Synthesis and Characterization of Cerium- and Lanthanum Containing Bioactive Glass

2017 ◽  
Vol 751 ◽  
pp. 617-628 ◽  
Author(s):  
Md Ershad ◽  
Vikas Kr Vyas ◽  
Sunil Prasad ◽  
Akher Ali ◽  
Ram Pyare

Synthesis and characterization of bioglass® of general composition (45-X-Y) SiO2, 24.5 Na2O, 24.5 CaO and 6.0 P2O5 (wt %) was modified by addition of X= (0-1) wt % of CeO2 and Y= (0-1) wt % of La2O3 respectively. These five samples were prepared in alumina crucible via melting route at a temperature of 1400±5 °C with air as a furnace atmosphere. These glass samples were immersed in simulated body fluid (SBF) for different time period and their bioactivity were determined by Fourier transform infrared spectroscopy (FTIR) analysis. Surface morphology was studied by using Scanning electron microscope (SEM). Bioactivity, pH measurement of bioactive glass was carried out and mechanical properties of these glasses increased with increasing concentration of CeO2 and La2O3.

2012 ◽  
Vol 465 ◽  
pp. 76-79 ◽  
Author(s):  
Shuang Zhan ◽  
Xia Li

The novel Y2O3 nanoflowers were synthesized through a facile hydrothermal method without using any catalyst or template. The phase composition and the microstructure of as-prepared products were characterized by field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD) as well as Fourier transform infrared spectrum. The formation mechanism for the Y2O3 flowers has been proposed.


2013 ◽  
Vol 575-576 ◽  
pp. 58-60
Author(s):  
Wei Ping Tang

In this present work, a new method for preparing NiO doped SnO2 nanoflowers by hydrothermal route is suggested. The composition and microstructure of samples were characterized by field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and Fourier transform infrared spectrum (FTIR). Moreover, a possible formation mechanism was discussed.


Author(s):  
San San Htwe

<p>This research paper objects is synthesis and characterization of Cu2O nanofluid by using the chemical solution method. Characterization includes Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM). The absorption peaks of FTIR spectrum can express the characterization of Cu2O nanofluids. The SEM image graph can be expressed size d shape of the Cu2O sample on the surfactant and pH of the mixture solution respectively. Cu2O Nanofluids will be studied for their thermal conductivity and their electrical, magnetic and optical properties.</p>


2014 ◽  
Vol 548-549 ◽  
pp. 90-95 ◽  
Author(s):  
Hamidah Harahap ◽  
Elmer Surya ◽  
Indra Surya ◽  
Hanafi Ismail ◽  
Baharin Azahari

In this study, an effect of leaching treatment on the mechanical properties of natural rubber latex (NRL) products was investigated. The products were prepared by compounding the NRL dispersion system with modified kaolin as fillers then it was formed by dipping method. It was found that incorporation of fillers in NRL would result in lowering mechanical properties of vulcanizates when the leaching was performed. The results were confirmed further by characterization of Fourier-Transform Infra-Red (FTIR) and Scanning Electron Microscopy (SEM).


2011 ◽  
Vol 415-417 ◽  
pp. 1196-1199 ◽  
Author(s):  
Heun Hyo Noh ◽  
Jong Keun Lee ◽  
Xing Liu ◽  
Yong Man Choi

Polyurethane dispersion modified with polymethylsiloxane (Si-PUD) and its nanocomposites incorporated with clays (Cloisite 15A and 30B at 3 and 6 wt%) were synthesized and characterized in this work. FTIR analysis showed that Si-PUD and Si-PUD/clay nanocomposites were successfully manufactured. While the glass transition temperature was not affected by the modification of the siloxane and clays, thermal resistance from TGA and mechanical properties such as tensile strength and elongation at break from UTM were largely enhanced at 3 wt% of both C15A and C30B clay. Higher content of 6 wt% of C30B has inferior to other Si-PUD samples containing clay in mechanical properties. Surface with higher hydrophobicity was observed for Si-PUD and Si-PUD/clay nanocomposites compared to PUD.


2009 ◽  
Vol 28 (3) ◽  
pp. 179-191 ◽  
Author(s):  
Imelda Olivas-Armendariz ◽  
Perla E. García-Casillas ◽  
Alberto Martínez-Villafañe ◽  
Carlos A. Martinez-Pérez

In this work the synthesis and characterization of polyurethane (PU)-chitosan(CH) porous prepared by thermal induced phase separation (TIPS) is described, the obtained products were characterized by thermo gravimetric analysis (TGA) and differential scanning calorimetry (DSC), evidence of the interaction between both polymers was acquired from infrared spectroscopy. The morphology of the scaffolds was studied by scanning electron microscopy also the mechanical properties were acquired. The results showed that the TIPS technique is appropriate for the production of PU-CH porous materials.


2021 ◽  
Author(s):  
Shu bin Li ◽  
Xiao Wang ◽  
Jiang Zhu ◽  
Zhenyu Wang ◽  
Lu Wang

In this work, using carboxyl-modified Fe3O4 nanoparticles as a photothermal agent, combining the chemical amide bond and intermolecular hydrogen bond crosslinking force, a photothermal hydrogel with enhanced mechanical properties was...


Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1801
Author(s):  
Rafał Oliwa ◽  
Joanna Ryszkowska ◽  
Mariusz Oleksy ◽  
Monika Auguścik-Królikowska ◽  
Małgorzata Gzik ◽  
...  

We investigated the effect of the type and amount of expandable graphite (EG) and blackcurrant pomace (BCP) on the flammability, thermal stability, mechanical properties, physical, and chemical structure of viscoelastic polyurethane foams (VEF). For this purpose, the polyurethane foams containing EG, BCP, and EG with BCP were obtained. The content of EG varied in the range of 3–15 per hundred polyols (php), while the BCP content was 30 php. Based on the obtained results, it was found that the additional introduction of BCPs into EG-containing composites allows for an additive effect in improving the functional properties of viscoelastic polyurethane foams. As a result, the composite containing 30 php of BCP and 15 php of EG with the largest particle size and expanded volume shows the largest change in the studied parameters (hardness (H) = 2.65 kPa (+16.2%), limiting oxygen index (LOI) = 26% (+44.4%), and peak heat release rate (pHRR) = 15.5 kW/m2 (−87.4%)). In addition, this composite was characterized by the highest char yield (m600 = 17.9% (+44.1%)). In turn, the change in mechanical properties is related to a change in the physical and chemical structure of the foams as indicated by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) analysis.


2012 ◽  
Vol 174-177 ◽  
pp. 508-511
Author(s):  
Lin Lin Yang ◽  
Yong Gang Wang ◽  
Yu Jiang Wang ◽  
Xiao Feng Wang

BiFeO3 polyhedrons had been successfully synthesized via a hydrothermal method. The as-prepared products were characterized by power X-ray diffraction (XRD) pattern, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The possible mechanisms for the formation of BiFeO3 polyhedrons were discussed. Though comparison experiments, it was found that the kind of precursor played a key role on the morphology control of BiFeO3 crystals.


2016 ◽  
Vol 7 (14) ◽  
pp. 2553-2564 ◽  
Author(s):  
Yating Jia ◽  
Weizhong Wang ◽  
Xiaojun Zhou ◽  
Wei Nie ◽  
Liang Chen ◽  
...  

A poly(glycerol sebacate)-based elastomeric copolyesters with improved mechanical properties and higher water uptake capacity.


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