Simple and high-efficiency paper deacidification method

A deacidification method and paper technology, applied in the post-treatment of waste paper, etc., can solve the problems of chemical reagent toxicity, paper deformation, fading, etc., and achieve the effect of solving high equipment requirements, avoiding paper deformation, and delaying acidification

Inactive Publication Date: 2014-07-02
INST OF ARCHIVAL SCI & TECH OF SICHUAN
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Problems solved by technology

The traditional liquid-phase deacidification method has its own defects that are difficult to overcome, such as: the solution soaking method causes paper deformation, discoloration, toxicity of chemical reagents, low efficiency, etc., and it is difficult to obtain new technological breakthroughs; the traditional gas-phase deacidification of paper is in Under the cooperation of vacuum, the alkaline gas that can be vaporized or volatilized is

Method used

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  • Simple and high-efficiency paper deacidification method

Examples

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Effect test

Embodiment 1

[0021] A simple and efficient paper deacidification method: build a net-shaped paper bracket in a closed space, connect the outlet of the ultrafine particle generator with the closed space, and place a 1% NaOH solution in an ultrasonic In the ultrafine particle generator, turn on the power of the ultrafine particle generator equipment, and process the deacidification solution into ultrafine particles. After testing, the diameter of the ultrafine particles is 2-10 μm. When the temperature in the closed space is 15°C and the air humidity reaches 80%RH , put the paper to be deacidified on the bracket in the space, make the paper contact with the ultrafine particles, so that the ultrafine particles evenly contact the paper fibers, after 12 minutes, the air humidity in the closed space is 82% RH, and the paper and ultrafine particles are finished. At this time, there are no obvious watermarks and wrinkles on the surface of the paper. Put the deacidified paper in another closed space...

Embodiment 2

[0025] A simple and efficient paper deacidification method: connect the outlet of the air-compressed ultrafine particle generator to the closed space for deacidification, put the KOH solution with a concentration of 1% in the air-compressed ultrafine particle generator, and turn on the ultrafine particle generator. Microparticle generator equipment power supply, process the deacidification liquid into ultrafine particles, the diameter of ultrafine particles in the mist is 0.5-15μm, when the temperature in the closed space is 18°C, and the air humidity reaches 83%RH, put the paper to be deacidified in the space After 10 minutes on the bracket in the closed space, the humidity of the air in the closed space is 85% RH, and the contact between the paper and the ultrafine particles is ended. At this time, there are no obvious watermarks and wrinkles on the surface of the paper. After 12 hours of constant temperature and humidity in the space, take it out and place it in the air, and...

Embodiment 3

[0029] A simple and efficient paper deacidification method: connect the outlet of the ultrasonic ultrafine particle generator to the closed space for deacidification, and inject 2% Na 2 CO 3 Put the solution in an air-compressed ultrafine particle generator, turn on the power of the ultrafine particle generator equipment, and process the deacidified liquid into ultrafine particles. The diameter of the ultrafine particles in the mist is 2-11 μm. At 88% RH, put the paper to be deacidified on the bracket in the space for 10 minutes, the humidity of the air in the closed space is 90% RH, and the contact between the paper and the ultrafine particles is over. At this time, there is no obvious watermark and Wrinkle phenomenon, put the deacidified paper in another closed space with constant temperature and humidity for 12 hours, take it out and place it in the air, and let the water dry naturally at room temperature to meet the deacidification requirement. The pH of the paper after de...

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Abstract

The invention discloses a simple and high-efficiency paper deacidification method, aiming at solving the problems of paper deformation, writing fading, ink penetration and the like in the process of soaking paper in a soaking solution, as well as the problems that gas-phase deacidification equipment is high in requirement, high in cost and high in risk and the like. The method comprises the following steps: treating a deacidification solution by utilizing a superfine particle generator to form superfine particles, and filling a closed space, full of paper to be subjected to deacidification, with the superfine particles, so that the superfine particles and acidic materials in the paper are reacted, and the aim of deacidifying the paper is achieved. According to the method, the superfine particles can be permeated and diffused in paper fibers and fiber gaps, and the superfine particles and the acidic materials in the paper are neutralized in the diffusion process so as to achieve the deacidification effect. Meanwhile, a certain deacidification agent residue is remained in the paper, and paper deacidification is prevented or delayed.

Description

technical field [0001] The invention relates to a new technology for deacidifying paper by using an ultrafine particle generator to treat liquid deacidification reagents into ultrafine particles. Background technique [0002] Paper is the basic carrier of historical and cultural heritage of books and archives. It needs to be preserved for a long time and maintain a certain performance. Therefore, the durability of paper is an important issue of common concern to the book and archive circles. [0003] Due to the singleness of the time series and the change of the environment, most of the paper cultural relics have suffered from various diseases, one of which is the acidification of paper. The main chemical component of paper is cellulose, which is composed of glucose bonds between base rings in cellulose macromolecules. When the paper is acidified, the hydrolysis of the cellulose macromolecules will be promoted, the glucose bond between the base rings in the cellulose macro...

Claims

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Application Information

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IPC IPC(8): D21H25/18
Inventor 袁可喻宏贵方秋生廖勇军
Owner INST OF ARCHIVAL SCI & TECH OF SICHUAN
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