Optimization of Graphene Nanoplatelets Dispersion and Its Performance in Cement Mortars
As promising next-generation conducting materials, Graphene Nanoplatelets (GNPs) have been widely used to enhance the mechanical and pressure-sensitive properties of cement-based materials. However, this beneficial effect highly depended on its dispersion. In this study, polyvinyl pyrrolidone (PVP)...
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MDPI AG
2022-10-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/20/7308 |
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| author | Yong Zhou Yuliang Wang Tianming Gao Yifeng Ling Nengdong Jiang Abdullah M. Tawfek Huaqiang Yuan |
| author_facet | Yong Zhou Yuliang Wang Tianming Gao Yifeng Ling Nengdong Jiang Abdullah M. Tawfek Huaqiang Yuan |
| author_sort | Yong Zhou |
| collection | DOAJ |
| description | As promising next-generation conducting materials, Graphene Nanoplatelets (GNPs) have been widely used to enhance the mechanical and pressure-sensitive properties of cement-based materials. However, this beneficial effect highly depended on its dispersion. In this study, polyvinyl pyrrolidone (PVP) surfactant, high-speed shear, and ultrasonication were used to disperse GNPs. To fully exert the mechanical and pressure-sensitive properties and enhance the dispersion effect of GNPs in cement-based materials, the dispersing method parameters, including PVP concentration, ultrasonication time, shear time, and rate, were optimized. The dispersion degree of GNPs was evaluated by absorbance. The results show that the optimal dispersion parameters were 10 mg/mL of PVP concentration, 15 min of ultrasonication time, 15 min of shear time, and 8000 revolutions per minute (rpm) of shear rate. In addition, the effect of GNPs dosage (0.05, 0.1, 0.3, 0.5, 0.7, and 1.0 wt%) on the setting time, flowability, and mechanical and pressure-sensitive properties of cement mortar were examined. Results reveal that the optimum dosage of GNPs was found at 1.0 wt%. |
| first_indexed | 2024-03-09T03:34:01Z |
| format | Article |
| id | doaj.art-e3fd6796abc04334b4bd13a2aa869c40 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T03:34:01Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e3fd6796abc04334b4bd13a2aa869c402023-12-03T14:51:28ZengMDPI AGMaterials1996-19442022-10-011520730810.3390/ma15207308Optimization of Graphene Nanoplatelets Dispersion and Its Performance in Cement MortarsYong Zhou0Yuliang Wang1Tianming Gao2Yifeng Ling3Nengdong Jiang4Abdullah M. Tawfek5Huaqiang Yuan6Shandong Hi-Speed Group Co., Ltd., Jinan 250002, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250002, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250002, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250002, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250002, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250002, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250002, ChinaAs promising next-generation conducting materials, Graphene Nanoplatelets (GNPs) have been widely used to enhance the mechanical and pressure-sensitive properties of cement-based materials. However, this beneficial effect highly depended on its dispersion. In this study, polyvinyl pyrrolidone (PVP) surfactant, high-speed shear, and ultrasonication were used to disperse GNPs. To fully exert the mechanical and pressure-sensitive properties and enhance the dispersion effect of GNPs in cement-based materials, the dispersing method parameters, including PVP concentration, ultrasonication time, shear time, and rate, were optimized. The dispersion degree of GNPs was evaluated by absorbance. The results show that the optimal dispersion parameters were 10 mg/mL of PVP concentration, 15 min of ultrasonication time, 15 min of shear time, and 8000 revolutions per minute (rpm) of shear rate. In addition, the effect of GNPs dosage (0.05, 0.1, 0.3, 0.5, 0.7, and 1.0 wt%) on the setting time, flowability, and mechanical and pressure-sensitive properties of cement mortar were examined. Results reveal that the optimum dosage of GNPs was found at 1.0 wt%.https://www.mdpi.com/1996-1944/15/20/7308graphene nanoplateletsdispersionsurfactantcement mortar |
| spellingShingle | Yong Zhou Yuliang Wang Tianming Gao Yifeng Ling Nengdong Jiang Abdullah M. Tawfek Huaqiang Yuan Optimization of Graphene Nanoplatelets Dispersion and Its Performance in Cement Mortars Materials graphene nanoplatelets dispersion surfactant cement mortar |
| title | Optimization of Graphene Nanoplatelets Dispersion and Its Performance in Cement Mortars |
| title_full | Optimization of Graphene Nanoplatelets Dispersion and Its Performance in Cement Mortars |
| title_fullStr | Optimization of Graphene Nanoplatelets Dispersion and Its Performance in Cement Mortars |
| title_full_unstemmed | Optimization of Graphene Nanoplatelets Dispersion and Its Performance in Cement Mortars |
| title_short | Optimization of Graphene Nanoplatelets Dispersion and Its Performance in Cement Mortars |
| title_sort | optimization of graphene nanoplatelets dispersion and its performance in cement mortars |
| topic | graphene nanoplatelets dispersion surfactant cement mortar |
| url | https://www.mdpi.com/1996-1944/15/20/7308 |
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