Deacidification device and deacidification method for paper documents

Abstract

The invention provides a paper document deacidification device and method. The device comprises a controller, a base, a document bracket, a paper detection device, an atomizing spraying device, a page turning device, a feed liquid pool, a hydrosolvent deacidification liquid defined amount control device and hydrosolvent deacidification liquid delivery pipelines, wherein the document bracket is arranged on the base, the paper detection device and the atomizing spraying device are arranged on the document bracket and located on the two sides of the document bracket respectively, and the page turning device is arranged in the middle of the document bracket; the hydrosolvent deacidification liquid defined amount control device is arranged between the atomizing spraying device and the feed liquid pool, the hydrosolvent deacidification liquid defined amount control device is connected with the atomizing spraying device and the feed liquid pool through the hydrosolvent deacidification liquid delivery pipelines respectively, the paper detection device, the hydrosolvent deacidification liquid defined amount control device, the atomizing spraying device and the automatic page turning device are all electrically connected with the controller, and a paper pH detector is arranged on the paper detection device. In this way, uniform deacidification of the whole paper document is achieved, alkali stock is uniform, and deformation and damage of the document are avoided.

Description

technical field [0001] The invention belongs to the technical field of library document protection, and in particular relates to a paper document deacidification device and deacidification method. Background technique [0002] Due to the influence of the material structure and the storage environment, the phenomenon of paper acidification will occur in the long-term preservation of modern machine-made paper documents. It is a worldwide issue to protect paper documents and reduce acidification damage. [0003] The deacidification treatment of the entire paper literature at home and abroad has two major methods: gas phase deacidification treatment and liquid phase deacidification treatment; liquid phase deacidification mainly includes aqueous solvent deacidification solution and organic solvent deacidification solution. Gas-phase deacidification and organic solvent deacidification have the common problems of being toxic, inflammable and explosive, polluting the environment, an...

AI Technical Summary

Problems solved by technology

Using gas phase deacidification and organic solvent deacidification, their common problems are poisonous and harmful, flammable and explosive, polluting the environment, and the whole set of equipment for deacidification and pollution-free treatment is huge, which is not conducive to the popularization and application of deacidification technology

[0004] The two problems that the water solvent deacidification solution is used for the deacidification of the whole paper document are: 1. Uneven deacidification: the process of using the water solvent deacidification solution to the whole paper document deacidification is alkaline in aqueous solution. OH ionized by deacidification medium - H + Ion combination, deacidification of paper documents, OH contained in aqueous solution - The ions gradually permeate from the edge of the whole paper document to the inside with the aqueous solution. During the permeation process, the OH in the aqueous solution - Ion constantly with the H of the paper literature pages along the way + The ions undergo a neutralization reaction, the OH in the aqueous solution penetrating into the pages of the paper document - Concentration decreases along the depth direction, resulting in uneven deacidification of the pages of the entire paper document

Suspended water solvent deacidification solution is used to deacidify the entire paper document using the soaking method. During the soaking process of the entire paper document deacidification, although water can penetrate into the pages of the entire paper document, However, when the suspended alkaline deacidification medium is immersed in the surroundings of the entire paper document page with the water solvent, it is blocked by layers of capillary fibers between the pages, and basically cannot enter the inside of the page, resulting in the distribution of alkali stock after deacidification of the paper document Severe unevenness is not conducive to the long-term protection of paper documents

3. Deformation of paper: the paper fibers of paper documents have anisotropy, and at the same time, the filler added in the paper and the calendering during setting make the paper in the process of soaking and deacidification due to the inconsistency of water absorption and swelling of the paper and the recovery of the paper Deformation, resulting in deformable damage to the appearance of paper documents after soaking and deacidification

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