Basalt fiber composite material with impregnating agent and method for preparing the same

Abstract

The application relates to the technical field of impregnating agents and discloses an impregnating agent for basalt fiber composite materials, which contains, by mass fraction, 0.90-8.80% of modified epoxy resin, 2.53-3.72% of a coupling agent, 0.90-1.60% of a lubricant, 0.05-0.25% of nano SiO2, 0.90-5.35% of silicate ore powder, 1.65-4.30% of a water-based polyurethane dispersant, 0.1-3.25% of a polymerization inhibitor and the rest of solvent; the preparation method of the modified epoxy resin comprises the following steps: taking a hydrophilic intermediate, uniformly mixing the hydrophilic intermediate with epoxy resin base and solvent, adding a catalyst, heating, stirring, evaporating the solvent and obtaining the modified epoxy resin. The impregnating agent for basalt fiber composite materials has strong permeability for basalt fibers, and the impregnating agent has strong stability during use and can keep for a longer time without precipitation, so that the impregnating effect on basalt fibers is good as a whole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of impregnating agent, in particular to an impregnating agent for basalt fiber composite material and a preparation method thereof. BACKGROUND

[0002] Basalt fiber is a new type of inorganic, environmentally friendly, green and high-performance fiber material, which is composed of silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, iron oxide and titanium dioxide. Basalt fiber has many excellent properties such as high strength, electrical insulation, corrosion resistance, and high temperature resistance. In addition, the production process of basalt fiber determines that it produces less waste during production, has less environmental pollution, and the product can be directly degraded in the environment after being discarded, which is harmless to the environment. Therefore, basalt fiber has been applied to many fields such as fiber reinforced composite materials, friction materials, shipbuilding materials, thermal insulation materials, automotive industry, high-temperature filter fabrics, and protective materials.

[0003] For example, the patent with publication number CN116328282A discloses a basalt fiber ski board. Basalt ore is processed by crushing, melting and spinning to form basalt fiber, and then basalt fiber mesh cloth is obtained by weaving. The basalt fiber mesh cloth is soaked in an impregnating agent, dried, and then modified basalt fiber mesh cloth is obtained. Then, other materials are stacked and hot-pressed to obtain a basalt fiber board. The function of the impregnating agent is to modify the surface activity of the basalt fiber, thereby improving the bonding strength between the basalt fiber and other materials and improving the bending strength and other mechanical properties of the board.

[0004] According to the existing processing and application mode of basalt fiber, basalt fiber is woven or combined with other materials to produce various products for application in different fields. The impregnating agent used in the above processing process is one of the decisive factors affecting the performance of basalt fiber processing products. The impregnating agent can lubricate and protect the basalt fiber, and also has the effect of activating the surface of the basalt fiber, which determines the bonding strength of the basalt fiber in the process of mutual combination or combination with other substances.

[0005] Therefore, for the impregnating agent used for basalt fiber, the modification of each component of the impregnating agent has been proposed to improve the comprehensive performance of basalt fiber composite material. For example, the patent with publication number CN116023046A discloses an organic-inorganic nano-hybrid basalt fiber impregnating agent and a preparation method. Inorganic nanoparticles are used to modify the impregnating agent, which effectively improves the agglomeration problem of nanoparticles and improves the stability of the impregnating agent. In addition, the nano-modified impregnating agent has nano properties, which can increase the surface roughness of the fiber and enhance the compatibility of the fiber with other composite material matrices.

[0006] However, since the basalt fiber has formed a relatively three-dimensional and porous space structure in the process of melt spinning and the like, the effects of the infiltrating agent on the outermost layer and the inner layer of the basalt fiber are quite different in the process of infiltration. In view of this problem, in the actual production at present, the processing effect of the infiltrating agent on the inner layer of the basalt fiber is promoted by prolonging the infiltration time, heating or stirring in the process of infiltration and the like, but it is found through actual application that the methods for enhancing the infiltration effect at present are all prone to cause the precipitation of part of the substances in the infiltrating agent and the risk of feathering oxidation on the surface of the basalt fiber.

[0007] Therefore, there is an urgent need for an infiltrating agent for basalt fiber composite material which can effectively solve the problems of the precipitation of the infiltrating agent and the feathering oxidation on the surface of the basalt fiber, or an infiltrating agent which can effectively improve the infiltration effect on the inner space of the basalt fiber. SUMMARY

[0008] The technical problem to be solved by the present application is:

[0009] At present, in the process of infiltration treatment of the basalt fiber, due to the three-dimensional network space structure of the basalt fiber itself, the infiltration effects on the outermost layer and the inner layer of the basalt fiber are quite different in the process of infiltration, thereby affecting the subsequent processing. Although this problem is solved by prolonging the infiltration time, heating or stirring in the process of infiltration and the like at present, a new problem of the precipitation of part of the substances in the infiltrating agent emerges, and the long-time infiltration, heating or stirring will cause the risk of feathering oxidation on the surface of the basalt fiber.

[0010] The technical scheme adopted by the present application is:

[0011] The present application provides an infiltrating agent for basalt fiber composite material, which comprises 0.90-8.80% modified epoxy resin, 2.53-3.72% coupling agent, 0.90-1.60% lubricant, 0.05-0.25% nano-SiO2, 0.90-5.35% silicate ore powder, 1.65-4.30% water-based polyurethane dispersant, 0.1-3.25% polymerization inhibitor, and the balance is solvent.

[0012] The preparation method of the modified epoxy resin comprises the following steps:

[0013] The hydrophilic intermediate is mixed with the epoxy resin base and the solvent, a catalyst is added, heating and stirring are carried out, and the solvent is removed by evaporation to obtain the modified epoxy resin.

[0014] Preferably, the coupling agent is a mixture of γ-aminopropyl triethoxysilane and a weak acid.

[0015] Preferably, the lubricant comprises ammonium acetate salt cationic surfactant, polyethylene glycol 400 monooleate, polyethylene glycol 400 monostearate in a mass ratio of 4-7:4-7:10-18.

[0016] Preferably, the polymerization inhibitor uses one or more of 4-methoxyphenol, hydroquinone, p-tert-butylcatechol, 1,4-naphthoquinone, diphenylamine, benzidine.

[0017] Preferably, the solvent comprises deionized water and paraffin.

[0018] Preferably, the preparation method of the hydrophilic intermediate comprises the following steps: taking the capped isocyanate and the solvent, mixing, stirring, heating; then adding the hydrophilic modification material, incubating, evaporating the solvent to obtain the hydrophilic intermediate.

[0019] Preferably, the hydrophilic modification material is selected from one or more of polyamine, trimethylolpropane, tetrahydrofuran or trehalose.

[0020] The preparation method of the impregnant for basalt fiber composite material as described above comprises the following steps:

[0021] S1 Prepare modified epoxy resin and take the required amount of raw materials for use;

[0022] S2 Mix nano-SiO2 and silicate ore powder, add water-based polyurethane dispersant, mix evenly to obtain premix A; take modified epoxy resin, coupling agent, lubricant, mix evenly to obtain premix B;

[0023] S3 Take premix A and premix B, add deionized water while stirring; after mixing evenly, add the polymerization inhibitor and mix evenly; finally add paraffin to obtain the impregnant for basalt fiber composite material.

[0024] The application method of the impregnant for basalt fiber composite material as described above comprises the following steps:

[0025] Place the basalt fiber to be impregnated in a sealable container, inject the impregnating liquid, heat, impregnate, degas, ventilate, and dry to obtain the impregnated basalt fiber.

[0026] Preferably, the heating temperature is 30-60℃, and the impregnation time is 10-120min.

[0027] The beneficial effects of the present application are reflected in:

[0028] The present application has found that the infiltrating agent appears precipitation phenomenon in long time soaking use process, which is due to: first, the coupling agent in the infiltrating agent can produce a large number of polymers in the hydrolysis process, and the polymers can be precipitated after long time standing; second, some raw materials such as film forming agent in the infiltrating agent can appear self-polymerization after contacting with air, thereby causing the generation of precipitates; third, the infiltrating agent can be sheared and damaged in long time or cyclic use, thereby causing the imbalance of the infiltrating agent and the precipitation.

[0029] In the infiltrating treatment of basalt fiber, due to the three-dimensional porous space structure of the basalt fiber itself, a network barrier can be formed, thereby causing poor penetration effect of the infiltrating agent to the interior of the basalt fiber material, i.e. the problem of affecting subsequent processing due to the great difference in the infiltrating effect between the inner and outer layers of the basalt fiber.

[0030] The present application provides an infiltrating agent with strong penetration performance for basalt fiber, and the infiltrating agent has strong stability and can maintain for a longer time without precipitation in use.

[0031] In the infiltrating agent of the present application, the silicate mineral contains a large amount of silicon hydroxyl, which can occur condensation reaction with a large amount of Si-OH groups on the surface of the basalt fiber when contacting with the basalt fiber, thereby forming siloxane structure, and combining the excellent hydrophilic performance of the modified epoxy resin, the infiltrating agent system has strong stability and hydrophilicity, and can stably adhere to the surface of the basalt fiber, and realize sufficient activation and modification in the infiltrating treatment process.

[0032] The water-based polyurethane dispersant can uniformly disperse the silicate ore powder and other raw materials in the infiltrating agent system, improve the homogeneity of the infiltrating agent in the production and use process, and reduce the polymer aggregation and precipitation phenomenon in the infiltrating agent; on the other hand, the urethane group in the dispersant has strong adhesion and interfacial bonding capacity for the basalt fiber, which can improve the penetration capacity of the infiltrating agent when contacting with the basalt fiber, and make the basalt fiber long-acting infiltrated in the infiltrating agent system.

[0033] The mixture of deionized water and paraffin is used as the solvent, and the paraffin floats on the surface of the liquid due to the hydrophobic effect, which can effectively avoid the material from contacting with air when the basalt fiber is soaked in the infiltrating agent, thereby avoiding the problem of feathering oxidation. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be clearly and completely described below. If the specific conditions are not specified in the embodiments, the conventional conditions or the conditions recommended by the manufacturer are used. If the reagents or instruments are not specified by the manufacturer, they are all conventional products that can be purchased in the market.

[0035] The application provides a sizing agent for basalt fiber composite materials and a preparation method thereof

[0036] The sizing agent comprises 0.90-8.80% of modified epoxy resin, 2.53-3.72% of coupling agent, 0.90-1.60% of lubricant, 0.05-0.25% of nano-SiO2, 0.90-5.35% of silicate ore powder, 1.65-4.30% of water-based polyurethane dispersant and 0.1-3.25% of polymerization inhibitor, and the rest is solvent.

[0037] The coupling agent is a mixture of gamma-aminopropyl triethoxysilane and weak acid, the weak acid can be organic weak acid such as acetic acid; the lubricant comprises ammonium acetate cationic surfactant, polyethylene glycol 400 monooleate and polyethylene glycol 400 monostearate in a mass ratio of 4-7:4-7:10-18; the polymerization inhibitor is one or more of 4-methoxyphenol, hydroquinone, p-tert-butylcatechol, 1,4-naphthoquinone, diphenylamine and benzidine; and the solvent comprises deionized water and paraffin.

[0038] The preparation of the sizing agent for basalt fiber composite materials by using the above raw materials comprises the following steps:

[0039] (1) preparing modified epoxy resin: taking a hydrophilic intermediate, mixing with epoxy resin base and solvent, adding a catalyst such as dodecylamine, heating to 20-30 DEG C, stirring at a speed of 280-360 rpm, removing the solvent by rotary evaporation under reduced pressure to obtain the modified epoxy resin; wherein the solvent is ethyl acetate.

[0040] The preparation method of the above hydrophilic intermediate comprises the following steps: first, taking a blocked isocyanate and toluene, mixing, heating to 80-95 DEG C under the condition of stirring at a speed of 450-680 rpm, then adding a hydrophilic modification material such as polyamine, trimethylolpropane, tetrahydrofuran or trehalose, keeping warm for 40-60 min, removing the toluene by rotary evaporation under reduced pressure to obtain the hydrophilic intermediate.

[0041] (2) taking each component raw material in a certain amount for standby use;

[0042] (3) mixing the nano-SiO2 and silicate ore powder, adding the water-based polyurethane dispersant, mixing to obtain a premix A; taking the modified epoxy resin, coupling agent and lubricant, mixing to obtain a premix B;

[0043] (4) taking the premix A and the premix B, adding deionized water while stirring and mixing; after mixing, adding the polymerization inhibitor and mixing; finally adding paraffin and mixing to obtain the sizing agent for basalt fiber composite materials.

[0044] In the preparation of the premix B, the dispersant GSK-504, GSK-588, GSK-585, GSK-540, GSK-565, GSK-485 produced by Dongguan Gauss Fine Chemical Co., Ltd. can also be added, which has strong compatibility with the polymeric system and promotes more uniform dispersion of the raw materials.

[0045] The operation method for infiltrating basalt fibers by using the above-mentioned infiltrant for basalt fiber composites comprises the following steps:

[0046] The basalt fibers to be infiltrated are placed in a sealable container, the infiltrating liquid is injected, heated to 30-60℃, infiltrated for 10-120min, degassed, ventilated, and dried to obtain the basalt fibers after infiltration treatment.

[0047] Example 1

[0048] The following raw materials are measured by mass fraction: 4.80% modified epoxy resin, 3.12% equal mass mixture of γ-aminopropyl triethoxysilane and acetic acid, 1.25% mixture of ammonium acetate salt cationic surfactant, polyethylene glycol 400 monooleate and polyethylene glycol 400 monostearate with a mass ratio of 1:1:3, 0.15% nano-SiO2, 3.15% silicate ore powder, 2.95% water-based polyurethane dispersant, 1.65% 4-methoxyphenol, 22.07% liquid paraffin, and the balance is deionized water.

[0049] The nano-SiO2 and silicate ore powder are crushed and sieved, added to the water-based polyurethane dispersant, and mixed uniformly to obtain premix A; another modified epoxy resin, equal mass mixture of γ-aminopropyl triethoxysilane and acetic acid, mixture of ammonium acetate salt cationic surfactant, polyethylene glycol 400 monooleate and polyethylene glycol 400 monostearate with a mass ratio of 1:1:3, and GSK-504 dispersant are mixed uniformly to obtain premix B; premix A and premix B are taken, deionized water is added, and mixed while stirring; after mixing uniformly, 4-methoxyphenol is added and mixed uniformly; finally, liquid paraffin is added and mixed uniformly to obtain the infiltrant for basalt fiber composites.

[0050] Example 2

[0051] The following raw materials are measured by mass fraction: 5.78% modified epoxy resin, 3.20% equal mass mixture of γ-aminopropyl triethoxysilane and acetic acid, 1.35% mixture of ammonium acetate salt cationic surfactant, polyethylene glycol 400 monooleate and polyethylene glycol 400 monostearate with a mass ratio of 1:1:3, 0.18% nano-SiO2, 4.05% silicate ore powder, 3.12% water-based polyurethane dispersant, 2.14% 4-methoxyphenol, 22.07% liquid paraffin, and the balance is deionized water.

[0052] The nano-SiO2 and silicate ore powder are finely crushed, sieved, added to the water-based polyurethane dispersant, mixed uniformly to obtain premix A; another modified epoxy resin, a mixture of γ-aminopropyl triethoxysilane and acetic acid with a mass ratio of 1.25:1, a mixture of ammonium acetate salt cationic surfactant, polyethylene glycol 400 monooleate and polyethylene glycol 400 monostearate with a mass ratio of 1:1:3.75, and GSK-504 dispersant are mixed uniformly to obtain premix B; take premix A and premix B, add deionized water while stirring; after mixing, add 4-methoxyphenol and mix uniformly; finally add liquid paraffin and mix uniformly to obtain the infiltrant for basalt fiber composites.

[0053] Example 3

[0054] The following raw materials are measured by mass fraction: 5.78% modified epoxy resin, 3.20% equal mass mixture of γ-aminopropyl triethoxysilane and acetic acid, 1.35% mixture of ammonium acetate salt cationic surfactant, polyethylene glycol 400 monooleate and polyethylene glycol 400 monostearate with a mass ratio of 1:1:3, 0.18% nano-SiO2, 4.05% silicate ore powder, 3.12% water-based polyurethane dispersant, 2.14% 4-methoxyphenol, 22.07% liquid paraffin, and the balance is deionized water.

[0055] The nano-SiO2 and silicate ore powder are finely crushed, sieved, added to the water-based polyurethane dispersant, mixed uniformly to obtain premix A; another modified epoxy resin, a mixture of γ-aminopropyl triethoxysilane and acetic acid with a mass ratio of 1.25:1, a mixture of ammonium acetate salt cationic surfactant, polyethylene glycol 400 monooleate and polyethylene glycol 400 monostearate with a mass ratio of 1:1:3.75, and GSK-504 dispersant are mixed uniformly to obtain premix B; take premix A and premix B, add deionized water while stirring; after mixing, add 4-methoxyphenol and mix uniformly; finally add liquid paraffin and mix uniformly to obtain the infiltrant for basalt fiber composites.

[0056] Example 4

[0057] The following raw materials are measured by mass fraction: 2.67% modified epoxy resin, 2.83% mixture of γ-aminopropyl triethoxysilane and acetic acid with a mass ratio of 1.25:1, 1.05% mixture of ammonium acetate salt cationic surfactant, polyethylene glycol 400 monooleate and polyethylene glycol 400 monostearate with a mass ratio of 1:1:3.75, 0.10% nano-SiO2, 1.24% silicate ore powder, 2.05% water-based polyurethane dispersant, 0.84% 4-methoxyphenol, 22.07% liquid paraffin, and the balance is deionized water.

[0058] The nano-SiO2 and silicate ore powder are finely ground, sieved, added to the water-based polyurethane dispersant, mixed uniformly to obtain premix A; another modified epoxy resin, mixture of γ-aminopropyl triethoxysilane and acetic acid with a mass ratio of 1.25:1, mixture of ammonium acetate salt cationic surfactant, polyethylene glycol 400 monooleate and polyethylene glycol 400 monostearate with a mass ratio of 1:1:3.75, and GSK-504 dispersant are mixed uniformly to obtain premix B; take premix A and premix B, add deionized water while stirring; after mixing, add 4-methoxyphenol and mix uniformly; finally add liquid paraffin and mix uniformly to obtain the infiltrant for basalt fiber composite materials.

[0059] Comparative Example 1

[0060] The following raw materials are measured by mass fraction: 3.0% γ-aminopropyl triethoxysilane, 0.8% polyethylene glycol 400 monostearate, 0.3% ammonium acetate salt cationic surfactant, 11.53% E42 epoxy resin, and the balance is deionized water. The above raw materials are mixed under the condition of about 40°C, stirred uniformly to obtain the infiltrant.

[0061] Comparative Example 2

[0062] The following raw materials are measured by mass fraction: 3.6% γ-aminopropyl triethoxysilane, 1.1% polyethylene glycol 400 monostearate, 0.5% ammonium acetate salt cationic surfactant, 6.5% E44 epoxy resin, 2.5% 440 water-soluble epoxy resin, and the balance is deionized water. The above raw materials are mixed under the condition of about 40°C, stirred uniformly to obtain the infiltrant.

[0063] <Experimental Example>

[0064] Samples: Examples 1-4, Comparative Examples 1-2

[0065] (1) Stability test

[0066] The stability of the impregnating agent can be reflected by the solid content difference, wherein the solid content difference is specifically the solid content difference before and after the impregnating agent is subjected to high-speed shaking and centrifugation, and the smaller the solid content difference is, the stronger the stability of the impregnating agent is, which is a common way to evaluate the emulsion stability of the impregnating agent.

[0067] The solid content of the original impregnating agent is measured as follows: the impregnating agent is placed in a glass surface dish, the mass of the glass surface dish m0 is measured before treatment, the mass of the glass surface dish containing the impregnating agent m1 is measured, and then the glass surface dish containing the impregnating agent is subjected to drying treatment, and the mass of the glass surface dish containing the impregnating agent m2 is measured again after drying.

[0068] The solid content ω1 of the original impregnating agent is calculated by the following formula:

[0069]

[0070] The solid content of the supernatant after high-speed shaking and centrifugation is measured as follows: the impregnating agent is centrifuged at a speed of 2400 r / min for 30 minutes to obtain the supernatant of the impregnating agent. The solid content ω2 of the supernatant of the impregnating agent is measured in the same way as described above.

[0071] The solid content difference x of the impregnating agent before and after high-speed shaking and centrifugation is ω1-ω2, and the stability (solid content difference) of the sample is measured, and the results are summarized in Table 1 as follows:

[0072] Table 1 Test results of sample stability

[0073] solid content of the original infiltrant ω1 Solid content of the impregnating agent supernatant ω2 Stability ω1-ω2 Example 1 3.13％ 2.88％ 0.25％ Example 2 2.84％ 2.37％ 0.47％ Example 3 2.77％ 2.60％ 0.17％ Example 4 2.24％ 2.22％ 0.02％ Comparative Example 1 2.36％ 1.49％ 0.87％ Comparative Example 2 2.27％ 1.16％ 1.11％

[0074] As can be seen from Table 1 above, the solid content difference of the impregnating agent samples of Examples 1-4 before and after high-speed shaking and centrifugation is obviously smaller than that of the impregnating agent samples of Comparative Examples 1-2, i.e. the stability of the impregnating agent samples of Examples 1-4 is obviously stronger, which can maintain long-term activation and modification effect in the actual basalt fiber impregnation process, and avoid oxidation of basalt fiber composite materials and the like, so as to perform sufficient impregnation and modification treatment.

[0075] (2) Performance test

[0076] The impregnating agent samples are taken to measure their related material properties, and the measurement results are summarized in Table 2 as follows:

[0077] Table 2 Test results of sample performance

[0078]

[0079]

[0080] As can be seen from Table 2, the average viscosity and average surface tension of the infiltrating agents prepared in Examples 1-4 are all less than those of the infiltrating agents prepared in Comparative Examples 1-2, that is, in the basalt fiber infiltration treatment, the infiltrating agent provided by the present application can more fully and efficiently penetrate into the material, and in a relatively short time and under relatively mild environmental conditions, a more effective infiltration modification treatment effect can be achieved. Further, the samples are cut open and placed in the same horizontal position for comparison, and it is found that the infiltration thickness of the basalt fiber composite material in Examples 1-4 is significantly greater than that in Comparative Examples 1-2, that is, the infiltrating agent in the present application can more quickly and effectively enter the material when applied to the basalt fiber composite material, and can avoid the problem of uneven infiltration of the material inside and outside.

[0081] The above description is merely preferred embodiments of the present application, but not for limiting the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sizing agent for basalt fiber composite materials, characterized by, 0.90-8.80% by mass of modified epoxy resin, 2.53-3.72% by mass of coupling agent, 0.90-1.60% by mass of lubricant, 0.05-0.25% by mass of nano-SiO2, 0.90-5.35% by mass of silicate ore powder, 1.65-4.30% by mass of water-based polyurethane dispersant, 0.1-3.25% by mass of polymerization inhibitor, and the balance of solvent, wherein the solvent comprises deionized water and paraffin wax; The preparation method of the modified epoxy resin comprises the following steps: The hydrophilic intermediate is mixed with an epoxy resin base and a solvent, a catalyst is added, heated, stirred, and the solvent is evaporated to obtain the modified epoxy resin.

2. The basalt fiber composite material sizing agent according to claim 1, characterized by, The coupling agent is a mixture of γ-aminopropyl triethoxysilane and a weak acid.

3. The basalt fiber composite material sizing agent according to claim 1, characterized by, The lubricant comprises ammonium acetate salt cationic surfactant, polyethylene glycol 400 monooleate, and polyethylene glycol 400 monostearate in a mass ratio of 4-7:4-7:10-18.

4. The basalt fiber composite material sizing agent according to claim 1, characterized by, The polymerization inhibitor uses one or more of 4-methoxyphenol, hydroquinone, p-tert-butylcatechol, 1,4-naphthoquinone, diphenylamine, and benzidine.

5. The basalt fiber composite material according to claim 1, wherein The preparation method of the hydrophilic intermediate comprises the following steps: The capped isocyanate and the solvent are mixed, stirred, and heated, and then the hydrophilic modification material is added, the reaction is kept warm, and the solvent is evaporated to obtain the hydrophilic intermediate.

6. The basalt fiber composite material according to claim 5, wherein The hydrophilic modification material is selected from one or more of polyamine, trimethylolpropane, tetrahydrofuran, or trehalose.

7. The production method of the basalt fiber composite material's impregnant according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: S1, preparing the modified epoxy resin and taking the raw materials in the required amounts for standby use; S2, mixing the nano-SiO2 and the silicate ore powder, adding the water-based polyurethane dispersant, mixing uniformly to obtain a premix A; and taking the modified epoxy resin, the coupling agent, and the lubricant, mixing uniformly to obtain a premix B; S3, taking the premix A and the premix B, adding deionized water while stirring and mixing; after mixing uniformly, adding the polymerization inhibitor and mixing uniformly; and finally adding the paraffin wax to obtain the impregnating agent for the basalt fiber composite material.

8. The application method of the basalt fiber composite material impregnating agent according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: The basalt fiber to be impregnated is placed in a sealable container, the impregnating agent and water are injected, heated, impregnated, and then dried to obtain the impregnated basalt fiber.

9. The application method of the impregnant for basalt fiber composite materials according to claim 8, characterized in that, The heating temperature is 30-60°C, and the impregnation time is 10-120 min.

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