CN110241649A - Paper sheet deacidification agent and preparation method thereof based on sodium phytate modified magnesium hydroxide - Google Patents
Paper sheet deacidification agent and preparation method thereof based on sodium phytate modified magnesium hydroxide Download PDFInfo
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- CN110241649A CN110241649A CN201910518387.2A CN201910518387A CN110241649A CN 110241649 A CN110241649 A CN 110241649A CN 201910518387 A CN201910518387 A CN 201910518387A CN 110241649 A CN110241649 A CN 110241649A
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- China
- Prior art keywords
- magnesium hydroxide
- preparation
- dispersion liquid
- sodium phytate
- deacidification agent
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/18—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00 of old paper as in books, documents, e.g. restoring
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Abstract
The present invention relates to a kind of paper sheet deacidification agent and preparation method thereof based on sodium phytate modified magnesium hydroxide.First magnesium hydroxide, sodium phytate are dispersed in deionized water, in alcoholic solution respectively, then two kinds of dispersion liquids are mixed in proportion and are modified, the magnesium hydroxide being modified then is dispersed in PF 5070, petroleum ether in the mixed solvent, obtains target deacidification agent.The deacidification agent raw material are easy to get, and reaction condition is mild, and method of preparation and use is simple and convenient, and dosage is few, high-efficient, and deacidification effect is good and uniform.
Description
Technical field
The present invention relates to book and file processing and Chemical composition that technical fields, and in particular to one kind is modified based on sodium phytate
Paper sheet deacidification agent of magnesium hydroxide and preparation method thereof.
Background technique
Currently, in store ten hundreds of preciousnesses, successive dynasties remnants in various libraries, China, museum, archival agency
The cultural heritages such as books, calligraphy and painting, newspaper, archives, wherein mostly being write and being printed by hand-made paper or mechanical paper wood matter.With
The passage in years, paper document can gradually appear jaundice mildew, dusting fragmentation phenomena such as, mainly paper acidification caused by.Paper
The rotten macro manifestations of material be discoloration, it is microcosmic on be structure broken ring (mechanical strength decline).
Cellulose is the main component of paper, quite stable under neutral and weak basic condition, be not only difficult to hydrolyze and
It aoxidizes, and its hydrolysis rate increases according to a certain percentage with hydrogen ion concentration increase, i.e. lower (acid stronger) fiber of pH value
The hydrolysis rate of element is faster.The degree of polymerization reduces after cellulose hydrolysis, causes the intensity of paper material to decrease, finally shows
The embrittlement the result is that paper goes bad that is coming.
There is much sour source in paper, including substances, industrial development such as the sulphite, the alum that add in paper-making process
Lead to the brings acidic materials such as the sour gas gradually increased and external microbe, mould.The acidity of these different approaches
Substance is all the rotten major reason of paper document acidification.
The paper document deacidification technique being widely used at present specifically includes that solwution method and vapor phase method, and wherein vapor phase method exists
Technique is more complex, need vacuum cooperation, long processing period, equipment costly the deficiencies of；Solwution method is divided into aqueous systems and organic again
Two kinds of system, deacidification agent used in aqueous systems solwution method will lead to paper curl, adhesion, colour fading etc..Therefore using organic molten
Liquid in terms of papery depickling advantageously.Deacidification agent used in this method generally includes metal oxide or hydroxide (such as
Magnesia, magnesium hydroxide, calcium oxide, calcium hydroxide etc.) and organic solvent (fluoric ether).But due to the polarity of fluoric ether
It is very small, it is very poor in dispersibility wherein to lead to the substances such as magnesium hydroxide, magnesia, so improving depickling substance in organic solvent
In dispersibility be improve deacidification agent efficiency key factor.
Summary of the invention
It is above-mentioned various existing for existing paper sheet deacidification agent it is an object of the invention to overcome the problems, such as, a kind of preparation process is provided
Simply, deacidification agent easy to use, effect is good, preparation method are as follows:
Dispersion liquid A is prepared using magnesium hydroxide, water, prepares dispersion liquid B using sodium phytate, alcoholic solvent；By dispersion liquid A and divide
Dispersion liquid B heats reaction after mixing according to a certain percentage, obtains modified magnesium hydroxide；Modified magnesium hydroxide was dispersed in by perfluor heptan
The in the mixed solvent of alkane and petroleum ether composition.
Further, the concentration of dispersion liquid A is 1-10g/L, and the concentration of dispersion liquid B is 0.1-5g/L.
Further, the dispersion liquid B under room temperature is slowly dropped in 60-75 DEG C of dispersion liquid A when mixing, is added dropwise to complete
Afterwards in 60-75 DEG C of insulation reaction 1-3h, it is filtered, washed, dries while hot, obtain modified magnesium hydroxide.
Further, it is washed using 60-75 DEG C of alcoholic solvent, drying temperature is 30-45 DEG C, and drying time is
18-36h。
Further, the alcoholic solvent is specially dehydrated alcohol.
Further, the mass ratio of magnesium hydroxide and sodium phytate need to be controlled when dispersion liquid A is mixed with dispersion liquid B in 0.5-5:
Within the scope of 0.05-2.5.
Further, the mass ratio of in the mixed solvent PF 5070 and petroleum ether is 1530-1615:32-66.
Further, the mass ratio of modified magnesium hydroxide and mixed solvent is 0.01-0.5:100.
Further, modified magnesium hydroxide is dispersed in the mixed solvent by homogeneous, ultrasonic treatment.
Another object of the present invention is to provide the deacidification agents that one kind is prepared according to the method described above.
Magnesium hydroxide is modified with sodium phytate, the apparent activation energy of magnesium hydroxide can equally reduced, facilitates
Enhance the compatibility of magnesium hydroxide and organic solvent, improves dispersion of the magnesium hydroxide in PF 5070.Sodium phytate is a kind of heavy
The fully natural green additive wanted, most significant feature are stronger inoxidizability and color protection, and remaining sodium phytate is to paper
It opens and has no adverse effects.The two is made into dispersion liquid when dispersing magnesium hydroxide to titrate again, magnesium hydroxide can be made
It is more come into full contact with modifying agent, improves the degree of modification and modification degree of magnesium hydroxide.The polarity of PF 5070 is very low, using with
Its dissolve each other and polarity similar in petroleum ether do solubilizer, dispersion of the modified magnesium hydroxide in PF 5070 can be further increased
Property.
Compared with prior art, the invention has the following advantages: raw material are easy to get, reaction condition is mild, preparation and
Application method is simple and convenient, avoids using complicated, expensive vacuum equipment, has advantageously reduced cost；Using compound organic
Dicyandiamide solution reduces adverse effect of the deacidification to paper；Deacidification agent dosage is few, high-efficient, and deacidification effect is good and uniform.
Detailed description of the invention
Fig. 1 is magnesium hydroxide using the transmission electron microscope photo of method of modifying before and after the processing in the embodiment of the present invention 1.
Fig. 2 is paper document using the electromicroscopic photograph of deacidification agent depickling before and after the processing made from the embodiment of the present invention 1.
Specific embodiment
To make those of ordinary skill in the art fully understand technical solution of the present invention and beneficial effect, below in conjunction with specific
Embodiment is further described.
Embodiment 1
2g magnesium hydroxide powder is dispersed in 398g, in 70 DEG C of deionized waters, is uniformly mixing to obtain point that concentration is 5g/L
Dispersion liquid A.0.2g sodium phytate is added in 399.8g dehydrated alcohol, the dispersion liquid B that concentration is 0.5g/L is uniformly mixing to obtain.It will
Dispersion liquid B is slowly dropped in dispersion liquid A, is maintained the temperature of mixed solution to be 70 DEG C and is reacted 2 hours.It has reacted and has filtered while hot,
It is washed repeatedly 3 times with 70 DEG C of deionized waters, then filter cake is placed in 35 DEG C of environment and is dried in vacuo for 24 hours, obtain modified hydrogen-oxygen
Change magnesium.
1600g PF 5070 and 32g petroleum ether are mixed evenly, mixed solvent is obtained.By modification of the 2g after dry
Magnesium hydroxide is added in the mixed solvent, and gained mixture is transferred in homogenizer homogeneous 8min under the conditions of 8000r/min, so
Ultrasound 30min, as deacidification agent afterwards.
Embodiment 2
1.7g magnesium hydroxide powder is dispersed in 198.3g, in 70 DEG C of deionized waters, being uniformly mixing to obtain concentration is 8.5g/
The dispersion liquid A of L.0.2g sodium phytate is added in 199.8g dehydrated alcohol, the dispersion liquid that concentration is 1g/L is uniformly mixing to obtain
B.Dispersion liquid B is slowly dropped in dispersion liquid A, maintains the temperature of mixed solution to be 70 DEG C and reacts 2 hours.It has reacted and has taken out while hot
Filter, is washed 3 times repeatedly with 70 DEG C of deionized waters, then filter cake is placed in 35 DEG C of environment and is dried in vacuo for 24 hours, obtains modified hydrogen
Magnesia.
1615g PF 5070 and 35g petroleum ether are mixed evenly, mixed solvent is obtained.By 1.5g changing after dry
Property magnesium hydroxide is added in the mixed solvent, and gained mixture is transferred in homogenizer homogeneous 8min under the conditions of 8000r/min,
Then ultrasound 30min, as deacidification agent.
Comparative example 1
Magnesium hydroxide powder is placed in 35 DEG C of environment and is dried in vacuo for 24 hours, then directly by both itself and PF 5070 with
The ratio of 1:800 mixes, and gained mixture is transferred in homogenizer homogeneous 8min under the conditions of 8000r/min, then ultrasonic
30min, as deacidification agent.
Comparative example 2
Comparative example 2 and comparative example 1 are essentially identical, the difference is that: directly by magnesium hydroxide, PF 5070, petroleum ether
Three is mixed with the ratio of 1:800:40.
Comparative example 3
Comparative example 3 and comparative example 1 are essentially identical, the difference is that: directly by magnesium hydroxide, PF 5070, sodium phytate
Three is mixed with the ratio of 1:800:0.2.
Immersion depickling has been carried out to paper document using deacidification agent made from embodiment 1,2 and comparative example 1-3 at room temperature
It handles (soaking time 3min), then takes out air-dried.Deacidification agent and the test of treated paper performance are as shown in table 1 below.
The different deacidification agent deacidification effect tables of table 1
To embodiment 1 before modified after magnesium hydroxide carried out transmission electron microscope analysis, as a result as shown in Figure 1 (left side for be modified
Before, the right side is modified).As shown in Figure 1, become uneven and there is one layer of packet on surface by smooth by modified magnesium hydroxide surface
Object is wrapped up in, this shows the surface energy that magnesium hydroxide can be effectively reduced by modification, while modifying agent is coated in the form of clad
On magnesium hydroxide surface, be conducive to dispersion of the magnesium hydroxide in PF 5070.
Immersion depickling processing (soaking time has been carried out to paper document using deacidification agent made from embodiment 1 at room temperature
3min), then take out it is air-dried, by the microstructure change of scanning electron microscope analysis paper document depickling before and after the processing, as a result such as
(left side is before depickling, the right side is after depickling) shown in Fig. 2.As shown in Figure 2, by depickling, treated that paper fibre surface is attached with greatly
The solid particle of amount, and the structure of solid particle and the structure of nano-sized magnesium hydroxide are almost the same, explanation is magnesium hydroxide particle
It has been attached to paper fibre surface, has played the effect of depickling.
After the same method, influence of the soaking time to deacidification effect is had studied using deacidification agent made from embodiment 1,
The results are shown in Table 2.
Influence result table of 2 soaking time of table to deacidification effect
Above the results showed that soaking time is too short (1min or less), deacidification agent is less in paper surface adhesion amount, right
The processing of paper acidity is unobvious；Long soaking time (5min or more), pH value do not increase significantly, and macroscopically it is observed that
There is apparent white accumulation in paper surface, this will affect the Fundamental Physical Properties of paper.Soaking time is moderate both to can guarantee paper
The deacidification effect opened is significant, and can guarantee that the physical property of paper is basically unchanged, microcosmic upper deacidification agent adhesion amount foot on paper
Enough, macroscopically paper surface is without apparent white accumulation, therefore control soaking time is advisable for 1-5min.The experiment also illustrates,
PF 5070-petroleum ether composite solvent system short time immersion treatment influences the basic performances such as the brittleness of paper little.
Similar effect can also be obtained by carrying out above-mentioned experiment using deacidification agent made from embodiment 2.
Claims (10)
1. the preparation method of the paper sheet deacidification agent based on sodium phytate modified magnesium hydroxide, it is characterised in that the following steps are included: benefit
Dispersion liquid A is prepared with magnesium hydroxide, water, prepares dispersion liquid B using sodium phytate, alcoholic solvent；By dispersion liquid A and dispersion liquid B according to
Reaction is heated after certain proportion mixing, obtains modified magnesium hydroxide；Modified magnesium hydroxide is dispersed in by PF 5070 and petroleum
The in the mixed solvent of ether composition.
2. preparation method as described in claim 1, it is characterised in that: the concentration of dispersion liquid A is 1-10g/L, and dispersion liquid B's is dense
Degree is 0.1-5g/L.
3. preparation method as described in claim 1, it is characterised in that: be slowly dropped to the dispersion liquid B under room temperature when mixing
In 60-75 DEG C of dispersion liquid A, in 60-75 DEG C of insulation reaction 1-3h after being added dropwise to complete, it is filtered, washed, dries while hot, changed
Property magnesium hydroxide.
4. preparation method as claimed in claim 3, it is characterised in that: washed using 60-75 DEG C of alcoholic solvent, dry temperature
Degree is 30-45 DEG C, drying time 18-36h.
5. preparation method as described in claim 1, it is characterised in that: the alcoholic solvent is specially dehydrated alcohol.
6. preparation method as described in claim 1, it is characterised in that: hydroxide need to be controlled when dispersion liquid A is mixed with dispersion liquid B
The mass ratio of magnesium and sodium phytate is within the scope of 0.5-5:0.05-2.5.
7. preparation method as described in claim 1, it is characterised in that: the mass ratio of in the mixed solvent PF 5070 and petroleum ether
For 1530-1615:32-66.
8. preparation method as described in claim 1, it is characterised in that: the mass ratio of modified magnesium hydroxide and mixed solvent is
0.01-0.5:100。
9. preparation method as described in claim 1, it is characterised in that: modified magnesium hydroxide is uniform by homogeneous, ultrasonic treatment
It is dispersed in the mixed solvent.
10. a kind of paper sheet deacidification agent based on sodium phytate modified magnesium hydroxide, it is characterised in that the deacidification agent is wanted according to right
Any method in 1-9 is asked to be prepared.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910518387.2A CN110241649B (en) | 2019-06-15 | 2019-06-15 | Paper deacidification agent based on sodium phytate modified magnesium hydroxide and preparation method thereof |
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|---|---|---|---|
| CN201910518387.2A CN110241649B (en) | 2019-06-15 | 2019-06-15 | Paper deacidification agent based on sodium phytate modified magnesium hydroxide and preparation method thereof |
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| CN110241649A true CN110241649A (en) | 2019-09-17 |
| CN110241649B CN110241649B (en) | 2021-08-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116676807A (en) * | 2023-05-17 | 2023-09-01 | 中国人民大学 | Paper deacidification dispersion liquid and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105088870A (en) * | 2015-07-15 | 2015-11-25 | 国家图书馆 | Paper deacidification agent, and paper deacidification system and method thereof |
| CN105862513A (en) * | 2016-04-22 | 2016-08-17 | 国家图书馆 | Paper deacidifying solution and preparation method thereof |
| CN107012736A (en) * | 2017-05-03 | 2017-08-04 | 清华大学 | A kind of depickling liquid for having strengthening for paper effect concurrently and preparation method thereof |
-
2019
- 2019-06-15 CN CN201910518387.2A patent/CN110241649B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105088870A (en) * | 2015-07-15 | 2015-11-25 | 国家图书馆 | Paper deacidification agent, and paper deacidification system and method thereof |
| CN105862513A (en) * | 2016-04-22 | 2016-08-17 | 国家图书馆 | Paper deacidifying solution and preparation method thereof |
| CN107012736A (en) * | 2017-05-03 | 2017-08-04 | 清华大学 | A kind of depickling liquid for having strengthening for paper effect concurrently and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116676807A (en) * | 2023-05-17 | 2023-09-01 | 中国人民大学 | Paper deacidification dispersion liquid and preparation method and application thereof |
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