Deacidification agent based on sodium phytate-modified nano magnesium oxide and preparation method of deacidification agent

A technology of nano-magnesium oxide and sodium phytate, which is applied in post-processing of printing, post-processing of waste paper, printing, etc. It can solve the problems of poor dispersion and achieve the effect of mild reaction conditions, high efficiency and low dosage

Active Publication Date: 2019-08-27
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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  • Deacidification agent based on sodium phytate-modified nano magnesium oxide and preparation method of deacidification agent
  • Deacidification agent based on sodium phytate-modified nano magnesium oxide and preparation method of deacidification agent
  • Deacidification agent based on sodium phytate-modified nano magnesium oxide and preparation method of deacidification agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Disperse 2.5g of nano-magnesium oxide powder in 197.5g of deionized water at 70°C and stir evenly to obtain dispersion A with a concentration of 12.5g / L. Add 1 g of sodium phytate into 499 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 70°C for 2 hours of reaction. Suction filtration while hot after the reaction, repeated washing with 70° C. deionized water for 3 times, and then vacuum-dry the filter cake at 35° C. for 24 hours to obtain modified nano-magnesium oxide.

[0024] 1600g of perfluoroheptane and 32g of petroleum ether were mixed and stirred uniformly to obtain a mixed solvent. Add 2g of dried modified nano-magnesium oxide into 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...

Embodiment 2

[0026] Disperse 2g of nano-magnesium oxide powder in 248g of deionized water at 70°C and stir evenly to obtain dispersion A with a concentration of 10g / L. Add 0.8 g of sodium phytate into 199.2 g of absolute ethanol, and stir evenly to obtain dispersion B with a concentration of 4 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 70° C. deionized water for 3 times, and then vacuum-dry the filter cake at 35° C. for 24 hours to obtain modified nano-magnesium oxide.

[0027] 1615g of perfluoroheptane and 35g of petroleum ether were mixed and stirred uniformly to obtain a mixed solvent. Add 1.5g of dried modified nano-magnesium oxide into the mixed solvent, transfer the obtained mixture to a homogenizer, homogenize it for 8 minutes under the condition of 8000r / min, and then sonicate it for 30 minutes, w...

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Abstract

The invention relates to a deacidification agent based on sodium phytate-modified nano magnesium oxide and a preparation method of the deacidification agent. The preparation method comprises the following steps: firstly, respectively dispersing nano magnesium oxide and sodium phytate in deionized water and alcohol solvent; then, mixing the two solutions in proportion for modification; then, dispersing the modified nano magnesium oxide in the mixed solvent of perfluoroheptane and petroleum ether to obtain the target deacidification agent. The deacidification agent has advantages of easily available raw materials, mild reaction conditions, simplicity and convenience in preparation and use methods, low dosage, high efficiency and good and uniform deacidification effect.

Description

technical field [0001] The invention relates to the technical field of book file processing and chemical composition, in particular to a paper deacidification agent based on sodium phytate-modified nano magnesium oxide 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, which are mainly caused by 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H25/18B41M7/00
CPCB41M7/0063D21H25/18
Inventor 张涛
Owner HUBEI TAIDEANXIN INFORMATION TECH CO LTD
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