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Paper deacidification agent based on sodium dodecylbenzenesulfonate modified magnesium hydroxide and preparation method thereof

A technology of sodium dodecylbenzene sulfonate and magnesium hydroxide, which is applied in the field of books, archives and chemical compositions, can solve the problems of poor dispersion and achieve the effects of improving the modification rate, easy availability of raw materials, and mild reaction conditions

Active Publication Date: 2021-08-03
HUBEI TAIDEANXIN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the very small polarity of fluoroalkanes, the dispersion of magnesium hydroxide, magnesium oxide and other substances in them is extremely poor, so improving the dispersibility of deacidification substances in organic solvents is a key factor to improve the efficiency of deacidification agents

Method used

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  • Paper deacidification agent based on sodium dodecylbenzenesulfonate modified magnesium hydroxide and preparation method thereof
  • Paper deacidification agent based on sodium dodecylbenzenesulfonate modified magnesium hydroxide and preparation method thereof
  • Paper deacidification agent based on sodium dodecylbenzenesulfonate modified magnesium hydroxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Disperse 2g of magnesium hydroxide powder in 398g of deionized water at 70°C and stir evenly to obtain dispersion A with a concentration of 5g / L. Add 0.25 g of sodium dodecylbenzenesulfonate into 499.75 g of absolute ethanol, and stir evenly to obtain dispersion B with a concentration of 0.5 g / L. The dispersion B was slowly added dropwise to the dispersion A, and the temperature of the mixed solution was maintained at 70°C for 2 hours of reaction. Suction filtration while hot after the reaction, repeated washing with hot ethanol at 70°C for 3 times, and then vacuum-dry the filter cake at 35°C for 24 hours to obtain modified magnesium hydroxide.

[0023] 1615g of perfluoroheptane and 32g of petroleum ether were mixed and stirred uniformly to obtain a mixed solvent. Add 2g of dried modified magnesium hydroxide to the mixed solvent, transfer the resulting mixture to a homogenizer, homogenize it for 8 minutes under the condition of 8000r / min, and then sonicate it for 30 mi...

Embodiment 2

[0025] Disperse 2g of magnesium hydroxide powder in 498g of deionized water at 75°C and stir evenly to obtain dispersion A with a concentration of 4g / L. Add 0.2 g of sodium dodecylbenzenesulfonate to 99.8 g of absolute ethanol, and stir evenly to obtain a dispersion B with a concentration of 2 g / L. The dispersion B was slowly added dropwise to the dispersion A, and the temperature of the mixed solution was maintained at 75° C. for 2 hours. Suction filtration while hot after the reaction, repeated washing with hot ethanol at 75°C for 3 times, and then vacuum-dry the filter cake at 35°C for 24 hours to obtain modified magnesium hydroxide.

[0026] 1615g of perfluoroheptane and 25g of petroleum ether were mixed and stirred uniformly to obtain a mixed solvent. Add 1.5g of dried modified magnesium hydroxide to the mixed solvent, transfer the resulting mixture to a homogenizer, homogenize it for 8 minutes under the condition of 8000r / min, and then sonicate it for 30 minutes, which ...

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Abstract

The invention relates to a paper deacidification agent based on sodium dodecylbenzenesulfonate modified magnesium hydroxide and a preparation method thereof. First prepare magnesium hydroxide aqueous solution and sodium dodecylbenzenesulfonate alcohol solution respectively, then mix the two to realize the modification of magnesium hydroxide, and finally disperse the modified magnesium hydroxide in perfluoroheptane, petroleum In the mixed solvent of ether, the target deacidification agent is obtained. The raw materials of the deacidification agent are easy to obtain, the reaction conditions are mild, the preparation and use methods are simple and convenient, the dosage is small, the efficiency is high, and the deacidification effect is good and uniform.

Description

technical field [0001] The invention relates to the technical field of books, archives and chemical compositions, in particular to a paper deacidifying agent based on sodium dodecylbenzenesulfonate modified magnesium hydroxide and a preparation method thereof. Background technique [0002] At present, there are tens of thousands of precious books, calligraphy and paintings, newspapers, archives and other cultural heritage preserved in various libraries, museums, and archives in my country, most of which are written and printed by handmade paper or mechanical paper. become. With the passage of time, paper documents will gradually appear yellowing, mildew, pulverization and chipping, mainly due to the acidification of paper. The deterioration of paper materials is manifested as discoloration macroscopically, and the structure is broken (decreased mechanical strength) microscopically. [0003] Cellulose is the main component of paper. It is quite stable under neutral and weakl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H25/18D21H21/14
CPCD21H21/14D21H25/18
Inventor 张涛黄超凡李伟吕振利童宁
Owner HUBEI TAIDEANXIN INFORMATION TECH CO LTD