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Method for reinforcing and deacidifying paper archives

A technology for paper archives and deacidification, which is used in the addition of anti-aging agents for paper, papermaking, textiles and papermaking, etc. It can solve the problems of the need for further improvement of the reinforcement effect and weak physical adhesion, so as to reduce the uneven deacidification. , Improve pH and mechanical strength, improve the effect of reinforcement

Inactive Publication Date: 2017-05-31
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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  • Method for reinforcing and deacidifying paper archives
  • Method for reinforcing and deacidifying paper archives
  • Method for reinforcing and deacidifying paper archives

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The papers in the archives of books and periodicals published by the People's Publishing House in 1966 are treated as objects. First, brush epichlorohydrin on the paper to make the paper completely wet, and then brush the hydroxypropyl methylcellulose-stabilized nano-magnesium hydroxide alcohol water dispersion, which is composed of hydroxypropyl methylcellulose aqueous solution and The nano-magnesium hydroxide ethanol dispersion is uniformly mixed at a volume ratio of 50:50, wherein the mass volume concentration of hydroxypropyl methylcellulose in the hydroxypropyl methylcellulose aqueous solution is 18.0g / L, and the nano-magnesium hydroxide ethanol The mass volume concentration of nano magnesium hydroxide in the dispersion liquid is 8.0g / L. Then the paper is dried in an oven at 50° C. for 1 hour to complete the strengthening and deacidification of the paper.

[0026] Untreated archival paper and reinforced deacidified archival paper are as follows: figure 1 and 2 A...

Embodiment 2

[0032]The papers in the book archive "Shi Fang Ge Kuo" published by the Commercial Printing House in 1905 were treated as objects. First, apply epichlorohydrin on the paper to make the paper completely wet, and then apply methyl cellulose-stabilized nano-calcium hydroxide alcohol aqueous dispersion, which is composed of methyl cellulose aqueous solution and nano-calcium hydroxide isopropyl The alcohol dispersion is uniformly mixed at a volume ratio of 40:60, wherein the mass volume concentration of methyl cellulose in the methyl cellulose aqueous solution is 20.0g / L, and the concentration of nano calcium hydroxide in the isopropanol dispersion of nano calcium hydroxide is The mass volume concentration is 8.0g / L. Then the paper is dried in an oven at 60° C. for 1 hour to complete the strengthening and deacidification of the paper. Table 2 shows the pH and mechanical properties of the paper samples before and after the reinforcement and deacidification treatment and after 10 da...

Embodiment 3

[0036] The papers in the book archive "Red Flag" published by People's Publishing House in 1979 were treated as objects. First, spray epichlorohydrin on the paper to make the paper completely wet, and then brush the hydroxyethyl cellulose-stabilized nano-barium hydroxide alcohol aqueous dispersion, which is composed of hydroxyethyl cellulose aqueous solution and nano-barium hydroxide ethanol The dispersion liquid is uniformly mixed according to the volume ratio of 50:50, wherein the mass volume concentration of hydroxyethyl fiber in the hydroxyethyl fiber aqueous solution is 19.0g / L, and the mass volume concentration of nano barium hydroxide in the ethanol dispersion of nano barium hydroxide The concentration is 7.5g / L. Then the paper is dried in an oven at 50° C. for 1 hour to complete the strengthening and deacidification of the paper. Table 3 shows the pH and mechanical properties of the samples before and after the paper sample was strengthened and deacidified and after 1...

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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 water dispersion stabilized by epichlorohydrin crosslinked cellulose ether. Background technique [0002] The main component of paper is cellulose, which is an important carrier of human culture and civilization. During the long-term storage of paper archives, the acidic products of their own cellulose degradation, or acidic additives (alum, etc.) The proton self-catalytic degradation of paper fibers reduces the degree of polymerization of paper fibers, destroys the structure of paper, and finally makes paper disappear. Deacidification is a key link in the restoration and preservation of paper archives. [0003] Currently commonly used paper deacidifiers include ammonia or amine-containing organic compounds, alkyl metal compounds,...

Claims

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Application Information

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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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