Towards novel building materials: High-strength nanocomposites based on graphene, graphite oxide and magnesium oxychloride

Jankovský, Ondřej; Lojka, Michal; Lauermannová, Anna-Marie; Antončík, Filip; Pavlíková, Milena; Záleská, Martina; Pavlík, Zbyšek; Pivák, Adam; Sedmidubský, David

doi:10.1016/j.apmt.2020.100766

Cited by 27 publications

(11 citation statements)

References 66 publications

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“…Graphene was not visible because micrographs were obtained from the fracture surface. It was previously confirmed that graphene significantly improves the mechanical properties (flexural strength and compressive strength) [ 32 ]; therefore, the fracture occurred in areas with low graphene concentration.…”

Section: Resultsmentioning

confidence: 90%

“…The high-strength nanocomposites based on the MOC with the addition of graphene, graphite oxide, and a combination of both nanomaterials in the amount of 0.5 wt. % of binder were investigated [ 32 ]. To date, no study has been found to investigate the effect of MOC-graphene mixture preparation technology on the parameters of resulting composites.…”

Section: Introductionmentioning

confidence: 99%

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MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties

et al. 2021

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The ongoing tendency to create environmentally friendly building materials is nowadays connected with the use of reactive magnesia-based composites. The aim of the presented research was to develop an ecologically sustainable composite material based on MOC (magnesium oxychloride cement) with excellent mechanical, chemical, and physical properties. The effect of the preparation procedure of MOC pastes doped with graphene nanoplatelets on their fresh and hardened properties was researched. One-step and two-step homogenization techniques were proposed as prospective tools for the production of MOC-based composites of advanced parameters. The conducted experiments and analyses covered X-ray fluorescence, scanning electron microscopy, energy-dispersive spectroscopy, high-resolution transmission electron microscopy, sorption analysis, X-ray diffraction, and optical microscopy. The viscosity of the fresh mixtures was monitored using a rotational viscometer. For the hardened composites, macro- and micro-structural parameters were measured together with the mechanical parameters. These tests were performed after 7 days and 14 days. The use of a carbon-based nanoadditive led to a significant drop in porosity, thus densifying the MOC matrix. Accordingly, the mechanical resistance was greatly improved by graphene nanoplatelets. The two-step homogenization procedure positively affected all researched functional parameters of the developed composites (e.g., the compressive strength increase of approximately 54% after 7 days, and 37% after 14 days, respectively) and can be recommended for the preparation of advanced functional materials reinforced with graphene.

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Section: Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties

et al. 2021

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“…The composition of GO depends on the level of oxidation of the sample. Generally, graphene oxide is composed of carbon, oxygen, and hydrogen, but there are very often other impurities from the starting materials, such as sulfur, chlorine, nitrogen, manganese, and potassium [ 97 ]. Manganese and potassium are contaminants that remain from the starting reactants (potassium permanganate), and chlorine remains from hydrochloric acid that is usually used in order to wash away the contaminants.…”

Section: Typically Used Analytical Methods For Gomentioning

confidence: 99%

Synthesis and Applications of Graphene Oxide

et al. 2022

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Thanks to the unique properties of graphite oxides and graphene oxide (GO), this material has become one of the most promising materials that are widely studied. Graphene oxide is not only a precursor for the synthesis of thermally or chemically reduced graphene: researchers revealed a huge amount of unique optical, electronic, and chemical properties of graphene oxide for many different applications. In this review, we focus on the structure and characterization of GO, graphene derivatives prepared from GO and GO applications. We describe GO utilization in environmental applications, medical and biological applications, freestanding membranes, and various composite systems.

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“…Moreover, additives improving the specific properties of MOC can be used, where those improving the water resistance are mentioned above. Another approach is based on using nanoadditives, namely carbon-based nanoadditives, which improve the mechanical properties of MOC, as has been recently pointed out in the literature [30].…”

Section: Introductionmentioning

confidence: 99%

Magnesium Oxychloride Cement Composites with MWCNT for the Construction Applications

et al. 2021

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In this contribution, composite materials based on magnesium oxychloride cement (MOC) with multi-walled carbon nanotubes (MWCNTs) used as an additive were prepared and characterized. The prepared composites contained 0.5 and 1 wt.% of MWCNTs, and these samples were compared with the pure MOC Phase 5 reference. The composites were characterized using a broad spectrum of analytical methods to determine the phase and chemical composition, morphology, and thermal behavior. In addition, the basic structural parameters, pore size distribution, mechanical strength, stiffness, and hygrothermal performance of the composites, aged 14 days, were also the subject of investigation. The MWCNT-doped composites showed high compactness, increased mechanical resistance, stiffness, and water resistance, which is crucial for their application in the construction industry and their future use in the design and development of alternative building products.

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Towards novel building materials: High-strength nanocomposites based on graphene, graphite oxide and magnesium oxychloride

Cited by 27 publications

References 66 publications

MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties

MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties

Synthesis and Applications of Graphene Oxide

Magnesium Oxychloride Cement Composites with MWCNT for the Construction Applications

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