. Aqueous dispersions of CNT using PC-based surfactants are prepared and their properties are compared with those of a PVP-based aqueous dispersion. To analyze the mechanical properties, the compressive strength and flexural strength are measured on the 28th day. Then, the dispersibility and microstructure are analyzed using scanning electron microscopy image analysis, thermogravimetric analysis, and BET (Brunauer–Emmett–Teller) analysis. The analysis results show the enhancement of mechanical properties due to the mixing of the CNT dispersion, and the results confirm the applicability of the proposed CNT aqueous dispersions using PC-based surfactants. |
| first_indexed | 2024-03-11T11:26:47Z |
| format | Article |
| id | doaj.art-d7e946608fde47a3a83ec20aaefd3bc8 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T11:26:47Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-d7e946608fde47a3a83ec20aaefd3bc82023-11-10T15:07:12ZengMDPI AGMaterials1996-19442023-10-011621688010.3390/ma16216880Effect of Dispersing Carbon Nanotube in Aqueous Solution by Poly-Carboxylic-Based Surfactants on Mechanical and Microstructural Properties as Cementitious CompositesWon-Woo Kim0Jae-Heum Moon1Seung-Tae Lee2KICT (Korea Institute of Civil Engineering and Building Technology), Goyang-si 10223, Republic of KoreaKICT (Korea Institute of Civil Engineering and Building Technology), Goyang-si 10223, Republic of KoreaDepartment of Civil Engineering, Kunsan National University, Gunsan-si 54150, Republic of KoreaThe development of high-performance concrete using carbon nanotubes (CNTs), which is used in various industries owing to its excellent mechanical properties, has attracted much attention, leading to ongoing research in this area. However, when mixing CNTs into cement paste, there has been limited focus on the dispersibility, and, in most cases, aqueous dispersions of CNTs used in other industrial sectors are used. Because CNTs form the structures of bundles or aggregates owing to their high aspect ratio and van der Waals force between particles, the desired dispersibility cannot be obtained when mixing CNTs in powder form with other materials. Therefore, in this study, we examined the applicability of CNT aqueous dispersions using PC-based plasticizer used in concrete. Aqueous dispersions of CNT using PC-based surfactants are prepared and their properties are compared with those of a PVP-based aqueous dispersion. To analyze the mechanical properties, the compressive strength and flexural strength are measured on the 28th day. Then, the dispersibility and microstructure are analyzed using scanning electron microscopy image analysis, thermogravimetric analysis, and BET (Brunauer–Emmett–Teller) analysis. The analysis results show the enhancement of mechanical properties due to the mixing of the CNT dispersion, and the results confirm the applicability of the proposed CNT aqueous dispersions using PC-based surfactants.https://www.mdpi.com/1996-1944/16/21/6880CNTcarbon nanotubesurfactantcement compositemicrostructuremechanical properties |
| spellingShingle | Won-Woo Kim Jae-Heum Moon Seung-Tae Lee Effect of Dispersing Carbon Nanotube in Aqueous Solution by Poly-Carboxylic-Based Surfactants on Mechanical and Microstructural Properties as Cementitious Composites Materials CNT carbon nanotube surfactant cement composite microstructure mechanical properties |
| title | Effect of Dispersing Carbon Nanotube in Aqueous Solution by Poly-Carboxylic-Based Surfactants on Mechanical and Microstructural Properties as Cementitious Composites |
| title_full | Effect of Dispersing Carbon Nanotube in Aqueous Solution by Poly-Carboxylic-Based Surfactants on Mechanical and Microstructural Properties as Cementitious Composites |
| title_fullStr | Effect of Dispersing Carbon Nanotube in Aqueous Solution by Poly-Carboxylic-Based Surfactants on Mechanical and Microstructural Properties as Cementitious Composites |
| title_full_unstemmed | Effect of Dispersing Carbon Nanotube in Aqueous Solution by Poly-Carboxylic-Based Surfactants on Mechanical and Microstructural Properties as Cementitious Composites |
| title_short | Effect of Dispersing Carbon Nanotube in Aqueous Solution by Poly-Carboxylic-Based Surfactants on Mechanical and Microstructural Properties as Cementitious Composites |
| title_sort | effect of dispersing carbon nanotube in aqueous solution by poly carboxylic based surfactants on mechanical and microstructural properties as cementitious composites |
| topic | CNT carbon nanotube surfactant cement composite microstructure mechanical properties |
| url | https://www.mdpi.com/1996-1944/16/21/6880 |
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