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A method for deacidifying full-volume archives and books directly using ethylene oxide

A technology of ethylene oxide and archives, which is applied in the direction of waste paper post-processing, etc., to solve the bottleneck problem, not require high vacuum degree, and increase the effect of folding endurance and tensile strength

Active Publication Date: 2017-03-08
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing paper deacidification methods, and to provide a safe operation, low cost, and direct use of ethylene oxide to deacidify the entire volume of archives and the entire book under normal pressure conditions. Methods

Method used

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  • A method for deacidifying full-volume archives and books directly using ethylene oxide
  • A method for deacidifying full-volume archives and books directly using ethylene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put the whole book that needs deacidification treatment on the stainless steel frame after dedusting, and push it into a vacuum treatment box with a volume of 300 cubic decimeters. The whole book that needs deacidification treatment accounts for 70% of the volume of the vacuum treatment box. Close the chamber door, start heating after vacuuming, the temperature is controlled at 35°C, the humidity is set to 50%, and the vacuuming device is turned on so that the vacuum degree in the vacuum treatment box reaches 7mm Hg (atmospheric pressure is 726mm Hg), and stand for 20 Minutes, after the pressure no longer changes, then add 1.0g of liquid ethylene oxide per cubic decimeter according to the volume of the vacuum sealing device, that is, add 300g of liquid ethylene oxide, and the liquid ethylene oxide will quickly vaporize into ethylene oxide Alkanes gas, 35 ℃ deacidification treatment for 10 hours, pump out the ethylene oxide in the vacuum treatment box and carry out ultrav...

Embodiment 2

[0021] Put the whole book that needs deacidification treatment on the stainless steel frame after dedusting, and push it into a vacuum treatment box with a volume of 300 cubic decimeters. The whole book that needs deacidification treatment accounts for 70% of the volume of the vacuum treatment box. Close the chamber door, start heating after vacuuming, the temperature is controlled at 20°C, the humidity is set to 30%, and the vacuuming device is turned on so that the vacuum degree in the vacuum processing box reaches 7mm Hg (atmospheric pressure is 726mm Hg), and it is left to stand for 30 Minutes, after the pressure no longer changes, then add 1.5g of liquid ethylene oxide per cubic decimeter according to the volume of the vacuum sealing device, that is, add 450g of liquid ethylene oxide, and the liquid ethylene oxide will quickly vaporize into ethylene oxide Alkanes gas, 20 ℃ deacidification treatment for 20 hours, pump out the ethylene oxide in the vacuum treatment box and c...

Embodiment 3

[0023] Put the whole volume of archives that needs deacidification treatment on the stainless steel frame after dedusting, and push it into a vacuum treatment box with a volume of 300 cubic decimeters. The whole volume of archives that needs deacidification treatment accounts for 80% of the volume of the vacuum treatment box. Close the chamber door, start heating after vacuuming, the temperature is controlled at 55°C, the humidity is set at 60%, and the vacuuming device is turned on so that the vacuum degree in the vacuum processing box reaches 7mm Hg (atmospheric pressure is 726mm Hg), and it is left to stand for 10 Minutes, after the pressure no longer changes, then add 0.8g of liquid ethylene oxide per cubic decimeter according to the volume of the vacuum sealing device, that is, add 240g of liquid ethylene oxide, and the liquid ethylene oxide will quickly vaporize into ethylene oxide Alkanes gas, deacidification treatment at 55°C for 5 hours, pump out the ethylene oxide in ...

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Abstract

The invention discloses a method for deacidification of an entire volume of archive and a whole book directly with ethylene oxide. The method directly adopts ethylene oxide gas phase deacidification to realize direct deacidification of an entire volume of archive and a whole book. The whole deacidification process of the invention is basically conducted under an atmospheric condition, the method has the characteristics of safe operation, low requirement for vacuum degree and low cost, not only can deacidify acidic paper in the entire volume of archive and the whole book and make the pH value of the treated paper reach neutral and alkaline, but also does not cause yellowing of the alkaline paper in the entire volume of archive and the whole book, also can increase the folding endurance and tensile strength of alkaline paper, and the treated paper is difficult to lose water and can maintain for a long term, so that the aging resistance of the deacidified paper can be enhanced. The method provided by the invention has no influence to the handwriting on the paper, does not change the color and shape of the paper, cannot cause deformation of the archive and the book, and lefts no ethylene oxide on the paper, thus meeting the requirement of large-scale batch treatment.

Description

technical field [0001] The invention belongs to the technical field of cultural relics protection, and in particular relates to a method for directly using ethylene oxide to deacidify entire archives and entire books. Background technique [0002] The existence or accumulation of acid is the enemy of paper cultural relics preservation. The main component of paper itself, cellulose, is very stable in nature, but it is prone to hydrolysis under the catalysis of acid, which breaks the 1,4-β bond connecting glucose monomers, reduces the degree of polymerization of cellulose, and reduces the strength of paper. Yellowing, brittleness, deterioration and reduced toughness. Paper archives are the most precious cultural heritage of mankind, and the "self-destruction" phenomenon caused by acidification of paper has become a common problem facing the world. At present, to deacidify and strengthen the entire volume of archives and books, it is usually necessary to split the book into s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H25/18
Inventor 李玉虎赵光涛罗雨佳周亚军祁赟鹏张娟霍一娇王文军
Owner SHAANXI NORMAL UNIV
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