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Characteristics of X-ray attenuation in electrospun bismuth oxide/polylactic acid nanofibre mats.

Journal of synchrotron radiation (2013-08-21)
Nurul Z Noor Azman, Salim A Siddiqui, Hazim J Haroosh, Hani M M Albetran, Bernt Johannessen, Yu Dong, It M Low
ABSTRACT

The characteristics of the X-ray attenuation in electrospun nano(n)- and micro(m)-Bi2O3/polylactic acid (PLA) nanofibre mats with different Bi2O3 loadings were compared as a function of energy using mammography (i.e. tube voltages of 22-49 kV) and X-ray absorption spectroscopy (XAS) (7-20 keV). Results indicate that X-ray attenuation by electrospun n-Bi2O3/PLA nanofibre mats is distinctly higher than that of m-Bi2O3/PLA nanofibre mats at all energies investigated. In addition, with increasing filler loading (n-Bi2O3 or m-Bi2O3), the porosity of the nanofibre mats decreased, thus increasing the X-ray attenuation, except for the sample containing 38 wt% Bi2O3 (the highest loading in the present study). The latter showed higher porosity, with some beads formed, thus resulting in a sudden decrease in the X-ray attenuation.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Polylactic acid, Mw ~60,000
Sigma-Aldrich
Bismuth(III) oxide, ReagentPlus®, powder, 10 μm, 99.9% trace metals basis
Sigma-Aldrich
Bismuth(III) oxide, powder, 99.999% trace metals basis
Sigma-Aldrich
Bismuth, powder, −100 mesh, 99% trace metals basis
Sigma-Aldrich
Bismuth, granular, ≥99.99% trace metals basis
Sigma-Aldrich
Bismuth, pieces, 1-12 mm, 99.999% trace metals basis
Sigma-Aldrich
Bismuth, powder, −100 mesh, ≥99.99% trace metals basis
Sigma-Aldrich
Bismuth(III) oxide, nanopowder, 90-210 nm particle size, 99.8% trace metals basis
Sigma-Aldrich
Bismuth(III) oxide, purum, ≥98.0% (KT)
Sigma-Aldrich
Bismuth, shot, 4-30 mesh, 99.9% trace metals basis
Sigma-Aldrich
Bismuth, beads, 1-5 mm, 99.999% trace metals basis