A method for strengthening and deacidifying paper archives

A technology for paper archives and deacidification, which is applied in the direction of adding anti-aging agent for paper, papermaking, textiles and papermaking, etc. It can solve the problems that the reinforcement effect needs to be further improved and the physical adhesion force is weak, so as to reduce the unevenness of deacidification , improve pH and mechanical strength, and improve the effect of reinforcement

Inactive Publication Date: 2018-12-28
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used reinforcement materials mainly include gelatin or cellulose ether. These long-chain polymers are physically filled between the fiber bundles of paper archives to achieve paper reinforcement. However, this physical adhesion is weak, and the reinforcement effect remains to be seen. Further improvement, and this reinforcement itself has no deacidification effect

Method used

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  • A method for strengthening and deacidifying paper archives
  • A method for strengthening and deacidifying paper archives
  • A method for strengthening and deacidifying paper archives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The paper in the archives of books and periodicals published by People's Publishing House in 1966 is the processing object. First, apply epichlorohydrin to the paper to completely wet the paper, and then apply the hydroxypropyl methylcellulose stabilized nano-magnesium hydroxide aqueous dispersion, which is composed of hydroxypropyl methyl cellulose aqueous solution and The nano-magnesium hydroxide ethanol dispersion is uniformly mixed in a volume ratio of 50:50, and the mass volume concentration of hydroxypropyl methyl cellulose in the hydroxypropyl methyl fiber aqueous solution is 18.0 g / L, and the nano-magnesium hydroxide ethanol The mass volume concentration of nano-magnesium hydroxide in the dispersion is 8.0 g / L. Then the paper is placed in an oven at 50°C and dried for 1 hour to complete the reinforcement and deacidification of the paper.

[0026] The difference between untreated archival paper and reinforced deacidified archival paper figure 1 with 2 As shown in t...

Embodiment 2

[0032] The paper in the book "Shifang Gekuo" published by the Commercial Printing House in 1905 was used as the processing object. First, apply epichlorohydrin to the paper to completely wet the paper, and then apply the methylcellulose stabilized nano-calcium hydroxide aqueous dispersion, which is composed of methyl fiber aqueous solution and nano-calcium hydroxide isopropyl The alcohol dispersion is uniformly mixed according to the volume ratio of 40:60, wherein the mass volume concentration of methyl cellulose in the methyl fiber aqueous solution is 20.0 g / L, and the nano calcium hydroxide in the nano calcium hydroxide isopropanol dispersion is The mass volume concentration is 8.0g / L. Then the paper is placed in an oven at 60°C for 1 hour to dry the paper to complete the reinforcement and deacidification of the paper. Table 2 shows the pH and mechanical properties of the paper sample before and after the reinforcement and deacidification treatment and the relevant paper sam...

Embodiment 3

[0036] The paper in the book "Red Flag" published by People's Publishing House in 1979 is the processing object. First spray epichlorohydrin on the paper to completely wet the paper, and then apply the hydroxyethyl cellulose stabilized nano barium hydroxide alcohol aqueous dispersion, which is composed of hydroxyethyl fiber aqueous solution and nano barium hydroxide ethanol The dispersion liquid is uniformly mixed in a volume ratio of 50:50, wherein the mass volume concentration of hydroxyethyl fiber in the hydroxyethyl fiber aqueous solution is 19.0 g / L, and the mass volume of nano barium hydroxide in the nano barium hydroxide ethanol dispersion liquid The concentration is 7.5g / L. Then the paper is placed in an oven at 50°C and dried for 1 hour to complete the reinforcement and deacidification of the paper. Table 3 shows the pH and mechanical properties of the paper sample before and after the deacidification treatment and the relevant paper sample after artificial aging for ...

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PUM

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Abstract

The invention discloses a method for reinforcing and deacidifying paper archives. The method comprises the steps of brushing or spraying epoxy chloropropane to to-be-processed paper archives, brushing or spraying cellulose ether stabilized nano-alkaline earth metal hydroxide alcohol-water dispersion liquid, and drying, so as to finish the reinforcement and deacidification of the paper archives; by utilizing an alkaline earth metal hydroxide, the acidy paper archives are neutralized, cross-linking reaction among epoxy chloropropane, paper fibers and cellulose ether is catalyzed under an alkaline condition, cellulose ether which is lined with chemical bonds of the paper fibers and has a cross-linked net structure is formed, and thus the paper archives are reinforced; and the cellulose ether stabilized nano-alkaline earth metal hydroxide is uniformly dispersed into the paper fibers, so that the paper archives are simultaneously reinforced and deacidified. The method has the beneficial effects that the operation is simple, the colors and prints of the acidified paper archives are not obviously influenced, the pH and mechanical strength of the paper archives are remarkably increased, and the durability of the paper archives is improved.

Description

Technical field [0001] The invention belongs to the technical field of paper archives protection, and in particular relates to a method for strengthening and deacidifying acidified paper archives with a nano alkaline earth metal hydroxide alcohol aqueous dispersion stabilized by epichlorohydrin cross-linked cellulose ether. Background technique [0002] The main component of paper is cellulose, which is an important carrier of human culture and civilization. In the long-term storage process of paper archives, the acid products of its own cellulose degradation, the acid additives (alum, etc.) in the papermaking process, or the introduction of acid gases such as nitrogen and sulfur oxides in the storage environment will acidify the paper, thereby causing The protons of paper fibers are degraded by autocatalysis, reducing the degree of polymerization of paper fibers, destroying the structure of the paper, and finally making the paper disappear. Deacidification is a key link in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/14
CPCD21H21/143
Inventor 胡道道梁兴唐凡晓宇李润梅苏凤宇王兰
Owner SHAANXI NORMAL UNIV
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