Electron beam irradiation processing for industrial and medical applications

Ozer, Zehra Nur

doi:10.1051/epjconf/201715401019

Cited by 14 publications

(8 citation statements)

References 8 publications

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“…The e‐Beam had a Gaussian profile of dose rate distribution with maximum dose rate

D_{o}

= 200 Gy s −1 by using a mean beam intensity of 4 µA. The irradiation doses between 10 and 150 kGy ordinarily used in most industrial applications can be accumulated by using dose rates of 100–500 Gy s −1 , which are typical for research electron accelerators, in a few minutes. The irradiations were carried out at the background temperature (22 °C) and normal pressure under air.…”

Section: Methodsmentioning

confidence: 99%

Heat Transport in Starch Exposed to Ionizing Radiation: Experiment Versus Theoretical Computer Modeling

2019

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The paper deals with the experimental and theoretical study of the temperature distribution in granular starch exposed to ionizing radiation. In this respect, corn starch is irradiated by using a field of accelerated electrons of mean energy of 5.5 MeV for a period of 435 s. A sensor is placed inside the starch sample to record the temperature during irradiation and after irradiation until room temperature is reached again. From a theoretical point of view, in order to describe the temperature field, a mathematical model based on the heat equation in Cattaneo-Vernote formalism is developed and solved by using the integral transform technique on finite domains. The relaxation time ( 0 ), the "hottest point," and the maximum temperature reached in the "hottest point" are determined through the proposed model. The knowledge of the thermal field inside the target sample, especially in the "hottest point," is essential in planning and optimization of the experiments that involves rigorous control of temperature in starch related irradiation applications in order to avoid the thermal runway during experiments.

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“…The e‐Beam had a Gaussian profile of dose rate distribution with maximum dose rate

D_{o}

Section: Methodsmentioning

confidence: 99%

Heat Transport in Starch Exposed to Ionizing Radiation: Experiment Versus Theoretical Computer Modeling

2019

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“…Relatively large areas can be modified using UV or γ-irradiation and plasma treatment processes in a single run, while e-beam irradiation and UV-excimer laser irradiation processes require scanning the substrate material to treat the entire area. Therefore, the dwell time and line speed are other important treatment parameters to consider for these processes …”

Section: Important Considerations For Using Dry Surface Modification ...mentioning

confidence: 69%

“…Therefore, the dwell time and line speed are other important treatment parameters to consider for these processes. 41 For optimization of dry surface modification processes, a change in one treatment parameter could be compensated by another, but the correlation is not necessarily linear. For example, irradiation of mulberry silk fabric surfaces using a monochromatic VUV excimer lamp resulted in an increase in wettability as the antenna−substrate distance decreased and with longer treatment times.…”

Section: Important Considerations For Using Dry Surface Modification ...mentioning

confidence: 99%

“…40 E-beam irradiation typically requires a more complex setup compared to UV and γ irradiation, consisting of a power supply unit, accelerator tube, scanning system, irradiation window, and vacuum system. 41 Depending on the application, the acceleration applied to the electron can be adjusted freely to modify the final electron energy applied to the substrate. For example, lower energies (150−300 keV) are typically applied in curing and surface-coating applications, whereas higher energies are employed for deeper penetration in polymer cross-linking (up to 1.5 MeV) and sterilization applications (up to 10 MeV).…”

Section: Introduction To Dry Surface Treatment Techniquesmentioning

confidence: 99%

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Dry Surface Treatments of Silk Biomaterials and Their Utility in Biomedical Applications

Lau

Akhavan

Lord

et al. 2020

ACS Biomater. Sci. Eng.

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Silk-based materials are widely used in biomaterial and tissue engineering applications due to their cytocompatibility and tunable mechanical and biodegradation properties. Aqueous-based processing techniques have enabled the fabrication of silk into a broad range of material formats, making it a highly versatile material platform across multiple industries. Utilizing the full potential of silk in biomedical applications frequently requires modification of silk's surface properties. Dry surface modification techniques, including irradiation and plasma treatment, offer an alternative to the conventional wet chemistry strategies to modify the physical and chemical properties of silk materials without compromising their bulk properties. While dry surface modification techniques are more prevalent in textiles and sterilization applications, the range of modifications available and resultant changes to silk materials all point to the utility of dry surface modification for the development of new, functional silk biomaterials. Dry surface treatment affects the surface chemistry, secondary structure, molecular weight, topography, surface energy, and mechanical properties of silk materials. This Review describes and critically evaluates the effect of physical dry surface modification techniques, including irradiation and plasma processes, on silk materials and discusses their utility in biomedical applications, including recent examples of modulation of cell/protein interactions on silk biomaterials, in vivo performance of implanted biomaterials, and applications in material biofunctionalization and lithographic surface patterning approaches.

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“…Gamma, X-rays, and accelerated electron beams are used mostly in the industry for various applications as well as food irradiation (Ozer 2017). Gamma rays from Co-60 or Cs-137 (below 5 MeV energy level) are commonly used since they have high penetrating power, low dose rate, and foods can be irradiated with their thick coverage packages.…”

Section: Introductionmentioning

confidence: 99%

Application of Electron Beam Irradiation Technique for Shelf-Life Extension of Animal Food Products

Ozer¹

2020

Kocatepe Veterinary Journal

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For food processing gamma rays, electron beam and X-rays are used for disinfection of microorganisms and for extension of the shelf-life of the food. Electron beam irradiation process and its facilities are discussed widely for animal food products, nowadays. Although there are many advantages of this technique, high doses may be needed to achieve desired purposes. The irradiation conditions such as irradiation energy, dose and speed, penetration depth, processing speed should be optimized for such an irradiation apparatus design. The type and the size of the food; if it is fresh, frozen or in packets; transition process to atmospheric medium and irradiation parameters are the issues that need to be adjusted carefully according to aims. In this work, design parameters of an electron beam irradiation system are described and simulation of a low energy electron curtain accelerator is introduced. This study was carried out as the first step with the construction idea of a system that is planned to be made most appropriately in the current laboratory conditions. Also is to demonstrate the operability of such a system at low energies for sterilization on the surface of the target material.

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Electron beam irradiation processing for industrial and medical applications

Cited by 14 publications

References 8 publications

Heat Transport in Starch Exposed to Ionizing Radiation: Experiment Versus Theoretical Computer Modeling

Heat Transport in Starch Exposed to Ionizing Radiation: Experiment Versus Theoretical Computer Modeling

Dry Surface Treatments of Silk Biomaterials and Their Utility in Biomedical Applications

Application of Electron Beam Irradiation Technique for Shelf-Life Extension of Animal Food Products

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