scholarly journals Water Absorption Kinetics in Composites Degraded by the Radiation Technique

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4659
Author(s):  
Elena Manaila ◽  
Gabriela Craciun ◽  
Daniel Ighigeanu ◽  
Maria Daniela Stelescu
Keyword(s):  
Electron Beam ◽  
Water Absorption ◽  
Electron Beam Irradiation ◽  
Dose Range ◽  
Beam Irradiation ◽  
Equilibrium Sorption ◽  
Diffusion Parameters ◽  
Radiation Technique ◽  
Plasticized Starch ◽  
Degradation Degree

Rubber-based wastes represent challenges facing the global community. Human health protection and preservation of environmental quality are strong reasons to find more efficient methods to induce degradation of latex/rubber products in order to replace devulcanization, incineration, or simply storage, and electron beam irradiation is a promising method that can be can be taken into account. Polymeric composites based on natural rubber and plasticized starch in amounts of 10 to 50 phr, obtained by benzoyl peroxide cross-linking, were subjected to 5.5 MeV electron beam irradiation in order to induce degradation, in the dose range of 150 to 450 kGy. A qualitative study was conducted on the kinetics of water absorption in these composites in order to appreciate their degradation degree. The percentages of equilibrium sorption and mass loss after equilibrium sorption were found to be dependent on irradiation dose and amount of plasticized starch. The mechanism of water transport in composites was studied not only through the specific absorption and diffusion parameters but also by the evaluation of the diffusion, intrinsic diffusion, permeation, and absorption coefficients.

scholarly journals Influences of Electron Beam Irradiation on Mass of Water Absorption for Acryl Resin

2008 ◽  
Vol 72 (5) ◽  
pp. 366-370 ◽  
Author(s):  
Hironori Sato ◽  
Keisuke Iwata ◽  
Masae Kanda ◽  
Akira Tonegawa ◽  
Yoshitake Nishi
Keyword(s):  
Electron Beam ◽  
Water Absorption ◽  
Electron Beam Irradiation ◽  
Beam Irradiation

scholarly journals Influence of Sheet Electron Beam Irradiation with Low Potential on Water Absorption in Nylon6

2008 ◽  
Vol 72 (1) ◽  
pp. 35-38 ◽  
Author(s):  
Ryuichi Suenaga ◽  
Masae Kanda ◽  
Naoto Hironaka ◽  
Keisuke Iwata ◽  
Akira Tonegawa ◽  
...  
Keyword(s):  
Electron Beam ◽  
Water Absorption ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Sheet Electron Beam

Survival and Injury of Listeria monocytogenes, Listeria innocua and Listeria ivanovii in Ground Pork Following Electron Beam Irradiation†

1996 ◽  
Vol 59 (6) ◽  
pp. 596-600 ◽  
Author(s):  
R. RODRIGO TARTÉ ◽  
ELSA A. MURANO ◽  
DENNIS G. OLSON
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Dose Range ◽  
Listeria Innocua ◽  
Beam Irradiation ◽  
Listeria Ivanovii ◽  
Ground Pork ◽  
Radiation Resistant ◽  
Radiation Induced ◽  
Dose Levels

The sensitivity of five strains of Listeria to electron beam irradiation in ground pork as well as the extent of sublethal radiation injury exhibited by each were investigated. Ground pork was inoculated with one of five strains of Listeria and irradiated with from 0 to 1.25 kGy at 0.25 kGy intervals. Listeria innocua NADC 2841 was more radiation-resistant (D10 = 0.638 kGy) than L. monocytogenes NADC 2045 Scott A (D10 = 0.447 kGy), L. monocytogenes NADC 2783 (a hamburger isolate) (D10 = 0.424 kGy), L. monocytogenes ATCC 15313 (D10 = 0.445 kGy), and L. ivanovii NADC 3518 (D10 = 0.372 kGy), when recovered on tryptic soy agar supplemented with 0.6% yeast extract. D10 values for L. innocua, L. ivanovii, and L. monocytogenes ATCC 15313 were lower when cells were recovered on modified Oxford medium. These three strains were susceptible to radiation-induced sublethal injury, with the numbers of injured organisms increasing with irradiation dose. The two pathogenic strains of L. monocytogenes were not injured significantly at the dose levels used. The results show that the dose range currently being considered by the Food and Drug Administration for the irradiation of beef and pork (1.5 to 4.5 kGy) is adequate for the elimination of L. monocytogenes from pork.

scholarly journals Water Absorption Kinetics in Natural Rubber Composites Reinforced with Natural Fibers Processed by Electron Beam Irradiation

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2437
Author(s):  
Elena Manaila ◽  
Gabriela Craciun ◽  
Daniel Ighigeanu
Keyword(s):  
Diffusion Coefficient ◽  
Electron Beam ◽  
Natural Rubber ◽  
Water Absorption ◽  
Electron Beam Irradiation ◽  
Natural Fibers ◽  
Rubber Composites ◽  
Diffusion Parameters ◽  
Natural Rubber Composites ◽  
Kinetics Of

Natural rubber composites reinforced with hemp, flax, and wood sawdust were obtained by irradiation at room temperature with an electron beam of 5.5 MeV in order to meet the actual need for new materials that are environmentally friendly and safe for human health. The natural fibers loading was between 5 and 20 phr and the processing doses were between 75 and 600 kGy. The kinetics of water absorption in these materials were studied. The water diffusion was analyzed through Fick’s law. The water absorption parameters (Qt and Qeq), diffusion parameters (k and n), diffusion coefficient (D), intrinsic diffusion coefficient (D*), sorption coefficient (S), and permeation coefficient (P) have depended on the fiber nature, amount used in blends, and irradiation dose. The obtained results showed that not in the case of each type of fiber used, the water absorption could be correlated with the specific cellulose and hemicellulose content, due to the changes induced by the electron beam.

scholarly journals Hydrogel Based on Crosslinked Methylcellulose Prepared by Electron Beam Irradiation for Wound Dressing Application

2014 ◽  
Vol 14 (3) ◽  
pp. 262-268 ◽  
Author(s):  
Ambyah Suliwarno
Keyword(s):  
Molecular Weight ◽  
Tensile Strength ◽  
Electron Beam ◽  
Wound Dressing ◽  
Irradiation Dose ◽  
Electron Beam Irradiation ◽  
Dose Range ◽  
Swelling Ratio ◽  
Beam Irradiation ◽  
Gel Fraction

The aim of this research is to explore the possibility of methylcellulose polymer to be used as wound dressing material prepared using electron beam technique. The methylcellulose paste solution with various of molecular weight (SM-4, SM-100, SM-400, SM-4000 and SM-8000) at different concentration (15-30% w/v) were irradiated by using electron beam on the dose range of 10 kGy up to 40 kGy. Gel fraction and swelling ratio of hydrogels were determined gravimetrically. Tensile strength and elasticity of hydrogels were measured using a universal testing machine. It was found that with the increasing of irradiation dose from 10 up to 40 kGy, gel fraction and tensile strength were increased for all of hydrogels with various of molecular weight. On contrary, the swelling ratio of hydrogels decreased with increasing of irradiation dose. The optimum hydrogels elasticity were obtained from methylcellulose solution with the concentration range of 15-20% with irradiation dose of 20 kGy and showed excellent performance. The hydrogels based on methylcellulose prepared by electron beam irradiation can be considered for wound dressing material.

scholarly journals Electron beam irradiation influencing the mechanical properties and water absorption of polycaprolactam (PA6) and polyhexamethylene adipamide (PA66)

RSC Advances ◽  
2020 ◽  
Vol 10 (36) ◽  
pp. 21481-21486
Author(s):  
Juan Wang ◽  
Jianping Qiu ◽  
Siyi Xu ◽  
Jianxi Li ◽  
Liguo Shen
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Water Absorption ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Industrial Materials

It is known that polycaprolactam (PA6) and polyhexamethylene adipamide (PA66) are widely used industrial materials including in the irradiation industry.

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