A shape memory prestressed anchor net material and its preparation method

Abstract

The present application provides a shape memory prestressed anchor net material and a preparation method thereof, which prepares a modified styrene-methyl acrylate-butadiene copolymer with attapulgite as a chemical crosslinking point; by mass fraction, 100-110 parts of the modified styrene-methyl acrylate-butadiene copolymer, 3-7 parts of a shape memory promoter, 1-8 parts of a shape memory critical temperature regulator, 1-2 parts of an anti-aging agent, 5-7 parts of a reinforcing agent, 1-3 parts of a plasticizer, 1 part of an antistatic agent and 1-2 parts of a flame retardant are stirred and mixed and melted under the condition of 100-150 °C, and the melt is spun and woven to obtain the anchor net material. The preparation method of the present application has the characteristics of simple process, low cost and easy popularization and application. When the anchor net material provided by the present application is deformed by an external force, with nano-attapulgite as the crystal nucleus, stress-induced crystallization will further improve the crystallinity and orientation degree of the anchor net matrix, and improve the support effect of the anchor net.

Description

Technical Field

[0001] This application relates to the technical field of new materials for anchor nets, and particularly to a shape memory prestressed anchor net material and a preparation method thereof. Background Art

[0002] The anchor net support technology is one of the important means for controlling the surrounding rock of coal mine roadways, and the anchor net material is the key core of the anchor net support technology. Under the action of high ground stress and strong mining disturbance, the surrounding rock of coal mine roadways has a large deformation. The principle of the anchor net is to use the anchor net support to strengthen and improve the shear and compression resistance of the rock strata within a certain range of the roadway roof, form a strengthened bearing arch, resist the deformation of the surrounding rock of the roadway, and achieve the purpose of supporting and maintaining the roadway. Its specific function is to end-anchor the anchor net under a certain pre-tightening force, so that the composite rock strata within the end-anchoring range form a combined beam under the elastic compression of the anchor net. At the same time, the combined beam is suspended by the anchor cable anchored in the stable rock strata under a certain pre-tightening force to further enhance the support strength of the combined beam. Compared with metal nets, polyester anchor nets have the advantages of flexibility, light weight, strong acid and alkali corrosion resistance, and fast installation speed. However, the strength and stiffness of polyester anchor nets still need to be improved compared with metal nets. At the same time, the stiffness of polyester anchor nets is weak, it is difficult to achieve prestressed support, and the support effect is limited.

[0003] Therefore, there is an urgent need to develop a new type of shape memory prestressed anchor net material suitable for broken roadways in coal mines and its preparation method and promote its application. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems in the related art to some extent. This application proposes a shape memory prestressed anchor net material and a preparation method thereof. The preparation method has the characteristics of simple process, low cost and easy promotion and application. When the anchor net material provided by this application is deformed by an external force, with nano-attapulgite as the crystal nucleus, stress-induced crystallization will further improve the crystallinity and orientation degree of the anchor net matrix, and improve the support effect of the anchor net.

[0005] According to an embodiment of the first aspect of this application, a preparation method of a shape memory prestressed anchor net material is proposed, including the following steps:

[0006] Treat the nano-attapulgite to form active sites with carbon-carbon double bonds on its surface; add the modified nano-attapulgite into the mixed active monomers, and react at 250 - 300 °C for 120 - 130 min under the action of a composite catalyst and a protective atmosphere to obtain a modified styrene-acrylate-butadiene copolymer with attapulgite as the chemical crosslinking point;

[0007] By weight parts, 100 - 110 parts of the modified styrene-methyl acrylate-butadiene copolymer, 3 - 7 parts of a shape memory promoter, 1 - 8 parts of a shape memory critical temperature regulator, 1 - 2 parts of an anti-aging agent, 5 - 7 parts of a reinforcing agent, 1 - 3 parts of a plasticizer, 1 part of an antistatic agent, and 1 - 2 parts of a flame retardant are stirred and mixed and melted at 100 - 150 °C, and the melt is spun and woven to obtain an anchor net material.

[0008] In some embodiments, the method for treating the nano-attapulgite to form active sites of carbon-carbon double bonds on its surface is: treating the nano-attapulgite with (3-acryloxypropyl)tris(trimethylsiloxy)-silane, 3-(trimethoxysilyl)butyl methacrylate, and 3-(trimethylsiloxy)propene with a mass ratio of 4:1:1.

[0009] In some embodiments, the mixed active monomers include styrene, methyl methacrylate, and butadiene with a mass ratio of 2:1:5.

[0010] In some embodiments, the composite catalyst includes chloroplatinic(IV) acid and iron nitrate with a mass ratio of 1:7.

[0011] In some embodiments, the shape memory promoter includes vinyl polyhedral oligomeric silsesquioxane and amino polyhedral oligomeric silsesquioxane with a mass ratio of 5:1.

[0012] In some embodiments, the shape memory critical temperature regulator includes polylactic acid, polycaprolactone, and polyglycolide with a mass ratio of 1:1:3.

[0013] In some embodiments, the anti-aging agent includes ethyl 5-bromoindole-2-carboxylate and 4-bromo-2-(trifluoromethyl)quinoline with a mass ratio of 1:2.

[0014] In some embodiments, the reinforcing agent includes pentaerythritol glycidyl ether, ethylene glycol diglycidyl ether, and bisphenol A diglycidyl ether with a mass ratio of 4:1:1.

[0015] According to an embodiment of the second aspect of the present application, a shape memory prestressed anchor net material is proposed, which is obtained by using the preparation method described in any of the above embodiments.

[0016] According to an embodiment of the third aspect of the present application, the anchor net material described in any of the above embodiments is applied to the shape memory prestressed support of a broken roadway.

[0017] The anchor net material of this application contains attapulgite modified with a certain aspect ratio, which plays the role of nanoparticle reinforcement. When the anchor net receives an external load, the nano attapulgite can act as a stress concentration point, inducing a large number of crazes and shear bands, absorbing energy to prevent the destruction of the anchor net. At the same time, the nano attapulgite can also organize the crazes from developing into cracks as a fixed point, thus improving the strength of the anchor net. In addition, in the modified styrene-methyl acrylate-butadiene copolymer, the side groups of the benzene ring and carbon-carbon double bonds in the styrene segment and butadiene segment form a π-π conjugation phenomenon, enhancing the intermolecular force within the anchor net and improving the tensile strength and Young's modulus of the anchor net. At the same time, the side groups of the methyl and ester groups in the methyl acrylate segment of the modified styrene-methyl acrylate-butadiene copolymer are symmetrically distributed along the main chain, with a small internal rotation barrier and good molecular chain flexibility, improving the toughness and impact resistance of the anchor net. Finally, the modified styrene-methyl acrylate-butadiene copolymer is a reversible phase, and the chemically cross-linked attapulgite of the modified styrene-methyl acrylate-butadiene copolymer is a fixed phase. The anchor net material exhibits shape memory characteristics and can achieve the prestressed anchor net support for roadways.

[0018] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned by practice of the present application. Brief Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present application will become apparent and understandable from the following description of the embodiments in conjunction with the drawings, where:

[0020] Figure 1 is a flowchart of the preparation method of the anchor net material proposed in an embodiment of the present application. Detailed Description of the Embodiments

[0021] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application. On the contrary, the present application includes all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0022] The "ranges" disclosed in this application are defined in the form of a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of a particular range. The ranges defined in this way can include or exclude the end values, and can be combined arbitrarily, that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60 - 120 and 80 - 110 are listed for a specific parameter, ranges of 60 - 110 and 80 - 120 are also contemplated. In addition, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4, and 5 are listed, then the following ranges are all contemplated: 1 - 3, 1 - 4, 1 - 5, 2 - 3, 2 - 4, and 2 - 5. In this application, unless otherwise specified, the numerical range "a - b" represents an abbreviated representation of any real number combination between a and b, where both a and b are real numbers. For example, the numerical range "0 - 5" means that all real numbers between "0 - 5" are fully listed herein, and "0 - 5" is only an abbreviated representation of these numerical combinations. Additionally, when stating that a certain parameter is an integer ≥2, it is equivalent to disclosing that the parameter is, for example, the integers 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0023] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this article, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0024] To achieve the above object, according to an embodiment of the first aspect of this application, a preparation method of a shape memory prestressed anchor mesh material is as Figure 1 shown, including the following steps:

[0025] S1: Treat nano-attapulgite to form active sites with carbon-carbon double bonds on its surface; add the modified nano-attapulgite to the mixed active monomers, and react at 250 - 300 °C for 120 - 130 min under the action of a composite catalyst and a protective atmosphere to obtain a modified styrene-acrylate-butadiene copolymer with attapulgite as the chemical crosslinking point;

[0026] S2: By mass, mix 100 - 110 parts of the modified styrene-acrylate-butadiene copolymer, 3 - 7 parts of the shape memory promoter, 1 - 8 parts of the shape memory critical temperature regulator, 1 - 2 parts of the anti-aging agent, 5 - 7 parts of the reinforcing agent, 1 - 3 parts of the plasticizer, 1 part of the antistatic agent, and 1 - 2 parts of the flame retardant, and melt at 100 - 150 °C. Spin and weave the melt to obtain the anchor mesh material.

[0027] Among them, in S1, nano-attapulgite is activated and treated by (3 - acryloxypropyl) tris(trimethylsiloxysilane), 3-(trimethoxysilyl) butyl methacrylate and 3-(trimethylsiloxy) propylene with a mass ratio of 4:1:1. Carbon-carbon double bond active sites are introduced on its surface through amphiphilic substances; thus, the nano-attapulgite with modified carbon-carbon double bond active sites on its surface is obtained. The modified nano-attapulgite is added to the mixed active monomers composed of styrene, methyl methacrylate and butadiene, where the mass ratio of styrene, methyl methacrylate and butadiene is 2:1:5; then a composite catalyst composed of chloroplatinic(IV) acid and iron nitrate with a mass ratio of 1:7 is added, and auxiliary heating is carried out to promote the polymerization reaction of carbon-carbon double bonds. A protective gas, such as nitrogen, is introduced, and the reaction is carried out at 250 - 300 °C for 120 - 130 min in a microwave reaction tube to prepare a modified styrene-methyl acrylate-butadiene copolymer with attapulgite as the chemical cross-linking point.

[0028] This application uses (3 - acryloxypropyl) tris(trimethylsiloxysilane), 3-(trimethoxysilyl) butyl methacrylate and 3-(trimethylsiloxy) propylene with a mass ratio of 4:1:1 to jointly treat nano-attapulgite, so that a large number of polar groups are formed on the surface of the nano-attapulgite. The molecular repulsive force between the polar groups makes the attapulgite disperse more evenly, preventing its agglomeration. During the formation of the anchor net material, the chemical cross-linking point attapulgite and the modified styrene-methyl acrylate-butadiene copolymer inside the anchor net are dispersed more evenly, improving the overall performance and the support effect. When the anchor net made of the applied anchor net material is deformed by an external force, with the nano-attapulgite as the crystal nucleus, stress-induced crystallization will further improve the crystallinity and orientation degree of the anchor net matrix, improving the support effect of the anchor net.

[0029] Among them, in S2, by mass, a set stoichiometric amount of the modified styrene-methyl acrylate-butadiene copolymer, shape memory promoter, shape memory critical temperature regulator, anti-aging agent, reinforcing agent, plasticizer, antistatic agent and flame retardant are stirred and mixed and melted at 100 - 150 °C, and the melt is spun and woven to obtain the anchor net material.

[0030] Among them, in this embodiment, the anchor net material includes 100 - 110 parts by mass of a modified styrene-methyl acrylate-butadiene copolymer. In some embodiments, the mass of the modified styrene-methyl acrylate-butadiene copolymer is 100 parts, 101 parts, 104 parts, 105 parts, 107 parts, 108 parts or 110 parts, etc. If the amount of the modified styrene-methyl acrylate-butadiene copolymer is small, such as less than 100 parts, the molecular weight of the formed shape memory prestressed anchor net material is low and the tensile strength is not high. If the amount of the modified styrene-methyl acrylate-butadiene copolymer is large, such as more than 110 parts, the shape recovery rate of the formed shape memory prestressed anchor net material is low and the shape memory performance is weak.

[0031] In this embodiment, the anchor net material includes 3 - 7 parts by mass of a shape memory promoter, and the shape memory promoter includes vinyl polyhedral oligomeric silsesquioxane and amino polyhedral oligomeric silsesquioxane with a mass ratio of 5:1. In some embodiments, the mass of the shape memory promoter is 3 parts, 4 parts, 5 parts, 6 parts or 7 parts, etc. If the amount of the shape memory promoter is small, such as less than 3 parts, the shape recovery rate of the formed shape memory prestressed anchor net material is low and the shape recovery rate is slow. If the amount of the shape memory promoter is large, such as more than 7 parts, the tensile strength of the formed shape memory prestressed anchor net material is low and the mechanical properties are insufficient.

[0032] In this embodiment, the anchor net material includes 1 - 8 parts by mass of a shape memory critical temperature regulator, and the shape memory critical temperature regulator includes polylactic acid, polycaprolactone and polyglycolide with a mass ratio of 1:1:3. In some embodiments, the mass of the shape memory critical temperature regulator is 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts or 8 parts, etc. If the amount of the shape memory critical temperature regulator is small, such as less than 1 part, the shape memory critical temperature of the formed shape memory prestressed anchor net material is high and a higher temperature is required for shape recovery. If the amount of the shape memory critical temperature regulator is large, such as more than 8 parts, the mechanical properties of the formed shape memory prestressed anchor net material are damaged and the tensile strength is insufficient.

[0033] In this embodiment, the anchor net material includes 1 - 2 parts by mass of an anti-aging agent, and the anti-aging agent includes ethyl 5-bromoindole-2-carboxylate and 4-bromo-2-trifluoromethylquinoline with a mass ratio of 1:2. In some embodiments, the mass of the anti-aging agent is 1 part or 2 parts. If the amount of the anti-aging agent is small, such as less than 1 part, the aging rate of the formed shape memory prestressed anchor net material is fast and the mechanical properties decay fast. If the amount of the anti-aging agent is large, such as more than 2 parts, it affects the mechanical properties and shape memory performance of the formed shape memory prestressed anchor net material.

[0034] In this embodiment, the anchor net material includes 5-7 parts by mass of a reinforcing agent, and the reinforcing agent includes pentaerythritol diglycidyl ether, ethylene glycol diglycidyl ether, and bisphenol A diglycidyl ether with a mass ratio of 4:1:1. In some embodiments, the mass fraction of the reinforcing agent is 5 parts, 6 parts, or 7 parts, etc. If the fraction of the reinforcing agent is small, such as less than 5 parts, the reinforcing effect of the shape memory prestressed anchor net material formed is insufficient, and the strength is lost. If the fraction of the reinforcing agent is large, such as more than 7 parts, the shape memory prestressed anchor net material has high rigidity but reduced flexibility.

[0035] In this embodiment, the anchor net material includes 1-3 parts by mass of a plasticizer, and the plasticizer includes dimethyl 3-aminophthalate and 2-ethylhexyl 4-hydroxybenzoate. In some embodiments, the mass fraction of the plasticizer is 1 part, 2 parts, or 3 parts, etc. If the fraction of the plasticizer is large, such as more than 3 parts, it will affect the mechanical properties of the shape memory prestressed anchor net material.

[0036] In this embodiment, the anchor net material includes 1 part by mass of an antistatic agent, and the antistatic agent includes (acryloylaminomethyl) cellulose acetate propionate (CAS No. 97635-64-8) and sodium carboxymethyl cellulose (CAS No.: 404943-62-0). The function of the antistatic agent is to reduce static electricity accumulation and prevent static electricity buildup, thereby protecting the safety of equipment and personnel.

[0037] In this embodiment, the anchor net material includes 1-2 parts by mass of a flame retardant, and the flame retardant includes 4-bromo-2-(2-bromoethyl)-1-methoxybenzene (CAS No.: 163260-76-2) and 4-bromo-3-chloro-2-fluorotoluene (CAS No.: 909122-30-1). In some embodiments, the mass fraction of the flame retardant is 1 part or 2 parts. If the fraction of the flame retardant is small, such as less than 1 part, the antistatic performance of the shape memory prestressed anchor net material is insufficient, presenting a safety hazard. If the fraction of the flame retardant is large, such as more than 2 parts, it will have a negative impact on the mechanical properties and shape memory properties of the shape memory prestressed anchor net material.

[0038] According to an embodiment of the second aspect of the present application, a shape memory prestressed anchor net material is provided, which is obtained by using the preparation method in any of the above embodiments.

[0039] According to an embodiment of the third aspect of the present application, the anchor net material in any of the above embodiments is applied to the shape memory prestressed support in a broken roadway.

[0040] To facilitate a further understanding of the present application, the solutions of the present application will be further described below in conjunction with embodiments. Those skilled in the art will understand that only some examples are described in the present application, and any other suitable specific examples are within the scope of the present application.

[0041] Example 1

[0042] This example provides a shape memory prestressed anchor net material, and its preparation method and specific operation parameters are as follows: Treat nano-attapulgite with (3-acryloxypropyl) tris(trimethylsiloxysilane), 3-(trimethoxysilyl) butyl methacrylate, and 3-(trimethylsiloxysilane) propylene with a mass ratio of 4:1:1 to form modified nano-attapulgite with active sites of carbon-carbon double bonds on the surface of the nano-attapulgite. Add the modified nano-attapulgite to a mixed active monomer composed of styrene, methyl methacrylate, and butadiene, where the mass ratio of styrene, methyl methacrylate, and butadiene is 2:1:5. Then add a composite catalyst composed of chloroplatinic(IV) acid and iron nitrate with a mass ratio of 1:7, assist heating to promote the polymerization reaction of carbon-carbon double bonds, introduce a protective gas such as nitrogen, and react at 300°C for 120 min in a microwave reaction tube to prepare a modified styrene-methyl acrylate-butadiene copolymer with attapulgite as the chemical crosslinking point.

[0043] By mass, 100 parts of the modified styrene-methyl acrylate-butadiene copolymer, 6 parts of the shape memory promoter, 8 parts of the shape memory critical temperature regulator, 1 part of the anti-aging agent, 7 parts of the reinforcing agent, 2 parts of the plasticizer, 1 part of the antistatic agent, and 2 parts of the flame retardant are stirred and mixed and melted at 130°C, and the melt is spun and woven to obtain the anchor net material.

[0044] Example 2

[0045] This example is different from Example 1 as follows: By mass, 110 parts of the modified styrene-methyl acrylate-butadiene copolymer, 3 parts of the shape memory promoter, 1 part of the shape memory critical temperature regulator, 1 part of the anti-aging agent, 5 parts of the reinforcing agent, 1 part of the plasticizer, 1 part of the antistatic agent, and 1 part of the flame retardant are stirred and mixed and melted at 150°C, and the melt is spun and woven to obtain the anchor net material.

[0046] Example 3

[0047] This example is different from Example 1 as follows: By mass, 105 parts of the modified styrene-methyl acrylate-butadiene copolymer, 7 parts of the shape memory promoter, 2 parts of the shape memory critical temperature regulator, 2 parts of the anti-aging agent, 6 parts of the reinforcing agent, 2 parts of the plasticizer, 1 part of the antistatic agent, and 2 parts of the flame retardant are stirred and mixed and melted at 140°C, and the melt is spun and woven to obtain the anchor net material.

[0048] Example 4

[0049] This embodiment is different from Embodiment 1 as follows: By mass, 108 parts of modified styrene-methyl acrylate-butadiene copolymer, 3 parts of shape memory promoter, 4 parts of shape memory critical temperature regulator, 1 part of anti-aging agent, 7 parts of reinforcing agent, 1 part of plasticizer, 1 part of antistatic agent, and 1 part of flame retardant are stirred and mixed and melted at 150 °C, and the melt is spun and woven to obtain an anchor net material.

[0050] Example 5

[0051] This embodiment is different from Embodiment 1 as follows: By mass, 102 parts of modified styrene-methyl acrylate-butadiene copolymer, 7 parts of shape memory promoter, 7 parts of shape memory critical temperature regulator, 2 parts of anti-aging agent, 7 parts of reinforcing agent, 3 parts of plasticizer, 1 part of antistatic agent, and 2 parts of flame retardant are stirred and mixed and melted at 120 °C, and the melt is spun and woven to obtain an anchor net material.

[0052] Experimental Example

[0053] The anchor net materials in each embodiment are woven into a net and then tested, and the results are shown in Table 1.

[0054] Table 1 Performance Results of the Anchor Net Materials in the Embodiments

[0055]

[0056] From the results in Table 1, it can be seen that the anchor net material provided by this application has good support strength and a high shape memory recovery rate, and can improve the support effect of the anchor net compared with the related technology.

[0057] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0058] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A preparation method of a shape memory prestressed anchor net material, characterized in that, It includes the following steps: Processing nano-attapulgite to form active sites with carbon-carbon double bonds on its surface; Adding the modified nano-attapulgite into a mixed active monomer, and reacting at 250 - 300 °C for 120 - 130 min under the action of a composite catalyst and a protective atmosphere to obtain a modified styrene-methyl acrylate-butadiene copolymer with attapulgite as the chemical cross-linking point; the mixed active monomer includes styrene, methyl methacrylate and butadiene with a mass ratio of 2:1:5; By mass, mixing 100 - 110 parts of the modified styrene-methyl acrylate-butadiene copolymer, 3 - 7 parts of a shape memory promoter, 1 - 8 parts of a shape memory critical temperature regulator, 1 - 2 parts of an anti-aging agent, 5 - 7 parts of a reinforcing agent, 1 - 3 parts of a plasticizer, 1 part of an antistatic agent and 1 - 2 parts of a flame retardant, and melting at 100 - 150 °C, and spinning and weaving the melt to obtain an anchor net material; the shape memory promoter includes vinyl polyhedral oligomeric silsesquioxane and amino polyhedral oligomeric silsesquioxane with a mass ratio of 5:1; the shape memory critical temperature regulator includes polylactic acid, polycaprolactone and polyglycolide with a mass ratio of 1:1:

3.

2. According to the preparation method described in claim 1, characterized in that, The method for processing the nano-attapulgite to form active sites with carbon-carbon double bonds on its surface is: co-treating the nano-attapulgite with (3-acryloxypropyl)tris(trimethylsiloxy)-silane, 3-(trimethoxysilyl)butyl methacrylate and 3-(trimethylsiloxy)propene with a mass ratio of 4:1:

1.

3. According to the preparation method described in claim 1, characterized in that, The composite catalyst includes chloroplatinic(IV) acid and iron nitrate with a mass ratio of 1:

7.

4. According to the preparation method described in claim 1, characterized in that, The anti-aging agent includes ethyl 5-bromoindole-2-carboxylate and 4-bromo-2-trifluoromethylquinoline with a mass ratio of 1:

2.

5. According to the preparation method described in claim 1, characterized in that, The reinforcing agent includes pentaerythritol glycidyl ether, ethylene glycol diglycidyl ether and bisphenol A diglycidyl ether with a mass ratio of 4:1:

1.

6. A shape memory prestressed anchor net material, characterized in that, Obtained by using the preparation method described in any one of claims 1 - 5.

7. The application of the anchor net material described in claim 6 in the shape memory prestressed support of a broken roadway.

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