Vaterite-type calcium carbonate and aminopropyltriethoxysilane-modified cellulose nanofibrils for preservation of aged paper.

Deacidification and structural reinforcement are critically important for the long-term preservation of paper cultural relics. In this study, a novel approach is presented to synergistically combine highly reactive vaterite-type calcium carbonate with aminopropyltriethoxysilane-modified cellulose nanofibrils (NH-CNFs) for the restoration of aged paper. Employed as a deacidification agent, vaterite demonstrated superior efficacy at a low dosage in comparison with commercially available calcite-type calcium carbonate.