Preservation of photographic and cinematographic films by electron-beam irradiation
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2022
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INTERNATIONAL CONFERENCE ON ACCELERATORS FOR RESEARCH AND SUSTAINABLE DEVELOPMENT
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The Nuclear and Energy Research Institute – IPEN through the Multipurpose Gamma Irradiation
Facility and the Electron Beam Irradiation Facilities has disinfected several tangible cultural collections
from the University of São Paulo – USP. Brazilian weather conditions added to the actions of insects
and fungi promote biodegradation especially in cellulose-based materials. In this sense, ionizing
radiation is an excellent alternative to the traditional preservation process mainly because the biocidal
action. Electron beam irradiation also presents new possibilities for processing materials with greater
speed, despite having limited penetration. Adequate storage of photographic and cinematographic
materials is a challenge for experts from preservation institutions. Contamination by fungi is one of
leading causes of problem in this kind of collections. In addition, another common physicochemical
degradation affecting cellulose triacetate films causing deacetylation of polymer chain is called “vinegar
syndrome”. In this work are presented results of the effect of the electron beam irradiation on
photographic and cinematographic films using an electron beam accelerator with energy of 1.5 MeV
and beam power of 37.5 kW. Selected film samples were characterized by FTIR-ATR spectroscopy and
FEGSEM-EDS microscopy. Samples were irradiated with absorbed dose between 2 kGy and 200 kGy.
Irradiated samples were analyzed by UV-Vis spectrophotometry, FEGSEM, thermogravimetric
analysis (TG) and differential scanning calorimetry (DSC). Results showed that disinfection by electron
beam radiation can be achieved safely applying radiation absorbed doses between 6 kGy to 10 kGy with
no significant change or modification of main properties of the constitutive polymeric materials.
Electron beam irradiation, due to the effect of crosslinking is presented as an alternative to treat films
affected by “vinegar syndrome” applying absorbed dose of 80 kGy in order to increase shelf life of
cultural heritage materials.
Como referenciar
VASQUEZ, P.A.S.; NAGAI, M.L.E.; OLIVEIRA, M.J.A.; OTUBO, L.; SOMESSARI, E.S.R. Preservation of photographic and cinematographic films by electron-beam irradiation. In: INTERNATIONAL CONFERENCE ON ACCELERATORS FOR RESEARCH AND SUSTAINABLE DEVELOPMENT, May 23-27, 2022, Vienna, Austria. Abstract... Vienna, Austria: International Atomic Energy Agency - IAEA, 2022. Disponível em: http://repositorio.ipen.br/handle/123456789/33916. Acesso em: 19 Apr 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.