Investigation of Graphene Derivatives on Electrical Properties of Alkali Activated Slag Composites
| Autor: | Xuanhan Zhang, Tao-Hua Ye, Biqin Dong, Yuan Fang, Wu-Jian Long, Jing Xie |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Thixotropy
Technology Materials science Oxide Dielectric reduced graphene oxide Article law.invention Viscosity chemistry.chemical_compound Rheology Electrical resistivity and conductivity law General Materials Science Composite material Microscopy QC120-168.85 Graphene QH201-278.5 Engineering (General). Civil engineering (General) TK1-9971 Compressive strength chemistry Descriptive and experimental mechanics alkali activated slag composite electrical properties graphene oxide rheology Electrical engineering. Electronics. Nuclear engineering TA1-2040 |
| Zdroj: | Materials Volume 14 Issue 16 Materials, Vol 14, Iss 4374, p 4374 (2021) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma14164374 |
| Popis: | Reduced graphene oxide (rGO) has been widely used to modify the mechanical performance of alkali activated slag composites (AASC) however, the mechanism is still unclear and the electrical properties of rGO reinforced AASC are unknown. Here, the rheological, mechanical, and electrical properties of the AASC containing rGO nanosheets (0, 0.1, 0.2, and 0.3 wt.%) are investigated. Results showed that rGO nanosheets addition can significantly improve the yield stress, plastic viscosity, thixotropy, and compressive strength of the AASC. The addition of 0.3 wt.% rGO nanosheets increased the stress, viscosity, thixotropy, and strength by 186.77 times, 3.68 times, 15.15 times, and 21.02%, respectively. As for electrical properties, the impedance of the AASC increased when the rGO content was less than 0.2 wt.% but decreased with the increasing dosage. In contrast, the dielectric constant and electrical conductivity of the AASC containing rGO nanosheets decreased and then increased, which can be attributed to the abundant interlayer water and the increasing structural defects as the storage sites for charge carriers, respectively. In addition, the effect of graphene oxide (GO) on the AASC is also studied and the results indicated that the agglomeration of GO nanosheets largely inhibited the application of it in the AASC, even with a small dosage. |
| Databáze: | OpenAIRE |
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