scholarly journals Physical Characterization of Bismuth Oxide Nanoparticle Based Ceramic Composite for Future Biomedical Application

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1626
Author(s):  
Pravin Jagdale ◽  
Gianpaolo Serino ◽  
Goldie Oza ◽  
Alberto Luigi Audenino ◽  
Cristina Bignardi ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Bismuth Oxide ◽  
Biomedical Application ◽  
Three Point Bending ◽  
Weight Losses ◽  
Bismuth Oxide Nanoparticles ◽  
Dispersion Media ◽  
Oxide Nanoparticle ◽  
The Impact

Employment and the effect of eco-friendly bismuth oxide nanoparticles (BiONPs) in bio-cement were studied. The standard method was adopted to prepare BiONPs-composite. Water was adopted for dispersing BiONPs in the composite. A representative batch (2 wt. % of BiONPs) was prepared without water to study the impact of water on composite properties. For each batch, 10 samples were prepared and tested. TGA (thermogravimetric analysis) performed on composite showed 0.8 wt. % losses in samples prepared without water whereas, maximum 2 wt. % weight losses observed in the water-based composite. Presence of BiONPs resulted in a decrease in depth of curing. Three-point bending flexural strength decreased for increasing BiONPs content. Comparative study between 2 wt. % samples with and without water showed 10.40 (±0.91) MPa and 28.45 (±2.50) MPa flexural strength values, respectively, indicating a significant (p < 0.05) increase of the mechanical properties at the macroscale. Nanoindentation revealed that 2 wt. % without water composites showed significant (p < 0.05) highest nanoindentation modulus 26.4 (±1.28) GPa and hardness 0.46 (±0.013) GPa. Usage of water as dispersion media was found to be deleterious for the overall characteristics of the composite but, at the same time, the BiONPs acted as a very promising filler that can be used in this class of composites.

Mechanical Response of Porous Copper Manufactured by Lost Carbonate Sintering Process

2007 ◽  
Vol 539-543 ◽  
pp. 1863-1867 ◽  
Author(s):  
X.F. Tao ◽  
Li Ping Zhang ◽  
Y.Y. Zhao
Keyword(s):  
Particle Size ◽  
Flexural Strength ◽  
Relative Density ◽  
Mechanical Response ◽  
Compaction Pressure ◽  
Absorption Capacity ◽  
Energy Absorption Capacity ◽  
Three Point Bending ◽  
Porous Copper ◽  
The Impact

This paper investigated the mechanical response of porous copper manufactured by LCS under three-point bending and Charpy impact conditions. The effects of the compaction pressure and K2CO3 particle size used in producing the porous copper samples and the relative density of the samples were studied. The apparent modulus, flexural strength and energy absorption capacity in three-point bending tests increased exponentially with increasing relative density. The impact strength was not markedly sensitive to relative density and had values within 7 – 9 kJ/m2 for the relative densities in the range 0.17 – 0.31. The amount of energy absorbed by a porous copper sample in the impact test was much higher than that absorbed in the three-point bending test, impling that loading strain rate had a significant effect on the deformation mechanisms. Increasing compaction pressure and increasing K2CO3 particle size resulted in significant increases in the flexural strength and the bending energy absorption capacity, both owing to the reduced sintering defects.

Effect of stitch and biaxial yarn types on the impact properties of biaxial weft knitted textile composites

2013 ◽  
Vol 20 (3) ◽  
pp. 255-264 ◽  
Author(s):  
Ozgur Demircan ◽  
Tatsuya Kosui ◽  
Shinsuke Ashibe ◽  
Yohji Hamada ◽  
Asami Nakai
Keyword(s):  
Microstructural Characterization ◽  
Optical Microscope ◽  
Textile Composites ◽  
Composite Panel ◽  
Weft Yarn ◽  
Plate Bending ◽  
Impact Properties ◽  
Three Point Bending ◽  
The Impact

AbstractWithin the scope of experiments, the effects of stitch yarn type, such as aramid, glass, and nylon, and biaxial, warp, and weft yarn type, such as aramid and glass, on biaxial weft knitted (BWK) composites were investigated. Five different types of composite panel, which include fiber contents, such as glass-glass-glass, glass-glass-nylon, glass-glass-aramid, aramid-glass-aramid, and aramid-aramid-aramid, were fabricated by hand lay-up method. After the production of composite panels, three-point bending impact and plate bending impact tests were conducted on the specimens. Microstructural characterization of the impact-tested materials was performed using an optical microscope. This study shows that composites with BWK preforms consisting of fiber combinations such as glass-glass-aramid had higher plate bending impact and three-point bending impact properties than the other four types of composite structure.

Synthesis and Characterization of Stable Iron Oxide Nanoparticle with Amino Covalent Binding on the Surface for Biomedical Application

2016 ◽  
Vol 27 (4) ◽  
pp. 1383-1393 ◽  
Author(s):  
Manoj Singh ◽  
Natalia Sviridenkova ◽  
Nizamov Timur ◽  
Alexander Savchenko ◽  
Igor Shetinin ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Biomedical Application ◽  
Covalent Binding ◽  
Synthesis And Characterization ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticle

scholarly journals Preparation and Characterization of Sodium Aluminum Silicate-Polymer Composites and Effects of Surface Roughness and Scratch Directions on Their Flexural Strengths

2021 ◽  
Vol 8 ◽  
Author(s):  
Bencang Cui ◽  
Fengbo Sun ◽  
Qian Ding ◽  
Huining Wang ◽  
Yuanhua Lin ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Flexural Strength ◽  
Aluminum Silicate ◽  
Three Point Bending ◽  
Surface Areas ◽  
Sodium Aluminum Silicate ◽  
Large Roughness ◽  
The Relationship ◽  
Dental Restorative

Although efforts have been put into the research in polymer-infiltrated ceramic network composites (PICNs), data are needed to understand the relationship between surface roughness and flexural strength. In this work, a novel dental restorative composite was fabricated via infiltrating mixtures of Bis-GMA/TEGDMA and UDMA/TEGDMA into partially sintered porous sodium aluminum silicate blocks and curing. Bars with different surface conditions were produced by sanding with abrasive and polishing. Flexural strength was measured using three-point-bending. Scanning electron microscopy (SEM) was employed to observe the microstructure of surface areas. One-way analysis of variance was applied for statistical calculations, with p &lt; 0.05 being considered significant. Weibull plots were used to evaluate the reliability of flexural strength. The results demonstrated that the flexural strength of the resultant composites was affected by the scratch direction and the value of roughness. The flexural strength increased with decrease of surface roughness. A higher strength value was found for parallel types than for vertical types with nearly the same surface roughness. A large roughness value and a scratch direction perpendicular to tensile stress produced a low Weibull modulus. Of particular importance with this work is that these factors should be taken into consideration when using PICNs as dental restorative composites.

scholarly journals Alginate-Based Composite and Its Biomedical Applications

2021 ◽  
Author(s):  
Yaling Deng ◽  
Ningning Yang ◽  
Oseweuba Valentine Okoro ◽  
Amin Shavandi ◽  
Lei Nie
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Cell Proliferation ◽  
Wound Dressing ◽  
Chondrogenic Differentiation ◽  
Structural Changes ◽  
Biomedical Application ◽  
Essential Properties ◽  
The Impact

Alginate has received much attention due to its biocompatibility. However, the properties of pure alginate are limited, such as weak mechanical strength, which limits its application. Alginate-based composite effectively overcomes the defect of pure alginate. The molecular weight and microstructure can be designed. More importantly, the essential properties for clinical application are improved, including mechanical properties, biocompatibility, gelation ability, chondrogenic differentiation and cell proliferation. This chapter will describe development of alginate-based composite in biomedical application. In the fields of wound dressing, drug delivery, and tissue engineering, the impact of structural changes on performance has been stated. To provide readers with understanding of this chapter, the structure and characterization of alginate will be included.

scholarly journals Characterization of three-point bending properties of metal–resin interpenetrating phase composites

RSC Advances ◽  
2018 ◽  
Vol 8 (29) ◽  
pp. 16171-16177 ◽  
Author(s):  
Bibo Yao ◽  
Zhaoyao Zhou ◽  
Liuyang Duan ◽  
Zengtao Chen
Keyword(s):  
Flexural Strength ◽  
Bending Properties ◽  
Three Point Bending ◽  
Fiber Fractions ◽  
Interpenetrating Phase Composites

Three-point bending properties of the metal–resin IPCs exhibit anisotropy. Flexural strength increases with increasing fiber fractions and finer fibers improve the properties. The fracture shows both brittle and plastic characteristics.

Evaluation of The Biological Activities of Ag Doped Bismuth Oxide Nanoparticles

2011 ◽  
Vol 4 (6) ◽  
pp. 53-56 ◽  
Author(s):  
Vennila Raj ◽  
◽  
P. Kamaraj P. Kamaraj ◽  
M. Arthanareeswari M. Arthanareeswari ◽  
J. Deepika J. Deepika
Keyword(s):  
Bismuth Oxide ◽  
Biological Activities ◽  
Oxide Nanoparticles ◽  
Bismuth Oxide Nanoparticles
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