Combined Nanocellulose/Nanosilica Approach for Multiscale Consolidation of Painting Canvases
Journal article, 2018

The restoration of painting canvases is a complex problem that, because of the hierarchical nature of the canvas, requires intervention at several length scales. We propose an approach combining polyelectrolyte-treated silica nanoparticles (SNP) and cellulose nanofibrils (CNF) for canvas consolidation. The formulations, applied on model degraded canvases, gave a total weight increase of <5 wt %. Scanning electron microscopy and micro-X-ray fluorescence measurements were used for determining the component distribution across the canvas depth, while tensile testing demonstrated the mechanical efficiency of the consolidation. CNF formed a film at the canvas surface that increased the ductility. SNP penetrated deeper and reinforced at the fiber scale, yielding higher stiffness. The two effects could be balanced by varying the SNP/CNF ratio a suitable reinforcement. This approach offers an alternative to the conventional treatments based on e.g., relining with a new canvas or application of synthetic film-forming compounds.

cellulose nanofibrils

silica nanoparticles

canvas

conservation

restoration

Author

Krzysztof Kolman

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Oleksandr Nechyporchuk

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Michael Persson

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Akzo Nobel - Pulp and Performance Chemicals

Krister Holmberg

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Romain Bordes

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

ACS Applied Nano Materials

25740970 (eISSN)

Vol. 1 5 2036-2044

Subject Categories

Polymer Chemistry

Paper, Pulp and Fiber Technology

Polymer Technologies

DOI

10.1021/acsanm.8b00262

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7/5/2024 1