Damping solid buoyancy material and preparation method thereof

Abstract

The invention provides a damping solid buoyancy material and a preparation method thereof. The buoyancy material comprises the following components in parts by weight: 100 parts of matrix resin, 30-120 parts of a curing agent, 5-20 parts of a diluent, 1-5 parts of an anti-settling agent, 1-5 parts of a defoaming agent and 50-140 parts of composite hollow glass beads, the method comprises the following steps: step 1, preparing a preform; step 2, preparing a finished product; step 3, preparing buoyancy material slurry; 4, after the buoyancy material slurry is put into a mold, the mold is put into a drying oven to be heated, cured and formed, and the required damping solid buoyancy material is obtained after demolding; according to the damping solid buoyancy material and the preparation method thereof, the interfacial acting force among the components in the buoyancy material can be effectively enhanced, the preparation method of the buoyancy material is simplified, the preparation cost of the buoyancy material is reduced, the preparation efficiency of the buoyancy material is improved, and the damping performance of the buoyancy material is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical materials, and in particular to a damping solid buoyancy material with a hollow filler functionally coated thereon and a preparation method thereof. Background Art

[0002] As we all know, solid buoyancy materials are widely used in underwater equipment to provide buoyancy for equipment because of their low density, high pressure resistance, low water absorption, and corrosion resistance. However, due to the complex and changeable marine environment, underwater equipment operations are often impacted and squeezed by the external environment, causing damage to solid buoyancy materials, thereby affecting normal underwater work. Therefore, this requires solid buoyancy materials to have damping properties to resist the impact of the external environment. At present, there are many studies on solid buoyancy materials, but not many studies on damping solid buoyancy materials.

[0003] For example, patent publication number CN103707590A discloses a sandwich damping composite structure buoyancy material and its preparation process, using polyurethane elastomer as the bonding damping coating between core material and core material, core material and surface material, and surface material and surface material to prepare a buoyancy material with a multi-layer damping structure, with a density of 0.517g / cm3, a compressive strength of 30MPa, and a damping loss factor of 0.1. The buoyancy material can have damping properties, but because its preparation process adopts the form of premixing, kneading, molding, curing, and cutting into solid buoyancy material modules, the preparation process of the buoyancy material is relatively complicated. Patent publication number CN114806086A discloses a damping solid buoyancy material based on a dynamic cross-linked structure, and prepares a damping solid buoyancy material prepared by vacuum infusion molding process with damping type millimeter-level small balls and diazotized modified hollow glass microspheres as fillers. The damping type millimeter-level small balls are used to replace the traditional damping rubber balls, with a density of 0.42g / cm3, a compression strength of 23MPa, a water absorption rate of 0.5%, and a damping loss factor increased from 0.02 to more than 0.10. It can improve the damping characteristics of the buoyancy material, but its preparation process is still relatively complicated, and it is necessary to coordinate the glass microspheres with the damping type millimeter small balls, which is easy to cause the problem of high preparation cost of the buoyancy material and poor interface force between the glass microspheres and the small balls.

[0004] Since the research on solid buoyancy materials at home and abroad is more focused on the research of resin matrix formula system, the hollow glass microspheres as lightweight fillers are directly filled into the resin matrix and stirred, or filled into the resin matrix after being activated by a coupling agent. At present, the application research of functionalized coated hollow glass microspheres in the performance of solid buoyancy materials is still relatively rare. Functionalized coating can help improve the preparation efficiency of materials and improve the performance of materials. In the future development, the surface coating technology of glass microspheres will continue to receive attention and application. Therefore, there is a lot of room for exploration and research on the surface coating of microspheres in damping buoyancy materials. Therefore, it is of great significance to study how to improve the damping performance of solid buoyancy materials by functionally coating hollow glass microspheres while simplifying the preparation process. Summary of the invention

[0005] In view of this, the present invention aims to propose a damping solid buoyancy material and a preparation method thereof, so as to solve the problems in the prior art that the interface force between the components in the buoyancy material with damping performance is poor, and the material preparation method is relatively complex, costly, and has low preparation efficiency; thereby effectively enhancing the interface force between the components in the buoyancy material, simplifying the method for preparing the buoyancy material, reducing the cost of preparing the buoyancy material, improving the efficiency of preparing the buoyancy material, enhancing the damping performance of the buoyancy material, and reducing the water absorption rate of the material.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] The invention relates to a damping solid buoyancy material and a preparation method thereof. The damping solid buoyancy material comprises the following components in parts by weight: 100 parts of base resin, 30-120 parts of curing agent, 5-20 parts of diluent, 1-5 parts of anti-settling agent, 1-5 parts of defoaming agent and 50-140 parts of composite hollow glass microspheres.

[0008] Furthermore, the composite hollow glass microspheres include micrometer-sized hollow glass microspheres.

[0009] Furthermore, the base resin is bisphenol A epoxy resin.

[0010] Furthermore, the curing agent used is an epoxy curing agent used in conjunction with bisphenol A epoxy resin.

[0011] Furthermore, the epoxy curing agent includes any one of polyetheramine epoxy curing agent T403 and amine curing agent 3486.

[0012] Furthermore, the diluent is an epoxy reactive diluent, and the type of the epoxy reactive diluent is any one of propylene oxide butyl ether 660A, C12-14 fatty glycidyl ether AGE, and diglycidyl ether.

[0013] Furthermore, the type of the defoaming agent is any one of BYK011, BYK022, and ACP-0001.

[0014] A method for preparing a damping solid buoyancy material, the method is used to prepare the damping solid buoyancy material, the method comprising the following steps:

[0015] Step 1, preparation of preform: rinse the pretreated hollow glass microspheres HGM, and place the rinsed HGM and dopamine hydrochloride in Tris-HCl buffer, and stir to obtain a composite hollow glass microsphere preform HGM@PDA;

[0016] Step 2, preparation of finished product: placing the preform HGM@PDA and sodium 3-mercaptopropane sulfonate in Tris-HCl buffer for reaction to obtain the expected composite hollow glass microsphere finished product HGM@PDA-SO3H;

[0017] Step 3: Preparation of buoyancy material slurry: Weigh the base resin, curing agent, diluent, anti-settling agent, defoaming agent and composite hollow glass microsphere finished product HGM@PDA-SO3H according to the required proportions, stir evenly and degas to obtain the required buoyancy material slurry;

[0018] Step 4: After placing the buoyancy material slurry into the mold, place the mold in an oven for heating and curing, and then demold the desired damping solid buoyancy material.

[0019] Further, step one includes:

[0020] Step S11: Preparation of preform: Selecting a sodium hydroxide solution of a required concentration, etching the hollow glass microspheres HGM with the sodium hydroxide solution at a first preset temperature of 80° C., and obtaining pretreated hollow glass microspheres HGM after a first preset time of 4 hours;

[0021] Step S12: flushing the pretreated hollow glass microspheres HGM until the pH value of the flushed liquid is 7±α, where α is the pH value deviation coefficient;

[0022] Step S13: placing the washed hollow glass microspheres HGM and dopamine hydrochloride in a Tris-HCl buffer, stirring at a second preset temperature of 35° C. for a second preset time of 8 hours to obtain a composite hollow glass microsphere preform HGM@PDA.

[0023] Further, step three includes:

[0024] Step S31: Preparation of buoyancy material slurry: According to the proportion of the components of the buoyancy material, weigh the base resin, curing agent, diluent, anti-settling agent, defoaming agent, and the finished composite hollow glass microsphere HGM@PDA-SO3H respectively;

[0025] Step S32: adding all the weighed component materials into a stirrer for uniform stirring; or adding in batches, first adding the base resin, curing agent, diluent, anti-settling agent, and defoaming agent into a stirrer for uniform mixing to form a resin slurry; then adding the finished composite hollow glass microsphere HGM@PDA-SO3H into the stirrer to mix it with the resin slurry for uniform stirring;

[0026] Step S33: After degassing, a buoyancy material slurry is obtained.

[0027] Compared with the prior art, the damping solid buoyancy material and the preparation method thereof described in the present invention have the following beneficial effects:

[0028] By setting the material, the interfacial forces between the components in the buoyancy material can be effectively enhanced. By setting the buoyancy material preparation method, the buoyancy material preparation method can be simplified, the cost of buoyancy material preparation can be reduced, the efficiency of buoyancy material preparation can be improved, the damping performance of the buoyancy material can be improved, and the water absorption rate of the material can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations of the present invention.

[0030] In the figure:

[0031] Figure 1 Schematic diagram of the synthesis process of surface-coated microbeads in this application;

[0032] Figure 2 The figure is a schematic flow chart of the method for preparing buoyancy materials. DETAILED DESCRIPTION

[0033] The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the essence of their work to other persons skilled in the art. However, these inventive concepts can be embodied in many different forms and should not be considered limited to the embodiments described herein.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0036] The applicant's initial development direction for buoyancy materials was low density, high strength, and low water absorption, without considering damping performance. Due to the complexity of the marine environment and the need for human exploration of the ocean, the first generation of damping buoyancy materials was studied on the resin curing agent formula. In view of the shortcomings of existing solid buoyancy materials, in order to solve the problems of poor interface forces between the components in the buoyancy materials with damping performance in the prior art, as well as the complex material preparation method, high cost, and low preparation efficiency; the second generation of damping buoyancy materials, based on the first generation of resin formula, attempted to modify the hollow glass microspheres by functional coating to improve the damping performance and water pressure resistance of the material.

[0037] This embodiment proposes a damping solid buoyancy material and a preparation method thereof, that is, a method for preparing a damping solid buoyancy material using functionally coated hollow glass microspheres. By covering the surface of the hollow glass microspheres with a thin layer of polymer, the interface between the resin and the microspheres is improved, and the material is applied to the solid buoyancy material to enhance the damping performance of the material and reduce the water absorption rate.

[0038] The damping solid buoyancy material comprises the following components in parts by weight: 100 parts of matrix resin, 30-120 parts of curing agent, 5-20 parts of diluent, 1-5 parts of anti-settling agent, 1-5 parts of defoaming agent, and 50-140 parts of composite hollow glass microspheres. The composite hollow glass microspheres include micron-sized hollow glass microspheres. The micron-sized hollow glass microspheres obtained by screening are any one of K15, S15, and K20 of 3M Company of the United States. The density of the hollow glass microspheres is 0.15g / cm 3 -0.40g / cm 3 , the particle size of the hollow glass microspheres is 80μm-200μm. The matrix resin is bisphenol A epoxy resin. The type of bisphenol A epoxy resin can be any one of the brands E44, E51, E54, and LY1564. The curing agent is an epoxy curing agent used in conjunction with bisphenol A epoxy resin, and the type of epoxy curing agent includes any one of polyetheramine epoxy curing agent T403 and amine curing agent 3486. The diluent is an epoxy active diluent, and the type of epoxy active diluent is any one of propylene oxide butyl ether 660A, C12-14 fatty glycidyl ether AGE, and diglycidyl ether. The anti-settling agent is any one of fumed silica and organic bentonite. The type of defoaming agent is any one of BYK011, BYK022, and ACP-0001.

[0039] By setting the material, the interface interaction force between the components in the buoyancy material can be effectively enhanced, the interface bonding strength of the buoyancy material can be enhanced, and the preparation cost of the buoyancy material can be reduced.

[0040] A method for preparing a damping solid buoyancy material, the method is used to prepare the damping solid buoyancy material, the method comprising the following steps:

[0041] Step 1, preparation of preform: rinse the pretreated hollow glass microspheres HGM, and place the rinsed HGM and dopamine hydrochloride in Tris-HCl buffer (pH=8.5, 35° C.), and stir for 8 hours to obtain a composite hollow glass microsphere preform HGM@PDA;

[0042] Step 2, preparation of finished product: the preform HGM@PDA and sodium 3-mercaptopropane sulfonate were placed in Tris-HCl buffer (pH=8.5, 35°C) for reaction for 12 hours to obtain the expected composite hollow glass microsphere finished product HGM@PDA-SO3H;

[0043] Step 3: Preparation of buoyancy material slurry: Weigh the base resin, curing agent, diluent, anti-settling agent, defoaming agent and composite hollow glass microsphere finished product HGM@PDA-SO3H according to the required proportions, stir evenly and degas to obtain the required buoyancy material slurry;

[0044] Step 4: After placing the buoyancy material slurry into the mold, place the mold in an oven for heating and curing, and then demold the desired damping solid buoyancy material.

[0045] Wherein, in step 1, the Tris-HCl buffer is a tris(hydroxymethyl)aminomethane hydrochloride buffer. The composite hollow glass microsphere preform HGM@PDA is HGM coated with polydopamine. The structural formula of dopamine hydrochloride is In step 2, the structural formula of sodium 3-mercaptopropane sulfonate is The composite hollow glass microsphere finished product HGM@PDA-SO3H is the functionalized coated HGM. In step 4, the density of the prepared damping solid buoyancy material is 0.48-0.50 g / cm 3 The compressive strength of the damping solid buoyancy material is 31Mpa, the water absorption rate of the damping solid buoyancy material is less than 1%, and the minimum loss factor of 500Hz at room temperature is about 0.1.

[0046] By covering the surface of micron-sized hollow glass microspheres with a nano-scale polymer coating of negligible thickness, and then performing surface grafting, the surface is connected with reactive groups to improve the wettability of the hollow microspheres to the resin, and also to improve their compatibility and interfacial force with the matrix resin. The coating adds buffer protection to prevent the microspheres from breaking during the mechanical stirring of the resin and microspheres, which in turn leads to the problem of increased water absorption. In addition, the buffer coating between the resin and the microspheres can also effectively improve the damping performance of the material. In addition, through the setting of the method, the method of preparing buoyancy materials can also be simplified, the cost of preparing buoyancy materials can be reduced, the efficiency of preparing buoyancy materials can be improved, the damping performance of buoyancy materials can be improved, and the water absorption rate of the materials can be reduced.

[0047] Step one includes:

[0048] Step S11: Preparation of preform: Selecting a sodium hydroxide solution of a required concentration, etching the hollow glass microspheres HGM with the sodium hydroxide solution at a first preset temperature of 80° C., and obtaining pretreated hollow glass microspheres HGM after a first preset time of 4 hours;

[0049] Step S12: flushing the pretreated hollow glass microspheres HGM until the pH value of the flushed liquid is 7±α, where α is the pH value deviation coefficient;

[0050] Step S13: placing the washed hollow glass microspheres HGM and dopamine hydrochloride in a Tris-HCl buffer, stirring at a second preset temperature of 35° C. for a second preset time of 8 hours to obtain a composite hollow glass microsphere preform HGM@PDA.

[0051] The setting of the polydopamine layer in the composite hollow glass microsphere preform HGM@PDA can increase the buffer protection of the hollow glass microspheres, prevent the microspheres from breaking during the mechanical stirring of the resin and microspheres, and thus cause the problem of increased water absorption. The damping performance of the material can also be improved by filling the polydopamine layer between the two rigid structures of the microspheres and the resin matrix.

[0052] Step 2 includes:

[0053] Step S21: Preparation of finished product: selecting preform HGM@PDA and sodium 3-mercaptopropane sulfonate according to a preset ratio;

[0054] Step S22: at a third preset temperature of 35° C., the preform HGM@PDA and sodium 3-mercaptopropane sulfonate are placed in a Tris-HCl buffer solution and reacted for a third preset time of 12 hours to obtain the expected composite hollow glass microsphere finished product HGM@PDA-SO3H.

[0055] Wherein, in step S21, the preset ratio of the preform HGM@PDA to sodium 3-mercaptopropane sulfonate is 5:1.

[0056] By using glass microsphere surface functional coating technology in the composite hollow glass microsphere finished product HGM@PDA-SO3H, the performance and application range of the microspheres can be improved. In addition, since the hollow glass microspheres HGM are a micron-sized hollow structured glass sphere widely used in coatings, construction and other fields; surface modification can not only improve the interface bonding strength with polymer materials, but also improve the mechanical properties of the materials.

[0057] Step three includes:

[0058] Step S31: Preparation of buoyancy material slurry: According to the proportion of the components of the buoyancy material, weigh the base resin, curing agent, diluent, anti-settling agent, defoaming agent, and the finished composite hollow glass microsphere HGM@PDA-SO3H respectively;

[0059] Step S32: Add all the weighed components into the stirrer and stir them evenly. Alternatively, add them in batches, first add the base resin, curing agent, diluent, anti-settling agent, and defoaming agent into the stirrer and mix them evenly to form a resin slurry; then put the finished composite hollow glass microsphere HGM@PDA-SO3H into the stirrer to mix it evenly with the resin slurry;

[0060] Step S33: After degassing, a buoyancy material slurry is obtained.

[0061] Through different preparation methods of buoyancy material slurry, it is possible to improve the preparation flexibility of buoyancy material, and on the basis of simplifying the preparation method of buoyancy material, improve the efficiency and stability of buoyancy material preparation, improve the mixing uniformity between the components in the buoyancy material, enhance the damping performance of the buoyancy material, and reduce the water absorption rate of the buoyancy material.

[0062] The matrix resin, curing agent, diluent, anti-settling agent, defoaming agent, and composite hollow glass microsphere finished product HGM@PDA-SO3H were weighed in proportion to prepare a solid buoyancy material as Example 1. The matrix resin, curing agent, diluent, anti-settling agent, defoaming agent, and hollow glass microsphere HGM were weighed in proportion to prepare a solid buoyancy material as Comparative Example 1. The matrix resin, curing agent, diluent, anti-settling agent, defoaming agent, and composite hollow glass microsphere preform HGM@PDA were weighed in proportion to prepare a solid buoyancy material as Comparative Example 2. The specific preparation methods of Comparative Examples 1-2 and Example 1 are as follows:

[0063] Embodiment 1:

[0064] A method for preparing a damping solid buoyancy material comprises the following steps:

[0065] Step 1: Etch HGM with sodium hydroxide solution (0.5M) at 80°C for 4 hours to obtain pretreated HGM. Then, rinse HGM thoroughly with ultrapure water until it is nearly neutral. Place the rinsed HGM and dopamine hydrochloride (1.6mg / mL) in a solution of Tris-HCl buffer (pH=8.5, 10mM), stir at 35°C for 8 hours, and obtain HGM coated with polydopamine (HGM@PDA), which is separated and purified, washed and dried to obtain HGM@PDA.

[0066] Step 2: The prepared HGM@PDA and sodium 3-mercaptopropane sulfonate were reacted in a Tris-HCl buffer solution (pH = 8.5, 40 mM) at 55°C for 12 hours to obtain the expected product (HGM@PDA-SO3H).

[0067] Step 3: Weigh 100 parts of E51 epoxy resin, 80 parts of polyetheramine epoxy curing agent T403, 5 parts of propylene oxide butyl ether 660A, 1 part of BYK011, 3 parts of fumed silica, and 75 parts of composite hollow glass microspheres HGM@PDA-SO3H, put them into a blender, mix them evenly, and evacuate the air bubbles to obtain a casting solution.

[0068] Step 4: Pour the casting liquid into the mold, put it into an oven at 80°C for curing for 24 hours, and then demould to obtain the buoyancy material.

[0069] Comparative Example 1:

[0070] A method for preparing a damping solid buoyancy material comprises the following steps:

[0071] Step 1: Etch the HGM with a sodium hydroxide solution (0.5 M) at 80° C. for 4 hours to obtain the pre-treated HGM. Then, rinse the HGM thoroughly with ultrapure water until it is nearly neutral.

[0072] Step 2: Weigh 100 parts of E51 epoxy resin, 80 parts of polyetheramine epoxy curing agent T403, 5 parts of propylene oxide butyl ether 660A, 1 part of BYK011, 3 parts of fumed silica, and 75 parts of hollow glass microspheres HGM, put them into a blender, mix them evenly, and evacuate the air bubbles to obtain a casting solution.

[0073] Step 3: Pour the casting liquid of step 2 into the mold, put it into an oven at 80°C for curing for 24 hours, and then demould to obtain the buoyancy material.

[0074] Comparative Example 2:

[0075] A method for preparing a damping solid buoyancy material comprises the following steps:

[0076] Step 1: Etch HGM with sodium hydroxide solution (0.5M) at 80°C for 4 hours to obtain pretreated HGM. Then, rinse HGM thoroughly with ultrapure water until it is nearly neutral. Place the rinsed HGM and dopamine hydrochloride (1.6mg / mL) in a solution of Tris-HCl buffer (pH=8.5, 10mM), stir at 35°C for 8 hours, and obtain HGM coated with polydopamine (HGM@PDA), which is separated and purified, washed and dried to obtain HGM@PDA.

[0077] Step 2: Weigh 100 parts of E51 epoxy resin, 80 parts of polyetheramine epoxy curing agent T403, 5 parts of propylene oxide butyl ether 660A, 1 part of BYK011, 3 parts of fumed silica, and 75 parts of composite hollow glass microspheres HGM@PDA, put them into a blender, mix them evenly, and evacuate the air bubbles to obtain a casting solution.

[0078] Step 3: Pour the casting liquid of step 2 into the mold, put it into an oven at 80°C for curing for 24 hours, and then demould to obtain the buoyancy material.

[0079] Various performance tests were performed on the solid buoyancy materials obtained in the above-mentioned Example 1 and Comparative Examples 1-2. The test results are shown in Table 1 below:

[0080] Table 1

[0081] Example 1 Comparative Example 1 Comparative Example 2 <![CDATA[Density (g / cm 3 )]]> 0.488 0.475 0.482 Compression strength(MPa) 31.1 31.4 31.2 Water absorption (%) 0.52 0.86 0.54 Damping loss factor 0.10 0.02 0.08

[0082] It can be seen from Table 1 that the present invention uses dopamine small molecules to coat hollow glass microspheres to prepare surface-coated hollow glass microspheres, and then connects small molecules to the surface to obtain the expected composite hollow glass microspheres, so as to prepare the damping solid buoyancy material, so that the buoyancy material has excellent damping performance. It can also reduce the water absorption rate of the buoyancy material and increase the interfacial force between the components in the buoyancy material, thereby improving the mechanical properties of the material.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A damping solid buoyancy material, characterized in that: The invention comprises the following components in parts by weight: 100 parts of base resin, 30-120 parts of curing agent, 5-20 parts of diluent, 1-5 parts of anti-settling agent, 1-5 parts of defoaming agent and 50-140 parts of composite hollow glass microspheres.

2. A damping solid buoyancy material according to claim 1, characterized in that: The composite hollow glass microspheres include micron-sized hollow glass microspheres.

3. A damping solid buoyancy material according to claim 1, characterized in that: The base resin is bisphenol A epoxy resin.

4. A damping solid buoyancy material according to claim 1, characterized in that: The curing agent is an epoxy curing agent used in conjunction with bisphenol A epoxy resin.

5. A damping solid buoyancy material according to claim 4, characterized in that: The epoxy curing agent includes any one of polyetheramine epoxy curing agent T403 and amine curing agent 3486.

6. A damping solid buoyancy material according to claim 1, characterized in that: The diluent is an epoxy active diluent, and the type of the epoxy active diluent is any one of propylene oxide butyl ether 660A, C12-14 fatty glycidyl ether AGE, and diglycidyl ether.

7. A damping solid buoyancy material according to claim 1, characterized in that: The defoaming agent is any one of BYK011, BYK022 and ACP-0001.

8. A method for preparing a damping solid buoyancy material, characterized in that: The method is used to prepare a damping solid buoyancy material according to any one of claims 1 to 7, and the method comprises the following steps: Step 1, preparation of preform: rinse the pretreated hollow glass microspheres HGM, and place the rinsed HGM and dopamine hydrochloride in Tris-HCl buffer, and stir for 8 hours to obtain a composite hollow glass microsphere preform HGM@PDA; Step 2, preparation of finished product: placing the preform HGM@PDA and sodium 3-mercaptopropane sulfonate in Tris-HCl buffer for reaction for 12 hours to obtain the expected composite hollow glass microsphere finished product HGM@PDA-SO3H; Step 3: Preparation of buoyancy material slurry: Weigh the base resin, curing agent, diluent, anti-settling agent, defoaming agent and composite hollow glass microsphere finished product HGM@PDA-SO3H according to the required proportions, stir evenly and degas to obtain the required buoyancy material slurry; Step 4: After placing the buoyancy material slurry into the mold, place the mold in an oven for heating and curing, and then demold the desired damping solid buoyancy material.

9. The method for preparing a damping solid buoyancy material according to claim 1, characterized in that: The step one comprises: Step S11: Preparation of preform: Selecting a sodium hydroxide solution of a required concentration, etching the hollow glass microspheres HGM with the sodium hydroxide solution at a first preset temperature of 80° C., and obtaining pretreated hollow glass microspheres HGM after a first preset time of 4 hours; Step S12: flushing the pretreated hollow glass microspheres HGM until the pH value of the flushed liquid is 7±α, where α is the pH value deviation coefficient; Step S13: placing the washed hollow glass microspheres HGM and dopamine hydrochloride in a Tris-HCl buffer, stirring at a second preset temperature of 35° C. for a second preset time of 8 hours to obtain a composite hollow glass microsphere preform HGM@PDA.

10. The method for preparing a damping solid buoyancy material according to claim 9, characterized in that: The step three comprises: Step S31: Preparation of buoyancy material slurry: According to the proportion of the components of the buoyancy material, weigh the base resin, curing agent, diluent, anti-settling agent, defoaming agent, and the finished composite hollow glass microsphere HGM@PDA-SO3H respectively; Step S32: adding all the weighed component materials into a stirrer for uniform stirring; or adding in batches, first adding the base resin, curing agent, diluent, anti-settling agent, and defoaming agent into a stirrer for uniform mixing to form a resin slurry; then adding the finished composite hollow glass microsphere HGM@PDA-SO3H into the stirrer to mix it with the resin slurry for uniform stirring; Step S33: After degassing, a buoyancy material slurry is obtained.

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