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Paper depickling solvent as well as preparation method and application thereof

A deacidification agent, paper technology, applied in papermaking, waste paper post-treatment, textiles and papermaking, etc., can solve the problems of non-aqueous organic deacidification agents such as flammability, less alkali residue, flammability and explosion, etc., to achieve Conducive to long-term storage, long-lasting effects, thorough and uniform deacidification

Active Publication Date: 2018-08-03
HANGZHOU ZHONGCAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aqueous solution has better safety and deacidification effect, but it is prone to paper deformation
[0005] The non-aqueous deacidification agent has uneven deacidification and poor effect, which may easily cause paper to fade and have peculiar smell
Moreover, non-aqueous organic deacidification agents are flammable and biologically toxic, which poses a threat to the health of operators. Some organic substances (Freons) are harmful to the environment. The use of gaseous deacidification agents depends on expensive and complicated professional equipment. Inflammable and explosive safety hazards, and the residual amount of alkali is small

Method used

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  • Paper depickling solvent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] After cleaning 3kg Populus heterophylla leaves and 7kg Populus heterophylla bark, pulverize, cross 10 mesh sieves, add the mixed solution of water / acetone / glycerol (the volume of water, acetone and glycerol) of 10 times of powder weight The ratio is 1:0.7:1) extract 3 times at 70°C, filter, concentrate the filtrate to a relative density of 1.10-1.15, add ethanol after cooling to make the alcohol content 65%, stir well, let stand, filter, and recover the filtrate After ethanol, aging at 30°C for 72 hours, and filtering to obtain the extract of Populus heterophyllum.

[0035] Take 700g of Populus heterophyllum extract and add it to 9209g of water, stir and mix thoroughly, and filter; add 30g of nano-magnesium hydroxide, 60g of magnesium bicarbonate and 1g of lithium tetraborate to the filtrate, fully stir at 80°C and perform ultrasonic treatment for 0.5h; stand still Aging for 1 h to obtain the paper deacidifying agent.

Embodiment 2

[0037] Take 600 g of the Populus heterophyllum extract prepared in Example 1 and add it to 9339 g of water, fully stir and mix, and filter; add 1 g of nanometer calcium hydroxide, 30 g of calcium bicarbonate and 30 g of sodium tetraborate to the filtrate, fully stir at 70°C and perform ultrasonication Treat for 1 hour; stand and age for 2 hours to obtain the paper deacidifier.

Embodiment 3

[0039] Take Populus heterophyllum extract 500g prepared in Example 1 and add it to 9344g water, fully stir and mix, filter; add nano-calcium hydroxide 40g, nano-magnesium hydroxide 55g, potassium bicarbonate 1g and potassium tetraborate 60g in the filtrate, 50 ℃ Stir fully under the environment and perform ultrasonic treatment for 1 hour; stand and age for 4 hours to obtain the paper deacidifier.

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Abstract

The invention discloses a paper depickling solvent which is prepared from a cotton tree leaves extractive, soluble tetraborate, nanometer metal hydroxide, metal bicarbonate and water. The invention also discloses a preparation method of the paper depickling solvent. The preparation method comprises the following steps of (1) adding the cotton tree leaves extractive in water, and performing full stirring and mixing and filtration; (2) adding the nanometer metal hydroxide, the metal bicarbonate and the soluble tetraborate in a filtrate obtained in the step (1), and performing full stirring and ultrasonic treatment for 0.5-1.5h; and (3) performing still standing for ageing for 1-12h to obtain the paper depickling solvent. The paper depickling solvent provided by the invention is environmentally friendly and harmless without safety influences on a human body and an environment, is thorough and uniform in depickling, has enough alkali residues, is long in effect duration time and is difficult in acid return, does not have damage to paper, has certain antibacterial activity and is beneficial to long-term storage of the paper after being used.

Description

technical field [0001] The invention belongs to the field of paper deacidification, and relates to a paper deacidification agent and a preparation method thereof, in particular to a deacidification agent used in a plasma paper deacidification method. Background technique [0002] Libraries, archives, museums and other units have preserved tens of thousands of files, books, calligraphy and paintings, newspapers and other paper materials. These paper documents are the precious heritage of human civilization and have important historical and cultural value that cannot be copied. With the passage of time, affected by various factors, a large number of paper documents have become mildewed, pulverized and shattered, polluted and insect-eaten, etc. The protection of these cultural materials is facing severe challenges. In order to protect these acidified paper documents, a lot of research on paper deacidification has been carried out. The basic principle of paper deacidification ...

Claims

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Application Information

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IPC IPC(8): D21H21/14D21H25/18
CPCD21H21/14D21H25/18
Inventor 张溪文程旭东施文正徐绍艳
Owner HANGZHOU ZHONGCAI TECH CO LTD
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