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Keywords = large-scale deacidification

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14 pages, 3885 KiB  
Article
Application of Ethylene Oxide Gas and Argon Gas Mixture System Method for Scale Deacidification of Cellulose-Based Cultural Heritage Collections
by Yunpeng Qi, Zhihui Jia, Yajun Zhou, Yong Wang, Guangtao Zhao, Xiaolian Chao, Huiping Xing and Yuhu Li
Coatings 2021, 11(8), 973; https://doi.org/10.3390/coatings11080973 - 16 Aug 2021
Cited by 4 | Viewed by 2662
Abstract
Deacidification plays an important role in the conservation of paper-based cultural heritage objects. Herein, a novel approach for the conservation of scale paper-based cultural heritage objects is proposed using a mixture of argon and ethylene oxide (EO-Ar) for the first time. The optimum [...] Read more.
Deacidification plays an important role in the conservation of paper-based cultural heritage objects. Herein, a novel approach for the conservation of scale paper-based cultural heritage objects is proposed using a mixture of argon and ethylene oxide (EO-Ar) for the first time. The optimum process conditions for deacidification of ethylene oxide and argon mixture system are determined by orthogonal testing. To evaluate the stabilization effect of paper treated with EO-Ar, the degradation of the mechanical properties (tensile strength, folding endurance and tearing strength tests) of paper after artificial aging was evaluated. The results show that the treated paper had better durability with respect to tensile strength, folding endurance and tearing strength. Additionally, thermal stability, crystallinity and fiber wall thickness increased after EO-Ar treated, which was determined by scanning electron microscope (SEM), diffraction of X-rays (XRD), and thermo gravimetric (TG) analysis. Some compounds, such as polyethylene glycol, organic acids, esters, were detected by GC-MS after treatment with EO-Ar. Two hundred and forty books including acidic, weak acidic and alkaline books were successfully deacidified, resulting in pH values of paper ranges suitable for paper preservation. Finally, a possible mechanism of deacidification of EO-Ar was proposed. Full article
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16 pages, 6660 KiB  
Article
Sustainable Nanotechnologies for Curative and Preventive Wood Deacidification Treatments: An Eco-Friendly and Innovative Approach
by Giuliana Taglieri, Valeria Daniele, Ludovico Macera, Ralf Schweins, Sandro Zorzi, Marie Capron, Gilles Chaumat and Claudia Mondelli
Nanomaterials 2020, 10(9), 1744; https://doi.org/10.3390/nano10091744 - 3 Sep 2020
Cited by 11 | Viewed by 4827
Abstract
Waterlogged wooden artifacts represent an important historical legacy of our past. They are very fragile, especially due to the severe phenomenon of acidification that may occur in the presence of acid precursors. To date, a satisfactory solution for the deacidification of ancient wood [...] Read more.
Waterlogged wooden artifacts represent an important historical legacy of our past. They are very fragile, especially due to the severe phenomenon of acidification that may occur in the presence of acid precursors. To date, a satisfactory solution for the deacidification of ancient wood on a large scale has still not been found. In this paper, we propose, for the first time, eco-friendly curative and preventive treatments using nanoparticles (NPs) of earth alkaline hydroxides dispersed in water and produced on a large scale. We present the characterization of the NPs (by X-ray diffraction, atomic-force and electron microscopy, and small-angle neutron scattering), together with the study of the deacidification efficiency of our treatments. We demonstrate that all our treatments are very effective for both curative and preventive aims, able to assure an almost neutral or slightly alkaline pH of the treated woods. Furthermore, the use of water as a solvent paves the way for large-scale and eco-friendly applications which avoid substances that are harmful for the environment and for human health. Full article
(This article belongs to the Section Inorganic Materials and Metal-Organic Frameworks)
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