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A method for deacidification and protection of paper cultural relics based on plasma hydroxylation of fiber surface

A paper cultural relic, plasma hydroxyl technology, applied in the post-processing of waste paper and other directions, can solve the problems of incomplete deacidification of paper, uneven deacidification effect, acidification, etc., and achieves remarkable deacidification effect, uniform distribution, and simple process flow. Effect

Active Publication Date: 2022-07-01
HANGZHOU ZHONGCAI TECH CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For many paper documents that have been stored for a long time, there is an inert layer on the surface. If the deacidification protection is directly performed with an aqueous deacidification solution, the deacidification effect will be uneven due to the existence of the inert layer, and some deacidification solutions It cannot enter the inside of the paper, so that the deacidification of the paper is not complete. These problems can easily cause the paper to be acidified again in a short time after deacidification

Method used

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  • A method for deacidification and protection of paper cultural relics based on plasma hydroxylation of fiber surface
  • A method for deacidification and protection of paper cultural relics based on plasma hydroxylation of fiber surface
  • A method for deacidification and protection of paper cultural relics based on plasma hydroxylation of fiber surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The acidified paper document is placed 15mm below the counter electrode, the counter electrode is connected to the plasma power supply, the distance between the discharge counter electrodes is 10mm, the discharge method is dielectric barrier discharge, the power supply is turned on, the voltage is adjusted to 80V, and the current is 0.3A. When the discharge between the electrodes is stable, start timing, and reciprocate the paper document parallel to the electrodes at a speed of 1mm / s, so that the surface of the paper document can be evenly activated. The time is 3min. Remove paper documents for later use.

[0034] Performance Testing:

[0035] The activated paper documents in Example 1 are such as figure 1 As shown in the figure, the surface morphology is basically the same as that of the base paper, and the contact angle test with the aqueous solution was carried out by taking the same paper document without discharge current sweeping treatment as in Example 1 and th...

Embodiment 2

[0040] The same acidified paper document as in Example 1 was selected and placed 40 mm below the counter electrode, and the rest were the same as in Example 1. The wettability of the paper in Example 2 was significantly improved after the plasma air flow treatment, the contact angle of the aqueous solution when untreated was 75°, and the contact angle with the aqueous solution after treatment was 10°.

Embodiment 3

[0057] The acidified paper document is placed 15mm below the counter electrode, the counter electrode is connected to the plasma power supply, the distance between the discharge counter electrodes is 10mm, the discharge method is dielectric barrier discharge, the power supply is turned on, the voltage is adjusted to 80V, and the current is 0.3A. When the discharge between the electrodes is stable, start timing, and reciprocate the paper documents parallel to the electrodes at a speed of 1 mm / s, so that the surface of the paper documents can be uniformly activated. The time is 3 minutes. After the treatment is completed, turn off the power.

[0058] Take out the paper document after the discharge current is swept through the treatment, carry out ultrasonic atomization deacidification with water-based deacidification agent (5wt% calcium hydroxide solution), after atomization deacidification for 3min, take out the deacidified paper, and wait for it to be in the air. After natural ...

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Abstract

The present application provides a method for deacidification and protection of paper cultural relics based on plasma hydroxylation of fiber surfaces, comprising the following steps: 1) using plasma generated by a counter electrode discharge parallel to the surface of the paper cultural relics to treat the surface of the paper cultural relics; 2. ) The deacidification agent is atomized and applied to the surface of the treated paper cultural relics for deacidification treatment. The method can uniformly hydroxylate the surface of the paper cultural relic without affecting the surface morphology and structure of the paper cultural relic, so that the electrolyte ions in the deacidification agent can quickly diffuse and penetrate into the inside of the paper cultural relic, so as to realize the treatment of the paper cultural relic. Deacidification protection of quality cultural relics.

Description

technical field [0001] The present application relates to the field of deacidification protection of cultural relics, in particular to a method for deacidification protection of paper cultural relics based on plasma hydroxylation of fiber surfaces. Background technique [0002] Paper is a good carrier of information and culture. During the preservation process of paper documents, due to factors such as air pollutants in the preservation environment, acidic secretions of molds, and acid residues in the production process, the paper will be acidified, that is, the pH of the paper will decrease, and the overall appearance will be acidic. The cellulose of paper is easily hydrolyzed under the catalysis of acid, and the degree of polymerization of cellulose is reduced, which leads to the decrease of paper strength, accelerates the aging of paper, and even causes paper to be broken and unusable in severe cases. Therefore, it is an effective method to prolong the storage time of ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H25/18
CPCD21H25/18
Inventor 张溪文徐春辉徐绍艳陈炳铨施文正唐晓敏
Owner HANGZHOU ZHONGCAI TECH CO LTD
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