Floating body material and its preparation process, floating photovoltaic power station

Abstract

The application discloses a floating body material and a preparation process thereof and a floating photovoltaic power station, relates to the photovoltaic technical field, and discloses a floating body material which comprises a main body material and reinforcing fibers, wherein the main body material comprises high-density polyethylene and aluminum-silicon hollow microbeads; the density of the floating body material is less than or equal to 0.96 g / cm3; and the tensile strength of the floating body material is greater than or equal to 27 MPa. The application provides a floating body material with higher strength and lower density, and a floating body prepared from the floating body material can resist the water wave impact of a near-sea water area with sufficient strength without reducing the load.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a floating material and its preparation process, and a floating photovoltaic power station. Background Technology

[0002] Photovoltaics refers to a new type of power generation technology that directly converts solar energy into electrical energy. Large-scale onshore photovoltaic projects typically require a large land area and land resources. Floating photovoltaic power stations are an important development in photovoltaic power generation, moving the "photovoltaic power station" from land to water. They utilize photovoltaic technology to build power stations on oceans and freshwater, and have the characteristics of high power generation, less land occupation, and easy integration with other industries.

[0003] Floating platforms serve as the foundation for floating photovoltaic power plants, and the float is a crucial component of these platforms. Currently, blow-molded floats meet the technical requirements for wave resistance in inland waters. However, when expanding to nearshore waters, the existing blow-molded floats lack sufficient strength, necessitating a reduction in load-bearing capacity to meet wave resistance requirements. Summary of the Invention

[0004] The main purpose of this application is to provide a floating material and its preparation process, as well as a floating photovoltaic power station, in order to solve the technical problem that floating materials in related technologies are difficult to have both high strength and high load-bearing capacity.

[0005] To achieve the above objectives, this application provides a floating material comprising a main material and reinforcing fibers, wherein the main material comprises high-density polyethylene and aluminosilicate hollow microspheres;

[0006] The density of the buoyant material is less than or equal to 0.96 g / cm³. 3 The tensile strength of the floating material is greater than or equal to 27 MPa.

[0007] Furthermore, the aluminum-silicon hollow microspheres account for 10%-20% of the mass of the main material;

[0008] The amount of reinforcing fiber added is 1%-5% of the mass of the main material.

[0009] Furthermore, the melt index of the high-density polyethylene at 190°C and 21.6 kg is 6-16 g / 10 min;

[0010] And / or, the particle size of the aluminum-silicon hollow microspheres is less than 10 μm;

[0011] And / or, the reinforcing fiber includes surface-modified bamboo charcoal fiber;

[0012] And / or, the length of the reinforcing fiber is 1-10 mm.

[0013] Furthermore, the surface-modified bamboo charcoal fiber includes a bamboo charcoal fiber core layer and an antioxidant surface layer.

[0014] Furthermore, the antioxidant surface layer is formed by surface treatment of bamboo charcoal fiber with a surface treatment agent, wherein the surface treatment agent includes n-octane, butyl acrylate, vinyl stearamide, and diaryl secondary amine.

[0015] Further, the mass ratio of the n-octane, the butyl acrylate, the vinyl stearamide, and the diaryl secondary amine is 1:(8-12):(8-12):(8-12);

[0016] And / or, the mass ratio of the bamboo charcoal fiber to the surface treatment agent is (80-100):1.

[0017] Furthermore, the buoyant material also includes at least one of a coupling agent, an antioxidant, and a UV-resistant additive.

[0018] Furthermore, the amount of coupling agent added is 5%-15% of the mass of the aluminum-silicon hollow microspheres;

[0019] And / or, the amount of antioxidant added is 0.01%-0.05% of the mass of the main material;

[0020] And / or, the amount of the UV-resistant additive added is 0.0005%-0.001% of the mass of the main material;

[0021] And / or, the coupling agent includes at least one of silane coupling agents and titanate coupling agents;

[0022] And / or, the antioxidant comprises a primary antioxidant and a secondary antioxidant, wherein the mass ratio of the primary antioxidant to the secondary antioxidant is 1:1, wherein the primary antioxidant comprises at least one of 2,6-di-tert-butyl-p-cresol and 3,5-di-tert-butyl-4-hydroxyphenylpropionate octadecyl alcohol ester, and the secondary antioxidant comprises at least one of triphosphite and dioctadecyl pentaerythritol diphosphite;

[0023] And / or, the UV-resistant additive includes a light stabilizer and a light absorber, wherein the mass ratio of the light stabilizer to the light absorber is 2:1, wherein the light stabilizer includes at least one of light stabilizer 770, light stabilizer 944 and light stabilizer 2020, and the light absorber includes at least one of benzophenone, benzotriazole, triazine and salicylate.

[0024] This application also provides a process for preparing the floating material as described above, the process comprising the following steps:

[0025] The raw materials for the floating body material are mixed into a raw material mixture, wherein the raw materials for the floating body material include at least high-density polyethylene, aluminum-silicon hollow microspheres and reinforcing fibers;

[0026] The raw material mixture is extruded and granulated to obtain raw material particles;

[0027] The raw material particles are blow-molded to obtain the floating material.

[0028] Furthermore, the buoyancy material raw material also includes coupling agents and other additives; the step of mixing the buoyancy material raw material into a raw material mixture includes:

[0029] Aluminum-silicon hollow microspheres were mixed with a coupling agent and mixed at a speed of 200-500 r / min for 20-40 min to obtain surface-modified aluminum-silicon hollow microspheres.

[0030] The surface-modified aluminum-silicon hollow microspheres are mixed with high-density polyethylene, reinforcing fibers and other additives to obtain a raw material mixture.

[0031] Furthermore, the raw material mixture undergoes four stages sequentially during the extrusion granulation process, wherein the temperature of the first stage is 150-160℃, the temperature of the second stage is 170-180℃, the temperature of the third stage is 185-200℃, and the temperature of the fourth stage is 180-190℃.

[0032] Furthermore, the reinforcing fiber includes surface-modified bamboo charcoal fiber, and prior to the step of mixing the buoyancy material raw materials into a raw material mixture, the following is also included:

[0033] Bamboo charcoal fiber and surface treatment agent are premixed for 5-15 minutes to obtain a premixed material;

[0034] The premixed material is mixed at a temperature of 40-60℃ for 20-40 minutes, and after cooling, surface-modified bamboo charcoal fiber is obtained.

[0035] This application also provides a floating photovoltaic power station, which includes a float body made of the float body material described above.

[0036] This application provides a floating material comprising a main material and reinforcing fibers, wherein the main material comprises high-density polyethylene and aluminosilicate hollow microspheres; the density of the floating material is less than or equal to 0.96 g / cm³. 3 The tensile strength of the float material is greater than or equal to 27 MPa. On the one hand, aluminum-silicon hollow microspheres have a low density; by adding aluminum-silicon hollow microspheres, the density of the float material can be effectively reduced, lowering it to 0.96 g / cm³. 3Below, with the overall weight of the floating photovoltaic power station remaining unchanged, as the density of the floating material decreases, the self-weight of the floating body decreases, and the load-bearing capacity can be effectively increased. On the other hand, aluminum-silicon hollow microspheres have high strength. By adding aluminum-silicon hollow microspheres, the strength of the floating material can be increased while reducing its density. However, after adding aluminum-silicon hollow microspheres, the rigidity of the floating material increases, while its toughness decreases. Therefore, reinforcing fibers are also added along with aluminum-silicon hollow microspheres to further enhance the strength and toughness of the floating material, increasing its tensile strength to over 27 MPa. This ensures that the tensile strength of the floating material is sufficient to meet the technical requirements for wave resistance in nearshore waters. Thus, the technical problem of floating materials having both high strength and high load-bearing capacity is solved. This application provides a floating material with high strength and low density. Floats made from this material can have sufficient strength to resist the impact of waves in nearshore waters without reducing the load-bearing capacity. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of the present invention more apparent and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] This application provides a floating material, which includes a main material and reinforcing fibers, wherein the main material includes high-density polyethylene and aluminum-silicon hollow microspheres;

[0039] The density of the buoyant material is less than or equal to 0.96 g / cm³. 3 The tensile strength of the floating material is greater than or equal to 27 MPa.

[0040] In this embodiment, it should be noted that the design life of current floating photovoltaic power stations is 25 years or even longer. As an important support platform for floating photovoltaic power stations, the floating platform is a crucial link in whether the entire photovoltaic power station can operate normally and generate electricity. The float is an important component of the floating platform. Due to limited inland water resources, the development of floating photovoltaic power stations is gradually shifting from inland to offshore. However, compared to inland water resources, the offshore wind and wave environment is more severe, placing higher demands on the strength of the float to withstand the impact of ocean waves.

[0041] The high-density polyethylene has high toughness, strength, corrosion resistance and moisture resistance, making it suitable for processing floating body materials. Floats made of pure high-density polyethylene can meet the technical requirements for wave resistance in inland waters, but their strength is still insufficient in nearshore waters.

[0042] The aluminum-silicon hollow microspheres refer to hollow microspheres containing aluminum and silicon elements. For example, aluminum-silicon hollow microspheres can be made by melting silicon dioxide and aluminum oxide. They can also be glass hollow microspheres, ceramic hollow microspheres, etc., depending on actual needs; this embodiment does not impose any limitations on this. Aluminum-silicon hollow microspheres have good electrical insulation, low density, and high strength. Adding them to the buoyancy material can increase the strength of the buoyancy material while reducing its density. With sufficient strength to resist wave impact, the overall maximum weight of the floating photovoltaic power station remains unchanged. The lower the density of the buoyancy material, the lower the self-weight of the buoyancy, and the more effectively the load-bearing capacity can be increased.

[0043] The reinforcing fiber refers to a fibrous material used to improve strength. The reinforcing fiber may include at least one of aramid fiber, nylon fiber, polyimide fiber, glass fiber, carbon fiber, boron fiber, metal fiber, bamboo charcoal fiber, etc. Compared to granular reinforcing materials, fibrous reinforcing materials can improve both strength and toughness, thus compensating for the technical deficiency of reduced toughness caused by aluminosilicate hollow microspheres while achieving weight reduction and reinforcement. Ultimately, a floating material with high strength, high toughness, and low density can be obtained.

[0044] Furthermore, the aluminum-silicon hollow microspheres account for 10%-20% of the mass of the main material;

[0045] The amount of reinforcing fiber added is 1%-5% of the mass of the main material.

[0046] In this embodiment, the higher the mass percentage of the aluminum-silicon hollow microspheres in the main material, the better the reinforcement and weight reduction effects. However, the rigidity of the float material will also be greater. If the rigidity of the float material is too high, its toughness will be insufficient, making the material brittle and reducing its ability to resist wave impact. On the other hand, the higher the mass percentage of the aluminum-silicon hollow microspheres in the main material, the lower the mass percentage of high-density polyethylene (HDPE) in the main material. HDPE also plays a role in tightly binding various raw materials into a whole in the float material. If the proportion of HDPE is too low, it is difficult to bind the aluminum-silicon hollow microspheres and other raw materials into a whole, making the float material prone to breakage. Furthermore, when the float material is subjected to external forces, the external forces are difficult to disperse, which will also lead to damage to the float material. Therefore, the mass percentage of the aluminum-silicon hollow microspheres in the main material is determined to be 10%-20%, such as 10%, 12%, 15%, 18%, 20%, etc.

[0047] The greater the amount of reinforcing fiber added, the better the strengthening and toughening effect. However, if the amount of reinforcing fiber added is too high, on the one hand, it will lead to an increase in the density of the buoyant material; on the other hand, high-density polyethylene will make it difficult to connect the reinforcing fiber and other raw materials into a whole, making the buoyant material prone to breakage. Furthermore, when the buoyant material is subjected to external force, the force will be difficult to disperse, which will also lead to damage to the buoyant material. Therefore, the amount of reinforcing fiber added is determined to be 1%-5% of the mass of the main material, for example, 1%, 2%, 3%, 4%, 5%, etc.

[0048] Furthermore, the melt index of the high-density polyethylene at 190°C and 21.6 kg is 6-16 g / 10 min;

[0049] And / or, the particle size of the aluminum-silicon hollow microspheres is less than 10 μm;

[0050] And / or, the reinforcing fiber includes surface-modified bamboo charcoal fiber;

[0051] And / or, the length of the reinforcing fiber is 1-10 mm.

[0052] In this embodiment, the higher the melt index of the high-density polyethylene (HDPE), the better its fluidity, the easier it is to mix evenly with other raw materials, and the better its processing performance. However, properties such as strength, hardness, toughness, and aging resistance will decrease accordingly. Therefore, the melt index of the HDPE at 190°C and 21.6 kg is determined to be 6-16 g / 10 min, for example, 6 g / 10 min, 8 g / 10 min, 10 g / 10 min, 12 g / 10 min, 14 g / 10 min, 16 g / 10 min, etc.

[0053] The larger the particle size of the aluminum-silicon hollow microspheres, the lower the density, but the lower their strength and the less uniform their dispersion in the buoyancy material, which in turn reduces the strength of the buoyancy material. Therefore, the particle size of the aluminum-silicon hollow microspheres is determined to be less than 10 μm.

[0054] If the reinforcing fiber is too short, it will not provide sufficient reinforcement. However, if it is too long, its distribution in the buoyancy material will be uneven, its processing performance will be poor, and the processing difficulty and cost will increase. Therefore, the length of the reinforcing fiber is determined to be 1-10 mm, such as 1 mm, 3 mm, 5 mm, 8 mm, 10 mm, etc.

[0055] Bamboo charcoal fiber has low density, high toughness and wear resistance, high strength and low cost. Surface modification of bamboo charcoal fiber can further improve the bonding force between bamboo charcoal fiber and other raw materials, so that the surface-modified bamboo charcoal fiber can be tightly bonded with other raw materials. When subjected to external force, it can help other raw materials to evenly disperse the external force, thereby avoiding damage to the floating material under concentrated external force.

[0056] Furthermore, the surface-modified bamboo charcoal fiber includes a bamboo charcoal fiber core layer and an antioxidant surface layer.

[0057] In this embodiment, since the surface oxide layer of bamboo charcoal fiber has a weak bonding force with raw materials such as high-density polyethylene and aluminum-silicon hollow microspheres after oxidation, the surface of the bamboo charcoal fiber can be subjected to anti-oxidation treatment to form an anti-oxidation surface layer, reducing the oxidation of the core layer of bamboo charcoal fiber and obtaining surface-modified bamboo charcoal fiber with strong anti-oxidation properties. This allows the surface-modified bamboo charcoal fiber to be tightly bonded with other raw materials. When subjected to external force, it can help other raw materials to evenly disperse the external force, thereby preventing the floating material from being damaged under concentrated external force.

[0058] Furthermore, the antioxidant surface layer is formed by surface treatment of bamboo charcoal fiber with a surface treatment agent, wherein the surface treatment agent includes n-octane, butyl acrylate, vinyl stearamide, and diaryl secondary amine.

[0059] In this embodiment, bamboo charcoal fibers can be immersed in a surface treatment agent, allowing the agent to adhere to the surface of the bamboo charcoal fibers and form an antioxidant surface layer. The surface treatment agent includes n-octane, butyl acrylate, vinyl stearamide, and diaryl secondary amine.

[0060] Further, the mass ratio of the butyl acrylate, the vinyl stearamide, and the diaryl secondary amine is 1:(8-12):(8-12):(8-12);

[0061] And / or, the mass ratio of the bamboo charcoal fiber to the surface treatment agent is (80-100):1.

[0062] In this embodiment, the mass ratio of butyl acrylate, vinyl stearamide and diaryl secondary amine is 1:(8-12):(8-12):(8-12), for example, 1:8:10:12, 1:10:10:10, 1:12:12:10, etc.

[0063] The antioxidant surface layer should be as thin as possible while ensuring the antioxidant properties of the bamboo charcoal fiber, so as to avoid affecting the tight connection between the bamboo charcoal fiber core layer and other raw materials. That is, the surface treatment agent should adhere to the bamboo charcoal fiber surface layer as thinly as possible. Therefore, the mass ratio of the bamboo charcoal fiber to the surface treatment agent is determined to be (80-100):1, for example, 80:1, 90:1, 100:1.

[0064] Furthermore, the buoyant material also includes at least one of a coupling agent, an antioxidant, and a UV-resistant additive.

[0065] In this embodiment, the coupling agent can be used to improve the interfacial properties of the reinforcing fibers and / or aluminum-silicon hollow microspheres, prevent the reinforcing fibers and / or aluminum-silicon hollow microspheres from agglomerating, and allow the reinforcing fibers and / or aluminum-silicon hollow microspheres to be dispersed more uniformly.

[0066] Antioxidants are used to improve the antioxidant properties of floating materials, reduce oxidation failure of floating materials during application, and improve the reliability of floating materials.

[0067] Floating photovoltaic power stations need to be exposed to sunlight for a long time. Adding UV-resistant additives can reduce the failure of floating materials under ultraviolet light and improve the reliability of floating materials.

[0068] Furthermore, the amount of the coupling agent added is 5%-15% of the mass of the aluminum-silicon hollow microspheres, for example, 5%, 10%, 15%, etc.

[0069] And / or, the amount of antioxidant added is 0.01%-0.05% of the mass of the main material, for example, 0.01%, 0.03%, 0.05%, etc.;

[0070] And / or, the amount of the UV-resistant additive added is 0.0005%-0.001% of the mass of the main material, for example, 0.0005%, 0.0008%, 0.001%, etc.;

[0071] And / or, the coupling agent includes at least one of silane coupling agents and titanate coupling agents;

[0072] And / or, the antioxidant comprises a primary antioxidant and a secondary antioxidant, wherein the mass ratio of the primary antioxidant to the secondary antioxidant is 1:1, wherein the primary antioxidant comprises at least one of 2,6-di-tert-butyl-p-cresol and 3,5-di-tert-butyl-4-hydroxyphenylpropionate octadecyl alcohol ester, and the secondary antioxidant comprises at least one of triphosphite and dioctadecyl pentaerythritol diphosphite;

[0073] And / or, the UV-resistant additive includes a light stabilizer and a light absorber, wherein the mass ratio of the light stabilizer to the light absorber is 2:1, wherein the light stabilizer includes at least one of light stabilizer 770, light stabilizer 944 and light stabilizer 2020, and the light absorber includes at least one of benzophenone, benzotriazole, triazine and salicylate.

[0074] In this embodiment, the buoyancy material comprises a main material and reinforcing fibers, wherein the main material comprises high-density polyethylene and aluminosilicate hollow microspheres; the density of the buoyancy material is less than or equal to 0.96 g / cm³. 3 The tensile strength of the float material is greater than or equal to 27 MPa. On the one hand, aluminum-silicon hollow microspheres have a low density; by adding aluminum-silicon hollow microspheres, the density of the float material can be effectively reduced, lowering it to 0.96 g / cm³. 3 Below, with the overall weight of the floating photovoltaic power station remaining unchanged, as the density of the floating material decreases, the self-weight of the floating body decreases, and the load-bearing capacity can be effectively increased. On the other hand, aluminum-silicon hollow microspheres have high strength. By adding aluminum-silicon hollow microspheres, the strength of the floating material can be increased while reducing its density. However, after adding aluminum-silicon hollow microspheres, the rigidity of the floating material increases, while its toughness decreases. Therefore, reinforcing fibers are also added along with aluminum-silicon hollow microspheres to further enhance the strength and toughness of the floating material, increasing its tensile strength to over 27 MPa. This ensures that the tensile strength of the floating material is sufficient to meet the technical requirements for wave resistance in nearshore waters. Thus, the technical problem of floating materials having both high strength and high load-bearing capacity is solved. This application provides a floating material with high strength and low density. Floats made from this material can have sufficient strength to resist the impact of waves in nearshore waters without reducing the load-bearing capacity.

[0075] Furthermore, the present invention also provides a process for preparing a floating material, for preparing the floating material as described above, the process for preparing the floating material comprising the following steps:

[0076] Step S10: Mix the raw materials of the floating body material into a raw material mixture, wherein the raw materials of the floating body material include at least high-density polyethylene, aluminum-silicon hollow microspheres and reinforcing fibers;

[0077] Step S20: Extrusion granulation is performed on the raw material mixture to obtain raw material particles;

[0078] Step S30: The raw material particles are blow-molded to obtain the floating material.

[0079] As an example, steps S10-S30 include: first, determining the proportions of various buoyancy material raw materials according to actual needs, and calculating the amount of each raw material to be added. Weighing each raw material according to the predetermined amount, and mixing them thoroughly to obtain a uniformly mixed raw material mixture. Then, adding the raw material mixture to a granulator for extrusion granulation to obtain raw material particles. Finally, adding the raw material particles to a blow molding machine for blow molding to obtain the buoyancy material.

[0080] Furthermore, the buoyancy material raw material also includes coupling agents and other additives; the step of mixing the buoyancy material raw material into a raw material mixture includes:

[0081] Step S11: Mix aluminum-silicon hollow microspheres with a coupling agent and mix at a speed of 200-500 r / min for 20-40 min to obtain surface-modified aluminum-silicon hollow microspheres.

[0082] Step S12: The surface-modified aluminum-silicon hollow microspheres are mixed with high-density polyethylene, reinforcing fibers and other additives to obtain a raw material mixture.

[0083] As an example, steps S11-S12 include: first, weighing aluminum-silicon hollow microspheres and coupling agent according to a predetermined amount, adding them to a mixer, and mixing at high speed at 200-500 r / min for 20-40 min to ensure sufficient coupling between the coupling agent and the aluminum-silicon hollow microspheres, thereby obtaining surface-modified aluminum-silicon hollow microspheres. The rotation speed can be set to 200 r / min, 300 r / min, 400 r / min, 500 r / min, etc., and the mixing time can be 20 min, 30 min, 40 min, etc. Furthermore, high-density polyethylene, reinforcing fibers, and other additives can be added to the surface-modified aluminum-silicon hollow microspheres and mixed together until homogeneous, resulting in a raw material mixture.

[0084] Furthermore, the raw material mixture undergoes four stages sequentially during the extrusion granulation process, wherein the temperature of the first stage is 150-160℃, the temperature of the second stage is 170-180℃, the temperature of the third stage is 185-200℃, and the temperature of the fourth stage is 180-190℃.

[0085] In this embodiment, in order to ensure product quality, the extrusion granulation process can be gradually heated in stages. The initial stage is at a low temperature to avoid the raw materials from heating up rapidly and causing product deformation or scorching. The middle stage is at a higher temperature to ensure that all raw materials are fully melted. After full melting, the temperature drops to avoid prolonged high temperature causing product deformation or scorching.

[0086] Furthermore, the reinforcing fiber includes surface-modified bamboo charcoal fiber, and prior to the step of mixing the buoyancy material raw materials into a raw material mixture, the following is also included:

[0087] Step A10: Premix bamboo charcoal fiber with surface treatment agent for 5-15 minutes to obtain premixed material;

[0088] Step A20: Mix the premixed material at a temperature of 40-60℃ for 20-40 minutes, and after cooling, obtain surface-modified bamboo charcoal fiber.

[0089] In this embodiment, the surface of bamboo charcoal fiber can be modified in advance using a surface treatment agent to enhance the antioxidant properties of the bamboo charcoal fiber surface and prevent the bonding force between the bamboo charcoal fiber surface and other raw materials from decreasing after oxidation.

[0090] As an example, steps A10-A20 include: first, weighing bamboo charcoal fiber and surface treatment agent according to a predetermined amount, adding them to a mixer, and premixing for 5-15 minutes to obtain a premixed material, wherein the premixing time can be 5 minutes, 10 minutes, 15 minutes, etc.; then raising the temperature to 40-60℃ to thermally mix the bamboo charcoal fiber and surface treatment agent for 20-40 minutes, and cooling to obtain surface-modified bamboo charcoal fiber, wherein the thermal mixing time can be 20 minutes, 30 minutes, 40 minutes, etc.

[0091] The floating material preparation process provided by this invention is used to prepare the floating material as described above, solving the technical problem in related technologies that floating materials are difficult to simultaneously possess high strength and high load-bearing capacity. Compared with the prior art, the beneficial effects of the floating material preparation process provided by the embodiments of this invention are the same as those of the floating materials provided in the above embodiments, and other technical features in the floating material preparation process are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0092] The present invention will now be described in detail with reference to specific embodiments and comparative examples. It is to be understood that the following description is merely exemplary and not intended to limit the specific scope of the invention.

[0093] The mass fractions of each component in the buoy materials of Examples 1-4 and Comparative Examples 1-3 are shown in Table 1.

[0094] Table 1

[0095]

[0096] Furthermore, the density and tensile strength of the float materials in the examples and comparative examples were tested. The density test was conducted according to GB / T 1033.1. Method A (impregnation method) was used, with a sample mass greater than 1g, and anhydrous ethanol (density 0.7893g / cm³) was selected as the impregnation solution. 3The density of the tested material was read using a densitometer. Tensile strength test: conducted according to GB / T 1040-2006. Type 5 specimen, 1 mm thick, test speed: 50 mm / min. Test results are shown in Table 2.

[0097] Table 2 Test Results

[0098]

[0099] Table 2 shows that adding reinforcing fibers and aluminosilicate hollow microspheres can simultaneously improve the density and tensile strength of the float material, resulting in a float material with both high tensile strength and low density. As the self-weight of the float material decreases, its load-bearing capacity increases, thus achieving the goal of combining high strength and high load-bearing capacity. Furthermore, Comparative Example 2 shows that if the amount of fiber reinforcement is too high, the density of the float material will be too high, failing to achieve the goal of increasing load-bearing capacity. Comparative Example 3 shows that if the amount of aluminosilicate hollow microspheres is too high, the tensile strength will actually decrease. The aluminosilicate hollow microspheres account for 10%-20% of the mass of the main material, and the amount of reinforcing fibers is 1%-5% of the mass of the main material. Within this range, the float material can achieve both high strength and high load-bearing capacity.

[0100] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the description of this application, or direct or indirect applications in other related technical fields, are similarly included within the patent scope of this application.

Claims

1. A buoyancy material, characterized in that, The floating material includes a main material and reinforcing fibers, wherein the main material includes high-density polyethylene and aluminum-silicon hollow microspheres; The aluminum-silicon hollow microspheres account for 10%-20% of the mass of the main material; The amount of reinforcing fiber added is 1%-5% of the mass of the main material; The reinforcing fiber includes surface-modified bamboo charcoal fiber; The density of the buoyant material is less than or equal to 0.96 g / cm³. 3 The tensile strength of the floating material is greater than or equal to 27 MPa.

2. The buoyancy material as described in claim 1, characterized in that, The high-density polyethylene has a melt index of 6-16 g / 10 min at 190°C and 21.6 kg. And / or, the particle size of the aluminum-silicon hollow microspheres is less than 10 μm; And / or, the length of the reinforcing fiber is 1-10 mm.

3. The buoyancy material as described in claim 2, characterized in that, The surface-modified bamboo charcoal fiber includes a bamboo charcoal fiber core layer and an antioxidant surface layer.

4. The buoyancy material as described in claim 3, characterized in that, The antioxidant surface layer is formed by surface treatment of bamboo charcoal fiber with a surface treatment agent, wherein the surface treatment agent includes n-octane, butyl acrylate, vinyl stearamide, and diaryl secondary amine.

5. The buoyancy material as described in claim 4, characterized in that, The mass ratio of the n-octane, the butyl acrylate, the vinyl stearamide, and the diaryl secondary amine is 1:(8-12):(8-12):(8-12); And / or, the mass ratio of the bamboo charcoal fiber to the surface treatment agent is (80-100):

1.

6. The buoyancy material as described in claim 1, characterized in that, The buoyant material also includes at least one of coupling agent, antioxidant, and UV-resistant additive.

7. The buoyancy material as described in claim 6, characterized in that, The amount of coupling agent added is 5%-15% of the mass of the aluminum-silicon hollow microspheres; And / or, the amount of antioxidant added is 0.01%-0.05% of the mass of the main material; And / or, the amount of the UV-resistant additive added is 0.0005%-0.001% of the mass of the main material; And / or, the coupling agent includes at least one of silane coupling agents and titanate coupling agents; And / or, the antioxidant comprises a primary antioxidant and a secondary antioxidant, wherein the mass ratio of the primary antioxidant to the secondary antioxidant is 1:1, wherein the primary antioxidant comprises at least one of 2,6-di-tert-butyl-p-cresol and 3,5-di-tert-butyl-4-hydroxyphenylpropionate octadecyl alcohol ester, and the secondary antioxidant comprises at least one of triphosphite and dioctadecyl pentaerythritol diphosphite; And / or, the UV-resistant additive includes a light stabilizer and a light absorber, wherein the mass ratio of the light stabilizer to the light absorber is 2:1, wherein the light stabilizer includes at least one of light stabilizer 770, light stabilizer 944 and light stabilizer 2020, and the light absorber includes at least one of benzophenone, benzotriazole, triazine and salicylate.

8. A process for preparing a buoyancy material as described in any one of claims 1-7, characterized in that, The preparation process Includes the following steps: The raw materials for the floating body material are mixed into a raw material mixture, wherein the raw materials for the floating body material include at least high-density polyethylene, aluminum-silicon hollow microspheres and reinforcing fibers; The raw material mixture is extruded and granulated to obtain raw material particles; The raw material particles are blow-molded to obtain the floating material.

9. The preparation process of the buoyancy material as described in claim 8, characterized in that, The float material raw material also includes coupling agents and other additives; the step of mixing the float material raw material into a raw material mixture includes: Aluminum-silicon hollow microspheres were mixed with a coupling agent and mixed at a speed of 200-500 r / min for 20-40 min to obtain surface-modified aluminum-silicon hollow microspheres. The surface-modified aluminum-silicon hollow microspheres are mixed with high-density polyethylene, reinforcing fibers and other additives to obtain a raw material mixture.

10. The preparation process of the buoyancy material as described in claim 8, characterized in that, The raw material mixture undergoes four stages in sequence during the extrusion granulation process, wherein the temperature of the first stage is 150-160℃, the temperature of the second stage is 170-180℃, the temperature of the third stage is 185-200℃, and the temperature of the fourth stage is 180-190℃.

11. The preparation process of the buoyancy material as described in claim 8, characterized in that, The reinforcing fiber includes surface-modified bamboo charcoal fiber, and prior to the step of mixing the buoyancy material raw materials into a raw material mixture, the following is also included: Bamboo charcoal fiber and surface treatment agent are premixed for 5-15 minutes to obtain a premixed material; The premixed material is mixed at a temperature of 40-60℃ for 20-40 minutes, and after cooling, surface-modified bamboo charcoal fiber is obtained.

12. A floating photovoltaic power station, characterized in that, The floating photovoltaic power station includes a float, which is made of the float material as described in claims 1-7.

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