Multifunctional fogging agent for ancient book restoration, preparation method and application thereof

Abstract

This invention discloses a multifunctional atomizing agent for ancient book restoration, its preparation method, and its application, belonging to the field of ancient book preservation technology. The atomizing agent is a mixed solution containing chitosan quaternary ammonium salt and zirconium carbonate. The method for treating ancient books using this atomizing agent is as follows: after cleaning the ancient books to remove impurities, they are placed in a sealed deacidification device. The mixed solution of chitosan quaternary ammonium salt and zirconium carbonate is atomized and then introduced to spray the pages of the ancient books. The books are then dried in a ventilated environment at ambient temperature to complete the treatment. The atomizing agent and treatment method of this invention have multifunctional effects on ancient books, including deacidification, strengthening, consolidation, antibacterial properties, and anti-aging. It avoids the uneven treatment caused by the coffee ring effect and phenomena such as yellowing and fading. Furthermore, it simplifies the ancient book restoration process, enabling one-step atomization, significantly shortening the processing flow, reducing processing operations, shortening the processing cycle, and significantly improving processing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of ancient book preservation technology. More specifically, it relates to a multifunctional ancient book restoration atomizing agent, its preparation method, and its application. Background Technology

[0002] my country boasts a long and rich history, with numerous ancient books and cultural relics of immeasurable value. However, these relics have suffered varying degrees of damage during their transmission. On one hand, transportation and preservation conditions are limited; on the other hand, the paper used in ancient Chinese bookmaking primarily utilizes plant fibers, relying on the stability of cellulose to maintain the paper's physical properties such as tear resistance and folding endurance. Therefore, over time, the paper is susceptible to natural erosion such as insect infestation, mold, acidification, and aging. The main factor influencing the aging and deterioration of ancient books is the hydrolysis of cellulose in the paper under acidic conditions, leading to the breakage of structural chains and a decrease in the degree of polymerization. The stronger the acidity, the faster the aging of the ancient book, the lower its usability, and in severe cases, it can become brittle and even crumble into dust. Therefore, the protection and restoration of ancient books is crucial, and the first step in solving the problem of damage to ancient books is to deacidify and protect the paper, thereby improving its strength.

[0003] In recent years, domestic research on the deacidification and preservation of ancient books has gradually increased, and certain results have been achieved. He et al. proposed an efficient method for deacidifying and strengthening aged paper through in-situ quaternization. The properties of the treated aged paper were improved, with a pH value in the range of 7.5-9.0, a maximum alkali storage capacity of 220 mmol / kg, and tensile strength and folding endurance increased by 28.05% and 80%, respectively. It also has good antibacterial and anti-aging properties. However, the deacidification and strengthening are achieved through coating and two rounds of atomization, which is relatively complicated and cannot achieve the effect of multifunctional ancient book preservation in a single treatment (CarbohydrPolym, 2019, 209:250-257.). Jia et al. proposed a novel method for paper manuscript preservation using chitosan nanoparticles as Lewis bases. This method can achieve deacidification and strengthening of paper in one step. The treated paper exhibits excellent durability in terms of pH, tensile strength, and folding resistance, and also shows good antibacterial properties. Although the chitosan nanoparticles are ball-milled, their heterogeneous system still suffers from problems such as easy sedimentation and uneven spraying (Coatings, 2020, 10: 1226.).

[0004] In addition, multifunctional atomized deacidifying agents have become a research hotspot in the field of ancient book preservation and restoration in recent years. Using an ultrasonic atomizer to atomize alkaline solutions into micron-sized droplets allows paper to fully absorb the deacidifying agent without wetting or deformation, thus increasing the alkalinity and durability of the deacidified paper. Qi Shi et al. applied calcium propionate and sodium carbonate aqueous solutions to paper via pressure atomization, forming calcium carbonate in situ to achieve deacidification and protection. The results showed that the pH value of the treated paper increased from 4.32 to 8.4, and the tensile index and folding endurance increased by 19% and 109%, respectively, while also exhibiting certain anti-mildew properties (China Pulp & Paper, 2022, 41, 52). Ren Junli et al. invented a multifunctional ancient book restoration solution and its treatment method (CN109518527B). This restoration solution consists of two parts: an alkaline mixed sol of metal oxide nanoparticles and surfactants dispersed in an inert solvent, and an alcohol-water mixed solution containing quaternary ammonium salts. Studies have shown that this ancient book treatment solution and method have multifunctional effects on ancient books, including deacidification, strengthening, antibacterial, and anti-aging. However, both of the above treatment methods are relatively complex, requiring soaking followed by atomization. Furthermore, the restoration solution is a heterogeneous system, and the coffee ring effect after soaking can easily lead to uneven treatment of the ancient books.

[0005] While there are numerous research findings on multifunctional deacidifying agents, most deacidification solutions for ancient books are heterogeneous systems. These systems not only fail to achieve multifunctional restoration and protection of ancient books in a single step, but also, due to the presence of solid nanoparticles, are prone to producing a coffee ring effect due to inconsistent solvent evaporation rates. This leads to uneven impregnation or atomization effects, causing secondary damage to ancient books and artifacts. Jiang Lihua et al. first used a modified calcium carbonate ethanol suspension for deacidification, and then used a reduced nanocellulose ethanol solution for spray reinforcement (CN116289318A). Ren Junli et al. used quaternary ammonium cationic cellulose modified with a dispersant alkyl ketone dimer, inorganic alkaline nanoparticles, and organic solvents to form an organic phase deacidification and enhancement restoration solution. The inorganic alkaline nanoparticles, such as magnesium oxide, magnesium hydroxide, and calcium carbonate nanoparticles, are solid particles insoluble in organic solvents. In treating paper, the coffee ring effect inevitably occurs, resulting in uneven deacidification and reinforcement effects (CN115874485A). In summary, current methods for the preservation and restoration of ancient books, both domestically and internationally, mainly focus on deacidification. Multifunctional methods for treating ancient books are relatively rare. Most treatment processes are quite complex, the treatment solutions are heterogeneous systems, and most are immersion treatments, making it difficult to achieve large-scale processing. Summary of the Invention

[0006] In view of the shortcomings and deficiencies of the existing technology, the primary objective of this invention is to provide a multifunctional ancient book restoration atomizing agent and its preparation method.

[0007] Another objective of this invention is to provide a simple and efficient method for processing ancient books based on the application of the aforementioned ancient book restoration atomizing agent.

[0008] The above-mentioned objective of this invention is achieved through the following technical solution:

[0009] A multifunctional ancient book restoration atomizing agent, wherein the multifunctional ancient book restoration atomizing agent is a homogeneous system mixed solution, the components of which include chitosan quaternary ammonium salt and zirconium carbonate ammonium.

[0010] Preferably, the mass fraction of chitosan quaternary ammonium salt in the mixed solution is 0.04% to 0.45%.

[0011] More preferably, the mass fraction of chitosan quaternary ammonium salt in the mixed solution is 0.20% to 0.45%.

[0012] Preferably, the mass fraction of ammonium zirconium carbonate in the mixed solution is 0.5% to 3.5%.

[0013] More preferably, the mass fraction of ammonium zirconium carbonate in the mixed solution is 1.5% to 3.5%.

[0014] Preferably, the solvent for the mixed solution is water, such as deionized water.

[0015] The preparation method of the multifunctional ancient book restoration atomizing agent described above is as follows: add chitosan quaternary ammonium salt to water and dissolve it (preferably by ultrasonic dissolution), then add zirconium carbonate ammonium and mix thoroughly by shaking to obtain the ancient book restoration atomizing agent.

[0016] Specifically, the ultrasonic dissolution power is 300-1500W.

[0017] Preferably, the ultrasonic dissolution power is 600W.

[0018] The application of the multifunctional ancient book restoration atomizing agent described above in the treatment of ancient books should also be within the scope of protection of this invention.

[0019] Specifically, the application method, also known as the ancient book restoration method, includes the following steps:

[0020] (1) Pre-treatment of ancient books: cleaning impurities from the surface of ancient books;

[0021] (2) Place the cleaned ancient books in a sealed container;

[0022] (3) The multifunctional ancient book restoration atomizing agent of the present invention is atomized and then introduced into a closed device to spray the ancient book pages.

[0023] (4) Dry the ancient books.

[0024] Specifically, the drying in step (4) can be carried out in a ventilated environment at ambient temperature.

[0025] Specifically, the atomization process in step (3) involves atomizing the prepared atomizing agent using an atomizing device with a power of 200W-1800W.

[0026] Preferably, the atomization power in step (3) is 400W.

[0027] Preferably, the treatment time for the spraying process in step (3) is 60 minutes.

[0028] Ancient books and artifacts treated with this multifunctional atomizing agent achieve international standards, with a pH between 7.0 and 8.5 and relatively uniform distribution. The alkali retention is between 150 and 880 mmol / kg, increasing the tensile strength of the paper by 20% to 60% and the bursting strength by 10% to 100%. The treated paper surface is clean and smooth, with no significant changes in the ink. It achieves a good three-in-one effect of deacidification, reinforcement, and antibacterial properties, enabling mass production.

[0029] This invention primarily utilizes the polymerization of zirconium oxide ions in an aqueous solution of zirconium carbonate (ammonium carbonate) to tightly bond with cellulose and other nucleophilic organic compounds containing alcohol hydroxyl groups in paper. The ammonium ions neutralize the acidic groups in the paper, achieving deacidification, reinforcement, and consolidation. Simultaneously, zirconium carbonate salts possess high chemical activity, acting as crosslinking agents in paper coatings and rapidly curing during the coating drying process, thus improving efficiency. Chitosan quaternary ammonium salts, under the alkaline conditions provided by zirconium carbonate, can undergo an in-situ chemical reaction with cellulose in the paper, causing some cellulose to become cationic. This cationic reaction then generates electrostatic interactions with the negatively charged cellulose, achieving reinforcement and imparting good antibacterial properties to the paper, preventing microbial growth, reducing damage to ancient books and artifacts, and extending their preservation time. The atomized deacidification treatment allows the deacidifying agent to be evenly dispersed on the ancient book pages, with short processing time, low atomizer consumption, and minimal impact on the paper, making it suitable for large-scale processing. Therefore, this invention has significant application value in the preservation of ancient books.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The ancient book restoration atomizing agent of the present invention has multiple functions such as deacidification, strengthening, consolidation, antibacterial and anti-aging effects on ancient books.

[0032] 2. The ancient book restoration atomizing agent of the present invention simplifies the treatment of ancient books into a one-step atomization process. While achieving the effects of deacidification, enhancement, reinforcement, antibacterial and anti-aging, it significantly shortens the treatment process, reduces the number of treatment operations, shortens the treatment cycle and improves the treatment efficiency.

[0033] 3. The ancient book restoration atomizing agent of the present invention is a homogeneous system, in which all functional substances are uniformly dissolved in the solution. During the atomization process, it can better adhere to the pages of ancient books, and there is no uneven treatment caused by the coffee ring effect due to the surface tension of heterogeneous liquids. Moreover, this homogeneous system will not settle, and there will be no uneven spraying.

[0034] 4. The components of the ancient book restoration atomizing agent of the present invention are all transparent and colorless liquids, which can ensure that the ancient books and cultural relics will not turn yellow or fade after atomization and deacidification, and the color difference and brightness remain basically unchanged before and after atomization and deacidification. Attached Figure Description

[0035] Figure 1 The curves show the comparison of tensile strength between the paper sample before atomization and deacidification and the paper samples treated in Examples 1, 3, 5, and 8.

[0036] Figure 2 This is a photograph of the paper sample after 28 days of anti-mildew testing in Example 2. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the embodiments do not limit the present invention in any way. Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in this technical field.

[0038] Unless otherwise specified, all reagents and materials used in the following examples are commercially available.

[0039] Example 1

[0040] 1. Preparation method of the multifunctional ancient book restoration atomizing agent in this embodiment: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then ammonium zirconium carbonate is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.3%, and the mass fraction of ammonium zirconium carbonate is 3%.

[0041] 2. Ancient book restoration method: Clean the impurities on the surface of the ancient book, place the cleaned ancient book in a sealed treatment device, and then atomize the prepared atomizing agent through a 400W atomizing device and pass it into the treatment device for 60 minutes. After that, place the ancient book in an ambient temperature environment to dry.

[0042] 3. Test methods: The paper samples treated in this embodiment were tested according to national standards for tensile strength (GB / T12914-2008), folding endurance (GB / T 457-2008), pH value (GB / T 13528-2015), and residual alkali content (GB / T24998-2010).

[0043] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 8.26, the residual alkali content was 650 mmol / kg, the tensile strength increased from 738 N / m to 1030 N / m (an increase of 40%), and the folding endurance increased from 20 to 28 times (double-page folding endurance test). The treated paper surface was smooth and clean, the text was clear, and there was no impact on the ink, nor any change in brightness or color difference. The repair atomizing agent prepared in this embodiment was sprayed evenly without the coffee ring effect. The tensile curve of the paper sample is shown in [reference needed]. Figure 1 .

[0044] The antibacterial properties of the paper treated according to this invention were tested:

[0045] The antibacterial effect was tested on the paper samples treated in Example 1. The antibacterial test was conducted by Guangzhou Institute of Microbiology Co., Ltd., based on the standard HG / T 3950-2007 Antibacterial Coatings. The test item was antifungal performance. The selected test strains were common Aspergillus niger AS 3.4463, Aspergillus terreus AS 3.3935, Paecilomyces wani AS 3.4253, Penicillium cordiformis AS 3.3875, Cladosporium buddingii AS 3.3984, and Chaetomium globulus AS 3.4254. The test conditions were 28 days, humidity > 90% RH, and temperature 28℃. The test results are as follows: Figure 2 As shown, the results indicate that no mold grew on the paper sample; that is, no growth was observed under a microscope (50x magnification), and the mold level was 0.

[0046] Example 2

[0047] 1. Preparation method of the multifunctional ancient book restoration atomizing agent in this embodiment: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then ammonium zirconium carbonate is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.04%, and the mass fraction of ammonium zirconium carbonate is 0.5%.

[0048] 2. The methods for restoring ancient books and the testing methods are the same as in Example 1.

[0049] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 7.33, the residual alkali content was 176 mmol / kg, the tensile strength increased from 738 N / m to 999 N / m (an increase of 35%), and the folding endurance increased from 20 to 25 times (double-page folding endurance test). The treated paper surface was smooth and clean, the text was clear, and there was no impact on the ink, nor any change in brightness or color difference. The repair atomizing agent prepared in this embodiment was sprayed evenly without the coffee ring effect.

[0050] Example 3

[0051] 1. Preparation method of the multifunctional ancient book restoration atomizing agent in this embodiment: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then ammonium zirconium carbonate is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.2%, and the mass fraction of ammonium zirconium carbonate is 1.0%.

[0052] 2. The methods for restoring ancient books and the testing methods are the same as in Example 1.

[0053] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 7.59, the residual alkali content was 230 mmol / kg, the tensile strength increased from 738 N / m to 1010 N / m (an increase of 37%), and the folding endurance increased from 20 to 25 times (double-page folding endurance test). The treated paper surface was smooth and clean, the writing was clear, and there was no impact on the ink, nor any change in brightness or color difference. The repair atomizing agent prepared in this embodiment was sprayed evenly without the coffee ring effect. The tensile strength of the paper sample is shown in [reference needed]. Figure 1 .

[0054] Example 4

[0055] 1. Preparation method of the multifunctional ancient book restoration atomizing agent in this embodiment: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then ammonium zirconium carbonate is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.30%, and the mass fraction of ammonium zirconium carbonate is 1.5%.

[0056] 2. The methods for restoring ancient books and the testing methods are the same as in Example 1.

[0057] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 7.85, the residual alkali content was 310 mmol / kg, the tensile strength increased from 738 N / m to 1020 N / m (an increase of 38%), and the folding endurance increased from 20 to 26 times (double-page folding endurance test). The treated paper surface was smooth and clean, the text was clear, and there was no impact on the ink, nor any change in brightness or color difference. The repair atomizing agent prepared in this embodiment was sprayed evenly without the coffee ring effect.

[0058] Example 5

[0059] 1. Preparation method of the multifunctional ancient book restoration atomizing agent in this embodiment: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then ammonium zirconium carbonate is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.40%, and the mass fraction of ammonium zirconium carbonate is 2.0%.

[0060] 2. The methods for restoring ancient books and the testing methods are the same as in Example 1.

[0061] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 8.06, the residual alkali content was 460 mmol / kg, the tensile strength increased from 738 N / m to 1033 N / m (an increase of 40%), and the folding endurance increased from 20 to 26 times (double-page folding endurance test). The treated paper surface was smooth and clean, the writing was clear, and there was no impact on the ink, nor any change in brightness or color difference. The repair atomizing agent prepared in this embodiment was sprayed evenly without the coffee ring effect. The tensile strength of the paper sample is shown in [reference needed]. Figure 1 .

[0062] Example 6

[0063] 1. Preparation method of the multifunctional ancient book restoration atomizing agent in this embodiment: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then ammonium zirconium carbonate is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.20%, and the mass fraction of ammonium zirconium carbonate is 2.0%.

[0064] 2. The methods for restoring ancient books and the testing methods are the same as in Example 1.

[0065] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 7.94, the residual alkali content was 460 mmol / kg, the tensile strength increased from 738 N / m to 1023 N / m (an increase of 39%), and the folding endurance increased from 20 to 26 times (double-page folding endurance test). The treated paper surface was smooth and clean, the text was clear, and there was no impact on the ink, nor any change in brightness or color difference. The repair atomizing agent prepared in this embodiment was sprayed evenly without the coffee ring effect.

[0066] Example 7

[0067] 1. Preparation method of the multifunctional ancient book restoration atomizing agent in this embodiment: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then ammonium zirconium carbonate is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.10%, and the mass fraction of ammonium zirconium carbonate is 3.0%.

[0068] 2. The methods for restoring ancient books and the testing methods are the same as in Example 1.

[0069] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 8.23, the residual alkali content was 624 mmol / kg, the tensile strength increased from 738 N / m to 1002 N / m (an increase of 36%), and the folding endurance increased from 20 to 22 times (double-page folding endurance test). The treated paper surface was smooth and clean, the text was clear, and there was no impact on the ink, nor any change in brightness or color difference. The repair atomizing agent prepared in this embodiment was sprayed evenly without the coffee ring effect.

[0070] Example 8

[0071] 1. Preparation method of the multifunctional ancient book restoration atomizing agent in this embodiment: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then ammonium zirconium carbonate is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.45%, and the mass fraction of ammonium zirconium carbonate is 3.5%.

[0072] 2. The methods for restoring ancient books and the testing methods are the same as in Example 1.

[0073] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 8.45, the residual alkali content was 700 mmol / kg, the tensile strength increased from 738 N / m to 1179 N / m (an increase of 60%), and the folding endurance increased from 20 to 28 times (double-page folding endurance test). The treated paper surface was smooth and clean, the writing was clear, and there was no impact on the ink, nor any change in brightness or color difference. The repair atomizing agent prepared in this embodiment was sprayed evenly without the coffee ring effect. The tensile strength of the paper sample is shown in [reference needed]. Figure 1 .

[0074] Comparative Example 1

[0075] 1. Preparation method of multifunctional ancient book restoration atomizing agent: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then ammonium zirconium carbonate is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.3%, and the mass fraction of ammonium zirconium carbonate is 5%.

[0076] 2. The methods for restoring ancient books and the testing methods are the same as in Example 1.

[0077] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 8.63, the residual alkali content was 834 mmol / kg, the tensile strength increased from 738 N / m to 1001 N / m, an increase of 36%, and the folding endurance increased from 20 times to 22 times (double-page folding endurance test). After treatment, the paper surface was wrinkled, easy to curl, the ink was slightly blurred, the brightness was darkened, and the paper turned yellowish.

[0078] Comparative Example 2

[0079] 1. Preparation method of multifunctional ancient book restoration atomizing agent: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then ammonium zirconium carbonate is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.1%, and the mass fraction of ammonium zirconium carbonate is 5%.

[0080] 2. The methods for restoring ancient books and the testing methods are the same as in Example 1.

[0081] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 8.63, the residual alkali content was 873 mmol / kg, the tensile strength increased from 738 N / m to 802 N / m, an increase of 8.7%, the folding endurance decreased from 20 times to 15 times (double-page folding endurance test), the treated paper surface was wrinkled and easy to curl, the writing was clear, there was no effect on the ink, the brightness was darker, and the paper was slightly yellow.

[0082] Comparative Example 3

[0083] 1. Preparation method of multifunctional ancient book restoration atomizing agent: Chitosan quaternary ammonium salt is dissolved in deionized water and ultrasonically dissolved with a power of 600W; then zirconium carbonate ammonium is added and thoroughly shaken and mixed to obtain the multifunctional ancient book restoration atomizing agent; the mass fraction of chitosan quaternary ammonium salt in the atomizing agent is 0.3%, and the mass fraction of zirconium carbonate ammonium is 0.1%.

[0084] 2. The methods for restoring ancient books and the testing methods are the same as in Example 1.

[0085] Test results showed that the pH of the paper sample after atomization treatment increased from 5.10 to 5.80, which did not meet the requirements for deacidification. The residual alkali content was not measured. The tensile strength increased from 738 N / m to 1020 N / m, an increase of 38%. The folding endurance increased from 20 times to 26 times (double-page folding endurance test). The surface of the treated paper was smooth and clean, the text was clear, and there was no impact on the ink, nor any change in brightness or color difference.

[0086] Finally, it should be noted that the above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention.

Claims

1. A multifunctional ancient book restoration atomizing agent, characterized in that, The atomizing agent is a mixed solution containing chitosan quaternary ammonium salt and zirconium carbonate ammonium; the solvent of the mixed solution is water, the mass fraction of chitosan quaternary ammonium salt in the mixed solution is 0.04%~0.45%, and the mass fraction of zirconium carbonate ammonium in the mixed solution is 0.5%~3.5%.

2. The multifunctional ancient book restoration atomizing agent as described in claim 1, characterized in that, The preparation method is as follows: add chitosan quaternary ammonium salt to water, dissolve it, add zirconium ammonium carbonate, and mix thoroughly by shaking to obtain the ancient book restoration atomizing agent.

3. The application of the multifunctional ancient book restoration atomizing agent as described in claim 1 or 2 in the treatment of ancient books.

4. A method for restoring ancient books, characterized in that, Includes the following steps: (1) Pre-treatment of ancient books: cleaning impurities from the surface of ancient books; (2) Place the cleaned ancient books in a sealed container; (3) The multifunctional ancient book restoration atomizing agent described in claim 1 or 2 is atomized and then introduced into a sealed device to spray the ancient book pages. (4) Dry the ancient books.

5. The method according to claim 4, characterized in that, The drying process described in step (4) is ventilated drying at ambient temperature.

6. The method according to claim 4, characterized in that, The spray treatment time in step (3) is 60 min.

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