Preparation and application in the paper protection of carboxymethyl cellulose grafted with β-cyclodextrin

As a cultural carrier of historical inheritance, paper has high cultural, historical and scientific research value. But with the passage of time and the change of the environment, many paper are aging and damaged. In order to protect the paper, CMC-beta-CD composite material for paper protection was synthesized by carboxymethyl cellulose as substrate, epichlorohydrin (ECH) as crosslinking agent, sodium hydroxide (NaOH) as catalyst and solvent, and water as medium, beta-cyclodextrin as grafter. Through single factor experiment, the synthetic condition was obtained. The structure of the synthesized materials was characterized by infrared spectroscopy; CMC-beta-CD was applied to paper reinforcement. The effects of solution concentration on the tensile strength, tearing degree, folding times, whiteness and gloss of paper were tested, and the suitable conditions for coating paper were found. The results show that the mass concentration of 2 % CMC-beta-CD is coated on paper, its mechanical properties are greatly improved, the gloss is slightly increased, and the whiteness is basically unchanged, which is in line with the principle of "repairing the old as the old".