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EUROINVENT 2013
38.2
Title
Composition and Treatment Procedure with
Hydroxyapatite Nanoparticles for Chemical Restoration
and Biological Desinfection of Historical Paper’s Surface
Rodica-Mariana Ion, Sanda Maria Doncea
ICECHIM, Bucharest
Authors
Institution
Patent no. RO126570 (A2) / 2012
Description
Class
The present invention deals with a treatment method, a chemical
restoration and biological disinfection of the degraded historical
paper surface using hydroxyapatite nanoparticles suspension in
alcoholic solution. It is shown both the nanoparticles suspension
preparation and the device and spraying method of this suspension
on the paper undergone. Some details about the chemical and
biological composition of the paper samples, before and after
treatment are evaluated, too.
The novelty and the advantages offered by this invention are:
• the application of hydroxyapatite nanoparticles
suspension prepared in the laboratory and sprayed on the
surface of damaged paper;
• the treated paper is left to dry in air, at room temperature,
in order to allow the interaction between the powdered
nanoparticles and the degraded cellulose fibres gaining
consistency and strength.
• hydroxyapatite nanoparticles are less aggresive;
• the method shows minor disadvantages in terms of used
solvent (isopropanol, environment friendly solvent (Wei
t'O method uses CFC (chlorofluorocarbon = freon);
• the treatment is simple and requires no special equipment;
• the treatment with hydroxyapatite nanoparticles of the
paper allows concomitantly chemical restoration and
biological disinfection (inactivation of fungi
Aspergillus şi Penicillium classes.
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