scholarly journals Preparation, morphological, and mechanical characterization of titanium dioxide (TiO2)/polyvinyl alcohol (PVA) composite for gamma-rays radiation shielding

2019 ◽  
Vol 1279 ◽  
pp. 012019 ◽  
Author(s):  
R. K. Fakher Alfahed ◽  
Kareem K. Mohammad ◽  
Munaf S. Majeed ◽  
Hussain Ali Badran ◽  
Kamal M. Ali ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Polyvinyl Alcohol ◽  
Gamma Rays ◽  
Mechanical Characterization ◽  
Radiation Shielding

scholarly journals Mechanical Characterization of Nanocomposite Joints Based on Biomedical Grade Polyethylene under Cyclical Loads

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2681
Author(s):  
Annamaria Visco ◽  
Cristina Scolaro ◽  
Antonino Quattrocchi ◽  
Roberto Montanini
Keyword(s):  
Titanium Dioxide ◽  
Mechanical Response ◽  
Mechanical Characterization ◽  
Laser Light ◽  
Mechanical Tests ◽  
Fatigue Tests ◽  
Weight Content ◽  
Percentage Weight ◽  
Static Mechanical

Polymeric joints, made of biomedical polyethylene (UHMWPE) nanocomposite sheets, were welded with a diode laser. Since polyethylene does not absorb laser light, nanocomposites were prepared containing different percentages by weight of titanium dioxide as it is a laser absorbent. The joints were first analyzed with static mechanical tests to establish the best percentage weight content of filler that had the best mechanical response. Then, the nanocomposites containing 1 wt% titanium dioxide were selected (white color) to be subjected to fatigue tests. The experimental results were also compared with those obtained on UMMWPE with a different laser light absorbent nano filler (carbon, with greater laser absorbing power, gray in color), already studied by our research team. The results showed that the two types of joints had an appreciable resistance to fatigue, depending on the various loads imposed. Therefore, they can be chosen in different applications of UHMWPE, depending on the stresses imposed during their use.

Optical and mechanical characterization of spin-on deposited silicon and titanium dioxide films

1990 ◽  
Author(s):  
Pengnian Shen ◽  
Ming-Jun Li ◽  
S. Iraj Najafi ◽  
John F. Currie ◽  
Richard Leonelli
Keyword(s):  
Titanium Dioxide ◽  
Mechanical Characterization ◽  
Titanium Dioxide Films

scholarly journals Preparation and Pharmaco-Mechanical Characterization of Ketoprofen- Polyvinyl Alcohol Cryogel for Medical Applications

2019 ◽  
Vol 70 (3) ◽  
pp. 848-852
Author(s):  
Monica Iliuta Stamate ◽  
Lacramioara Ochiuz ◽  
Daniel Timofte ◽  
Bogdan Ciuntu ◽  
Cristina Ghiciuc ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Mechanical Characterization ◽  
Water Soluble ◽  
Mechanical Resistance ◽  
Medical Applications ◽  
Water Soluble Polymer ◽  
Different Temperatures ◽  
Polymeric Solutions ◽  
Equilibrium Swelling Ratio

Polyvinyl alcohol is a biocompatible polymer used very commonly both in pharmaceutical and medical fields. Being a water-soluble polymer, it is suitable for the manufacture of hydrogels as well as cryogels used for various medical applications. The present work describes the preparation, structural and physico-mechanical characterization of polyvinyl alcohol cryogels loaded with ketoprofen. By cryogenic technique the polymeric solutions are transformed under certain conditions into porous, elastic and very compressible structures. They are able to absorb a large amount of liquids that they give off by gentle compression. The prepared cryogels were evaluated for different physical, chemical and structural properties, as following: internal morphology, equilibrium swelling ratio and mechanical testing. The cryogel structures show good elasticity and optimal swelling at different temperatures. Due to these properties the studied cryogels are suitable for use in various medical applications involving liquid absorption, mechanical resistance and anti-inflammatory effect.

Mechanical characterization of polyethylene-based thermoplastic composite materials for radiation shielding

2019 ◽  
Vol 13 ◽  
pp. 37-41 ◽  
Author(s):  
Korey Herrman ◽  
Lynsey N. Baxter ◽  
Kunal Mishra ◽  
Eric Benton ◽  
Raman P. Singh ◽  
...  
Keyword(s):  
Composite Materials ◽  
Mechanical Characterization ◽  
Radiation Shielding ◽  
Thermoplastic Composite

Water Adsorption Thermodynamical Analysis and Mechanical Characterization of Chitosan and Polyvinyl Alcohol-Based Films

2021 ◽  
Author(s):  
Rocio Y. Aguirre-Loredo ◽  
Gonzalo Velazquez ◽  
Andrea Y. Guadarrama-Lezama ◽  
Rubi Viveros-Contreras ◽  
Johanna Castaño
Keyword(s):  
Polyvinyl Alcohol ◽  
Water Adsorption ◽  
Mechanical Characterization

BaSO4/Polyvinyl Alcohol Composites for Radiation Shielding

2015 ◽  
Vol 804 ◽  
pp. 3-6 ◽  
Author(s):  
Voranuch Thongpool ◽  
Akapong Phunpueok ◽  
Naris Barnthip ◽  
Sarawut Jaiyen
Keyword(s):  
Polyvinyl Alcohol ◽  
Optical Density ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Radioactive Source ◽  
Radiation Shielding ◽  
Specimen Thickness ◽  
Attenuation Coefficients ◽  
X Ray ◽  
Shielding Properties

The gamma ray and X-ray shielding properties of PVA containing different proportions of BaSO4 as an aggregate have been investigated. The photon linear attenuation coefficients were measured by using 241Am radioactive source (59.54 keV). Gamma rays were counted by a NaI(Tl) detector. It was found that the shielding efficiency increased when increasing the amount of BaSO4 and specimen thickness. The linear attenuation coefficients were 0.085, 0.125, 0.179, and 0.189 for 0.2, 0.4, 0.6, and 0.8%w/v of BaSO4. The X-ray attenuation test was performed using the diagnostic X-ray machine for energy of 45 kVp. The optical density of X-ray films was investigated. The results showed that the optical density of X-ray film decreased when increasing the amounts of BaSO4.

Sign in / Sign up

Export Citation Format

Share Document