Radiation application for paper preservation: gamma irradiation at eucalyptus pulp sheets
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Data
Data de publicação:
2009
Autores IPEN
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1st
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Resumo
Ionizing radiation has been proposed in order to protect information and books that may be
lost due to fungi and or insects infestation. In general restaurators are very worried about the
maintenance of original properties of items to be treated. The selected technology must
consider two points: type of biological contamination and contamination control. Fungi is one
of the principal organism which grows well on papers. Once this infestation is installed on the
paper it will signify spots, resistance loses and deterioration. The organisms feces introduces
enzymes, organic acids and pigments to the contaminated material. Ionizing radiation from
gamma sources were applied at laboratory sheets manufactured with commercial cellulose
pulp. The subject of this present paper was to investigate the ideal radiation dose that is safe
for keeping the paper quality. Laboratory sheets (75 g/m2
) were prepared in a TAPPI sheet
former. Bleached sulphate Eucalyptus pulp, refined in laboratory PFI mill to 31°SR, was the
raw material. The formed sheets were irradiated at IPEN’s 60Co Gammacell with 3 kGy up to
25 kGy. No significant changes were detected in paper samples irradiated up to 9 kGy. This
is the radiation dose to be suggested. During irradiation the applied dose rate was 0.817 Gy/s.
Como referenciar
BORRELY, SUELI I.; BARBOSA, PATRICIA S.M.; ALMEIDA, MARIA L.O.D. Radiation application for paper preservation: gamma irradiation at eucalyptus pulp sheets. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1st, September 27 - October 2, 2009, Rio de Janeiro, RJ. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/11966. Acesso em: 04 Jul 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.