期刊
CARBOHYDRATE POLYMERS
卷 194, 期 -, 页码 161-169出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.04.020
关键词
Conservation; Restoration; Consolidation; Easel paintings; Cellulose nanofibrils (CNF); Cellulose nanocrystals (CNC)
资金
- Horizon European Union Framework Program for Research and Innovation [646063]
Nanocellulose has been recently proposed as a novel consolidant for historical papers. Its use for painting canvas consolidation, however, remains unexplored. Here, we show for the first time how different nanocelluloses, namely mechanically isolated cellulose nanofibrils (CNF), carboxymethylated cellulose nanofibrils (CCNF) and cellulose nanocrystals (CNC), act as a bio-based alternative to synthetic resins and other conventional canvas consolidants. Importantly, we demonstrate that compared to some traditional consolidants, all tested nanocelluloses provided reinforcement in the adequate elongation regime. CCNF showed the best consolidation per added weight; however, it had to be handled at very low solids content compared to other nanocelluloses, exposing canvases to larger water volumes. CNC reinforced the least per added weight but could be used in more concentrated suspensions, giving the strongest consolidation after an equivalent number of coatings. CNF performed between CNC and CCNF. All nanocelluloses showed better consolidation than lining with synthetic adhesive (Beva 371) and linen canvas in the elongation region of interest.
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