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A gas-phase deacidification and strengthening method for paper cultural relics

A paper cultural relic, gas phase technology, applied in the post-processing of waste paper, etc., can solve the problem of limited improvement, and achieve the effect of preventing paper deformation, avoiding shrinkage deformation, and prolonging life.

Active Publication Date: 2020-10-09
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can improve the paper strength performance after deacidification, the improvement range is very limited.

Method used

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  • A gas-phase deacidification and strengthening method for paper cultural relics
  • A gas-phase deacidification and strengthening method for paper cultural relics
  • A gas-phase deacidification and strengthening method for paper cultural relics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) The paper to be treated (taken from the book "Kingui Gangyao", the first edition in February 1959-the first printing, published by People's Health Publishing House) is brushed with a tartaric acid solution of pH=2.37 After that, put it in an oven to dry at 60°C for later use, so as to simulate the aging and acidification of paper;

[0038] (2) Lay the simulated acidified paper into a desiccator of appropriate size, and then put a plastic test tube with a capacity of about 25mL of ammonia into the desiccator; seal the desiccator and vacuumize it to maintain The pressure of the system is 0.01±0.005MPa, put the vacuumed dryer into the blast drying oven, set the temperature at 25°C (room temperature), and make the vaporized ammonia water contact and react with the paper for 30min;

[0039](3) After the reaction is over, the desiccator is taken out from the blast drying oven, and after the desiccator is connected to the atmosphere, the desiccator is opened to take out th...

Embodiment 2

[0042] (1) The paper to be treated (taken from the book "Kingui Gangyao", the first edition in February 1959-the first printing, published by People's Health Publishing House) is brushed with a tartaric acid solution of pH=2.37 After that, put it in an oven to dry at 60°C for later use, so as to simulate the aging and acidification of paper;

[0043] (2) Lay the simulated acidified paper into a desiccator of appropriate size, and then put a plastic test tube with a capacity of about 25mL of ammonia into the desiccator; seal the desiccator and vacuumize it to maintain The pressure of the system is 0.01±0.005MPa, put the vacuumed dryer into the blast drying oven, set the temperature at 25°C (room temperature), and make the vaporized ammonia water contact and react with the paper for 30min;

[0044] (3) After the reaction is over, take the desiccator out of the blast drying oven, connect the desiccator to the atmosphere, open the desiccator and take out the plastic test tube cont...

Embodiment 3

[0047] (1) The paper to be treated (taken from the book "Kingui Gangyao", the first edition in February 1959-the first printing, published by People's Health Publishing House) is brushed with a tartaric acid solution of pH=2.37 After that, put it in an oven to dry at 60°C for later use, so as to simulate the aging and acidification of paper;

[0048] (2) Lay the simulated acidified paper into a desiccator of appropriate size, and then put a plastic test tube with a capacity of about 25mL of ammonia into the desiccator; seal the desiccator and vacuumize it to maintain The pressure of the system is 0.01±0.005MPa, put the vacuumed dryer into the blast drying oven, set the temperature at 25°C (room temperature), and make the vaporized ammonia water contact and react with the paper for 30min;

[0049] (3) After the reaction is over, take the desiccator out of the blast drying oven, connect the desiccator to the atmosphere, open the desiccator and take out the plastic test tube cont...

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Abstract

The invention discloses a gas phase depickling reinforcing method of paper-based historical relics. The gas phase depickling reinforcing method of paper-based historical relics comprises following steps: paper-based historical relics to be processed and a depickling reagent are introduced into a sealed device, sealing and vacuum pumping are carried out to maintain the pressure in the system to be negative; the paper-based historical relics are subjected to depickling processing and reinforcing processing respectively in the presence of depickling reagent steam and reinforcing reagent steam; wherein the depickling reagent is one or a mixture of a plurality of components selected from ammoniacal liquor, small molecular organic amine with a molecular weight of 200 or lower and a solution of the small molecular organic amine, or a liquid state organic amine with a boiling point of 200 DEG C or lower or a solution of the liquid stage organic amine. In the processing process, no solvent is used, so that problems in the prior art that in liquid phase depickling treatment of paper-based historical relics, paper shrinkage deformation, and handwriting blooming fading are caused are solved; secondary damage caused by paper adhesion in liquid phase depickling restoration is avoided; depickling effect is obvious; conglobated polymer particles used for coating paper fiber are formed on paper surfaces through reaction grafting, so that excellent mechanical performance is achieved, reinforcing effect is achieved, and the life of paper-based historical relics is prolonged.

Description

technical field [0001] The invention belongs to the technical field of ancient book protection. More specifically, it relates to a gas-phase deacidification strengthening method for paper cultural relics. Background technique [0002] Paper cultural relics play an extremely important role in the dissemination and inheritance of civilization. As time goes by, precious ancient books and rare books and other paper documents are aging, yellowing or even breaking into paper scraps to varying degrees. Since paper itself is mainly composed of cellulose, the essence of paper aging is that cellulose undergoes acidic degradation and oxidative degradation reactions, resulting in the breakage of cellulose molecular chains, and the acid in paper will accelerate the degradation of cellulose. After the cellulose is hydrolyzed, the strength of the paper also decreases due to the decrease in the degree of polymerization. When the degree of polymerization of the cellulose drops below 200, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H25/18
CPCD21H25/18
Inventor 陈旭东冯登崇洪炜
Owner SUN YAT SEN UNIV
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