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Article

Facile Synthesis of Graphene from Waste Tire/Silica Hybrid Additives and Optimization Study for the Fabrication of Thermally Enhanced Cement Grouts

1
Sabanci University Integrated Manufacturing Technologies Research and Application Center & Composite Technologies Center of Excellence, Teknopark Istanbul, 34906 Pendik, Istanbul, Turkey
2
RISE Research Institutes of Sweden, Division Samhällsbyggnad–RISE CBI Betonginstitutet, Drottning Kristinas väg 26, 114 28 Stockholm, Sweden
3
Cimsa Cimento Sanayi A. S., Toroslar Mah. Tekke Cad., 33013 Yenitaskent, Mersin, Turkey
4
Faculty of Engineering and Natural Sciences, Sabanci University, Orhanli, 34956 Tuzla, Istanbul, Turkey
*
Author to whom correspondence should be addressed.
Academic Editors: Dimitrios Bikiaris and Dimitrios G. Papageorgiou
Molecules 2020, 25(4), 886; https://doi.org/10.3390/molecules25040886
Received: 10 December 2019 / Revised: 3 January 2020 / Accepted: 5 January 2020 / Published: 17 February 2020
(This article belongs to the Special Issue Polymer Composites and Nanocomposites with Enhanched Properties)
This work evaluates the effects of newly designed graphene/silica hybrid additives on the properties of cementitious grout. In the hybrid structure, graphene nanoplatelet (GNP) obtained from waste tire was used to improve the thermal conductivity and reduce the cost and environmental impacts by using recyclable sources. Additionally, functionalized silica nanoparticles were utilized to enhance the dispersion and solubility of carbon material and thus the hydrolyzable groups of silane coupling agent were attached to the silica surface. Then, the hybridization of GNP and functionalized silica was conducted to make proper bridges and develop hybrid structures by tailoring carbon/silica ratios. Afterwards, special grout formulations were studied by incorporating these hybrid additives at different loadings. As the amount of hybrid additive incorporated into grout suspension increased from 3 to 5 wt%, water uptake increased from 660 to 725 g resulting in the reduction of thermal conductivity by 20.6%. On the other hand, as the concentration of GNP in hybrid structure increased, water demand was reduced, and thus the enhancement in thermal conductivity was improved by approximately 29% at the same loading ratios of hybrids in the prepared grout mixes. Therefore, these developed hybrid additives showed noticeable potential as a thermal enhancement material in cement-based grouts. View Full-Text
Keywords: graphene nanoplatelet; waste tire; silanization; hybridization; thermal conductivity; grouts graphene nanoplatelet; waste tire; silanization; hybridization; thermal conductivity; grouts
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MDPI and ACS Style

Berktas, I.; Ghafar, A.N.; Fontana, P.; Caputcu, A.; Menceloglu, Y.; Okan, B.S. Facile Synthesis of Graphene from Waste Tire/Silica Hybrid Additives and Optimization Study for the Fabrication of Thermally Enhanced Cement Grouts. Molecules 2020, 25, 886. https://doi.org/10.3390/molecules25040886

AMA Style

Berktas I, Ghafar AN, Fontana P, Caputcu A, Menceloglu Y, Okan BS. Facile Synthesis of Graphene from Waste Tire/Silica Hybrid Additives and Optimization Study for the Fabrication of Thermally Enhanced Cement Grouts. Molecules. 2020; 25(4):886. https://doi.org/10.3390/molecules25040886

Chicago/Turabian Style

Berktas, Ilayda; Ghafar, Ali N.; Fontana, Patrick; Caputcu, Ayten; Menceloglu, Yusuf; Okan, Burcu S. 2020. "Facile Synthesis of Graphene from Waste Tire/Silica Hybrid Additives and Optimization Study for the Fabrication of Thermally Enhanced Cement Grouts" Molecules 25, no. 4: 886. https://doi.org/10.3390/molecules25040886

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