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Method for deacidifying paper by electro-adsorption

An electric adsorption and paper technology, applied in the post-processing of waste paper, etc., can solve the problems of low efficiency and small processing capacity, and achieve the effects of reducing negative impact, low cost, and high equipment requirements

Active Publication Date: 2018-10-12
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, this processing method can usually only be processed in a single sheet, and the processing volume is small each time, and the efficiency is low

Method used

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  • Method for deacidifying paper by electro-adsorption
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  • Method for deacidifying paper by electro-adsorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Soak the non-woven mat with deionized water, then spread the soaked mat on the anode plate, and the anode plate is covered with activated carbon fiber cloth (thick 1.5mm, BET: 1000m 2 / g);

[0040] Lay the single-page paper to be processed (one page of the "English Nine Hundred Sentences Chinese Translation Notes" printed by Beijing Commercial Press in 1978; 16K, offset paper printing) on ​​the above-mentioned pad, and place the flat graphite cathode plate Press it and clamp the two plates together;

[0041] Connect the two polar plates to regulated direct current, the voltage is 1.5V, and the electrosorption time is 5 minutes; then cut off the power supply, remove the pad, and let the paper air dry naturally. The situation comparison before and after paper deacidification is shown in Table 1 and figure 1 , figure 1 It is a comparison chart of paper before and after deacidification in Example 1. figure 1 In the middle, the right side is the paper before deacidificat...

Embodiment 2

[0046] Soak the non-woven mat with deionized water, then spread the soaked mat on the anode plate, and the anode plate is covered with activated carbon fiber cloth (thick 1.5mm, BET: 1000m 2 / g);

[0047] Spread the single-page paper to be processed (one page of the "Rhetoric Outline" printed by Shanghai New Knowledge Publishing House in 1957; 16K, offset paper printing) on ​​the above-mentioned pad, press the flat graphite cathode plate, and Clamp the two plates together;

[0048] Connect the two polar plates to regulated direct current, the voltage is 1.5V, and the electrosorption time is 5 minutes; then cut off the power supply, remove the pad, and let the paper air dry naturally. The situation comparison before and after paper deacidification is shown in Table 2 and figure 2 , figure 2 It is a comparison chart of paper before and after deacidification in Example 2. figure 2 In the middle, the right side is the paper before deacidification, and the left side is the p...

Embodiment 3

[0053] Soak the non-woven mat with deionized water, then spread the soaked mat on the anode plate, and the anode plate is covered with activated carbon fiber cloth (thick 1.5mm, BET: 1000m 2 / g);

[0054] Lay the multi-page paper to be processed (three pages of the "English Nine Hundred Sentences Chinese Translation Annotation" printed by Beijing Commercial Press in 1978; 16K, offset paper printing) on ​​the above-mentioned cushion layer, and place the flat graphite cathode plate Press it and clamp the two plates together;

[0055] Connect the two polar plates to regulated direct current, the voltage is 1.5V, and the electrosorption time is 8 minutes; then cut off the power supply, remove the pad, and let the paper air dry naturally. See Table 3 for the comparison of paper before and after deacidification.

[0056] Table 3 Example 3 Comparison table of analytical indicators before and after paper deacidification

[0057]

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Abstract

The invention provides a method for deacidifying a paper by electro-adsorption. The method comprises S1, contacting a paper to be treated with a water absorbent pad so that the paper to be treated iswetted by water in the water absorbent pad containing water, and S2 placing the wet paper and the water absorbent pad contacting with the paper between an inert anode plate and an inert cathode plate,wherein a porous carbon material is paved on the surface of the inert anode plate, and carrying out electro-adsorption through direct currents to obtain the deacidified paper. The electrosorption deacidification speed of the method is much faster than that of the traditional aqueous solution method and one process takes only a few minutes so that the negative impact of the traditional soaking anddeacidification technology on the paper is greatly reduced. The method is suitable for treatment on a single sheet, multiple sheets and whole book and realizes precise control of pH. The method has the advantages of simpleness, reliability, environmental friendliness, safety and low cost and solves the problem that a wet state in a long time may cause paper deformation, writing fading and ink penetration.

Description

technical field [0001] The invention relates to the technical field of paper deacidification protection, in particular to the deacidification protection technology of paper cultural relics, archives and books, in particular to a method for deacidification of paper by an electric adsorption method. Background technique [0002] The acidity of literature paper is an important factor affecting the preservation life of literature; since people discovered the self-destruct phenomenon of paper in the 19th century, scientists from various countries have been studying the methods and equipment of paper deacidification protection. At present, the commonly used paper deacidification methods in the world mainly include gas phase deacidification method, organic solvent deacidification method and aqueous solution deacidification method. Among them, because the aqueous solution deacidification method is simple and easy to implement, and is more environmentally friendly, there are many res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H25/18
CPCD21H25/18
Inventor 秦颍黄桥
Owner UNIV OF SCI & TECH OF CHINA
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