Water-reactive self-healing backwater pressure-resistant impermeable waterproof coating and preparation method thereof

Abstract

The application provides a water-reactive self-healing backwater pressure-resistant anti-permeation waterproof coating, which comprises Portland cement, titanium white, quartz sand, metakaolin, hydroxypropyl methyl cellulose, water reducing agent, powder defoaming agent, vinyl acetate-ethylene copolymer, and self-repairing waterproof microcapsule; the self-repairing waterproof microcapsule comprises wall material and core material, wherein the wall material comprises dialdehyde nanocellulose, carboxymethyl chitosan and sodium alginate, and the effective component of the core material is a permeation crystallization master batch. The Schiff base in the wall material can endow the self-healing ability. Meanwhile, the multiple hydrogen bond networks formed by the multiple groups in the wall material and the ion crosslinking between the calcium ions in the permeation crystallization master batch and sodium alginate can jointly enhance the stability of the microcapsule and the long-acting protection ability of the core material. The permeation crystallization master batch in the application can react with the concrete base material when meeting water, so as to improve the waterproof and anti-permeation ability of the backwater side.

Description

Technical Field

[0001] This invention relates to the field of building materials production technology, specifically to a water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating and its preparation method. Background Technology

[0002] With the continuous expansion of the depth and scale of urban underground space development and utilization (such as basements, underground garages, and equipment rooms), the waterproofing reliability of basement structures has become a core indicator for ensuring the normal use of underground spaces. The main structures of basements, such as shear walls and roof slabs, are under complex stress for extended periods: subjected to the long-term effects of external backfill lateral pressure and groundwater back pressure, they are prone to micro-displacement, leading to concrete cracks. Once these cracks form, groundwater can seep into the interior, affecting the space's functionality. However, after most basement construction is completed, the concrete perimeter has already been backfilled, making it impossible to excavate the water-facing side for repair. Waterproofing and leak sealing can only be implemented on the back side. Therefore, waterproofing materials suitable for back-water pressure conditions and capable of crack repair have become a key requirement for the later maintenance of underground projects. Their synergistic reactivity with the concrete substrate and long-term repair capabilities are also a focus of industry attention.

[0003] The current mainstream solution for sealing leaks under backwater pressure in basements is based on penetrating crystalline waterproofing materials. These materials, primarily composed of silicate-based active substances, are applied to the concrete substrate on the backwater side of the basement during construction. The active substances penetrate into the pores within the concrete. When cracks form and groundwater seeps in, the active substances react with the water and cement components in the concrete matrix, undergoing a crystallization reaction to fill the cracks and seal the seepage channels, thus achieving leak sealing under backwater pressure. Some technical solutions further enhance the initial sealing efficiency by adjusting the particle size of the active substances and adding auxiliary penetrating agents to increase their penetration depth in the concrete.

[0004] However, existing penetrating crystalline waterproofing materials have significant drawbacks: First, the active substances are easily consumed and become ineffective prematurely. Since their reaction requires simultaneous contact with water and cement components in concrete, and the back side of a basement is in a humid environment for a long time, even if no cracks appear, the active substances will continue to react with the cement in the concrete matrix and the ambient moisture, consuming their activity prematurely and shortening the material's service life. Second, they lack long-term, multiple-repair capabilities. The active substances can only complete one crystallization reaction. If the basement develops secondary or tertiary cracks due to later load and water pressure fluctuations, the material will have no remaining active substances to react with water and cement, making multiple repairs impossible. Repeated re-construction is required, significantly increasing maintenance costs.

[0005] In conclusion, a new technical solution is urgently needed to address the problems existing in the current technology. Summary of the Invention

[0006] To address the shortcomings and deficiencies of existing technologies, this invention provides a self-healing, water-reactive, pressure-resistant, and seepage-resistant waterproof coating and its preparation method. This invention combines microencapsulation technology with infiltration crystallization technology. When applied to concrete, the coating exhibits excellent pressure resistance and seepage resistance, self-healing upon contact with water, and also possesses a certain degree of antibacterial effect, making it well-suited for backwater surfaces such as basements. The wall material of the microcapsules in this invention possesses self-healing capabilities and good stability, significantly extending the effective protection period of the coating and reducing equipment maintenance costs. Furthermore, the preparation method of this invention is simple and convenient to apply.

[0007] One object of the present invention is to provide a water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating, wherein the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating comprises the following components in parts by weight: 400-500 parts of silicate cement 30-60 parts of titanium dioxide 300-400 parts of quartz sand 30-80 parts of metakaolin 1-5 parts of hydroxypropyl methylcellulose 1-3 parts water-reducing agent 1-3 parts powdered defoamer 30-100 parts of vinyl acetate-ethylene copolymer 30-100 portions of self-healing waterproof microcapsules; The self-healing waterproof microcapsule includes a wall material and a core material. The wall material includes dialdehyde nanocellulose, carboxymethyl chitosan, and sodium alginate, while the effective component of the core material is a penetrating crystallization masterbatch.

[0008] Furthermore, the permeation crystallization masterbatch is selected from one or more of zirconium silicate, silicate, aluminate, sulfoaluminate, and carbonate.

[0009] Furthermore, the wall material comprises the following parts by weight of raw materials: 1-3 parts of dialdehyde nanocellulose 1-5 parts of carboxymethyl chitosan 2-5 parts sodium alginate.

[0010] Furthermore, the preparation method of the dialdehyde nanocellulose includes the following steps: Under light-protected conditions, cellulose and sodium periodate were mixed, the pH was adjusted with sulfuric acid, the reaction was heated, and the mixture was purified to obtain dialdehyde nanocellulose.

[0011] Furthermore, the mass ratio of cellulose to sodium periodate is (1-5):(1-3).

[0012] Furthermore, the heating temperature is 40-60℃.

[0013] Another objective of this invention is to provide a method for preparing the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating, wherein the method comprises the following steps: S1. Mix dialdehyde nanocellulose, carboxymethyl chitosan, sodium alginate, and water, and heat and stir to obtain a wall material precursor. S2. The penetrating crystallization masterbatch is blended with hydroxypropyl methylcellulose, sieved, and rolled into rounds to obtain the core material; the wall material precursor is sprayed onto the surface of the core material to form a coating film, and dried to obtain self-healing waterproof microcapsules. S3. The self-healing waterproof microcapsules are mixed with the remaining components to obtain a water-reactive, self-healing, backwater-resistant, pressure-resistant, and seepage-resistant waterproof coating.

[0014] Furthermore, in step S1, the heating temperature is 40-50℃.

[0015] Further, in step S2, the mass ratio of the wall material precursor to the core material is (5-20):1.

[0016] Further, in step S2, the mass ratio of the permeation crystallization masterbatch to hydroxypropyl methylcellulose is 100:(2-5).

[0017] Furthermore, in step S2, the particle size of the core material is 100-500 μm.

[0018] The present invention has the following beneficial effects: This invention provides a water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating. The coating comprises silicate cement, titanium dioxide, quartz sand, metakaolin, hydroxypropyl methylcellulose, a water-reducing agent, a powdered defoamer, vinyl acetate-ethylene copolymer, and self-healing waterproof microcapsules. The self-healing waterproof microcapsules comprise a wall material and a core material. The wall material comprises dialdehyde nanocellulose, carboxymethyl chitosan, and sodium alginate, while the core material's effective component is a penetrating crystallizing masterbatch.

[0019] This invention utilizes the Schiff base reaction between the aldehyde groups of dialdehyde nanocellulose and the amino groups of carboxymethyl chitosan to form dynamic imine bonds, as well as the interactions between the hydroxyl, amino, and carboxyl groups of dialdehyde nanocellulose, carboxymethyl chitosan, and sodium alginate, to construct a dense, stable, and self-healing wall material. The self-healing and waterproof microcapsules formed by encapsulating this wall material around a core material, when applied to coatings, exhibit excellent and long-lasting waterproofing effects.

[0020] On the one hand, the wall material forms a network structure through dynamic imine bond cross-linking. When microcracks appear in the coating, the microcapsules will rupture and release the core material, thereby repairing the microcracks in the concrete. After the core material is released, the wall material swells due to water absorption and regenerates Schiff base, which can repair the cracks in the wall material. This allows the unreleased core material to be re-encapsulated, protecting the remaining core material so that it can be repaired again when cracks reappear, making the waterproof effect of the present invention more durable.

[0021] On the other hand, sodium alginate provides carboxyl groups during the preparation of wall materials, which can interact with the hydroxyl and amino groups of dialdehyde nanocellulose and carboxymethyl chitosan, resulting in intermolecular cross-linking and entanglement, making the network structure of the wall material dense and stable. At the same time, it can also undergo ionic cross-linking with calcium ions in the core material and cement-based materials, enhancing the stability of microcapsules, compatibility with cement hydration products, and stability of coatings, preventing the core material from peeling off from the wall material, improving the dispersibility of microcapsules in cement, and enhancing the anti-seepage and anti-compression effect of coatings.

[0022] In addition, the dialdehyde nanocellulose in the wall material retains the rigid structure of the fiber, which can make the microcapsule wall material denser and can also play a role in supporting and protecting the network structure, thereby protecting the microcapsule wall material and preventing it from breaking prematurely when water is added and mixed; carboxymethyl chitosan can give the coating an antibacterial effect to a certain extent, making it suitable for dark and humid environments such as basements.

[0023] The core material selected in this invention is a permeable crystallizing masterbatch. When the microcapsule wall material ruptures, the permeable crystallizing masterbatch will be released upon contact with water and react with Ca in the concrete substrate. 2+ OH - Through the reaction of these substances, inorganic crystals such as dendritic ettringite and dense hydrated calcium silicate are generated. These components can continuously grow, fully filling pores and sealing cracks, forming an integrated waterproof barrier with the substrate, significantly improving the waterproof and seepage-resistant capabilities of the back side. Detailed Implementation

[0024] To more clearly illustrate the technical solution of the present invention, the following embodiments are provided. Unless otherwise stated, the raw materials, reactions, and post-processing methods appearing in the embodiments are all commercially available raw materials and technical methods well known to those skilled in the art.

[0025] The terms "preferred," "more preferably," and "more suitable" used in this invention refer to embodiments of the invention that provide certain beneficial effects under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the description of one or more preferred embodiments does not imply that other embodiments are unavailable, nor is it intended to exclude other embodiments from the scope of this invention.

[0026] It should be understood that, except in any operational instance or otherwise indicated, the amounts or all figures representing ingredients used, for example, in the specification and claims, should be understood to be modified by the term "about" in all cases. Therefore, unless otherwise stated, the numerical parameters set forth in the following specification and appended claims are approximate values ​​varying according to the desired performance to be obtained according to the invention.

[0027] In embodiments of the present invention, the following raw materials will be used: The permeation crystallization masterbatch, grade ZY-ST100, was purchased from Zengye Fine Chemicals.

[0028] Chitosan, MW=5000 Da, was purchased from Zhejiang Jinke Biochemical Co., Ltd.

[0029] Sodium alginate, M / G=1:2, molecular weight: 100 kDa, purchased from Maclean's.

[0030] Hydroxypropyl methylcellulose, brand name HEADCEL HPK200M, was purchased from Fujian Liantuo Lantou Materials Technology Co., Ltd.

[0031] Powdered defoamer, polyether-modified silicone powdered defoamer, brand name BS1860, purchased from Wacker Chemie, Germany.

[0032] Water-reducing agent, polycarboxylate water-reducing agent, brand name GH-JSJ, purchased from Gaocheng Hengda.

[0033] Metakaolin, grade TY-206, was purchased from Tuoyi New Materials Co., Ltd.

[0034] Silicate cement, 325 white cement, purchased from Yingqi Cement.

[0035] Vinyl acetate-ethylene copolymer, VAE adhesive powder, brand name DA-1100, was purchased from Shanghai Zengye Industrial Co., Ltd.

[0036] Cellulose nanofibers, brand name whkmk-1211263, were purchased from Wuhan Kemic Biomedical Technology Co., Ltd.

[0037] The preparation method of dialdehyde nanocellulose includes the following steps: Under light-protected conditions, 4 parts of cellulose nanofibers were dispersed in 100 parts of water, 1 part of sodium periodate was added, and the pH was adjusted to 5.5 with 10 wt% dilute sulfuric acid. The reaction was heated at 45°C for 3 h. After the reaction was completed, the product was washed with water until neutral and dried to obtain dialdehyde nanocellulose.

[0038] Carboxymethyl chitosan is prepared by the following steps: Add 5 parts chitosan and 1 part chloroacetic acid to 50 parts of 42 wt% NaOH aqueous solution, stir and react for 28 h, adjust the pH to 7.0 with 50 wt% hydrochloric acid aqueous solution, wash with anhydrous ethanol, and dry at 60 °C to obtain carboxymethyl chitosan.

[0039] Unless otherwise specified, the water used in the embodiments of this invention refers to deionized water.

[0040] In the embodiments of this invention, "parts" refers to parts by mass.

[0041] Example 1 A water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating, comprising the following components in parts by weight: 450 parts of silicate cement 50 parts of titanium dioxide 345 parts of quartz sand 50 parts of metakaolin 2 parts hydroxypropyl methylcellulose 1 part water-reducing agent 2 parts powder defoamer 50 parts of vinyl acetate-ethylene copolymer 50 portions of self-healing waterproof microcapsules; The preparation method of the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating includes the following steps: S1. First, disperse 1 part of dialdehyde nanocellulose in 20 parts of water, dissolve 2 parts of carboxymethyl chitosan in 50 parts of water, and dissolve 3 parts of sodium alginate in 100 parts of water. Then, mix them together, heat to 50°C, and stir evenly to obtain the wall material precursor. S2. Mix 10 parts of penetrating crystallization masterbatch with 0.5 parts of hydroxypropyl methylcellulose and 3 parts of 75 wt% ethanol aqueous solution, sieve through a 75-mesh sieve, then roll into micro pellets using a pelletizing machine, and dry to obtain core material; place 13 parts of the core material in a fluidized bed, spray-coat with 176 parts of wall material precursor to form a coating film, and dry to obtain self-healing waterproof microcapsules; S3. According to the above-mentioned mass proportions, first mix the self-healing waterproof microcapsules with the remaining components except the water-reducing agent, and finally add the water-reducing agent and stir evenly to obtain a water-reactive, self-healing, backwater-resistant, pressure-resistant, and seepage-resistant waterproof coating.

[0042] Example 2 A water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating, comprising the following components in parts by weight: 500 parts of silicate cement 50 parts of titanium dioxide 300 parts of quartz sand 45 parts of metakaolin 2 parts hydroxypropyl methylcellulose 1 part water-reducing agent 2 parts powder defoamer 40 parts of vinyl acetate-ethylene copolymer 60 portions of self-healing waterproof microcapsules; The preparation method of the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating includes the following steps: S1. First, disperse 1 part of dialdehyde nanocellulose in 20 parts of water, dissolve 3 parts of carboxymethyl chitosan in 50 parts of water, and dissolve 3 parts of sodium alginate in 100 parts of water. Then, mix them together, heat to 50°C, and stir evenly to obtain the wall material precursor. S2. Mix 12 parts of penetrating crystallization masterbatch with 0.5 parts of hydroxypropyl methylcellulose and 3 parts of 75 wt% ethanol aqueous solution, sieve through a 75-mesh sieve, and then roll into micro pellets using a spheroidizing machine. After drying, obtain the core material. Place 15 parts of the core material in a fluidized bed and spray-coat with 177 parts of wall material precursor to form a coating film. After drying, obtain self-healing waterproof microcapsules. S3. According to the above-mentioned mass proportions, first mix the self-healing waterproof microcapsules with the remaining components except the water-reducing agent, and finally add the water-reducing agent and stir evenly to obtain a water-reactive, self-healing, backwater-resistant, pressure-resistant, and seepage-resistant waterproof coating.

[0043] Example 3 A water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating, comprising the following components in parts by weight: 450 parts of silicate cement 50 parts of titanium dioxide 330 parts of quartz sand 60 parts of metakaolin 2 parts hydroxypropyl methylcellulose 1 part water-reducing agent 2 parts powder defoamer 50 parts of vinyl acetate-ethylene copolymer 55 portions of self-healing waterproof microcapsules; The preparation method of the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating includes the following steps: S1. First, disperse 2 parts of dialdehyde nanocellulose in 20 parts of water, dissolve 3 parts of carboxymethyl chitosan in 50 parts of water, and dissolve 5 parts of sodium alginate in 100 parts of water. Then, mix them together, heat to 50°C, and stir evenly to obtain the wall material precursor. S2. Mix 20 parts of penetrating crystallization masterbatch with 1 part of hydroxypropyl methylcellulose and 5 parts of 75 wt% ethanol aqueous solution, sieve through a 75-mesh sieve, then roll into micro pellets using a pelletizing machine, and dry to obtain core material; place 25 parts of the core material in a fluidized bed, spray-coat with 180 parts of wall material precursor to form a coating film, and dry to obtain self-healing waterproof microcapsules. S3. According to the above-mentioned mass proportions, first mix the self-healing waterproof microcapsules with the remaining components except the water-reducing agent, and finally add the water-reducing agent and stir evenly to obtain a water-reactive, self-healing, backwater-resistant, pressure-resistant, and seepage-resistant waterproof coating.

[0044] Comparative Example 1 A water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating, the difference between this comparative example and Example 1 is that step S1 is replaced with: S1. First, dissolve 1 part of dialdehyde nanocellulose in 20 parts of water and 2 parts of carboxymethyl chitosan in 50 parts of water, then mix them together, heat to 50°C, and stir evenly to obtain the wall material precursor. The other steps and dosages are the same as in Example 1.

[0045] Comparative Example 2 A self-healing, water-reactive, pressure-resistant, and seepage-resistant waterproof coating is disclosed. The difference between this comparative example and Example 1 is that in step S1, the same mass of dialdehyde nanocellulose is replaced with cellulose nanofibers. The other steps and dosages are the same as in Example 1.

[0046] Test case Add 9 wt% water to the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coatings prepared in Examples 1-3 and Comparative Examples 1-2, mix, and then perform performance tests. Concrete specimens were prepared according to the test materials and mix proportions specified in Part 7 of GB18445-2012 "Cement-based Penetrating Crystalline Waterproof Coatings" and the relevant provisions of GB50081-2016 "Standard for Test Methods of Mechanical Properties of Ordinary Concrete". The wet substrate bond strength and secondary seepage pressure of the coated concrete specimens were tested according to the test methods specified in Part 7 of GB18445-2012 "Cement-based Penetrating Crystalline Waterproof Coatings". The recrystallization seepage pressure of the specimens was tested according to the test methods specified in Part 6 of GB23440-2009 "Inorganic Waterproofing and Leak-stopping Materials". The test results are shown in Table 1.

[0047] Table 1 Performance Test Results As shown in Table 1, the water-reactive, self-healing, backwater-resistant, pressure-resistant, and seepage-resistant waterproof coatings prepared in Examples 1-3 of this invention possess excellent seepage-resistant and waterproof capabilities, and can bond more tightly with concrete materials, making them suitable for use in backwater environments such as basements. However, Comparative Example 1, lacking sodium alginate in the wall material, cannot react with silicate cement and the core material, resulting in poor adhesion strength on the wet substrate, a loose capsule wall structure, and easy breakage. Some microcapsules are prematurely released during water mixing, significantly reducing secondary seepage resistance and failing to achieve long-term effectiveness. Comparative Example 2, replacing dialdehyde nanocellulose with cellulose nanofibers, lacks aldehyde groups, preventing the formation of a sifting base in the wall material. This reduces the stability of the wall material compared to the examples, and the wall material loses its self-healing properties. The penetrating crystallizing masterbatch continues to be released after the wall material cracks, also significantly reducing the protection period. Because the wall materials in Comparative Examples 1-2 are relatively loose, when the microcapsules swell upon contact with water, the penetrating crystallizing masterbatch cannot be concentrated at the cracks, resulting in poor penetrating crystallization activity. This weakens the coating's recrystallization and seepage resistance.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating, characterized in that: The water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating comprises the following components in parts by weight: 400-500 parts of silicate cement 30-60 parts of titanium dioxide 300-400 parts of quartz sand 30-80 parts of metakaolin 1-5 parts of hydroxypropyl methylcellulose 1-3 parts water-reducing agent 1-3 parts powdered defoamer 30-100 parts of vinyl acetate-ethylene copolymer 30-100 portions of self-healing waterproof microcapsules; The self-healing waterproof microcapsule includes a wall material and a core material. The wall material includes dialdehyde nanocellulose, carboxymethyl chitosan, and sodium alginate, while the effective component of the core material is a penetrating crystallization masterbatch.

2. The water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating according to claim 1, characterized in that, The permeation crystallization masterbatch is selected from one or more of the following: zirconium silicate, silicate, aluminate, sulfoaluminate, and carbonate.

3. The water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating according to claim 1, characterized in that, The wall material comprises the following parts by weight of raw materials: 1-3 parts of dialdehyde nanocellulose 1-5 parts of carboxymethyl chitosan 2-5 parts sodium alginate.

4. The water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating according to claim 1, characterized in that, The preparation method of the dialdehyde nanocellulose includes the following steps: Under light-protected conditions, cellulose and sodium periodate were mixed, the pH was adjusted with sulfuric acid, the reaction was heated, and the mixture was purified to obtain dialdehyde nanocellulose.

5. The water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating according to claim 4, characterized in that, The mass ratio of cellulose to sodium periodate is (1-5):(1-3).

6. The water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating according to claim 4, characterized in that, The heating temperature is 40-60℃.

7. The method for preparing the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating according to any one of claims 1-6, characterized in that, The preparation method of the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating includes the following steps: S1. Mix dialdehyde nanocellulose, carboxymethyl chitosan, sodium alginate, and water, and heat and stir to obtain a wall material precursor. S2. The permeation crystallization masterbatch is blended with hydroxypropyl methylcellulose, sieved, and rolled into rounds to obtain the core material; the wall material precursor is sprayed onto the surface of the core material to form a coating film, and dried to obtain self-healing waterproof microcapsules. S3. The self-healing waterproof microcapsules are mixed with the remaining components to obtain a water-reactive, self-healing, backwater-resistant, pressure-resistant, and seepage-resistant waterproof coating.

8. The preparation method of the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating according to claim 7, characterized in that, In step S1, the heating temperature is 40-50℃.

9. The preparation method of the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating according to claim 7, characterized in that, In step S2, the mass ratio of the wall material precursor to the core material is (5-20):

1.

10. The preparation method of the water-reactive, self-healing, waterproof, pressure-resistant, and seepage-resistant coating according to claim 7, characterized in that, In step S2, the mass ratio of the permeation crystallization masterbatch to hydroxypropyl methylcellulose is 100:(2-5).

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