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Article Dans Une Revue Journal of Cultural Heritage Année : 2024

Iron(III) based Metal-Organic Frameworks in cellulose acetate film preservation: Fundamental aspects and first application

Luigi Ranza
  • Fonction : Auteur
Artur Neves
Juan Ignacio Lahoz Rodrigo
  • Fonction : Auteur
Nadja Wallaszkovits
  • Fonction : Auteur
Christian Serre

Résumé

Low-temperature storage to slow down degradation is accepted by the film conservation community. Still, this solution prohibits public access, is price-sensitive, has high energy costs, and there are concerns about their effects on the physical stability and material lifetime. In this research, a smart solution is developed based on the selective capture of acetic acid produced by the cellulose acetate polymer. This innovative approach is based on Metal-Organic Frameworks (MOFs) for acetic acid adsorption, specifically a highly selective porous iron(III) based MOF, MIL-100(Fe), which was synthesized using a green approach. The stability of MIL-100(Fe), under acetic acid exposure, was demonstrated by accelerated aging experiments, with no noticeable changes in crystallinity and/or porosity as deduced from powder X-ray diffraction analysis, infrared spectroscopy, thermogravimetric analysis, nitrogen porosimetry, and electron microscopy. Compatibility tests with the artefacts were performed to prove the safety of the MIL-100(Fe) to the artefacts. A field application in a demonstration prototype (smart box) was performed at Institut Valencià de Cultura. A recently developed hybrid model provided recommendations on the quantity of adsorbents to use in the smart box. Good agreement was observed between the model predictions and the in-field experimental results, which validated the model application. The model predicted that the new adsorbent (5% of the film's weight, replaced every 10 years, at 16°C or 22°C) extends the film's lifetime equivalently to cold storage (5°C). Finally, environmental impact assessment and life cycle analysis were performed to compare the two preservation approaches. The new approach based on this Fe-MOF yielded an average reduction of carbon footprint related to movie film preservation of about 50% considering the current European Union (EU) energy mix and about 40% considering the 2030 EU energy mix (where a transition towards renewable energy is expected). The proposed innovative technology represents a robust solution towards efficient and more sustainable film preservation while significantly contributing to moving toward climate transition objectives in the culture heritage sector.
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Dates et versions

hal-04370745 , version 1 (03-01-2024)

Identifiants

Citer

Abeer Al Mohtar, Maria Inês Severino, Pierre Tignol, Luigi Ranza, Artur Neves, et al.. Iron(III) based Metal-Organic Frameworks in cellulose acetate film preservation: Fundamental aspects and first application. Journal of Cultural Heritage, 2024, 66 (1), pp.236-243. ⟨10.1016/j.culher.2023.11.013⟩. ⟨hal-04370745⟩
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