MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties
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 excell...
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MDPI AG
2021-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/6/1450 |
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| author | Martina Záleská Milena Pavlíková Adam Pivák Šimon Marušiak Ondřej Jankovský Anna-Marie Lauermannová Michal Lojka Filip Antončík Zbyšek Pavlík |
| author_facet | Martina Záleská Milena Pavlíková Adam Pivák Šimon Marušiak Ondřej Jankovský Anna-Marie Lauermannová Michal Lojka Filip Antončík Zbyšek Pavlík |
| author_sort | Martina Záleská |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T13:11:11Z |
| format | Article |
| id | doaj.art-f8c4c73b8c934195ba40b03a4755d6ce |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T13:11:11Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-f8c4c73b8c934195ba40b03a4755d6ce2023-11-21T10:45:19ZengMDPI AGMaterials1996-19442021-03-01146145010.3390/ma14061450MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its PropertiesMartina Záleská0Milena Pavlíková1Adam Pivák2Šimon Marušiak3Ondřej Jankovský4Anna-Marie Lauermannová5Michal Lojka6Filip Antončík7Zbyšek Pavlík8Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech RepublicDepartment of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech RepublicDepartment of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech RepublicDepartment of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech RepublicDepartment of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech RepublicDepartment of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech RepublicDepartment of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech RepublicDepartment of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech RepublicDepartment of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech RepublicThe 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.https://www.mdpi.com/1996-1944/14/6/1450magnesium oxychloride cementgraphene nanoplateletsmixing methodstructural parametersmechanical properties |
| spellingShingle | Martina Záleská Milena Pavlíková Adam Pivák Šimon Marušiak Ondřej Jankovský Anna-Marie Lauermannová Michal Lojka Filip Antončík Zbyšek Pavlík MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties Materials magnesium oxychloride cement graphene nanoplatelets mixing method structural parameters mechanical properties |
| title | MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties |
| title_full | MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties |
| title_fullStr | MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties |
| title_full_unstemmed | MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties |
| title_short | MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties |
| title_sort | moc doped with graphene nanoplatelets the influence of the mixture preparation technology on its properties |
| topic | magnesium oxychloride cement graphene nanoplatelets mixing method structural parameters mechanical properties |
| url | https://www.mdpi.com/1996-1944/14/6/1450 |
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