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Method for protecting paper cultural relics containing transition metal

A technology for paper cultural relics and transition metals, applied in the post-processing of waste paper, post-processing of printing, printing, etc., can solve the problem that the protection effect of paper containing transition metal pigments is not ideal, cannot effectively remove free radicals, and cannot play a long-term effect. protection and other issues, to achieve the effect of extending the protection time, high utilization of raw materials, and avoiding damage

Active Publication Date: 2022-01-04
FUDAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these protective agents affect the color, pH or surface pigment state of the paper to a certain extent, and cannot effectively remove free radicals, and cannot play a long-term protective role.
[0004] Therefore, in view of problems such as the unsatisfactory protective effect of conventional protective agents on paper containing transition metal pigments, the short protective effect, and the need for repeated application, how can it be used without affecting the color of the paper? , pH or the state of surface pigments, prolonging the effective protection time of paper cultural relics is becoming more and more interesting

Method used

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  • Method for protecting paper cultural relics containing transition metal
  • Method for protecting paper cultural relics containing transition metal
  • Method for protecting paper cultural relics containing transition metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Preparation of poly-2-acrylic acid-2-hydroxypropyl ester

[0033] Since the commercially available acrylate monomer contains a stabilizer, it is first necessary to remove the stabilizer, specifically, the commercially available 2-acrylic acid-2-hydroxypropyl ester is passed through the The stabilizer was removed by neutral alumina column chromatography, wherein the height of the neutral alumina chromatographic column was 10 cm, and the collected monomer reagents needed to be evacuated 3 times with inert gas to remove oxygen.

[0034] 100 mL of purified 2-acrylic acid-2-hydroxypropyl ester monomer was placed in a 150 mL flask, and a magnetic stirrer and azobisisobutyronitrile (AIBN) with a mass fraction of 0.1% of the monomer were added.

[0035] The reaction flask was placed in a 90°C oil bath with stirring and heating. After 3 hours of reaction, transparent and clear poly-2-acrylic acid-2-hydroxypropyl ester was obtained. The reaction equation was as follows, and th...

Embodiment 2

[0050] 1) Preparation of poly-2-acrylic acid-2,4-dihydroxypentyl ester

[0051] Under the protection of external pump pressure and inert gas, 100-200mL of commercially available monomer 2-acrylic acid-2,4-dihydroxypentyl ester was used to remove the stabilizer through neutral alumina column chromatography. The height of the aluminum chromatographic column is 10 cm, and the collected monomer reagent needs to be evacuated 3 times with inert gas to remove oxygen.

[0052] 100 mL of purified 2-propenoic acid-2,4-dihydroxypentyl ester monomer was placed in a 150 mL flask, and a magnetic stirrer and azobisisobutyronitrile (AIBN) with a monomer mass fraction of 0.1% were added.

[0053] The reaction flask was placed in an oil bath at 90°C and stirred and heated. After 3 hours of reaction, transparent and clear poly-2-acrylic acid-2,4-dihydroxypentyl ester was obtained. The product poly-2-acrylic acid-2,4-dihydroxypentyl ester was produced The rate is 98%. The prepared poly-2-acryli...

Embodiment 3

[0061] 1) Preparation of poly-2-acrylic acid-2,3,4-trihydroxybutyl ester

[0062] Under the protection of external pump pressure and inert gas, 100-200mL of commercially available monomer 2-acrylic acid-2,3,4-trihydroxybutyl ester was used to remove the stabilizer through neutral alumina column chromatography, wherein, The height of the permanent alumina chromatographic column is 10cm, and the collected monomer reagent needs to be evacuated with inert gas 3 times to remove oxygen.

[0063] 100 mL of purified 2-propenoic acid-2,3,4-trihydroxybutyl ester monomer was placed in a 150 mL flask, and a magnetic stirrer and azobisisobutyronitrile (AIBN) with a monomer mass fraction of 0.1% were added.

[0064] Place the reaction flask in an oil bath at 90°C and heat it with stirring. After 3 hours of reaction, transparent and clear poly-2-acrylic acid-2,3,4-trihydroxybutyl ester, poly-2-acrylic acid-2,3,4-trihydroxy Butyl ester yield was 97%. poly-2-2-acrylic acid-2,3,4-trihydroxybu...

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Abstract

The invention provides a method for protecting paper cultural relics containing transition metal, wherein the method comprises the steps: an area needing to be protected in the paper cultural relics is contacted with a polyacrylate compound, the polyacrylate compound has a structure represented by a formula 1, and M is alkyl substituted by at least one hydroxyl group. According to the method for protecting the paper cultural relics containing the transition metal, on one hand, the polyacrylate compound has extremely low saturated vapor pressure and volatility and can be attached to the surface of paper for a long time, and on the other hand, with the active free radical capturing effect and the anti-oxidative degradation effect of the polyacrylate compound, the damage of hydrogen peroxide and hydroxyl radicals to a paper fiber skeleton can be effectively avoided, so that the effective protection time of the paper cultural relics containing the transition metal is prolonged.

Description

technical field [0001] The invention relates to the technical field of paper cultural relics protection, in particular to a method for protecting paper cultural relics containing transition metals. Background technique [0002] In recent years, a large number of paper cultural relics collected around the world have suffered serious deterioration and discoloration during the long-term preservation process. Paper is composed of cellulose polymers through multi-scale assembly of polymer chains. At the molecular level, the degradation of cellulose leads to the reduction of its degree of polymerization, the formation of terminal aldehyde groups, and the generation of carbonyl or carboxyl oxidation groups. And some transition metal substances contained in pigments will also promote the degradation of cellulose in paper. For example, the use of iron gall ink will cause serious corrosion to the paper, causing perforation around the ink; in Chinese paintings using malachite pigments...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H25/18B41M7/00C08F120/20
CPCD21H25/18B41M7/0063C08F120/20
Inventor 闫玥儿张昊诚姚晶晶唐颐张旭罗婵
Owner FUDAN UNIV
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