Spectroscopic and sub optical band gap properties of e-beam irradiated ultra-high molecular weight polyethylene

Khan, Hareem; Gahfoor, Bilal; Mehmood, Malik Sajjad; Ahmad, Manzoor; Yasin, Tariq; Ikram, Manzoor

doi:10.1016/j.radphyschem.2015.08.013

Cited by 11 publications

(2 citation statements)

References 25 publications

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“…Moreover, the non-ionizing nature of light also reduces the health risk for workers associated with the radiation sterilization industry of medical products. However, when using light to modify, sterilize and/or stabilize UHMWPE [ 13 , 14 , 15 ], an investigation of optical properties (i.e., absorption coefficient μa, scattering coefficients μs in pristine and irradiated UHMWPE [ 10 , 16 ] and light distribution in pristine and irradiated UHMWPE [ 17 , 18 , 19 , 20 , 21 ]) needs to be conducted.…”

Section: Introductionmentioning

confidence: 99%

“…A significant amount of work has been done to investigate the optical properties and distribution of light in soft materials and various tissues [ 24 , 25 , 26 ]; however, UHMWPE’s optical behavior has seldom been investigated. In research, Hamna et al [ 20 ] highlighted the effects of radiation on spectroscopic properties, direct/indirect transition, and absorption behavior for e-beam irradiated UHMWPE. In another study, Asif et al [ 27 ] concluded the anisotropic nature of UHMWPE in the UV-VIS region and confirmed the forwarded scattering nature of UHMWPE for UV-VIS light.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of Light Distribution in Gamma Irradiated UHMWPE Using Monte Carlo Model for Light (MCML) Transport in Turbid Media: Analysis for Industrial Scale Biomaterial Modifications

et al. 2021

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(1) Background: This study investigated the miscibility of carbon-based fillers within industrial scale polymers for the preparation of superior quality polymer composites. It focuses on finding the light distribution in gamma irradiated ultra-high molecular weight polyethylene (UHMWPE). (2) Methods: The Kubleka–Munk model (KMM) was used to extract the optical properties, i.e., absorption coefficients (μa) and scattering coefficients (μs). Samples amounting to 30 kGy and 100 kGy of irradiated (in the open air) UHMWPE from 630 nm to 800 nm were used for this purpose. Moreover, theoretical validation of experimental results was performed while using extracted optical properties as inputs for the Monte Carlo model of light transport (MCML) code. (3) Conclusions: The investigations revealed that there was a significant decrease in absorption and scattering coefficient (μa & μs) values with irradiation, and 30 kGy irradiated samples suffered more compared to 100 kGy irradiated samples. Furthermore, the simulation of light transport for 800 nm showed an increase in penetration depth for UHMWPE after gamma irradiation. The decrease in dimensionless transport albedo μs(μa+μs) from 0.95 to 0.93 was considered responsible for this increase in photon absorption per unit area with irradiation. The report results are of particular importance when considering the light radiation (from 600 nm to 899 nm) for polyethylene modification and/or stabilization via enhancing the polyethylene chain mobility.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of Light Distribution in Gamma Irradiated UHMWPE Using Monte Carlo Model for Light (MCML) Transport in Turbid Media: Analysis for Industrial Scale Biomaterial Modifications

et al. 2021

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Synthesis, characterization, and electrical properties of polypyrrole–bimetallic oxide composites

Khan

Malook

Shah

2019

J of Applied Polymer Sci

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In this study, polypyrrole (PPy) and its bimetallic oxide composites (PPy-V 2 O 5 -MnO 2 ) were synthesized via a modified chemical oxidation polymerization method in the aqueous medium with FeCl 3 Á6H 2 O as an oxidant. The synthesized materials were characterized with various analytical techniques to investigate their structural, crystallographic, thermal, morphological, optical, and electrical properties. The Fourier transform infrared study confirmed the successful synthesis of the materials, whereas the X-ray diffraction analyses showed the amorphous and crystalline natures of the PPy and PPy-V 2 O 5 -MnO 2 composites, respectively. The bimetallic oxide content improved the thermal stability of the composites, as ratified by thermal analysis. The synthesized PPy had a globular and spongy nature, whereas the composites were mixtures of short and long rod-shaped particles. The bimetallic oxide blend enhanced the doping, surface area and semiconducting nature of composites, and lower electrical resistance compared with those of the PPy. The resistance of the synthesized materials depended on the V 2 O 5 -MnO 2 blend content in the composites and the temperature.

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Quantification of silane grafting efficacy, weak IR vibration bands and percentage crystallinity in post e-beam irradiated UHMWPE

et al. 2016

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Spectroscopic and sub optical band gap properties of e-beam irradiated ultra-high molecular weight polyethylene

Cited by 11 publications

References 25 publications

Simulation of Light Distribution in Gamma Irradiated UHMWPE Using Monte Carlo Model for Light (MCML) Transport in Turbid Media: Analysis for Industrial Scale Biomaterial Modifications

Simulation of Light Distribution in Gamma Irradiated UHMWPE Using Monte Carlo Model for Light (MCML) Transport in Turbid Media: Analysis for Industrial Scale Biomaterial Modifications

Synthesis, characterization, and electrical properties of polypyrrole–bimetallic oxide composites

Quantification of silane grafting efficacy, weak IR vibration bands and percentage crystallinity in post e-beam irradiated UHMWPE

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