Rubber material resistant to high cumulative dose gamma ray irradiation and preparation method and application thereof

Abstract

The application provides a rubber material resistant to high cumulative dose gamma ray irradiation and a preparation method and application thereof. The rubber material comprises a rubber base material, a porous material and a sensitizer; the porous material and the sensitizer are dispersed in the rubber base material, the sensitizer is loaded on the porous material, and at least part of the sensitizer is filled in the pores of the porous material. When the rubber material of the application works in an irradiation environment, the sensitizer loaded on the porous material can be slowly released, so that the broken rubber molecular chains are reconnected, thereby maintaining good mechanical properties and sealing effect and slowing down the aging of the rubber material.

Description

Technical Field

[0001] This invention relates to the field of rubber materials technology, and in particular to a rubber material that can withstand high cumulative doses of gamma-ray irradiation, its preparation method, and its application. Background Technology

[0002] The nuclear industry is a comprehensive emerging industry that develops and utilizes nuclear energy. It can convert nuclear energy into electrical energy, thermal energy, and mechanical power, obtaining safe, clean, and high-calorific-value energy. The development of the nuclear industry has provided various available radioactive isotope products, isotope instruments, and radiation technologies for industries such as radiation processing, food preservation, and medical diagnostics. It has also greatly promoted the development of fields such as metallurgy, chemical engineering, machinery manufacturing, electronics, radiation chemistry, nuclear medicine, and nuclear electronics.

[0003] During processing and use, various physical, chemical, and biological factors can cause rubber materials to age. Specifically, these factors alter the appearance or internal chemical structure of the rubber material, thereby reducing its mechanical and sealing properties. The aging of rubber materials mainly includes physical aging and chemical aging. Physical aging refers to the inability to return to its original state after long-term exposure to external forces, or damage caused by physical factors that ultimately leads to a loss of sealing performance. The main causes of physical aging are insufficient material properties or unreasonable product structural design. Chemical aging is the primary mode of rubber material aging. Under the influence of chemical factors, the rubber molecular chains change, resulting in macroscopic phenomena such as softening and sticking or hardening and brittleness.

[0004] Rubber materials used in the nuclear industry are highly susceptible to aging due to long-term irradiation by radioactive materials (such as alpha, beta, and gamma rays) in nuclear reactors. When irradiated, the rays interact with rubber molecules, causing them to vibrate violently and break down molecular chains, resulting in a decline in the mechanical and sealing properties of the rubber material. Currently, anti-aging agents are typically added during the rubber material preparation process. These agents capture free radicals generated during rubber aging to achieve anti-aging effects; however, anti-aging agents have drawbacks such as easy precipitation and inability to re-crosslink the rubber material, thus failing to effectively maintain the mechanical properties of the rubber material. Summary of the Invention

[0005] Therefore, it is necessary to provide a rubber material that can maintain good mechanical properties in a high cumulative dose gamma-ray irradiation environment, as well as its preparation method and application. The specific technical solution is as follows:

[0006] According to a first aspect of the present invention, a rubber material is provided, comprising a rubber substrate, a porous material, and a sensitizer;

[0007] The porous material and the sensitizer are dispersed in the rubber substrate, the sensitizer is loaded on the porous material, and at least a portion of the sensitizer fills the pores of the porous material.

[0008] In one embodiment, the mass ratio of the sustained-release sensitizer to the rubber substrate is 1:(2~200); and / or

[0009] The mass ratio of the sensitizer to the porous material is 1:(1~100).

[0010] In one embodiment, the mass ratio of the sustained-release sensitizer to the rubber substrate is 1:(20~100); and / or

[0011] The mass ratio of the sensitizer to the porous material is 1:(1~50).

[0012] In one embodiment, the sensitizer includes at least one of trimethylolpropane triacrylate and pentaerythritol tetraacrylate.

[0013] In one embodiment, the porous material includes at least one of carbon nanotubes, halloysite nanotubes, and sepiolite nanotubes.

[0014] In one embodiment, the rubber substrate includes at least one of butyl rubber vulcanizate, isoprene rubber vulcanizate, and natural rubber vulcanizate.

[0015] According to a second aspect of the present invention, a method for preparing the above-mentioned rubber material is provided, comprising the following steps:

[0016] Provide sensitizers and porous materials to obtain sustained-release sensitizers; and

[0017] The slow-release sensitizer is mixed with rubber raw materials, and then subjected to compounding, thin-passing and vulcanization in sequence to obtain the rubber material.

[0018] In one embodiment, the method for preparing the sustained-release sensitizer includes the following steps:

[0019] The sensitizer, the porous material, and the solvent are mixed to form a mixture, which is then subjected to vacuum adsorption and drying processes to obtain the sustained-release sensitizer.

[0020] In one embodiment, the vacuum adsorption includes the following steps:

[0021] The mixture is first stirred under vacuum, then the vacuum is stopped and a second stirring is performed to break the vacuum; the above steps are repeated 3 to 5 times.

[0022] The vacuum level of the vacuum pump is greater than 1 atm, the first stirring time is 20 min to 40 min, and the second stirring time is 20 min to 60 min.

[0023] According to a third aspect of the present invention, the application of the rubber material described above or the rubber material prepared by the method described above in the preparation of rubber articles is provided.

[0024] According to a fourth aspect of the present invention, a rubber article is provided, comprising the rubber material described above or the rubber material prepared by the method described above.

[0025] Compared with traditional technologies, the present invention has the following beneficial effects:

[0026] When the rubber material of the present invention is used in an irradiated environment, the sensitizer loaded on the porous material can be slowly released, which allows the broken rubber molecular chains to reconnect, thereby maintaining good mechanical properties and sealing effect, and slowing down the aging of the rubber material. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. Unless otherwise specifically stated, all raw materials, reagents, instruments, and equipment used in this invention are commercially available or can be prepared by existing methods.

[0029] In this invention, terms such as "multiple", "various", "multiple times", and "multi-source" are used, and unless otherwise specified, they refer to a quantity greater than or equal to 2. For example, "one or more" means one or more types.

[0030] In this invention, terms such as "further," "even more," and "particularly" are used for descriptive purposes and to indicate differences in content, but should not be construed as limiting the scope of protection of this invention.

[0031] In this invention, "optionally," "optionally," and "optional" mean that they are optional, that is, they are selected from either "with" or "without." If multiple "options" appear in a technical solution, unless otherwise specified and there are no contradictions or mutual constraints, each "option" is independent.

[0032] In this invention, numerical intervals (i.e., numerical ranges) are involved. Unless otherwise specified, the selected numerical distributions within the aforementioned numerical intervals are considered continuous, and include the two endpoints (i.e., the minimum and maximum values) of the numerical range, as well as every value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints. In this document, this is equivalent to directly listing every integer. For example, if t is an integer selected from 1 to 10, it means that t is any integer selected from the group of integers consisting of 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. Furthermore, when multiple ranges are provided to describe features or characteristics, these ranges can be merged. In other words, unless otherwise specified, the ranges disclosed herein should be understood to include any and all subranges to which they are included.

[0033] In a first aspect, the present invention provides a rubber material comprising a rubber substrate, a porous material, and a sensitizer;

[0034] The porous material and sensitizer are dispersed in a rubber substrate, the sensitizer is loaded on the porous material, and at least part of the sensitizer fills the pores of the porous material.

[0035] In this invention, "at least partially" can be understood as not less than 5%, not less than 10%, not less than 20%, not less than 30%, not less than 40%, not less than 50%, not less than 60%, not less than 70%, not less than 80%, not less than 90%, or all of it. In some specific examples, the sensitizer is completely filled into the pores of the porous material.

[0036] In some embodiments, the mass ratio of the sensitizer to the porous material is 1:(1~100); understandably, the mass ratio of the sensitizer to the porous material can be specific values ​​such as 1:1, 1:5, 1:10, 1:15, 1:20, 1:25, 1:30, 1:35, 1:40, 1:50, 1:60, 1:70, 1:80, 1:90, 1:100, etc., but is not limited to these.

[0037] Furthermore, the mass ratio of the sensitizer to the porous material is 1:(1-50); even further, the mass ratio of the sensitizer to the porous material is 1:3.

[0038] Understandably, controlling the mass ratio of sensitizer to porous material within the aforementioned specific range enables the sensitizer to be effectively loaded into the pores of the porous material. Adding too much porous material may reduce the mechanical properties of the rubber.

[0039] In some specific examples, the sensitizer includes at least one of trimethylolpropane triacrylate and pentaerythritol tetraacrylate.

[0040] In some specific examples, the porous material includes at least one of carbon nanotubes, halloysite nanotubes, and sepiolite nanotubes.

[0041] Under high-dose irradiation, rubber molecular chains break and slip; sensitizers can reconnect these chains under irradiation, mitigating the problem of excessive molecular weight breakage and thus achieving anti-aging effects on rubber materials, maintaining their mechanical properties and sealing performance. When sensitizers are loaded into porous materials, they can achieve a slow-release effect, continuously enabling reversible cross-linking of the rubber.

[0042] Porous materials allow sensitizers to be released slowly, preventing them from being completely released from the rubber matrix at once, thus avoiding early reaction consumption and the inability to play a cross-linking role later.

[0043] In some embodiments, the mass ratio of the sensitizer to the rubber substrate is 1:(2~200); understandably, the mass ratio of the sustained-release sensitizer to the rubber substrate can be specific values ​​such as 1:2, 1:5, 1:10, 1:15, 1:20, 1:25, 1:30, 1:35, 1:40, 1:50, 1:60, 1:70, 1:80, 1:90, 1:100, 1:120, 1:150, 1:180, 1:200, etc., but is not limited to these.

[0044] In some embodiments, the rubber substrate includes at least one of butyl rubber vulcanizate, isoprene rubber vulcanizate, and natural rubber vulcanizate.

[0045] Furthermore, the mass ratio of the sensitizer to the rubber substrate is 1:(20~100); even further, the mass ratio of the sensitizer to the rubber substrate is 1:30.

[0046] Understandably, controlling the mass ratio of sensitizer to rubber matrix within the aforementioned specific range enables the rubber matrix to undergo cross-linking after fracture under irradiation, effectively compensating for the rubber's mechanical properties. However, excessive addition of rubber matrix may lead to severe fracture of the rubber matrix under irradiation, resulting in uncompensated mechanical properties and product failure.

[0047] The rubber material of the present invention, under high dose irradiation, the presence of the sensitizer slows down the rate of decrease in its mechanical properties and the aging rate of rubber materials in the nuclear industry, thereby reducing the replacement frequency of rubber materials, saving labor and time costs, and effectively improving the production efficiency of the nuclear industry.

[0048] In a second aspect, the present invention provides a method for preparing the above-mentioned rubber material, comprising steps S10 to S30.

[0049] Step S10: Mix the sensitizer, porous material and solvent to obtain a mixture;

[0050] Step S20: The mixed solution is subjected to vacuum adsorption and drying sequentially to obtain a sustained-release sensitizer;

[0051] Step S30: Mix the slow-release sensitizer with the rubber raw material, and then perform compounding, thin-passing, and vulcanization in sequence to obtain the rubber material.

[0052] In some embodiments, the mass ratio of sensitizer to porous material is 1:(1~100).

[0053] In some embodiments, the sensitizer includes at least one of trimethylolpropane triacrylate and pentaerythritol tetraacrylate.

[0054] In some embodiments, the porous material includes at least one of carbon nanotubes, halloysite nanotubes, and sepiolite nanotubes.

[0055] In some specific examples, the solvent is a chloroform solution or a hexane solution. Further, the sensitizer content in the solvent is 40 wt% to 60 wt%; even further, the sensitizer content in the solvent is 60 wt%.

[0056] In some embodiments, the sensitizer is loaded onto a porous material, and at least a portion of the sensitizer fills the pores of the porous material.

[0057] In some embodiments, vacuum adsorption includes the following steps:

[0058] Under vacuum, the mixture obtained in step S10 is stirred for the first time, then the vacuum is stopped and the second stirring is continued to break the vacuum state; repeat the above steps 3 to 5 times.

[0059] Understandably, in some other embodiments, the number of times the vacuum adsorption is repeated is not limited to those described above.

[0060] In some specific examples, the vacuum level is greater than 1 atm, the first stirring time is 20 min to 40 min, and the second stirring time is 20 min to 60 min. Further, the first stirring time is 30 min, and the second stirring time is 30 min.

[0061] Understandably, vacuum adsorption utilizes atmospheric pressure difference to adsorb the sensitizer into the pores of porous materials. When rubber materials are exposed to radiation for extended periods, the sensitizer is slowly released from the porous material, achieving a lasting reconnection of the rubber molecular chains. However, if the vacuum level in vacuum adsorption is too low, the sensitizer cannot be completely drawn into the pores of the porous material.

[0062] In some embodiments, after vacuum adsorption and before drying, a step of filtering the mixture is included. Specifically, filtration removes turbid liquid from the mixture.

[0063] In some embodiments, the mass ratio of the slow-release sensitizer to the rubber substrate is 1:(5~100).

[0064] In some embodiments, at least one of butyl rubber vulcanizate, isoprene rubber vulcanizate, and natural rubber vulcanizate is included.

[0065] In some embodiments, the rubber raw material includes a sensitizer, a porous material, raw rubber, a vulcanizing agent, and a reinforcing agent.

[0066] In some specific examples, the raw rubber includes at least one of butyl rubber, isoprene rubber, and natural rubber.

[0067] In some specific examples, the vulcanizing agent includes at least one of DCP (dicumyl peroxide), BIBP, sulfur, and a vulcanization accelerator. Optionally, the vulcanization accelerator is selected from at least one of dibenzothiazole disulfide (DM) and tetramethylthiuram disulfide (TMTD).

[0068] Furthermore, the mass ratio of sensitizer to vulcanizing agent is 1:(0.2~2); even further, the mass ratio of sensitizer to vulcanizing agent is 1:1.

[0069] Understandably, the molecular formula of BIBP is C6H4[C(CH3)2OOC(CH3)3]2.

[0070] In some specific examples, the reinforcing agent includes at least one of carbon black, silica, and kaolin. Further, the mass ratio of the sensitizer to the reinforcing agent is 1:(5~100); even further, the mass ratio of the sensitizer to the reinforcing agent is 1:60.

[0071] In some specific examples, step S30 includes steps S31 to S34.

[0072] Step S31: Plasticize the raw rubber in a thin pass;

[0073] Step S32: Mix the plasticized raw rubber with vulcanizing agent and reinforcing agent evenly, then add the mixed powder prepared in step S20, mix evenly, and obtain a mixture;

[0074] Step S33: The mixture from step S32 is subjected to triangular wrapping and thin-pass processing in sequence, and then sheeted to obtain the compounded rubber body;

[0075] Step S34: Let the mixed rubber body from step S33 stand for 22h~26h, and then perform vulcanization molding to obtain the rubber material.

[0076] In some of these examples, the rubber compound was left to stand for 24 hours.

[0077] The method for preparing the rubber material of the present invention involves adding a specific amount of sensitizer and loading it into the pores of a porous material through vacuum adsorption; thus forming a slow-release sensitizer in the rubber substrate. When the rubber material prepared by the above method is applied in an irradiated environment, the sensitizer can re-crosslink broken and slipped rubber molecular chains, thereby maintaining the mechanical properties and sealing effect of the rubber material and delaying aging.

[0078] A third aspect of the present invention provides an application of the above-described rubber material in the preparation of rubber products.

[0079] Specifically, the present invention provides a rubber article comprising the rubber material of any of the above embodiments.

[0080] In some embodiments, the rubber product is a rubber sealing material.

[0081] The present invention will be further described below with reference to specific embodiments and comparative examples, but these should not be construed as limiting the scope of protection of the present invention.

[0082] Example 1:

[0083] (1) Provide 20 parts halloysite nanotubes and 3 parts trimethylolpropane triacrylate, dissolve the trimethylolpropane triacrylate in hexane solution to prepare a hexane solution containing 50 wt% trimethylolpropane triacrylate.

[0084] (2) Mix halloysite nanotubes with a hexane solution containing trimethylolpropane triacrylate and stir to make halloysite nanotubes uniformly dispersed in the solution.

[0085] (3) Turn on the vacuum pump to a vacuum level of 1 atm, and continue stirring under vacuum for 30 minutes. Then turn off the vacuum pump and let the solution continue stirring for 30 minutes to break the vacuum. Repeat the above steps 3 times. Under the action of atmospheric pressure difference, the sensitizer is drawn into the pores of halloysite nanotubes. After the adsorption is completed, filter the turbid liquid of halloysite nanotubes to remove excess solution, and dry it to obtain a sustained-release sensitizer powder with halloysite loaded with sensitizer.

[0086] (4) At room temperature, 100 parts of butyl rubber were plasticized and passed through a two-roll mill, followed by the addition of 3 parts of vulcanizing agent and 50 parts of reinforcing agent; after uniform mixing, 23 parts of halloysite-loaded sensitizer powder prepared in step (3) were added, and after uniform mixing, the mixture was wrapped in a triangular bag 5 to 10 times and passed through a thin sheet; after standing at room temperature for 24 hours, the rubber sealing material was obtained by vulcanization on a flat vulcanizing machine.

[0087] Example 2:

[0088] (1) Provide 10 parts of sepiolite nanotubes and 2 parts of trimethylolpropane triacrylate, dissolve the trimethylolpropane triacrylate in chloroform solution to prepare a chloroform solution containing 50 wt% trimethylolpropane triacrylate.

[0089] (2) Mix sepiolite nanotubes with a chloroform solution containing trimethylolpropane triacrylate and stir to make the sepiolite nanotubes uniformly dispersed in the solution.

[0090] (3) Turn on the vacuum pump to a vacuum level of 1 atm, and continue stirring under vacuum for 30 minutes. Then turn off the vacuum pump and let the solution continue stirring for 30 minutes to break the vacuum. Repeat the above steps 3 times. Under the action of atmospheric pressure difference, the sensitizer is drawn into the pores of sepiolite nanotubes. After the adsorption is completed, filter the turbid liquid of sepiolite nanotubes to remove excess solution, and dry it to obtain the slow-release sensitizer powder loaded with sepiolite nanotubes.

[0091] (4) At room temperature, 100 parts of natural rubber were plasticized and thin-passed on an open mill, and then 9 parts of vulcanizing agent and 40 parts of reinforcing agent were added. After mixing evenly, 12 parts of the slow-release sensitizer powder prepared in step (3) were added. After mixing evenly, the mixture was wrapped in a triangular bag 5 to 10 times and thin-passed into sheets. The sheets were left to stand at room temperature for 24 hours and then vulcanized on a flat vulcanizing machine to obtain rubber sealing material.

[0092] Example 3:

[0093] (1) Provide 5 parts of carbon nanotubes and 1 part of pentaerythritol tetraacrylate, dissolve pentaerythritol tetraacrylate in chloroform solution to prepare a chloroform solution containing 50 wt% pentaerythritol tetraacrylate.

[0094] (2) Mix carbon nanotubes with a chloroform solution containing pentaerythritol tetraacrylate and stir to make the carbon nanotubes uniformly dispersed in the solution.

[0095] (3) Turn on the vacuum pump to a vacuum level of 1 atm, and continue stirring under vacuum for 30 minutes. Then turn off the vacuum pump and let the solution continue stirring for 30 minutes to break the vacuum. Repeat the above steps 3 times. Under the action of atmospheric pressure difference, the sensitizer is drawn into the pores of the carbon nanotubes. After the adsorption is completed, filter the turbid liquid of the carbon nanotubes to remove excess solution, and dry it to obtain the sustained-release sensitizer powder loaded with carbon nanotube sensitizer.

[0096] (4) At room temperature, 100 parts of isoprene rubber were plasticized and thin-passed on an open mill, followed by the addition of 2 parts of vulcanizing agent and 50 parts of reinforcing agent; after uniform mixing, 6 parts of the slow-release sensitizer powder prepared in step (3) were added, and after uniform mixing, the mixture was wrapped in a triangular bag 5 to 10 times and thin-passed into sheets; after standing at room temperature for 24 hours, the sheets were vulcanized and molded on a flat vulcanizing machine to obtain rubber sealing material.

[0097] Example 4:

[0098] The results are basically the same as in Example 2, except that the mass ratio of trimethylolpropane triacrylate (sensitizer) to halloysite nanotubes (porous material) is 1:150, and the mass ratio of trimethylolpropane triacrylate (sensitizer) to butyl rubber raw material (rubber substrate) is 1:150.

[0099] Example 5:

[0100] The results are basically the same as in Example 1, except that the mass ratio of trimethylolpropane triacrylate (sensitizer) to halloysite nanotubes (porous material) is 1:1, and the mass ratio of trimethylolpropane triacrylate (sensitizer) to butyl rubber raw material (rubber substrate) is 1:10.

[0101] Comparative Example 1:

[0102] It is basically the same as Example 1, except that trimethylolpropane triacrylate (sensitizer) is not added in step (1).

[0103] Comparative Example 2:

[0104] It is basically the same as Example 2, except that trimethylolpropane triacrylate (sensitizer) is not added in step (1).

[0105] Comparative Example 3:

[0106] It is basically the same as Example 3, except that pentaerythritol tetraacrylate (sensitizer) is not added in step (1).

[0107] Comparative Example 4:

[0108] It is basically the same as Example 4, except that vacuum adsorption is not performed in step (3).

[0109] The preparation parameters for Examples 1-5 and Comparative Examples 1-4 are shown in Table 1.

[0110] Table 1

[0111]

[0112] Performance testing

[0113] use 60 Co-γ rays were used to treat the rubber sealing materials prepared in Examples 1-5 and Comparative Examples 1-4 with nuclear radiation. The mechanical properties of the rubber sealing materials were tested before radiation, at a cumulative radiation dose of 800 kGy, and at a cumulative radiation dose of 1200 kGy. The test results are shown in Table 2.

[0114] Tensile strength and elongation at break were tested according to GB / T 528-2009, and Shore A hardness was tested according to GB / T531.1-2008. The test environment was a room temperature environment with a pressure of 101 kPa. The sample used for performance testing was a dumbbell-shaped strip with a length of 25 mm, a width of 4 mm, and a thickness of 2 mm.

[0115] Furthermore, to compare the differences in mechanical properties after irradiation, the decrease rates of tensile strength, elongation at break, and Shore hardness of the rubber sealing materials of Examples 1-5 and Comparative Examples 1-4 before re-irradiation and at a cumulative radiation dose of 1200 kGy were calculated. Taking tensile strength as an example, the decrease rate of tensile strength = (tensile strength before irradiation - tensile strength at a cumulative radiation dose of 1200 kGy) / tensile strength before irradiation.

[0116] Table 2

[0117]

[0118] As shown in the table above, when the rubber sealing materials prepared in Comparative Examples 1 to 4 are subjected to continuous irradiation by radioactive materials, the rubber molecular chains slip and break, causing the rubber materials to soften and become sticky, and all aspects of mechanical properties to decrease rapidly; among them, the tensile strength decreased by more than 61%, the elongation at break decreased by 30.03% to 66.21%, and the Shore hardness decreased by 13.21% to 29.09%.

[0119] The rubber materials prepared in Examples 1-5 of this application, when irradiated with radioactive materials, exhibit a slow release of sensitizers, which re-crosslink the rubber molecular chains under irradiation conditions. Tensile strength decreases by 35.89%-37.80%, elongation at break decreases by 29.63%-38.42%, and Shore hardness decreases by only 7.55%-9.09%. The frequency of decrease in all mechanical properties is significantly lower than that in Comparative Examples 1-4, indicating that the rubber sealing materials of Examples 1-5 can better maintain their mechanical properties under irradiation conditions.

[0120] The above results indicate that the rubber material of the present invention uses vacuum adsorption to load the sensitizer into the pores of the porous material, forming a slow-release sensitizer dispersed in the rubber substrate; the sensitizer can reconnect the rubber molecular chains, thereby slowing down the aging rate of the rubber material in the irradiation environment and reducing the replacement frequency of the sealing material.

[0121] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0122] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A rubber material, characterized in that, Includes rubber substrate, porous materials, and sensitizers; The porous material and the sensitizer are dispersed in the rubber substrate, the sensitizer is loaded on the porous material, and at least a portion of the sensitizer fills the pores of the porous material; The sensitizer includes at least one of trimethylolpropane triacrylate and pentaerythritol tetraacrylate, and the porous material includes at least one of carbon nanotubes, halloysite nanotubes and sepiolite nanotubes. The mass ratio of the sensitizer to the rubber substrate is 1:(2~200); the mass ratio of the sensitizer to the porous material is 1:(1~100).

2. The rubber material according to claim 1, characterized in that, The mass ratio of the sensitizer to the rubber substrate is 1:(20~100).

3. The rubber material according to claim 1, characterized in that, The mass ratio of the sensitizer to the porous material is 1:(1~50).

4. The rubber material according to any one of claims 1 to 3, characterized in that, The rubber substrate includes at least one of butyl rubber vulcanizate, isoprene rubber vulcanizate, and natural rubber vulcanizate.

5. A method for preparing a rubber material as described in any one of claims 1 to 4, characterized in that, The steps include the following: Provide sensitizers and porous materials to obtain sustained-release sensitizers; and The slow-release sensitizer is mixed with rubber raw materials, and then subjected to compounding, thin-passing and vulcanization in sequence to obtain the rubber material.

6. The method for preparing the rubber material according to claim 5, characterized in that, The preparation method of the sustained-release sensitizer includes the following steps: The sensitizer, the porous material, and the solvent are mixed to form a mixture, which is then subjected to vacuum adsorption and drying processes to obtain the sustained-release sensitizer.

7. The method for preparing the rubber material according to claim 6, characterized in that, The vacuum adsorption includes the following steps: The mixture is first stirred under vacuum, then the vacuum is stopped and a second stirring is performed to break the vacuum; the above steps are repeated 3 to 5 times. The vacuum level of the vacuum pump is greater than 1 atm, the first stirring time is 20 min to 40 min, and the second stirring time is 20 min to 60 min.

8. The method for preparing the rubber material according to any one of claims 5 to 7, characterized in that, The mass ratio of the sustained-release sensitizer to the rubber substrate is 1:(5~100).

9. The application of the rubber material as described in any one of claims 1 to 4 or the rubber material prepared by the preparation method of any one of claims 5 to 8 in the preparation of rubber products.

10. A rubber product, characterized in that, The rubber material includes the rubber material according to any one of claims 1 to 4 or the rubber material prepared by the preparation method according to any one of claims 5 to 7.

Images