Damping solid buoyancy material and method of making same

Abstract

The application 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 a base 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 an antifoaming agent, and 50-140 parts of composite hollow glass microbeads; the method comprises the following steps: step one, preparation of a preform; step two, preparation of a finished product; step three, preparation of a buoyancy material slurry; and step four, after the buoyancy material slurry is placed into a mold, the mold is placed into an oven for heating and curing to form a damping solid buoyancy material, and the damping solid buoyancy material is demolded; through the damping solid buoyancy material and the preparation method thereof, the interface force between the components in the buoyancy material can be effectively enhanced, the preparation method of the buoyancy material is simplified, the cost of the preparation of the buoyancy material is reduced, the efficiency of the preparation of the buoyancy material is improved, and the damping performance of the buoyancy material is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical materials, in particular, relates to a kind of hollow filler functionalized coated damping solid buoyancy material and preparation method. BACKGROUND

[0002] It is known that solid buoyancy material is widely used in underwater equipment because of its low density, high pressure resistance, low water absorption and corrosion resistance, etc., to provide buoyancy for the equipment. However, due to the complexity of the marine environment, underwater equipment operations are often subjected to external environmental impact and extrusion, causing damage to the solid buoyancy material and affecting normal underwater work. Therefore, the solid buoyancy material is required to have damping properties to resist external environmental impact. There are many studies on solid buoyancy material, but few on damping solid buoyancy material.

[0003] For example, patent publication CN103707590A discloses a sandwich damping composite structure buoyancy material and its preparation process, which uses polyurethane elastomer as the core material and adhesive damping coating between core material, core material and surface material, surface material and surface material to prepare a multi-layer damping structure buoyancy material with a density of 0.517 g / cm3, a compressive strength of 30 MPa and a damping loss factor of 0.1. The buoyancy material has damping properties, but the preparation process is complex, as it involves premixing, kneading, molding, curing, and then cutting into solid buoyancy material modules. Patent publication CN114806086A discloses a damping solid buoyancy material based on dynamic cross-linking structure, which is prepared by vacuum infusion molding process using damping millimeter-sized balls and modified hollow glass microspheres as fillers. The damping millimeter-sized balls replace traditional damping rubber balls, with a density of 0.42 g / cm3, a compressive strength of 23 MPa, a water absorption of 0.5%, and a damping loss factor of 0.10 or more. The damping properties of the buoyancy material are improved, but the preparation process is still complex, and the glass microspheres and damping millimeter-sized balls need to be matched, which may cause high preparation cost and poor interface force between the glass microspheres and the balls.

[0004] Because more solid buoyancy materials at home and abroad are more targeted at resin matrix formula system research, and as lightweight fillers, hollow glass microspheres are directly filled into the resin matrix for stirring and mixing, or filled into the resin matrix after activation by a coupling agent. At present, functional coated hollow glass microspheres are relatively rare in the application research of solid buoyancy material performance, and functional coating can help improve the preparation efficiency of the material and improve the performance of the material. In the future development, the glass microsphere surface coating technology will continue to be concerned and applied, so there is a lot of exploration and research space for the microsphere surface coating in the damping buoyancy material. Therefore, it is of great significance to study how to functionalize the hollow glass microspheres and improve the damping performance of the solid buoyancy material under the premise of simplifying the preparation process. SUMMARY

[0005] Therefore, the present application aims to provide a damping solid buoyancy material and a preparation method thereof to solve the problems of poor interfacial force between components in the damping performance buoyancy material, complex material preparation method, high cost, low preparation efficiency and other problems in the prior art. Thus, the interfacial force between components in the buoyancy material can be effectively enhanced, the preparation method of the buoyancy material can be simplified, the cost of the buoyancy material preparation can be reduced, the efficiency of the buoyancy material preparation can be improved, the damping performance of the buoyancy material can be improved, and the water absorption of the material can be reduced.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0007] The damping solid buoyancy material and the preparation method thereof, the damping solid buoyancy material comprises the following components by weight: 100 parts of a 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 microspheres.

[0008] Further, the composite hollow glass microspheres comprise micron-sized hollow glass microspheres.

[0009] Further, the matrix resin is a bisphenol A type epoxy resin.

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

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

[0012] Further, the diluent is an epoxy active diluent, and the epoxy active diluent includes any one of epoxy propane butyl ether 660A, C12-14 fatty glycidyl ether AGE, and diglycidyl ether.

[0013] Further, the category of the defoaming agent is any one of BYK011, BYK022, ACP-0001.

[0014] A preparation method of a damping solid buoyancy material, the method is used for preparing the damping solid buoyancy material, the method comprises the following steps:

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

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

[0017] Step three, preparation of the buoyancy material slurry: weigh the matrix resin, curing agent, diluent, anti-settling agent, defoaming agent, and composite hollow glass microsphere finished product HGM@PDA-SO3H according to the required proportion, stir uniformly and deaerate, and obtain the required buoyancy material slurry;

[0018] Step four, after placing the buoyancy material slurry in the mold, place the mold in the oven for heating and curing to form, demold, and obtain the required damping solid buoyancy material.

[0019] Further, step one comprises:

[0020] Step S11: preparation of the preform: select a sodium hydroxide solution with a required concentration, use the sodium hydroxide solution to etch the hollow glass microsphere HGM at a first preset temperature of 80℃, and after a first preset time of 4 hours, obtain the pretreated hollow glass microsphere HGM;

[0021] Step S12: rinse the pretreated hollow glass microsphere HGM until the PH value of the rinsed liquid is 7±α, where α is the PH value deviation coefficient;

[0022] Step S13: place the rinsed hollow glass microsphere HGM and dopamine hydrochloride in Tris-Hcl buffer solution, stir at a second preset temperature of 35℃ for a second preset time of 8 hours, and obtain the composite hollow glass microsphere preform HGM@PDA.

[0023] Further, step three comprises:

[0024] Step S31: preparation of the buoyancy material slurry: according to the component ratio of the buoyancy material, the base resin, curing agent, diluent, anti-settling agent, defoaming agent, and composite hollow glass microsphere product HGM@PDA-SO3H are weighed respectively;

[0025] Step S32: all the weighed component materials are added to a stirrer for uniform stirring; or a batch addition method is adopted, the base resin, curing agent, diluent, anti-settling agent, and defoaming agent are first added to the stirrer and mixed uniformly to form a resin slurry; and then the composite hollow glass microsphere product HGM@PDA-SO3H is put into the stirrer to mix and stir uniformly with the resin slurry;

[0026] Step S33: after the defoaming treatment, the buoyancy material slurry is obtained.

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

[0028] Through the arrangement of the material, the interfacial force between the components in the buoyancy material can be effectively enhanced; through the arrangement of the buoyancy material preparation method, the method for preparing the buoyancy material can be simplified, the cost for preparing the buoyancy material can be reduced, the efficiency for preparing the buoyancy material 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 DRAWINGS

[0029] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The illustrations are given for the purpose of explaining the present application and are not intended to limit the present application in an inappropriate manner.

[0030] In the drawings:

[0031] Figure 1 It is a schematic diagram of the synthesis process of the surface-coated microsphere in the present application;

[0032] Figure 2 It is a schematic diagram of the flow chart of the buoyancy material preparation method. DETAILED DESCRIPTION

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

[0034] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

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

[0036] The applicant initially develops the low-density high-strength low-water absorption rate of the buoyancy material, and does not consider the 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 is studied in the resin curing agent formula. In view of the shortcomings of the existing solid buoyancy material, in order to solve the problem that the interface force between the components in the damping performance buoyancy material in the prior art is poor, and the material preparation method is relatively complex, the cost is relatively high, and the preparation efficiency is low; the second generation of damping buoyancy material is modified on the basis of the resin formula of the first generation, and the hollow glass microsphere is functionally coated to improve the damping performance and water pressure resistance of the material.

[0037] The embodiment proposes a damping solid buoyancy material and a preparation method thereof, that is, a method for preparing a damping solid buoyancy material by functionally coating a hollow glass microsphere. By covering a thin layer of polymer on the surface of the hollow glass microsphere, the interface between the resin and the microsphere is improved, which is applied to the solid buoyancy material to improve the damping performance of the material and reduce the water absorption rate.

[0038] The damping solid buoyancy material comprises the following components by weight: 100 parts of a base 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 a composite hollow glass microsphere. The composite hollow glass microsphere comprises a micron-sized hollow glass microsphere. The micron-sized hollow glass microsphere obtained by screening is any one of K15, S15, and K20 of the American 3M Company. The density of the hollow glass microsphere is 0.15 g / cm 3 -0.40 g / cm 3 The particle size of the hollow glass microsphere is 80-200 μm. The base resin is a bisphenol A type epoxy resin. The type of the bisphenol A type epoxy resin can be any one of E44, E51, E54, and LY1564. The curing agent is an epoxy curing agent used with the bisphenol A type epoxy resin. The type of the epoxy curing agent includes any one of a polyether amine epoxy curing agent T403 and an amine curing agent 3486. The diluent is an epoxy active diluent. The type of the epoxy active diluent includes any one of an epoxy propane butyl ether 660A, a C12-14 fatty glycidyl ether AGE, and a diglycidyl ether. The anti-settling agent is any one of fumed silica and organic bentonite. The type of the defoaming agent is any one of BYK011, BYK022, and ACP-0001.

[0039] By arranging the material, the interface force between the components in the buoyancy material can be effectively enhanced, and the interface bonding strength of the buoyancy material can be enhanced. It is also beneficial to reduce the cost of preparing the buoyancy material.

[0040] A preparation method of a damping solid buoyancy material, the preparation method being used for preparing the damping solid buoyancy material, and the method comprising the following steps:

[0041] Step one, preparation of a preform: the pre-processed hollow glass microspheres HGM are rinsed, and the rinsed HGM and dopamine hydrochloride are placed in a Tris-Hcl buffer (pH=8.5, 35 DEG C) for stirring for 8 hours to obtain a composite hollow glass microsphere preform HGM@PDA;

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

[0043] Step three, preparation of a buoyancy material slurry: the matrix resin, curing agent, diluent, anti-settling agent, defoaming agent, and composite hollow glass microsphere finished product HGM@PDA-SO3H are weighed according to the required proportions, uniformly stirred and defoamed to obtain the required buoyancy material slurry;

[0044] Step four, after the buoyancy material slurry is placed in a mold, the mold is placed in an oven for heating and curing to form a damping solid buoyancy material.

[0045] In step one, the Tris-Hcl buffer is a Tris-Hcl buffer, the composite hollow glass microsphere preform HGM@PDA is HGM coated with polydopamine, and the structural formula of dopamine hydrochloride is In step two, the structural formula of 3-mercaptopropane sodium sulfonate is The composite hollow glass microsphere finished product HGM@PDA-SO3H is HGM coated with a functional layer, and in step four, the density of the prepared damping solid buoyancy material is 0.48-0.50 g / cm 3 The compression strength of the damping solid buoyancy material is 31 MPa, the water absorption of the damping solid buoyancy material is <1%, and the minimum loss factor at 500 Hz at room temperature is about 0.1.

[0046] By covering the micron-sized hollow glass microspheres with a nanometer-sized polymer coating with a thickness that can be ignored, then surface grafting, the surface is grafted with a reactive group, so as to improve the wettability of the hollow microspheres to the resin, and also improve the compatibility and interfacial force of the hollow microspheres with the matrix resin, the coating increases the buffer protection, which is used to prevent the microspheres from being broken during the mechanical stirring of the resin and the microspheres, thereby causing 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, by the arrangement of the method, the method for preparing the buoyancy material can be simplified, the cost of preparing the buoyancy material can be reduced, the efficiency of preparing the buoyancy material can be improved, the damping performance of the buoyancy material can be improved, and the water absorption of the material can be reduced.

[0047] Step one includes:

[0048] Step S11: Preparation of the preform: select a sodium hydroxide solution with a desired concentration, use the sodium hydroxide solution to etch the hollow glass microspheres HGM at a first preset temperature of 80°C, and after a first preset time of 4 hours, obtain the pretreated hollow glass microspheres HGM;

[0049] Step S12: Rinse the pretreated hollow glass microspheres HGM until the PH value of the liquid after rinsing is 7±α, where α is the PH value deviation coefficient;

[0050] Step S13: Place the rinsed hollow glass microspheres HGM and dopamine hydrochloride in a Tris-Hcl buffer solution, stir at a second preset temperature of 35°C for a second preset time of 8 hours, and obtain the composite hollow glass microsphere preform HGM@PDA.

[0051] By arranging the polydopamine layer in the composite hollow glass microsphere preform HGM@PDA, the buffer protection of the hollow glass microspheres can be increased, and the problem of microsphere breakage during mechanical stirring of the resin and the microspheres, thereby causing the problem of increased water absorption, can be prevented. The polydopamine layer can also be filled between the two rigid structures of the microspheres and the resin matrix to improve the damping performance of the material.

[0052] Step two includes:

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

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

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

[0056] The use of the glass microsphere surface functionalization coating technology for the composite hollow glass microsphere finished product HGM@PDA-SO3H can improve the performance and application range of the microspheres. In addition, the hollow glass microsphere HGM is a micron-sized hollow structure glass sphere widely used in the fields of coatings and construction. Surface modification can improve the interfacial bonding strength with the polymer material and improve the mechanical properties of the material.

[0057] Step three includes:

[0058] Step S31: Preparation of the buoyancy material slurry: according to the component ratio of the buoyancy material, the base resin, curing agent, diluent, anti-settling agent, defoaming agent, and composite hollow glass microsphere finished product HGM@PDA-SO3H are weighed;

[0059] Step S32: All the weighed component materials are added to a stirrer for uniform stirring. Alternatively, the base resin, curing agent, diluent, anti-settling agent, and defoaming agent are first added to the stirrer and mixed uniformly to form a resin slurry; then the composite hollow glass microsphere finished product HGM@PDA-SO3H is added to the stirrer for uniform mixing with the resin slurry;

[0060] Step S33: After debubbling treatment, the buoyancy material slurry is obtained.

[0061] Through different preparation methods of the buoyancy material slurry, the preparation flexibility of the buoyancy material can be improved, the efficiency and stability of the buoyancy material preparation can be improved based on the simplified buoyancy material preparation method, the mixing uniformity between the components in the buoyancy material can be improved, the damping performance of the buoyancy material can be enhanced, and the water absorption rate of the buoyancy material can be reduced.

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

[0063] Example 1:

[0064] A preparation method of a damping solid buoyancy material includes the following steps:

[0065] Step one, etching HGM with sodium hydroxide solution (0.5M) at 80℃ for 4 hours to obtain pretreated HGM. Then, rinse HGM thoroughly with ultrapure water to near neutral. Put the rinsed HGM and dopamine hydrochloride (1.6mg / mL) in a solution of Tris-HCl buffer (pH = 8.5, 10mM) and stir at 35℃ for 8 hours to obtain polydopamine coated HGM (HGM@PDA), separate and purify, wash and dry to obtain HGM@PDA.

[0066] Step two, prepare HGM@PDA and react with 3-mercaptopropane sodium sulfonate in a ratio of 5:1 in Tris-HCl buffer solution (pH = 8.5, 40mM) at 55℃ for 12 hours to obtain the expected product (HGM@PDA-SO3H).

[0067] Step three, weigh 100 parts of E51 epoxy resin, 80 parts of polyether amine epoxy curing agent T403, 5 parts of epoxy propane butyl ether 660A, 1 part of BYK011, 3 parts of fumed silica, 75 parts of composite hollow glass microsphere HGM@PDA-SO3H, put into a blender, mix uniformly and vacuum to remove bubbles to obtain a pouring liquid.

[0068] Step four, pour the pouring liquid into the mold, put it into the oven and cure at 80℃ for 24 hours, then demold to obtain the buoyancy material.

[0069] Comparative example 1:

[0070] A preparation method of a damping solid buoyancy material, comprising the following steps:

[0071] Step one, etching HGM with sodium hydroxide solution (0.5M) at 80℃ for 4 hours to obtain pretreated HGM. Then, rinse HGM thoroughly with ultrapure water to near neutral.

[0072] Step two, weigh 100 parts of E51 epoxy resin, 80 parts of polyether amine epoxy curing agent T403, 5 parts of epoxy propane butyl ether 660A, 1 part of BYK011, 3 parts of fumed silica, 75 parts of hollow glass microsphere HGM, put into a blender, mix uniformly and vacuum to remove bubbles to obtain a pouring liquid.

[0073] Step three, pour the pouring liquid of step two into the mold, put it into the oven and cure at 80℃ for 24 hours, then demold to obtain the buoyancy material.

[0074] Comparative example 2:

[0075] A preparation method of a damping solid buoyancy material, comprising the following steps:

[0076] Step one, etching HGM with sodium hydroxide solution (0.5M) at 80°C for 4 hours to obtain pretreated HGM. Then, rinse HGM with ultrapure water to near neutral. Put the rinsed HGM and dopamine hydrochloride (1.6mg / mL) in a solution of Tris-HCl buffer (pH = 8.5, 10mM) and stir at 35°C for 8 hours to obtain polydopamine coated HGM (HGM@PDA). Separate, purify, wash and dry to obtain HGM@PDA.

[0077] Step two, weigh 100 parts of E51 epoxy resin, 80 parts of polyether amine epoxy curing agent T403, 5 parts of propylene oxide butyl ether 660A, 1 part of BYK011, 3 parts of fumed silica, 75 parts of composite hollow glass microspheres HGM@PDA, put into a blender, mix uniformly and vacuum degassing to obtain a pouring liquid.

[0078] Step three, pour the pouring liquid of step two into the mold, put it into the oven and cure at 80°C for 24 hours, then demold to obtain the buoyancy material.

[0079] The solid buoyancy material obtained in the above embodiment 1 and comparative examples 1-2 is tested for various properties, and the test results are shown in Table 1 below:

[0080] Table 1

[0081] Example 1 Comparative Example 1 Comparative Example 2 Density (g / cm 3 )]]> 0.488 0.475 0.482 Compressive 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] As can be seen from Table 1, by using dopamine small molecules to coat the hollow glass microspheres to prepare surface-coated hollow glass microspheres, and then attaching small molecules to the surface to obtain the expected composite hollow glass microspheres, the preparation of the damping solid buoyancy material makes the buoyancy material have excellent damping performance. It also reduces the water absorption of the buoyancy material, and can improve the interfacial force between the components in the buoyancy material, thereby improving the mechanical properties of the material.

[0083] The above only describes the preferred embodiments of the present application and should not be used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method of preparing a damped solid buoyancy material, characterized in that, The method comprises the following steps: Step one, preparation of the preform: select the required concentration of sodium hydroxide solution, use sodium hydroxide solution to etch hollow glass microspheres HGM at a first preset temperature of 80℃, after a first preset time of 4 hours, get the pretreated hollow glass microspheres HGM; rinse the pretreated hollow glass microspheres HGM, and put the rinsed HGM and dopamine hydrochloride in Tris-Hcl buffer solution, stir for 8 hours to get the composite hollow glass microsphere preform HGM@PDA; Step two, preparation of the finished product: put the preform HGM@PDA and 3-mercaptopropane sodium sulfonate in Tris-Hcl buffer solution for reaction for 12 hours to get the expected composite hollow glass microsphere finished product HGM@PDA-SO3H; Step three, preparation of the buoyancy material slurry: weigh the matrix resin, curing agent, diluent, anti-settling agent, defoaming agent and composite hollow glass microsphere finished product HGM@PDA-SO3H according to the required proportion, stir uniformly and defoam to get the required buoyancy material slurry; Step four, after putting the buoyancy material slurry into the mold, put the mold into the oven for heating and curing to form, demold to get the required damping solid buoyancy material; Among them, the matrix resin is 100 parts, the curing agent is 30-120 parts, the diluent is 5-20 parts, the anti-settling agent is 1-5 parts, the defoaming agent is 1-5 parts, and the composite hollow glass microsphere is 50-140 parts.

2. A method of producing a damped solid buoyancy material according to claim 1, characterized in that, The step one comprises: Step S11: preparation of the preform; Step S12: rinse the pretreated hollow glass microspheres HGM until the PH value of the rinsed liquid is 7±α, wherein α is the PH value deviation coefficient; Step S13: put the rinsed hollow glass microspheres HGM and dopamine hydrochloride in Tris-Hcl buffer solution, stir for a second preset time of 8 hours at a second preset temperature of 35℃ to get the composite hollow glass microsphere preform HGM@PDA.

3. A method of producing a damped solid buoyancy material according to claim 2, characterized in that The step three comprises: Step S31: preparation of the buoyancy material slurry: weigh the matrix resin, curing agent, diluent, anti-settling agent, defoaming agent and composite hollow glass microsphere finished product HGM@PDA-SO3H according to the component proportion of the buoyancy material; Step S32: add all the weighed component materials into the stirrer for uniform stirring; or use the batch adding method, first add the matrix resin, curing agent, diluent, anti-settling agent and defoaming agent into the stirrer and mix uniformly to form the resin slurry; then put the composite hollow glass microsphere finished product HGM@PDA-SO3H into the stirrer to mix and stir uniformly with the resin slurry; Step S33: after defoaming treatment, get the buoyancy material slurry.

4. A damped solid buoyancy material, characterized in that, A damping solid buoyancy material is prepared by the preparation method of any one of claims 1-3.

5. A damped solid buoyancy material according to claim 4, wherein, The composite hollow glass microspheres comprise micron-sized hollow glass microspheres.

6. A damped solid buoyancy material according to claim 4, wherein, The matrix resin is bisphenol A type epoxy resin.

7. A damped solid buoyancy material according to claim 4, wherein The curing agent used is an epoxy curing agent matched with bisphenol A type epoxy resin.

8. A damped solid buoyancy material according to claim 7, wherein, The category of the epoxy curing agent includes any one of polyether amine epoxy curing agent T403 and amine curing agent 3486.

9. A damped solid buoyancy material according to claim 4, wherein, The diluent is any one of propylene oxide butyl ether 660A, C12-14 fatty glycidyl ether AGE, diglycidyl ether.

10. A damped solid buoyancy material according to claim 4, wherein, The category of the defoaming agent is any one of BYK011, BYK022, ACP-0001.

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