Study on gamma shielding polymer composites reinforced with different sizes and proportions of tungsten particles using MCNP code

The aim of this study is to prepare a non-toxic, light, flexible and low-cost radiation shielding material that protects against gamma ray (γ-ray). So, flexible and lead-free gamma-ray-shielding composites based on room temperature vulcanizing silicone rubber matrix with 37.5% weight of tungsten (W) and bismuth oxide (Bi2O3) as filler materials were prepared by using a simple and well-established open mould cast technique. The shielding properties of the composites [linear attenuation coefficient (µ), transmittance, half value layer (HVL) and tenth value layer (TVL)] have been evaluated using 152Eu radioactive source in the energy range (122–964 keV). The prepared composites show high performance in gamma-ray-shielding in comparison with commercial composite (76% Pb). The sample that was treated with 18.75 wt% W + 18.75 wt% Bi2O3 shows the lowest values of HVL and TVL in high energy levels and is the best-attenuating shielding for γ-ray compared to the other investigated samples. Morphological observations showed that increasing of Bi2O3 in samples can prevent from the accumulation of fillers. For this reason, the tensile strength and elongation at break improved with increasing of Bi2O3 in composites.

Efficient, flexible and lead-free composite based on room temperature vulcanizing silicone rubber/W/Bi 2 O 3 for gamma ray shielding application

Study of electrospun PVA-based concentrations nanofibre filled with Bi2O3 or WO3 as potential x-ray shielding material

Experimental and Monte Carlo investigations of gamma ray transmission and buildup factors for inorganic nanoparticle/epoxy composites

X-ray shielding behavior of garment woven with melt-spun polypropylene monofilament

Lead-shielding products, such as lead aprons, are important materials for personal protection of physicians and patients from X-ray radiation during medical operations. However, lead has environmen...

An alternative X-ray shielding material based on coated textiles:

In this paper, tungsten, bismuth, tin, and copper powders were used as additives in the fabric coating to obtain lead-free and flexible x-ray shielding material. The X-ray attenuation and the flexu...

The X-ray attenuation and the flexural properties of lead-free coated fabrics

The Effect of Tungsten Particle Sizes on X-ray Attenuation Properties

Bu calismada, tekstil bazli kursun icermeyen kalkanlama malzemelerinin x-ray atenuasyon ve egilme dayanimi ozellikleri incelenmistir. Kursuna alternatif, tungsten ve baryum sulfat tozlari radyopak katki olarak tekstil kaplamasi icerisinde kullanilmistir. Pamuklu kumaslar agirliksal olarak esit miktarda (%60) tungsten ve baryum sulfat katki iceren silikon kaucuk ile kaplanmistir. Numunelerin x-ray atenuasyon oranlari medikal korunma standartlari goz onunde bulundurularak 80kV, 100kV ve 150kV tup voltaji seviyelerinde olculmustur. Bunun yani sira, tekstil yuzeyi uzerindeki kaplamanin tekrarli egilmelere karsi dayanimi gozlemlenmis ve yuzeyler SEM ve EDS teknikleri kullanilarak degerlendirilmistir. Sonuclara gore tungsten katki iceren silikon kaucuk kaplamali numuneler baryum sulfat-silikon kaucuk kaplamalilara gore ayni kalinlikta daha iyi atenuasyon oranlarina sahip olmustur. Bununla beraber, baryum-silikon kaucuk kaplamalarda egilme testi sonucunda yuzeyde catlaklar meydana gelirken, tungsten-silikon kaucuk kaplamali kumaslar yuksek egilme dayanimi gostermistir

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Tungsten ve baryum sülfat katkili kaplanmiş kumaşlarin x-ray zayiflatma ve eği̇lme dayanimi özelli̇kleri̇ni̇n i̇ncelenmesi̇

Washed denim garments represent a popular field of fashion design, and environmental effects of denim washing are being increasingly explored since the process has adverse impacts on the environment due to its chemical discharge and other pollutant emissions that affect water sup-plies. As one of the biggest suppliers of denim apparel manufacturing worldwide, Turkey has also faced problems of high water consumption and pollution. To reveal the pressure on the envi-ronment caused by the denim washing sub- sector in particular, the water related environmental negative impacts in the industry need to not only be quantified, but also reduced. Accordingly, the study was conducted to develop a sustainable washing process for blue jeans for a medium scaled, commercial denim apparel washing plant. The results showed that the sustainable washing approach displayed superior performance with 36% lower grey water footprint (GWF), lower environmental impact in all categories, 28% lower overall energy demand, 50% lower natural gas and 36% lower direct water resource consumption with similar garment quality and washing effect attained.

F. Banu Nergis

Papers

An alternative X-ray shielding material based on coated textiles:

The X-ray attenuation and the flexural properties of lead-free coated fabrics

The Effect of Tungsten Particle Sizes on X-ray Attenuation Properties

Tungsten ve baryum sülfat katkili kaplanmiş kumaşlarin x-ray zayiflatma ve eği̇lme dayanimi özelli̇kleri̇ni̇n i̇ncelenmesi̇

Water Conscious Blue Jeans Washing Process: A Case Study of Turkey