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An in-situ electroosmotic deacidification method suitable for whole books

A deacidification method, a technology for books, applied in the post-processing of waste paper, etc., to prevent wrinkle deformation, improve efficiency and safety, and improve permeability and diffusion speed.

Active Publication Date: 2022-04-12
HANGZHOU ZHONGCAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide an in-situ electroosmotic deacidification method suitable for the entire book to solve the problem of how to complete the uniform deacidification of the entire book without destroying the paper structure and morphology.

Method used

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  • An in-situ electroosmotic deacidification method suitable for whole books
  • An in-situ electroosmotic deacidification method suitable for whole books
  • An in-situ electroosmotic deacidification method suitable for whole books

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Select acidified books that have been bound and cannot be separated, first use 5wt% calcium hydroxide aqueous solution to deacidify by ultrasonic atomization, and at the same time use airflow to blow the acidified books to separate each page of the acidified books, and wait for the books to be atomized After the deacidification process is completely wetted, clamp the book between the two flat electrodes, adjust the clamping pressure to 3000N, adjust the relative humidity of the environment to 90%, and then apply a frequency of 20Hz to the two flat electrodes and a maximum voltage of 60V The square wave waveform voltage starts to perform electroosmotic deacidification. After 10 minutes of electroosmotic deacidification, remove the voltage applied to the plate electrodes, adjust the ambient temperature to 35°C, and the relative humidity to 25%, after standing for 6 hours, remove the pressure on the clamping plate, take out the books, and complete the deacidification proce...

Embodiment 2

[0063] Select the same binding indivisible acidified books as in Example 1, adjust the deacidification agent to 4wt% magnesium hydroxide aqueous solution, and the rest are the same as in Example 1.

[0064] Performance Testing:

[0065] The books after the electroosmotic deacidification treatment in Example 2 were taken to test the pH value and characterize the uniformity of deacidification of the whole book and the uniformity of deacidification of individual sheets in the book. The results are shown in Table 8, indicating that the paper was uniformly deacidified.

[0066] Table 8: pH value and variance of book paper after deacidification

[0067]

Embodiment 3

[0069] Choose the same inseparable bound acidified books as in Example 1, adjust the maximum voltage during the electroosmotic deacidification process to 100V, and the rest of the operation steps are the same as in Example 1.

[0070] Performance Testing:

[0071] The books after the electroosmotic deacidification treatment in Example 3 were taken to test the pH value and characterize the uniformity of deacidification of the whole book and the uniformity of deacidification of individual sheets in the book. The results are shown in Table 9, indicating that the paper was uniformly deacidified.

[0072] Table 9: pH value and variance of book paper after deacidification

[0073]

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PUM

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Abstract

The application provides an in-situ electroosmotic deacidification method suitable for whole books, comprising the following steps: 1) atomizing the deacidification agent and applying it evenly on the acidified books to make it completely wet; The acidified book is clamped between two plate electrodes with voltage applied to carry out electroosmotic deacidification; the voltage applied between the two plate electrodes is AC voltage, the voltage waveform is AC square wave, and the low level is negative voltage. Through the principle of electroosmosis, the method can make the electrolyte ions in the deacidifying agent diffuse evenly in the book, fully neutralize the acidic factors in the book paper, and realize the in-situ uniform electroosmotic deacidification of the entire book that cannot be split .

Description

technical field [0001] This application relates to the field of book deacidification protection, in particular to an in-situ electroosmotic deacidification method suitable for whole books. Background technique [0002] One of the common problems in the use and storage of books is the acidification of book paper, especially books and cultural relics. Since most of the paper used for books and cultural relics is handmade paper, it is easy to acidify during the preservation process, and the acidification of paper will accelerate the aging of paper. , Paper with severe acidification will lose information on the paper surface, decrease in strength, and cannot be used normally. [0003] At present, acidified paper is usually deacidified by soaking in alkaline aqueous solution, alkaline organic solution, and spraying. However, most of the acidified paper documents have been bound into books and cannot be frequently disassembled. Therefore, only the entire book can be deacidified u...

Claims

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Application Information

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