scholarly journals Influence of releasing graphene oxide into a clayey sand: physical and mechanical properties

RSC Advances ◽  
2017 ◽  
Vol 7 (29) ◽  
pp. 18060-18067 ◽  
Author(s):  
Guo-Xiang Zhou ◽  
Jing Zhong ◽  
Heng Zhang ◽  
Xinhua Hu ◽  
Jianlin Wu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Natural Environment ◽  
Physical And Mechanical Properties ◽  
Clayey Sand

Graphene oxide (GO) is increasingly used in various applications, and the implications of this nano-sized material entering the natural environment are of great interest.

scholarly journals Influence of the Soil Genesis on Physical and Mechanical Properties

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Marian Marschalko ◽  
Işık Yilmaz ◽  
Lucie Fojtová ◽  
Karel Kubečka ◽  
Tomáš Bouchal ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Sandy Loam ◽  
Physical And Mechanical Properties ◽  
Geological Structure ◽  
Point Of View ◽  
Clayey Sand ◽  
Soil Genesis ◽  
Foundation Soil ◽  
Genetic Types ◽  
Geotechnical Investigations

The paper deals with the influence of soil genesis on the physical-mechanical properties. The presented case study was conducted in the region of the Ostrava Basin where there is a varied genetic composition of the Quaternary geological structure on the underlying Neogeneous sediments which are sediments of analogous granulometry but different genesis. In this study, 7827 soil samples of an eolian, fluvial, glacial, and deluvial origin and their laboratory analyses results were used. The study identified different values in certain cases, mostly in coarser-grained foundation soils, such as sandy loam S4 (MS) and clayey sand F4 (CS). The soils of the fluvial origin manifest different values than other genetic types. Next, based on regression analyses, dependence was proved neither on the deposition depth (depth of samples) nor from the point of view of the individual foundation soil classes or the genetic types. The contribution of the paper is to point at the influence of genesis on the foundation soil properties so that engineering geologists and geotechnicians pay more attention to the genesis during engineering-geological and geotechnical investigations.

scholarly journals Acrylic Bone Cements Modified with Graphene Oxide: Mechanical, Physical, and Antibacterial Properties

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1773 ◽  
Author(s):  
Mayra Eliana Valencia Zapata ◽  
Lina Marcela Ruiz Rojas ◽  
José Herminsul Mina Hernández ◽  
Johannes Delgado-Ospina ◽  
Carlos David Grande Tovar
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Bacterial Infections ◽  
Setting Time ◽  
Antibacterial Properties ◽  
Physical And Mechanical Properties ◽  
Maximum Temperature ◽  
Bone Cements ◽  
Gram Negative ◽  
Total Joint Replacements

Bacterial infections are a common complication after total joint replacements (TJRs), the treatment of which is usually based on the application of antibiotic-loaded cements; however, owing to the increase in antibiotic-resistant microorganisms, the possibility of studying new antibacterial agents in acrylic bone cements (ABCs) is open. In this study, the antibacterial effect of formulations of ABCs loaded with graphene oxide (GO) between 0 and 0.5 wt.% was evaluated against Gram-positive bacteria: Bacillus cereus and Staphylococcus aureus, and Gram-negative ones: Salmonella enterica and Escherichia coli. It was found that the effect of GO was dependent on the concentration and type of bacteria: GO loadings ≥0.2 wt.% presented total inhibition of Gram-negative bacteria, while GO loadings ≥0.3 wt.% was necessary to achieve the same effect with Gram-positives bacteria. Additionally, the evaluation of some physical and mechanical properties showed that the presence of GO in cement formulations increased wettability by 17%, reduced maximum temperature during polymerization by 19%, increased setting time by 40%, and increased compressive and flexural mechanical properties by up to 17%, all of which are desirable behaviors in ABCs. The formulation of ABC loading with 0.3 wt.% GO showed great potential for use as a bone cement with antibacterial properties.

scholarly journals Carbon nanomaterials enhanced cement-based composites: advances and challenges

2020 ◽  
Vol 9 (1) ◽  
pp. 115-135 ◽  
Author(s):  
Mingrui Du ◽  
Hongwen Jing ◽  
Yuan Gao ◽  
Haijian Su ◽  
Hongyuan Fang
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Graphene Oxide ◽  
Ordinary Portland Cement ◽  
Carbon Nanomaterials ◽  
Physical And Mechanical Properties ◽  
Comprehensive Review ◽  
Reduced Graphene ◽  
Cement Based Materials ◽  
Graphene Nanoplates

AbstractCarbon nanomaterials, predominantly carbon nanofibers, carbon nanotubes, graphene, graphene nanoplates, graphene oxide and reduced graphene oxide, possess superior chemical, physical and mechanical properties. They have been successfully introduced into ordinary Portland cement to give enhancements in terms of mechanical properties, durability and electrical/thermal conductivity, and to modify the functional properties, converting conventional cement-based materials into stronger, smarter and more durable composites. This paper provides a comprehensive review of the properties of carbon nanomaterials, current developments and novel techniques in carbon nanomaterials enhanced cement-based composites (CN-CBCs). Further study of the applications of CN-CBCs at industrial scale is also discussed.

scholarly journals Biological and physico-mechanical properties of poly(methyl methacrylate) enriched with graphene oxide as a potential biomaterial.

2021 ◽  
Vol 10 (2) ◽  
pp. 1-9
Author(s):  
René García-Contreras ◽  
◽  
Héctor Guzmán-Juárez ◽  
Daniel López-Ramos ◽  
Carlos Alvarez-Gayosso ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cell Proliferation ◽  
Graphene Oxide ◽  
Methyl Methacrylate ◽  
Cellular Proliferation ◽  
Testing Machine ◽  
Physical And Mechanical Properties ◽  
Biological Properties ◽  
Mechanical Tests ◽  
Poly Methyl Methacrylate

Objective: To determine the cytotoxicity and effects of graphene oxide (GO) on cellular proliferation of gingival-fibroblasts, pulpdental cells and human osteoblasts in culture, and to determine the physical, mechanical and biological properties of poly (methyl methacrylate) (PMMA) enriched with GO. Material and Methods: T he G O w as c haracterized with SEM. Cytotoxicity and cell proliferation were determined by the MTT bioassay. The physical-mechanical tests (flexural strength and elastic modulus) were carried out with a universal testing machine. Sorption and solubility were determined by weighing before and after drying and immersion in water. Porosity was evaluated by visual inspection. Data were analyzed with Student's t-test and Tukey's post-hoc ANOVA. Results: The GO has a heterogeneous morphology and a particle size of 66.67±64.76 μm. GO has a slight to no-cytotoxicity (>50-75% viability) at 1-30 days, and at 24 hours incubation of PMMA with GO significantly stimulates osteoblasts (45±8%, p<0.01). The physical and mechanical properties of PMMA with GO increase considerably without altering sorption, solubility and porosity. Conclusion: GO alone or with PMMA has an acceptable biocompatibility, could contribute to cell proliferation, cell regeneration and improve the physical-mechanical properties of PMMA.

scholarly journals The study on physical and mechanical properties of latex/graphene oxide composite film

2018 ◽  
Vol 1120 ◽  
pp. 012052
Author(s):  
S Gea ◽  
D A Barus ◽  
Y S Sibarani ◽  
N Panindia ◽  
J N Sari ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Composite Film ◽  
Physical And Mechanical Properties ◽  
Oxide Composite

Physical and mechanical properties of graphene oxide/polyethersulfone nanocomposites

2013 ◽  
Vol 25 (3) ◽  
pp. 322-328 ◽  
Author(s):  
T. Forati ◽  
M. Atai ◽  
A. M. Rashidi ◽  
M. Imani ◽  
A. Behnamghader
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Physical And Mechanical Properties

scholarly journals Effect of Graphene Oxide Nanoparticles on the Physical and Mechanical Properties of Medium Density Fiberboard

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1818
Author(s):  
Waheed Gul ◽  
Hussein Alrobei
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Urea Formaldehyde ◽  
Medium Density Fiberboard ◽  
Physical And Mechanical Properties ◽  
Modulus Of Rupture ◽  
Formaldehyde Resin ◽  
Oxide Nanoparticles ◽  
Medium Density ◽  
Thickness Swelling

In this research, the special effects of graphene oxide nanoparticle charging (0, 2, 4, 6, wt.%) on the properties of medium-density fiberboard were examined. Physical and mechanical properties of the panels were determined conferring the method of European Norm standards. The consequences exhibited substantial enhancement in mechanical properties, explicitly in modulus of rupture, modulus of elasticity and internal bonding for 2–6% nanoparticle addition in a urea–formaldehyde resin. The mechanical properties, i.e., internal bond, modulus of elasticity and modulus of rupture were improved by 28.5%, 19.22% and 38.8%, respectively. Results also show a clear enhancement in thickness swelling and water absorption. The physical properties of thickness swelling, water absorption and thermal conductivity were improved up to 50%, 19.5% and 39.79%, respectively. The addition of graphene oxide nanoparticles strongly affected the curing time of the urea–formaldehyde resin and improved its thermal stability.

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