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Deacidification method and device

A deacidification method and deacidification technology, applied in the field of deacidification, can solve the problems of harsh equipment requirements, insignificant deacidification effect, and industrial application limitations, and achieve the solution of sample deformation, uniform deacidification effect, and wide application range. Effect

Inactive Publication Date: 2015-11-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Currently widely used deacidification technologies mainly include solution method and gas phase method, but both have significant defects
The solution method needs to soak the sample to be treated in a deacidifying agent to neutralize the acidic substances in the sample and form an alkaline buffer. This process will cause defects such as deformation, wrinkling, and fading of the pigment on the paper sample, and it can only be operated on a single page. less efficient
Therefore, the method is limited in practical application
[0010] Gas-phase deacidification is a fast deacidification method with a wide range of applications. The commonly used deacidification agent is ammonia gas or amine-containing compounds such as cyclohexylamine carbonate, 1,4-oxazidine, etc., and Inflammable and explosive diethyl zinc, but due to the inconspicuous deacidification effect, poor durability, strong irritation, and needs to be carried out under high vacuum conditions, the requirements for instruments and equipment are relatively strict, resulting in its industrial application. extremely restrictive

Method used

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  • Deacidification method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Spread the paper to be deacidified on the movable workbench;

[0057] (2) Inject Mg(HCO 3 ) 2 Aqueous solution, and conduct atomization treatment, spray the atomized deacidification agent on the paper to be deacidified at a flow rate of 100mL / h, and the spraying time is 30s;

[0058] (3) Turn on the pulse power supply, adjust the current to 0.1A, and the voltage to 75V to form a stable blue-purple linear filamentary plasma, and use the plasma to move and scan the paper in a full range. The scanning time is 1min, and the stripping is completed. acid treatment.

[0059] The pH value and tensile strength of the deacidified paper were tested according to standard procedures to quantify the deacidified effect and determine the effect of deacidified treatment on paper properties.

[0060] After deacidification treatment, the acidified paper is converted from acidic (pH=6.0) to alkaline (pH=7.9), and the tensile strength is increased from 1.60kN / m to 1.93kN / m.

Embodiment 2

[0062] (1) Spread the paper to be deacidified on the movable workbench;

[0063] (2) Inject Mg(HCO 3 ) 2 Aqueous solution, and conduct atomization treatment, spray the atomized deacidification agent on the paper to be deacidified at a flow rate of 100mL / h, and the spraying time is 45s;

[0064] (3) Turn on the pulse power supply, adjust the current to 0.15A, and the voltage to 75V to form a stable blue-purple linear filamentary plasma, and use the plasma to move and scan the paper in a full range. The scanning time is 1min, and the stripping is completed. acid treatment.

[0065] The pH value and tensile strength of the deacidified paper were tested according to standard procedures to quantify the deacidified effect and determine the effect of deacidified treatment on paper properties.

[0066] After deacidification treatment, the acidified paper is converted from acidic (pH=6.2) to alkaline (pH=7.5), and the tensile strength is increased from 1.35kN / m to 1.40kN / m.

Embodiment 3

[0068] (1) Spread the paper to be deacidified on the movable workbench;

[0069] (2) Inject Mg(HCO 3 ) 2 Aqueous solution, and conduct atomization treatment, spray the atomized deacidification agent on the paper to be deacidified at a flow rate of 100mL / h, and the spraying time is 1min;

[0070] (3) Turn on the pulse power supply, adjust the current to 0.25A, and the voltage to 70V to form a stable blue-purple linear filamentary plasma, and use the plasma to move and scan the paper in a full range. The scanning time is 1min, and the stripping is completed. acid treatment.

[0071] The pH value and tensile strength of the deacidified paper were tested according to standard procedures to quantify the deacidified effect and determine the effect of deacidified treatment on paper properties.

[0072] After deacidification treatment, the acidified paper is converted from acidic (pH=6.6) to alkaline (pH=8.1), and the tensile strength is increased from 0.94kN / m to 1.02kN / m.

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Abstract

The invention discloses a deacidification method and device. The deacidification method comprises steps as follows: (1), a to-be-deacidified sample is put in an atomized deacidification agent atmosphere; (2), the to-be-deacidified sample coated with a deacidification agent is treated through plasma. The to-be-deacidified sample is in a single layer or laminated and is not larger than 2mm thick. The step (1) and the step (2) are performed in an air atmosphere at the normal temperature under the normal pressure. According to the deacidification method and device, the application range is wide, the condition is mild, deacidificaiton is complete, and the morphology and the structure of the to-be-deacidified sample cannot be damaged.

Description

technical field [0001] The invention relates to the technical field of deacidification, in particular to a deacidification method and a deacidification device with a wide application range. Background technique [0002] There are many kinds of plant fiber products, the most common of which is paper. All kinds of documents, books, contracts, banknotes, scriptures, ancient calligraphy and paintings are all based on paper. Compared with other human cultural heritage, this kind of paper is used as a carrier. The finished products are particularly fragile, not only fragile, but also prone to aging. [0003] In the 5,000-year history of the splendid civilization of the Chinese nation, since its appearance, paper has always played an important role in recording history, transmitting information, and continuing the essence of culture, providing rich materials for people to study the changes of the times and historical development. [0004] As an important carrier of historical and ...

Claims

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Application Information

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IPC IPC(8): D21H25/18
Inventor 张溪文王庆莉徐绍艳
Owner ZHEJIANG UNIV
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