A novel paper multifunctional protective solution was prepared by mixing berberine modified trimethoprimed carboxymethyl cellulose (TMP-DCMC-BBR), KH-791 modified nano-SiO 2 (KH791-SiO 2 ) and hydroxypropyl starch phosphate (HPDSP), and the mechanical properties, optical properties, antibacterial properties, aging resistance, acid and alkali resistance of the paper coated with the protective solution were investigated. It is shown that the paper coated with the multifunctional protective liquid showed good mechanical properties, and has little influence on optical properties of the paper. At the same time, it had good antibacterial properties, aging resistance and acid and alkali corrosion resistance, and there is no obvious change in paper appearance, no decolorization and ink diffusion, which is in line with the principle of “repairing the old as the old and keeping the original appearance”. Moreover, the compound solution has certain reversibility and can absorb a certain degree of ultraviolet rays, so as to weaken the damage of ultraviolet rays to the paper. It is an ideal multifunctional protective liquid for paper and has broad application prospects in paper protection.
As the main carrier of art and cultural heritages, paper cultural relics are suffering from aging, oxidation, acidification, bacterial corrosion and other diseases with the passage of storage time. Therefore, it is of great significance to carry out the protection of paper cultural relics. In order to improve the bacteriostatic properties, mechanical strength and delay aging of paper, sodium carboxymethyl cellulose was modified by berberine and prepare berberylated carboxymethyl cellulose (BBR-DCMC), which is mixed with KH-791 modified nano-silica and hydroxypropyl distarch phosphate to prepare a multifunctional protective liquid integrating deacidification, reinforcement and antibacterial. The paper coated with the multifunctional protective liquid showed better antibacterial and mechanical properties, and the gloss and whiteness changed slightly. The aging test and the acid and alkali resistance test showed that the paper had certain aging resistance and acid and alkali corrosion resistance. It is an ideal protective agent for paper cultural relics and has broad application prospects in paper protection.
Xuemei Wang,Yingping Qi,Fan Wu,Yongfeng Shen,Duanhui Gao,Hua Li
Paper has a high value of culture, history and scientific research as the cultural carrier of historical inheritance. However, with the passage of time and the change of environment, many paper files are aging and damaged. Therefore, it is of great significance to carry out the protection of paper archives. Chitosan, a natural material, has a good compatibility with paper fibers. In this paper, chitosan (CS) was modified by epoxy cyclohexane (CHO) and methyl methacrylate (MMA) to prepare CS-CHO-g-PMMA emulsion. CS-CHO-g-PMMA was applied to paper protection, and the effects of CS-CHO-g-PMMA on heat aging resistance, reversibility and acid-base resistance were investigated. In order to improve the mechanical strength of paper, CS-CHO-g-PMMA and phosphate ester starch (HPDSP) were blended to determine the optimum ratio. The results showed that the degradation rate of paper sample was slowed down obviously and the coating had certain reversibility. Acid-base resistance experiment showed that CS-CHO-g-PMMA could effectively resisit corrosion of external acid-base to protect the paper. The best combination ratio between CS-CHO-g-PMMA and HPDSP was: m (CS-CHO-g-PMMA): m (HPDSP) = 5:2. Under this compound ratio, the performance indexes of the paper met the requirements, conforming to the “repair as old, keep the original” and other requirements.
危险品化学品经营许可证（带存储）