A slow-release alkaline molecular sieve deacidification agent and its preparation method and application

A sieve deacidification agent and slow-release technology, which is applied in the field of slow-release alkaline molecular sieve deacidification agent and its preparation, can solve problems such as difficulty in imparting multifunctionality, uncontrollable alkali amount and release, and organic solvent pollution. Achieve good biocompatibility, long-lasting effect, and high hydrothermal stability

Active Publication Date: 2020-07-14
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these deacidification agents have certain effects on paper deacidification, there are still some deficiencies in these deacidification agents, which cannot meet the needs of paper-based materials, such as excessive alkali strength, uncontrollable alkali amount and release, organic solvent pollution, Low security, difficulty in adding multiple functions, etc.

Method used

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  • A slow-release alkaline molecular sieve deacidification agent and its preparation method and application
  • A slow-release alkaline molecular sieve deacidification agent and its preparation method and application
  • A slow-release alkaline molecular sieve deacidification agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Adopt Y-type molecular sieve, immerse in the potassium nitrate aqueous solution of concentration 5wt%, the mass ratio of this solution and molecular sieve is 10:1, temperature is 60 ℃, reaction time is 2 hours. The solid product was isolated by filtration, washed three times with deionized water, and then dried at 100°C for 12 hours. A basic molecular sieve with a potassium ion exchange degree of 50% is obtained, and a slow-release basic molecular sieve deacidification agent is formulated at a mass ratio of 0.5 wt%.

[0037] (2) The paper was pre-cleaned to remove surface impurities with an ear washing ball, and treated at a constant temperature and humidity for 5 hours at a temperature of 20° C. and a humidity of 10% RH. Deacidification by dipping, the mass ratio of paper to deacidification agent aqueous solution is 0.2:1, soak at room temperature for 20 minutes.

[0038] (3) The deacidified paper is dried at room temperature for 24 hours.

[0039] The paper used...

Embodiment 2

[0041] (1) Adopt Y-type molecular sieve, immerse in the cesium sulfate aqueous solution that concentration is 7wt%, the mass ratio of this solution and molecular sieve is 20:1, temperature is 90 ℃, and reaction time is 8 hours. The solid product was isolated by filtration, washed three times with deionized water, and then dried at 120°C for 20 hours. A basic molecular sieve with a cesium ion exchange degree of 40% is obtained, and a slow-release basic molecular sieve deacidification agent is formulated at a mass ratio of 0.5 wt%.

[0042] (2) The paper is pre-cleaned with an ear washing ball to remove surface impurities, and treated at a constant temperature and humidity for 1 hour at a temperature of 50° C. and a humidity of 50% RH. Deacidification is carried out by immersion, the mass ratio of paper to deacidifier aqueous solution is 0.1:1, the immersion time is 40 minutes, and the temperature is 20°C.

[0043] (3) The deacidified paper is dried at a temperature of 30° C. f...

Embodiment 3

[0046] (1) Adopt Y-type molecular sieve, immerse in the rubidium nitrate aqueous solution whose concentration is 6wt%, the mass ratio of this solution and molecular sieve is 15:1, the temperature is 80 ℃, and the reaction time is 15 hours. The solid product was isolated by filtration, washed three times with deionized water, and then dried at 90°C for 16 hours. A basic molecular sieve with a rubidium ion exchange degree of 45% is obtained, and a slow-release basic molecular sieve deacidification agent is formulated at a mass ratio of 1 wt%.

[0047] (2) The paper is pre-cleaned with an ear washing ball to remove surface impurities, and treated at a constant temperature and humidity for 10 hours at a temperature of 20° C. and a humidity of 30% RH. Deacidification is carried out by immersion, the mass ratio of paper to deacidifier aqueous solution is 0.05:1, the immersion time is 20 minutes, and the temperature is 25°C.

[0048] (3) The deacidified paper is dried at a temperatu...

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Abstract

The invention relates to a slow-release type alkaline molecular sieve acid removal agent and a preparing method and application thereof. The acid removal agent comprises a solvent and a slow-release type alkaline molecular sieve material dispersed in the solvent. The slow-release type alkaline molecular sieve material comprises a molecular sieve and alkaline metal loaded on the molecular sieve. When the acid removal agent is prepared, a metal ion water solution and the molecular sieve are mixed for ion exchange, a solid product is obtained after filtering, the solid product is washed and driedand then dispersed in the solvent, and the acid removal agent is obtained; the acid removal agent is used for paper acid removal. Compared with the prior art, the slow-release type alkaline molecularsieve acid removal agent has the advantages of being simple in synthesis method, controllable in alkalinity and alkali intensity, high in structural stability, safe and free of toxin; an acid removalmethod has a slow-release acid removal effect; the acid removal agent has no remarkable influences on paper aberration or pigment, and is simple in acid removal process, suitable for emergency acid removal repairing and preventive protection on acidified paper and suitable for enlarged acid removal operation.

Description

technical field [0001] The invention belongs to the technical field of ancient books protection, and relates to a slow-release alkaline molecular sieve deacidification agent and a preparation method and application thereof. Background technique [0002] Paper cultural relics in the form of ancient books, archives and documents are important cultural heritages of all mankind, which record the progress of human history and civilization. The "Memory of the World Project" initiated by UNESCO expects people to explore and choose the best protection method according to the value of documents and the particularity of their materials, so that they can be preserved and utilized for as long as possible. However, due to the limitation of storage conditions, a large number of paper materials are suffering from accelerated damage, and this has become a common problem faced by countries all over the world. [0003] The total amount of paper cultural relics in my country is very large. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H25/18
CPCD21H25/18
Inventor 张宏斌刘鹏王思浓唐颐
Owner FUDAN UNIV
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