A medium alkaline sizing solution for calligraphy and painting and preparation method thereof

Abstract

The invention provides a medium alkaline sizing solution for painting and calligraphy and a preparation method thereof, wherein the sizing solution contains the following components: 0.01-2wt% of alkyl ketene dimer, 0.01-2wt% of cationic etherified starch, 0.001-0.01wt% of quaternary ammonium salt emulsifier, 0.1-5wt% of gelatin and the remainder of water. The medium alkaline sizing solution for painting and calligraphy has a neutral or weak alkalinity, uniform composition, stable properties, certain antibacterial properties, and can replace traditional glue alum water and be directly applied to the sizing solution for painting and calligraphy paper.

Description

Technical Field

[0001] The present application relates to the field of traditional calligraphy and painting creation and paper cultural relic mounting and restoration, and specifically, to a medium-alkaline sizing solution for calligraphy and painting and a preparation method thereof. Background Art

[0002] As early as the Tang Dynasty, the technology of using animal glue to replace plant glue to glue paper was invented. Compared with plant glue, animal glue has a better sizing effect. It can not only achieve a higher sizing degree, but also make the ink color of writing and painting darker and brighter. However, gelatin particles are negatively charged like paper fibers. Alum is needed as a cationic precipitant to spread the gelatin evenly on the fibers to form a uniform glue film. This can avoid ink leakage and gray ink. Alum also has certain antibacterial properties, which can effectively prevent animal glue from spoiling and mold, and maintain the good state of paper and works.

[0003] In practical applications, gelatin and alum are usually mixed into gelatin alum water in a certain proportion and applied to the surface of paper to make the paper have a certain degree of water resistance, which meets the needs of calligraphy, fine brushwork and other creations. In particular, in the creation of traditional fine brushwork, because of the fine strokes, not only is it necessary to use cooked paper with gelatin alum, but also gelatin alum water is often used to cover the painted strokes in order to prevent the superposition of pigments from causing interference during the dyeing process. The dyeing + gelatin alum + dyeing process is repeated many times, which is the so-called "three alums and nine dyeings". In addition, some paper-based ancient calligraphy and paintings, ancient maps, archival manuscripts and other paper-based cultural relics often need to be manually repaired and mounted during the protection and restoration process of aging and damaged calligraphy and painting cultural relics. Gum alum water containing alum is also a very important color fixer in this process. It is mainly used for color fixing of easy-to-bleed pigments, color fixation and layer isolation in the process of connecting calligraphy and painting and full color.

[0004] Due to the above advantages, alum water plays an important role in the traditional restoration and mounting technology system. However, in addition to these advantages, alum water also has a fatal flaw. Its main component, alum (potassium aluminum sulfate), is acidic when hydrolyzed, forming SO 4 2- and HSO 4 - The main components of paper, cellulose and hemicellulose, will undergo acidic hydrolysis under acidic conditions, accelerating the acidification and aging of paper. Therefore, after being sizing with alum water or repairing and mounting, the related paper or calligraphy and painting works will accelerate acidification. Usually, it only takes a few decades for the paper carrier to show obvious brittleness, shortening the preservation life of calligraphy and paintings and related paper cultural relics, until they are destroyed. Summary of the invention

[0005] The purpose of the present invention is to provide a medium-alkaline sizing solution for calligraphy and painting, which has uniform composition, stable properties, certain antibacterial properties, and can prevent paper cultural relics from acidification and embrittlement.

[0006] In order to achieve the above-mentioned purpose, the present disclosure provides a medium alkaline sizing solution for calligraphy and painting, which contains the following components: 0.01-2wt% alkyl ketene dimer, 0.01-2wt% cationic etherified starch, 0.001-0.01wt% quaternary ammonium salt emulsifier, 0.1-5wt% gelatin and the balance water.

[0007] Optionally, the sizing solution contains the following components: 0.03-0.07 wt % of alkyl ketene dimer, 0.03-0.07 wt % of cationic etherified starch, 0.002-0.005 wt % of quaternary ammonium salt emulsifier, 0.6-0.9 wt % of gelatin and the balance of water.

[0008] Optionally, the quaternary ammonium salt emulsifier is polydiallyldimethylammonium chloride and / or methacryloyloxyethyltrimethylammonium chloride.

[0009] Optionally, the structure of the polydiallyldimethylammonium chloride is as shown in formula (1):

[0010]

[0011] The structure of methacryloyloxyethyl trimethylammonium chloride is shown in formula (2):

[0012]

[0013] Optionally, the pH of the sizing solution is 6.5-8.0, preferably 7.0-7.5.

[0014] The viscosity of the cationic etherified starch is 100-2000 mpa.S, preferably 460-1200 mpa.S;

[0015] The gelatin has a freezing strength of 20-500 Bloom g, preferably 120-300 Bloom g.

[0016] The second aspect of the present disclosure provides a method for preparing the above-mentioned medium-alkaline sizing solution for calligraphy and painting, and the preparation method comprises the following steps:

[0017] S1, heating the aqueous solution containing cationic etherified starch in a water bath until the cationic etherified starch is gelatinized, and performing a first stirring to obtain a first solution;

[0018] S2, adding alkyl ketene dimer and quaternary ammonium salt emulsifier to the first solution, performing a second stirring to obtain a first emulsion;

[0019] S3. After dissolving gelatin in water, add the first emulsion into the water and mix evenly to obtain the medium-alkaline sizing solution for calligraphy and painting.

[0020] Optionally, the water bath heating conditions include: heating the aqueous solution containing the cationic etherified starch to 90-98°C, preferably 94-96°C.

[0021] Optionally, the first stirring conditions include: a stirring speed of 8000-14000 rpm, preferably 10000-12000 rpm; and a stirring time of 2-15 min, preferably 5-10 min.

[0022] Optionally, the second stirring conditions include: a stirring speed of 8000-14000 rpm, preferably 10000-12000 rpm; and a stirring time of 5-20 min, preferably 10-15 min.

[0023] Through the above technical scheme, the present invention provides a medium-alkaline sizing solution for calligraphy and painting and a preparation method thereof. The sizing solution can be neutral or weakly alkaline, avoiding the problems of paper acidification and brittleness caused by the use of alum water in traditional sizing solutions, and has high antibacterial properties, thereby extending the preservation life of paper cultural relics.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0026] Figure 1 The inking effect of the paper after sizing in Examples 1-2 and Comparative Example 1 is shown.

[0027] Figure 2 The color fixing effect of the paper after sizing in Examples 1-2 and Comparative Example 1.

[0028] Figure 3 The pH changes of the paper after sizing in Examples 1-2 and Comparative Example 1 during the artificial accelerated aging process.

[0029] Figure 4 The tensile index changes of the paper in Examples 1-2 and Comparative Example 1 after sizing during artificial accelerated aging are shown. DETAILED DESCRIPTION

[0030] The specific embodiments of the present disclosure are described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0031] The first aspect of the present disclosure provides a medium alkaline sizing solution for painting and calligraphy, which contains the following components: 0.01-2wt% alkyl ketene dimer, 0.01-2wt% cationic etherified starch, 0.001-0.01wt% quaternary ammonium salt emulsifier, 0.1-5wt% gelatin and the balance water.

[0032] The medium-alkaline sizing solution for calligraphy and painting provided by the present invention retains gelatin, the main component of traditional glue alum water, and retains and follows the original usage habits and operating methods of calligraphy and painting creators and calligraphy and painting cultural relics mounting and restoration workers to the greatest extent, and can prevent acidification and embrittlement of calligraphy and painting and calligraphy and painting cultural relics, thereby extending the preservation life of cultural relics.

[0033] In the present invention, cationic starch is used as a precipitant to replace traditional alum to precipitate gelatin molecules on paper fibers to form a stable and uniform glue film, so that the surface of the paper after sizing has good water resistance; or it is covered on the surface of pigment ink to achieve the functions of covering and fixing the color and avoid the occurrence of ink leakage and ink bleeding.

[0034] Optionally, the sizing solution contains the following components: 0.01-2 wt% of alkyl ketene dimer, 0.01-2 wt% of cationic etherified starch, 0.001-0.01 wt% of quaternary ammonium salt emulsifier, 0.1-5 wt% of gelatin and the balance of water.

[0035] Optionally, the quaternary ammonium salt emulsifier is polydiallyldimethylammonium chloride and / or methacryloyloxyethyltrimethylammonium chloride.

[0036] In the present invention, a quaternary ammonium salt emulsifier is used to fully emulsify the oily alkyl ketene dimer to form a stable emulsion in a cationic etherified starch solution. After being applied on the paper surface, the alkyl ketene dimer can be evenly spread. At the same time, the quaternary ammonium salt emulsifier also has certain antibacterial properties, which can effectively prevent the glue from spoiling and mildewing.

[0037] Optionally, the structure of the polydiallyldimethylammonium chloride is as shown in formula (1):

[0038]

[0039] The structure of methacryloyloxyethyl trimethylammonium chloride is shown in formula (2):

[0040]

[0041] Optionally, the pH of the sizing solution is 6.5-8.0, preferably 7.0-7.5.

[0042] Optionally, the viscosity of the cationic etherified starch is 100-2000 mpa.S, preferably 460-1200 mpa.S;

[0043] The gelatin has a freezing strength of 20-500 Bloom g, preferably 120-300 Bloom g.

[0044] The second aspect of the present disclosure provides a method for preparing the medium alkaline sizing solution for calligraphy and painting described in the first aspect, the preparation method comprising the following steps:

[0045] S1, heating the aqueous solution containing cationic etherified starch in a water bath until the cationic etherified starch is gelatinized, and performing a first stirring to obtain a first solution;

[0046] S2, adding alkyl ketene dimer and quaternary ammonium salt emulsifier to the first solution, performing a second stirring to obtain a first emulsion;

[0047] S3, after dissolving gelatin in water, adding the first emulsion thereto and mixing evenly to obtain the medium alkaline sizing solution for painting and calligraphy.

[0048] Optionally, the water bath heating conditions include: heating the aqueous solution containing the cationic etherified starch to 90-98°C, preferably 94-96°C.

[0049] Optionally, the first stirring conditions include: a stirring speed of 8000-14000 rpm, preferably 10000-12000 rpm; and a stirring time of 2-15 min, preferably 5-10 min.

[0050] Optionally, the second stirring conditions include: a stirring speed of 8000-14000 rpm, preferably 10000-12000 rpm; and a stirring time of 5-20 min, preferably 10-15 min.

[0051] The present disclosure is further described in detail by examples below. The raw materials used in the examples of the present disclosure can be obtained through commercial channels. Specifically, cationic etherified starch was purchased from Hefei Jinu Biotechnology Co., Ltd. with a CAS number of 56780-58-6; alkyl ketene dimer was purchased from Hefei Jinu Biotechnology Co., Ltd. with a CAS number of 144245-85-2; polydiallyldimethylammonium chloride was purchased from Hefei Jinu Biotechnology Co., Ltd. with a CAS number of 26062-79-3; gelatin was purchased from Shanghai McLean Biochemical Technology Co., Ltd. with a CAS number of 900-70-8.

[0052] Example 1

[0053] Preparation of medium alkaline sizing solution for calligraphy and painting:

[0054] 16 g of cationic etherified starch was added to 800 mL of water and stirred evenly, and heated in a water bath to 95° C. After the cationic etherified starch was fully gelatinized, a high shear homogenizer was used to stir at a speed of 10,000 rpm for 5 minutes to obtain a first solution;

[0055] Slowly add 15 g of alkyl ketene dimer and 1.5 mL of polydiallyldimethylammonium chloride solution to the first solution, and continue stirring for 10 minutes to obtain a first emulsion;

[0056] Add 7.5g of gelatin to 970mL of water and soak for 1 hour, then heat to 70℃ until the gelatin is dissolved to obtain a gelatin solution. Take 30mL of the first emulsion and add it to the gelatin solution. Stir evenly to obtain a medium-alkaline sizing solution for calligraphy and painting.

[0057] The viscosity of the cationic etherified starch used in this example is 460-1200 mPa.S (6%, 95° C.), the concentration of the polydiallyldimethylammonium chloride solution is 40 wt %, and the freezing strength of the gelatin is 260 g Bloom.

[0058] Use a brush to dip the above-mentioned medium-alkaline sizing solution and evenly apply it on the front of the paper. After it dries naturally, apply it again evenly. Hang the paper vertically and wait for it to dry naturally.

[0059] The paper used in this example has a basis weight of 25 g / m 2 Pure leather single Xuan.

[0060] Example 2

[0061] 15 g of cationic etherified starch was added to 800 mL of water and stirred evenly. The mixture was heated to 95° C. in a water bath until the cationic etherified starch was fully gelatinized. The mixture was stirred at a speed of 10,000 rpm for 5 minutes using a high shear homogenizer to obtain a first solution.

[0062] Slowly add 15 g of alkyl ketene dimer and 1.5 mL of polydiallyldimethylammonium chloride solution to the first solution and continue stirring for 10 minutes to prepare a first emulsion;

[0063] Add 7.5g of gelatin to 970mL of water and soak for 1 hour, then heat to 70°C to dissolve the gelatin, add 35mL of the first emulsion to the gelatin solution, stir evenly, and you can get a medium-alkaline sizing solution for painting and calligraphy.

[0064] The viscosity of the cationic etherified starch used in this example is 460-1200 mPa.S (6%, 95°C, the concentration of the polydiallyldimethylammonium chloride solution is 40 wt%, and the gelatin has a freezing strength of 260 g Bloom.

[0065] Pour the above-mentioned medium-alkaline sizing liquid for calligraphy and painting into a square shallow dish, place the paper face down on the liquid surface, soak it with the liquid, gently pull it up along the wall of the dish, hang it to dry, then repeat this method of applying glue once, and hang the paper to dry naturally at room temperature.

[0066] The paper used in this example has a basis weight of 25 g / m 2 Pure leather single Xuan.

[0067] Comparative Example 1

[0068] Soak 6g of gelatin in 700mL of water for 1 hour, then heat it to 70℃ to completely dissolve it; dissolve 3g of alum in 100mL of water, pour it into the gelatin solution and stir evenly to make gelatin alum water.

[0069] Use a brush to dip into the glue alum water and brush it evenly on the front of the paper. After it dries naturally, brush it evenly again. Hang the paper vertically and wait for it to dry naturally.

[0070] The paper used in this comparative example is 25 g / m 2 Pure leather single Xuan.

[0071] Test Example 1

[0072] This test example applies diluted Chinese painting pigments to the paper in Example 1, Example 2, and Comparative Example 1 to test whether the ink color is spread evenly, whether there is ink leakage and ink bleeding, and whether the inking can be evenly rendered. The results are as follows Figure 1 As shown; the paper in Example 1, Example 2, and Comparative Example 1 was randomly painted with diluted Chinese painting pigments for a few strokes and then dried, and then a layer of glue used in the example was brushed on the strokes respectively. After drying, the strokes were painted with a brush dipped in clean water to observe whether the strokes were smudged and to examine the color fixing effect. The results are as follows Figure 2 ; The pH of the medium alkaline sizing solution in Example 1 and Example 2 and the glue alum water in Comparative Example 1 were tested, and the results are shown in Table 1 below; the paper in Example 1, Example 2 and Comparative Example 1 was subjected to artificial accelerated aging treatment, and the changes in the surface pH and folding endurance of the paper during the aging process were tested. The results are shown in Table 1 below. Figure 3 , Figure 4 shown.

[0073] Table 1

[0074] Example 1 Example 2 Comparative Example 1 pH value of glue 7.3 7.5 4.1

[0075] The results show that the paper coated with the sizing solution prepared in Example 1 and Example 2 maintains good pH and tensile strength during the aging process. The pH of the glue alum water in Comparative Example 1 is low, and the pH of the paper coated with the glue alum water continues to decrease after aging, and the tensile strength decreases rapidly. It can be seen that the sizing solution for calligraphy and painting provided by the present disclosure is neutral or weakly alkaline, which can give the paper good water resistance, avoid the acidification problem of the paper caused by the glue alum water, avoid the corruption and mildew of the glue solution, and at the same time can cover the surface of the pigment ink to achieve the color covering and color fixing functions, and avoid the phenomenon of ink leakage and ink bleeding.

[0076] The preferred embodiments of the present disclosure are described in detail above; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0077] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0078] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A medium alkaline sizing solution for painting and calligraphy, characterized in that: The sizing solution contains the following components: 0.01-2wt% of alkyl ketene dimer, 0.01-2wt% of cationic etherified starch, 0.001-0.01wt% of quaternary ammonium salt emulsifier, 0.1-5wt% of gelatin and the balance of water.

2. The sizing solution according to claim 1, wherein The sizing solution contains the following components: 0.03-0.07 wt% of alkyl ketene dimer, 0.03-0.07 wt% of cationic etherified starch, 0.002-0.004 wt% of quaternary ammonium salt emulsifier, 0.6-0.9 wt% of gelatin and the balance of water.

3. The sizing solution according to claim 1, wherein The quaternary ammonium salt emulsifier is polydiallyldimethylammonium chloride and / or methacryloyloxyethyltrimethylammonium chloride.

4. The sizing solution according to claim 3, wherein The structure of the polydiallyldimethylammonium chloride is shown in formula (1): The structure of methacryloyloxyethyl trimethylammonium chloride is shown in formula (2):

5. The sizing solution according to claim 1, wherein The pH of the sizing solution is 6.5-8.0, preferably 7.0-7.

5.

6. The sizing solution according to claim 1, wherein The viscosity of the cationic etherified starch is 100-2000 mpa.S, preferably 460-1200 mpa.S; The gelatin has a freezing strength of 20-500 Bloom g, preferably 120-300 Bloom g.

7. The method for preparing the medium alkaline sizing solution for painting and calligraphy as claimed in any one of claims 1 to 6, characterized in that: The preparation method comprises the following steps: S1, heating the aqueous solution containing cationic etherified starch in a water bath until the cationic etherified starch is gelatinized, and performing a first stirring to obtain a first solution; S2, adding alkyl ketene dimer and quaternary ammonium salt emulsifier to the first solution, performing a second stirring to obtain a first emulsion; S3. After dissolving gelatin in water, add the first emulsion into the water and mix evenly to obtain the medium-alkaline sizing solution for calligraphy and painting.

8. The preparation method according to claim 7, wherein: The conditions for water bath heating include: heating the aqueous solution containing cationic etherified starch to 90-98°C, preferably 94-96°C.

9. The preparation method according to claim 7, wherein: The first stirring conditions include: a stirring speed of 8000-14000 rpm, preferably 10000-12000 rpm; and a stirring time of 2-15 min, preferably 5-10 min.

10. The preparation method according to claim 7, wherein: The second stirring conditions include: a stirring speed of 8000-14000 rpm, preferably 10000-12000 rpm; and a stirring time of 5-20 min, preferably 10-15 min.

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