Surface investigations of old book paper treated with hydroxyapatite nanoparticles

The SEM pictures for non-treated (up) and HAp treated paper (down). •A new restoration method for old book paper surface with hydroxyapatite nanoparticles in hydroalcoholic suspension.•Size measurement of synthesized HA nanoparticles.•Change in yellowness for treated paper with HA nanoparticles.•Inf...

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Bibliographic Details
Published in:Applied surface science 2013-11, Vol.285, p.27-32
Main Authors: Ion, Rodica-Mariana, Doncea, Sanda Maria, Ion, Mihaela-Lucia, Rădiţoiu, Valentin, Amăriuţei, Viorica
Format: Article
Language:English
Subjects:
Analytical techniques
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Historical paper
Hydroxyapatite
Paper surface investigation
Physics
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Summary:The SEM pictures for non-treated (up) and HAp treated paper (down). •A new restoration method for old book paper surface with hydroxyapatite nanoparticles in hydroalcoholic suspension.•Size measurement of synthesized HA nanoparticles.•Change in yellowness for treated paper with HA nanoparticles.•Influence of accelerated light aging on paper surface.•Induced stability of paper by pH changing from acid to basic range. Today, modern chemicals, as nanomaterials, are essential to preserve the world's artistic and cultural heritage. A new restoration method for old book paper restoration, based on a special hydroalcoholic suspension of hydroxyapatite nanoparticles, have been presented and discussed in this paper. This new method is based on the nanoparticles properties to penetrate into the materials network, to adhere to them, covering the damaged area and consolidating the damaged region. Several methods of instrumental chemical analysis have been employed: DLS, in order to determine the size of the synthesized nanoparticles and SEM, AFM spectral techniques to study the nanoparticles interaction with the paper support. Also, pH and change in yellowness of the restored surface have been evaluated, too. The influence of accelerated light aging has also been evaluated and discussed in this study, taking into acount that the aging of the document paper is an unavoidable process, difficult to study.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2013.07.159