Effects of γ-ray treatment on paper

Coppola, Floriana; Fiorillo, Flavia; Modelli, Alberto; Montanari, M; Vandini, Mariangela

doi:10.1016/j.polymdegradstab.2018.02.004

Cited by 14 publications

(8 citation statements)

References 18 publications

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“…Comparison between the FTIR spectra of non-irradiated and irradiated samples does not show evident variations in the relative intensities of the spectral features in the 4000-500 cm −1 range, in agreement with the observations of Coppola et al [8]. Based on these results it can be concluded that the modification took place after activation by γ-irradiation and vegetable oils modification.…”

Section: Discussionsupporting

confidence: 91%

Extended Food Shelf-Life via Gamma Irradiation Modified Kraft Paper

Irimia¹,

Enache

2020

Proceedings of the First International Conference on “Green” Polymer Materials 2020

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Cellulose, the main constituent of paper-based food packages, is a favorable substrate for fungal growth. Gamma irradiation is a well-established low-cost treatment used for decontamination of paper objects. The dose rate plays an important role in the efficacy of the radiation treatment, but further chemical treatment is also important for imparting specific properties for food packaging applications. The aim of this study is to evaluate the influence of γradiation dose and bioactive compounds grafting on appearance, structure and properties of two cellulosic substrates: unbleached and bleached Kraft cellulose paper. In this sense, Kraft paper has been activated using gamma irradiation treatment and grafted with two bioactive compounds, namely clove oil and rosehip seed oil. The experimental results showed that: (a) no significant changes of the irradiated samples took place, which prove a good durability; (b) the morphological and structural changes took place after modification with bioactive compounds, imprinting antimicrobial and antioxidant properties to modified substrates; (c) the modified materials extended the shelf-life of tested aliments, indicating that the new obtained materials are suitable for food packaging applications.

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Section: Discussionsupporting

confidence: 91%

Extended Food Shelf-Life via Gamma Irradiation Modified Kraft Paper

Irimia¹,

Enache

2020

Proceedings of the First International Conference on “Green” Polymer Materials 2020

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“…Gamma rays have higher penetrating power compared to alpha and beta. As with other disinfectant treatments, irradiation has the preferred perspective that it does not leave the unsafe building on the material handled [6].…”

Section: Radiation Exposure On Magnetic Paper Productionmentioning

confidence: 99%

Magnetic Sugarcane Bagasse Paper Via Radiation Method- A Short Review

2021

BJoST

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The global demand for wood fibre has increased due to the increasing population and new applications throughout the world. To supplement the limited wood fibre resources, non-wood fibres, especially sugarcane bagasse, have been introduced as alternatives in paper-based industries. This study addresses the analysis of magnetic sugarcane bagasse materials as substitute fibres in papermaking. Paper is generally made with cellulose fibre which has some specific educational, packaging and cleaning purposes. Sugarcane bagasse (Saccarhum officinarum) is a remaining residue left broken for sugar extraction. It is considerably popular for its cellulose, holocellulose, alpha-cellulose, and lignin that far more convenient than wood fibres. Meanwhile, demands for magnetic material in magnetic papermaking production have increased due to its excellent mechanical characteristics, low cost, and recyclability. The magnetic paper shows some superiority in properties such as renewable use and folding resistance. The introduction of filler in this study is to alter the paper properties such as texture, opacity, brightness, dimensional stability, ink absorbency, and overall printability. Nowadays, the requirement for fillers is to provide explicit upgrades to the quality of the sheets. Thus, a cobalt ferrite (CoFe₂O₄) magnet as a filler can enhance the paper's properties. Cobalt ferrite is a hard-magnetic material with distinct properties such as good mechanical hardness and chemical stability. Therefore it is a much more suitable material for magnetic paper production. The integrity of the paper may decrease due to the presence of bacteria and fungi. Therefore, to increase the paper's integrity, the irradiation process by using gamma-ray can be done to the paper to avoid fungi and bacteria that can degrade the quality of the paper caused by spots and stains.

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“…For this reason, in the present research we have studied the effectiveness of recovery processes in the short and long-term, both through standard cultivation and ATP assay. Related data on the physico-chemical side effects of the same processes on model paper are reported in a correlated study (Coppola et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…On the other side, if we consider many other mechanical and chemical parameters, such as traction, folding, macrostructure morphology, colour changes, and spectroscopy responses (FTIR and Raman techniques), the majority of the studies report no or low side effect at dosage <10 kGy even after ageing (Adamo et al 2001;Coppola et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Mass Treatment of Flooded Archival Materials by Gamma Radiation

Montanari

Pipponzi

Livi³

2021

Restaurator. International Journal for the Preservation of Library and Archival Material

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This work describes mass recovery processes of flooded archival materials at industrial scale. The presence of fungi on paper represents a threat to the integrity of the document because they degrade cellulose, one of the main components of paper. Gamma radiation treatments are investigated as mass disinfection agents for their high penetrating power, speed of treatment, and absence of risk due to chemical residuals. We compared two different recovery processes: thermal drying followed by gamma irradiation and gamma irradiation followed by thermal drying. Both these processes were conducted simultaneously on naturally contaminated archival items and on paper specimens artificially contaminated with species test. Efficacy was assessed by culture method and ATP assay, right after the treatments and after four years of storage at room temperature. Coupling gamma irradiation with a drying step with dry heat at 55–60 °C reduces the fungal loads on natural items up to levels close to the detection limits, and the reduction is maintained after four years. On artificial specimens, spore germination is completely inhibited, mycelia growth is also highly affected, but the melanised test species appear to be more resistant. A synergistic effect between gamma irradiation, water content, and thermal drying is highlighted in this paper.

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Effects of γ-ray treatment on paper

Cited by 14 publications

References 18 publications

Extended Food Shelf-Life via Gamma Irradiation Modified Kraft Paper

Extended Food Shelf-Life via Gamma Irradiation Modified Kraft Paper

Magnetic Sugarcane Bagasse Paper Via Radiation Method- A Short Review

Mass Treatment of Flooded Archival Materials by Gamma Radiation

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