On the use of domestic nanodispersed cellulose in paper restoration

This paper describes the potential of using nanocellulose for restoration purposes, proposing effective methods for restoring paper documents. The paper discusses the properties and process of producing a nanosized cellulose fraction suitable for use in restoration. Nanocellulose, as a promising material, has a large specific surface area and is biodegradable and biocompatible. Pseudo-nanocellulose, obtained in laboratory conditions and used by us for restoration, is less energy-intensive to produce than true nanocellulose and consists of incompletely unwound microfibrils. This makes it an ideal candidate for restoration work that does not require large-scale production. A laboratory method for producing pseudo-nanocellulose is described, involving acid hydrolysis and ultrasonic treatment. The formation of a three-dimensional lattice of twisted nanocellulose fibers, which provides reinforcement for paper media, is described from a chemical physics perspective. The interpenetration of the pseudo-nanocellulose lattices and paper mechanically enhances the interaction between them, outperforming traditional synthetic consolidants. The practical feasibility of using nanocellulose for the restoration of paper-based documents is demonstrated. Pseudo-nanocellulose has been found to exhibit good adhesion to paper of various compositions and remains transparent on the paper after drying, without creating additional text obscuring. A pseudo-nanocellulose solution is shown to strengthen damaged paper with minimal visual changes, which is important for preserving the aesthetics of documents. The use of pseudo-nanocellulose simplifies the restoration of fragile, translucent documents with a high wood pulp content. Studies have shown increased fracture resistance and tensile strength after treatment with pseudo-nanocellulose.