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Optimization of Graphene Nanoplatelets Dispersion and Its Performance in Cement Mortars

التفاصيل البيبلوغرافية
العنوان: Optimization of Graphene Nanoplatelets Dispersion and Its Performance in Cement Mortars
المؤلفون: Yong Zhou, Yuliang Wang, Tianming Gao, Yifeng Ling, Nengdong Jiang, Abdullah M. Tawfek, Huaqiang Yuan
المصدر: Materials, Vol 15, Iss 20, p 7308 (2022)
بيانات النشر: MDPI AG, 2022.
سنة النشر: 2022
المجموعة: LCC:Technology
LCC:Electrical engineering. Electronics. Nuclear engineering
LCC:Engineering (General). Civil engineering (General)
LCC:Microscopy
LCC:Descriptive and experimental mechanics
مصطلحات موضوعية: graphene nanoplatelets, dispersion, surfactant, cement mortar, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85
الوصف: 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%.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1996-1944
Relation: https://www.mdpi.com/1996-1944/15/20/7308; https://doaj.org/toc/1996-1944
DOI: 10.3390/ma15207308
URL الوصول: https://doaj.org/article/e3fd6796abc04334b4bd13a2aa869c40
رقم الأكسشن: edsdoj.3fd6796abc04334b4bd13a2aa869c40
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:19961944
DOI:10.3390/ma15207308