Polymer-based Nanocomposites of P(VDF-TrFE)/Bi2O3 Applied to X-ray

Fontainha CCP, Baptista Neto AT, Faria LO
2016 Research & Reviews Journal of Material Sciences  
Exposures to high-energy or ionizing radiation can be hazardous to health. Radiation doses from either particle-emissions or high-energy electromagnetic waves such as X-rays/γ rays, may result in carcinogenesis, cell mutations and organ failure. Interventional radiology procedures such as fluoroscopy provide high doses to patients because they involve long periods of direct X-rays beam pointing to the same region. Digital mammography and radiography also provide radiation doses to the skin
more » ... the established limits [1, 2] . Thus, nowadays, there is a great interest in developing new radiation attenuator composites that shield part of the X-ray incident beam, aiming to minimize the patient skin injuries in specific high dose radiology procedures. Polymeric compounds are lightweight, conformable, flexible, and easy to process materials. Due to these properties, polymeric based mixtures are ideal candidates to produce thin and lightweight composites required in a wide range of technological applications. Polymer-composite materials for radiation protection filled with compounds or elements with good attenuation properties such as barium sulfate, gadolinium, lead, molybdenum, rhodium, tungsten, bismuth, zirconium oxide and iron oxide have been studied elsewhere [3] . According to Nambiar and Yeow [3] , polymers reinforced with micro-or nanoscale structures have ABSTRACT Radiology procedures such as fluoroscopy provide high doses to patients because they involve long periods of direct X-rays beam pointing to the same region. Composite materials containing compounds or elements with good attenuation properties such as barium sulfate and lead have been studied elsewhere. In this study, polymer based composites made of Poly(vinylidene fluoride-tryfluorethylene) [P(VDF-TrFE)] copolymers and micro and nanosized crystalline Bismuth Oxide were prepared. The main objective of this work was to identify the morphological differences between micro and nanocomposites and their performance as X-ray shielding material. The bismuth oxide was previously surface-modified with Methyl-Methacrylate Acid (MMA) in order to improve the homogeneity distribution. The X-ray shielding characterization was performed for photons with energies ranging from 6.5 keV to 83.5 keV. The nanocomposite P(VDF-TrFE)/nano Bi 2 O 3 -MMA revealed to have better attenuation features than the microcomposite, in the entire range of energy studied. DRX, DSC, FTIR and SEM images data were used in order to understand the difference in the radiation shielding features. The investigation has demonstrated that the P(VDF-TrFE)/nano Bi 2 O 3 -MMA nanocomposites are good candidates for application in radiology procedures as lightweight, conformable, flexible, and easy to process X-ray shielding materials.
doi:10.4172/2321-6212.1000149 fatcat:lzcxaotgfjdplne2kvhntyf3ye