CN108440958B - Reinforced and toughened high-temperature-resistant road material and preparation method thereof - Google Patents
Reinforced and toughened high-temperature-resistant road material and preparation method thereof Download PDFInfo
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Abstract
The invention provides a reinforced and toughened high-temperature-resistant road material and a preparation method thereof, wherein the reinforced and toughened high-temperature-resistant road material is prepared from the following materials: 20-30 parts of divinyl sulfone, 20-40 parts of 1- (2-aminoethyl) piperazine, 140-160 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 130-150 parts of curing agent. Aiming at the problems of physical treatment and chemical treatment in the prior art, 1- (2-aminoethyl) piperazine and divinyl sulfone are utilized to prepare hyperbranched polysulfone amine; treating the heterocyclic aramid fiber by using a reducing medium and a nitrating medium to obtain the heterocyclic aramid fiber with amino on the surface; grafting the obtained hyperbranched polysulfonamide to the surface of the nitrified heterocyclic aramid fiber, and uniformly spreading and flatly paving the fiber to form a framework; and (3) uniformly pouring a pouring material prepared from epoxy resin and a curing agent on the tiled fiber framework, and curing to obtain the reinforced toughened high-temperature-resistant road material. The material has the advantages of easily obtained raw materials, controllable reaction process, reduction of process difficulty and excellent mechanical property.
Description
Technical Field
The invention belongs to the field of road materials, relates to a road material, and particularly relates to a reinforced and toughened high-temperature-resistant road material and a preparation method thereof.
Background
At present, the pavement bonding layer of the steel bridge deck mainly comprises two materials of asphalt and reactive resin. Epoxy resins have long been introduced into the home as representative of reactive resinous materials. However, most epoxy resins are room temperature curable materials, and have low toughness after curing and certain insufficient high temperature resistance, so the toughening of epoxy resins becomes a focus and difficulty of the application thereof. The modification of epoxy resin with fiber is one of the important toughening means. The heterocyclic fiber has the characteristics of high strength, high temperature resistance, chemical corrosion resistance and the like, but the fiber has smooth surface and low chemical activity, and can generate good bonding effect with a resin matrix after surface treatment. Currently common methods of fiber surface modification include chemical and physical methods. The chemical method comprises surface etching, surface grafting, rare earth element modification and the like, and the physical method comprises plasma treatment, gamma ray radiation treatment, ultrasonic dipping treatment and the like. However, the chemical modification reaction process is not easy to control, the physical method and equipment have high requirements and high cost, and the two methods can damage the fibers to different degrees, reduce the strength of the fibers and further influence the modification effect of the fibers on the epoxy resin.
Therefore, it is urgently needed to develop a reinforced and toughened high-temperature-resistant road material, which has a simple preparation process and a controllable reaction process, can reduce the modification difficulty of epoxy resin, and can improve the curing strength, toughness and high-temperature resistance of the epoxy resin.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a reinforcing and toughening high-temperature-resistant road material and a preparation method thereof, and solves the problems of low toughness and poor high-temperature resistance of the cured epoxy resin.
In order to solve the technical problems, the invention adopts the following technical scheme:
a reinforced and toughened high-temperature-resistant road material is prepared from the following raw materials in parts by weight: 20-30 parts of divinyl sulfone, 20-30 parts of 1- (2-aminoethyl) piperazine, 140-150 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 130-140 parts of curing agent.
The invention also has the following distinguishing technical characteristics:
preferably, the feed is prepared from the following raw materials in parts by weight: 30 parts of divinyl sulfone, 20 parts of 1- (2-aminoethyl) piperazine, 150 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 140 parts of curing agent.
Preferably, the structural formula of the heterocyclic aramid fiber is as follows:
wherein: the value range of n is 100-200.
Preferably, the curing agent is methyl tetrahydrophthalic anhydride.
The invention also provides a preparation method of the reinforced and toughened high-temperature-resistant road material, which adopts the formula of the reinforced and toughened high-temperature-resistant road material, and comprises the following steps:
step one, preparing hyperbranched polysulfone amine:
adding 1- (2-aminoethyl) piperazine, divinyl sulfone and chloroform into a reaction bottle, sealing, filling nitrogen for 5-10 min, heating and stirring for 120h at 40 ℃, precipitating with methanol after the reaction is finished, sequentially washing the obtained precipitate with methanol and acetone for 3-4 times respectively, and drying in vacuum to obtain white powdery solid, namely the hyperbranched polysulfonamide is prepared;
step two, surface treatment of the heterocyclic aramid fiber:
soaking the heterocyclic aramid fiber in acetone, petroleum ether and deionized water in sequence, heating, refluxing and cleaning for 3h respectively, taking out the heterocyclic aramid fiber, and then drying in vacuum at 80 ℃ for 12h to obtain the heterocyclic aramid fiber; then soaking the heterocyclic aramid fiber in a nitration medium, carrying out nitration reaction for 6h at 10 ℃, taking out the heterocyclic aramid fiber, washing the heterocyclic aramid fiber with deionized water, and drying; soaking the dried heterocyclic aramid fiber in a reducing medium, reacting for 24 hours at room temperature, taking out the heterocyclic aramid fiber, washing the heterocyclic aramid fiber with deionized water, and drying to obtain the heterocyclic aramid fiber with amino on the surface;
step three, carrying out surface grafting treatment on the heterocyclic aramid fiber:
dissolving the hyperbranched polysulfonamide prepared in the step one and the heterocyclic aramid fiber with amino on the surface prepared in the step two in dimethyl sulfoxide, infiltrating, and then entering a drying tunnel, wherein the temperature of the drying tunnel is 160 ℃, and carrying out grafting reaction and drying to obtain modified heterocyclic aramid fiber with the surface grafted;
step four, preparing the road material:
firstly, uniformly spreading and flatly paving modified heterocyclic aramid fibers grafted on the surface to form a fiber framework;
then, adding a curing agent into the epoxy resin and mixing to form a casting material;
and finally, uniformly pouring the obtained pouring material on a flat fiber framework, wherein the curing temperature is 80 ℃, and obtaining the reinforcing and toughening high-temperature-resistant road material.
Preferably, the nitration medium is a mixture obtained by uniformly mixing 40 parts by weight of fuming nitric acid, 2 parts by weight of concentrated sulfuric acid, 370 parts by weight of acetic anhydride and 100 parts by weight of glacial acetic acid.
Preferably, the reducing medium is a mixed solution prepared according to the following mixture ratio: each 0.12g of potassium dihydrogenphosphate, 0.36g of dipotassium hydrogenphosphate and 0.55g of sodium borohydride was dissolved in 200mL of tetrahydrofuran.
Further, the hyperbranched polysulfone amine prepared in the step one is subjected to amino end capping treatment according to the following process:
adding 30mL of chloroform into hyperbranched polysulfone amine, dissolving 2mL of triethylamine into 15mL of chloroform, adding a chloroform solution of triethylamine into the hyperbranched polysulfone amine, stirring the solution, dripping 10mL of benzoyl chloride into the mixed solution, stirring at room temperature for reaction for 10 hours, precipitating with 500mL of tetrahydrofuran, and carrying out suction filtration, washing and drying on the precipitate to obtain the hyperbranched polysulfone amine subjected to amino end capping treatment.
Compared with the prior art, the invention has the following technical effects:
the invention firstly uses the hyperbranched polysulfone amine in the fiber modification field. The hyperbranched polysulfone amine has the advantages of easily available raw materials, one-step synthesis, simple operation and good process controllability.
The heterocyclic aramid fiber adopted by the invention is a wholly aromatic heterocyclic polyamide with a main chain containing pyridine rings, can be dissolved in organic solvents such as dimethyl sulfoxide, N-dimethylformamide and the like, has a melting point of more than 360 ℃, and has excellent properties such as high strength, high modulus, high temperature resistance, chemical corrosion resistance and the like.
(III) the hyperbranched polysulfone amine has high branching degree, has a three-dimensional spherical structure, has a large amount of active functional groups such as terminal amino, vinyl, primary amino, secondary amino and the like in molecules, has good fluidity and solubility, and can be smoothly grafted to the surface of the heterocyclic aramid fiber; the surface activity of the heterocyclic aramid fiber grafted with the hyperbranched polysulfone amine is improved, and the bonding effect between the heterocyclic aramid fiber and the epoxy resin can be effectively improved.
(IV) the hyperbranched polysulfonamide grafted on the surface of the heterocyclic aramid fiber can be lapped with an epoxy resin matrix to form a semi-interpenetrating network. The composite material formed by the hyperbranched polysulfone amine, the heterocyclic aramid fiber and the epoxy resin can achieve excellent toughening effect of the epoxy resin.
(V) the heterocyclic aramid fiber grafted with hyperbranched polysulfone amine in the road material prepared by the invention can effectively overcome the defects of low toughness and poor high-temperature performance of the cured epoxy resin, and can be widely applied to various bridge deck pavement bonding layers.
The present invention will be explained in further detail with reference to examples.
Detailed Description
The present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention fall within the protection scope of the present invention.
Example 1:
the embodiment provides a reinforcing and toughening high-temperature-resistant road material which is prepared from the following raw materials in parts by weight: 20 parts of divinyl sulfone, 40 parts of 1- (2-aminoethyl) piperazine, 150 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 140 parts of curing agent.
Wherein, the structural formula of the heterocyclic aramid fiber is as follows:
wherein: the value range of n is 100-200.
The heterocyclic aramid fiber is a wholly aromatic heterocyclic polyamide with a main chain containing pyridine rings, can be dissolved in organic solvents such as dimethyl sulfoxide, N-dimethylformamide and the like, and has a melting point of more than 360 ℃.
The epoxy resin is bisphenol A type epoxy resin, has a slightly yellow appearance, an epoxy value of 0.41, a viscosity of 14.2 pas and a number average molecular weight of 487.
The curing agent is methyl tetrahydrophthalic anhydride.
The preparation method of the reinforcing and toughening high-temperature-resistant road material comprises the following steps:
step one, preparing hyperbranched polysulfone amine:
adding 1- (2-aminoethyl) piperazine, divinyl sulfone and chloroform into a reaction bottle, sealing, filling nitrogen for 5-10 min, heating and stirring for 120h at 40 ℃, precipitating with methanol after the reaction is finished, sequentially washing the obtained precipitate with methanol and acetone for 3-4 times respectively, and drying in vacuum to obtain white powdery solid, namely the hyperbranched polysulfonamide is prepared;
step two, surface treatment of the heterocyclic aramid fiber:
soaking the heterocyclic aramid fiber in acetone, petroleum ether and deionized water in sequence, heating, refluxing and cleaning for 3h respectively, taking out the heterocyclic aramid fiber, and then drying in vacuum at 80 ℃ for 12h to obtain the heterocyclic aramid fiber; then soaking the heterocyclic aramid fiber in a nitration medium, carrying out nitration reaction for 6h at 10 ℃, taking out the heterocyclic aramid fiber, washing the heterocyclic aramid fiber with deionized water, and drying; soaking the dried heterocyclic aramid fiber in a reducing medium, reacting for 24 hours at room temperature, taking out the heterocyclic aramid fiber, washing the heterocyclic aramid fiber with deionized water, and drying to obtain the heterocyclic aramid fiber with amino on the surface;
step three, carrying out surface grafting treatment on the heterocyclic aramid fiber:
dissolving the hyperbranched polysulfonamide prepared in the step one and the heterocyclic aramid fiber with amino on the surface prepared in the step two in dimethyl sulfoxide, infiltrating, and then entering a drying tunnel, wherein the temperature of the drying tunnel is 160 ℃, and carrying out grafting reaction and drying to obtain modified heterocyclic aramid fiber with the surface grafted;
step four, preparing the road material:
firstly, uniformly spreading and flatly paving modified heterocyclic aramid fibers grafted on the surface to form a fiber framework;
then, adding a curing agent into the epoxy resin and mixing to form a casting material;
and finally, uniformly pouring the obtained pouring material on a flat fiber framework, wherein the curing temperature is 80 ℃, and obtaining the reinforcing and toughening high-temperature-resistant road material.
Wherein:
the nitration medium is a mixture obtained by uniformly mixing 40 parts by weight of fuming nitric acid, 2 parts by weight of concentrated sulfuric acid, 370 parts by weight of acetic anhydride and 100 parts by weight of glacial acetic acid.
The reducing medium is a mixed solution prepared according to the following mixture ratio: each 0.12g of potassium dihydrogenphosphate, 0.36g of dipotassium hydrogenphosphate and 0.55g of sodium borohydride was dissolved in 200mL of tetrahydrofuran.
Example 2:
the embodiment provides a reinforcing and toughening high-temperature-resistant road material which is prepared from the following raw materials in parts by weight: 30 parts of divinyl sulfone, 30 parts of 1- (2-aminoethyl) piperazine, 150 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 140 parts of curing agent.
The selection and specification of the raw materials in this example were the same as in example 1.
The preparation method of the reinforcing and toughening refractory road material of the embodiment is the same as that of the embodiment 1.
Example 3:
the embodiment provides a reinforcing and toughening high-temperature-resistant road material which is prepared from the following raw materials in parts by weight: 30 parts of divinyl sulfone, 20 parts of 1- (2-aminoethyl) piperazine, 150 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 140 parts of curing agent.
The selection and specification of the raw materials in this example were the same as in example 1.
The preparation method of the reinforcing and toughening refractory road material of the embodiment is the same as the step in the embodiment 1 except for the step one.
Step one of this example differs from step one of example 1 in that the hyperbranched polysulfonamide prepared in step one was subjected to amino-capping treatment as follows:
adding 30mL of chloroform into hyperbranched polysulfone amine, dissolving 2mL of triethylamine into 15mL of chloroform, adding a chloroform solution of triethylamine into the hyperbranched polysulfone amine, stirring the solution, dripping 10mL of benzoyl chloride into the mixed solution, stirring at room temperature for reaction for 10 hours, precipitating with 500mL of tetrahydrofuran, and carrying out suction filtration, washing and drying on the precipitate to obtain the hyperbranched polysulfone amine subjected to amino end capping treatment.
Example 4:
the embodiment provides a reinforcing and toughening high-temperature-resistant road material which is prepared from the following raw materials in parts by weight: 30 parts of divinyl sulfone, 20 parts of 1- (2-aminoethyl) piperazine, 140 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 140 parts of curing agent.
The selection and specification of the raw materials in this example were the same as in example 1.
The preparation method of the reinforcing and toughening refractory road material of the embodiment is the same as that of the embodiment 3.
Example 5:
the embodiment provides a reinforcing and toughening high-temperature-resistant road material which is prepared from the following raw materials in parts by weight: 30 parts of divinyl sulfone, 20 parts of 1- (2-aminoethyl) piperazine, 160 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 140 parts of curing agent.
The selection and specification of the raw materials in this example were the same as in example 1.
The preparation method of the reinforcing and toughening refractory road material of the embodiment is the same as that of the embodiment 3.
Example 6:
the embodiment provides a reinforcing and toughening high-temperature-resistant road material which is prepared from the following raw materials in parts by weight: 30 parts of divinyl sulfone, 20 parts of 1- (2-aminoethyl) piperazine, 150 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 130 parts of curing agent.
The selection and specification of the raw materials in this example were the same as in example 1.
The preparation method of the reinforcing and toughening refractory road material of the embodiment is the same as that of the embodiment 3.
Example 7:
the embodiment provides a reinforcing and toughening high-temperature-resistant road material which is prepared from the following raw materials in parts by weight: 30 parts of divinyl sulfone, 20 parts of 1- (2-aminoethyl) piperazine, 150 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 150 parts of curing agent.
The selection and specification of the raw materials in this example were the same as in example 1.
The preparation method of the reinforcing and toughening refractory road material of the embodiment is the same as that of the embodiment 3.
Comparative example 1:
the comparative example provides a road material which is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin and 140 parts of curing agent.
The selection and specification of the raw materials in this comparative example are the same as in example 1.
This comparative example differs from example 3 in that no modification treatment was performed on the epoxy resin.
The preparation method of the road material of the comparative example is carried out according to the following steps: and adding a curing agent into the epoxy resin to prepare a casting material, uniformly spreading and casting the obtained casting material, wherein the curing temperature is 80 ℃, and thus obtaining the road material.
Comparative example 2:
the comparative example provides a road material which is prepared from the following raw materials in parts by weight: 30 parts of divinyl sulfone, 20 parts of 1- (2-aminoethyl) piperazine, 100 parts of epoxy resin and 140 parts of curing agent.
The selection and specification of the raw materials in this comparative example are the same as in example 1.
This comparative example differs from example 1 in that only hyperbranched polysulfone amine was used to modify the epoxy resin.
The preparation method of the road material of the comparative example is carried out according to the following steps:
step one, the same as step one of embodiment 3.
Step two, preparing the road material:
the step corresponds to the fourth step of the embodiment 3, and the specific process is as follows: uniformly stirring the epoxy resin, the curing agent and the hyperbranched polysulfone amine, then flatly paving the mixture, and curing the mixture at the temperature of 80 ℃ to obtain the road material.
The preparation of this comparative example did not include step two and step three of example 3.
Comparative example 3:
the comparative example provides a road material which is prepared from the following raw materials in parts by weight: 150 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 140 parts of curing agent.
The selection and specification of the raw materials in this comparative example are the same as in example 1.
This comparative example differs from example 3 in that only the heterocyclic aramid fiber was used to modify the epoxy resin.
The preparation method of the road material of the comparative example is carried out according to the following steps:
step one, the same as step two of example 3.
Step two, preparing the road material:
the step corresponds to the fourth step of the embodiment 3, and the specific process is as follows: and adding a curing agent into the epoxy resin to prepare a casting material, and uniformly casting the obtained casting material on a flat fiber framework, wherein the curing temperature is 80 ℃, so that the road material is obtained.
This comparative example was prepared without the first and third steps of example 3.
And (3) performance testing: in order to verify the tensile strength, elongation at break, shear strength and adhesive strength of the road material, the road material prepared in the examples of the present invention and the comparative examples was subjected to the basic performance test according to the regulations of the waterproof coating material test for construction (GB/T16777-2008), and the results are shown in Table 1.
Table 1 results of performance testing
Analysis of Table 1 reveals that:
(A) under the condition that the weight of the heterocyclic aramid fiber, the epoxy resin and the curing agent is not changed, the feeding ratio of the divinyl sulfone to the 1- (2-aminoethyl) piperazine is 3: the highest yield can be achieved when 2 hours.
(B) Compared with the unmodified epoxy resin, the tensile strength and the elongation at break of the material for the reinforced and toughened high-temperature-resistant road are improved, which indicates that the strength of the material is improved; the bending does not crack under the condition of minus 20 ℃ and 90 ℃, which indicates that the toughness of the material is enhanced; compared with the normal temperature (25 ℃), the reduction of the shear strength and the bonding strength under the high temperature (70 ℃) condition is not obvious, which indicates that the high temperature resistance of the material is enhanced.
(C) Compared with epoxy resin treated by hyperbranched polysulfone amine, the reinforced and toughened high-temperature-resistant road material has better performance because the heterocyclic aramid fiber can effectively improve the strength of the epoxy resin.
(D) Compared with epoxy resin treated by heterocyclic aramid fiber, the reinforced and toughened high-temperature-resistant road material has better performance because a large number of active groups exist on the surface of the heterocyclic aramid fiber modified by hyperbranched polysulfone amine, and the groups can be chemically bonded with the epoxy resin, so that the bonding strength of the heterocyclic aramid fiber and the epoxy resin is effectively improved.
(E) Comparing the indexes of examples 1 to 7, it can be seen that the indexes of example 3 are the most preferable.
Claims (8)
1. The reinforced and toughened high-temperature-resistant road material is characterized by being prepared from the following raw materials in parts by weight: 20-30 parts of divinyl sulfone, 20-30 parts of 1- (2-aminoethyl) piperazine, 140-150 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 130-140 parts of curing agent;
the heterocyclic aramid fiber is subjected to surface treatment according to the following process:
soaking the heterocyclic aramid fiber in acetone, petroleum ether and deionized water in sequence, heating, refluxing and cleaning for 3h respectively, taking out the heterocyclic aramid fiber, and then drying in vacuum at 80 ℃ for 12h to obtain the heterocyclic aramid fiber; then soaking the heterocyclic aramid fiber in a nitration medium, carrying out nitration reaction for 6h at 10 ℃, taking out the heterocyclic aramid fiber, washing the heterocyclic aramid fiber with deionized water, and drying; and soaking the dried heterocyclic aramid fiber in a reducing medium, reacting for 24 hours at room temperature, taking out the heterocyclic aramid fiber, washing the heterocyclic aramid fiber with deionized water, and drying to obtain the heterocyclic aramid fiber with amino on the surface.
2. The reinforcing and toughening refractory road material as claimed in claim 1, wherein the material is prepared from the following raw materials in parts by weight: 30 parts of divinyl sulfone, 20 parts of 1- (2-aminoethyl) piperazine, 150 parts of heterocyclic aramid fiber, 100 parts of epoxy resin and 140 parts of curing agent.
3. The reinforcing and toughening refractory pavement material of any one of claims 1 to 2, wherein the heterocyclic aramid fiber has a structural formula of:
wherein: the value range of n is 100-200.
4. The reinforced and toughened refractory pavement material as claimed in any one of claims 1 to 2, wherein the curing agent is methyl tetrahydrophthalic anhydride.
5. A preparation method of a reinforced and toughened high-temperature-resistant road material is characterized in that the preparation method adopts the formula of the reinforced and toughened high-temperature-resistant road material as claimed in any one of claims 1 to 2, and the method comprises the following steps:
step one, preparing hyperbranched polysulfone amine:
adding 1- (2-aminoethyl) piperazine, divinyl sulfone and chloroform into a reaction bottle, sealing, filling nitrogen for 5-10 min, heating and stirring for 120h at 40 ℃, precipitating with methanol after the reaction is finished, sequentially washing the obtained precipitate with methanol and acetone for 3-4 times respectively, and drying in vacuum to obtain white powdery solid, namely the hyperbranched polysulfonamide is prepared;
step two, surface treatment of the heterocyclic aramid fiber:
soaking the heterocyclic aramid fiber in acetone, petroleum ether and deionized water in sequence, heating, refluxing and cleaning for 3h respectively, taking out the heterocyclic aramid fiber, and then drying in vacuum at 80 ℃ for 12h to obtain the heterocyclic aramid fiber; then soaking the heterocyclic aramid fiber in a nitration medium, carrying out nitration reaction for 6h at 10 ℃, taking out the heterocyclic aramid fiber, washing the heterocyclic aramid fiber with deionized water, and drying; soaking the dried heterocyclic aramid fiber in a reducing medium, reacting for 24 hours at room temperature, taking out the heterocyclic aramid fiber, washing the heterocyclic aramid fiber with deionized water, and drying to obtain the heterocyclic aramid fiber with amino on the surface;
step three, carrying out surface grafting treatment on the heterocyclic aramid fiber:
dissolving the hyperbranched polysulfonamide prepared in the step one and the heterocyclic aramid fiber with amino on the surface prepared in the step two in dimethyl sulfoxide, infiltrating, and then entering a drying tunnel, wherein the temperature of the drying tunnel is 160 ℃, and carrying out grafting reaction and drying to obtain modified heterocyclic aramid fiber with the surface grafted;
step four, preparing the road material:
firstly, uniformly spreading and flatly paving modified heterocyclic aramid fibers grafted on the surface to form a fiber framework;
then, adding a curing agent into the epoxy resin and mixing to form a casting material;
and finally, uniformly pouring the obtained pouring material on a flat fiber framework, wherein the curing temperature is 80 ℃, and obtaining the reinforcing and toughening high-temperature-resistant road material.
6. The method for preparing the reinforcing and toughening refractory road material according to claim 5, wherein the nitration medium is a mixture of 40 parts by weight of fuming nitric acid, 2 parts by weight of concentrated sulfuric acid, 370 parts by weight of acetic anhydride and 100 parts by weight of glacial acetic acid.
7. The method for preparing the reinforcing and toughening refractory road material according to claim 5, wherein the reducing medium is a mixed solution prepared according to the following mixture ratio: each 0.12g of potassium dihydrogenphosphate, 0.36g of dipotassium hydrogenphosphate and 0.55g of sodium borohydride was dissolved in 200mL of tetrahydrofuran.
8. The method for preparing the reinforced and toughened high-temperature-resistant road material as claimed in claim 5, wherein the hyperbranched polysulfonamide prepared in the first step is subjected to amino-capping treatment according to the following process:
adding 30mL of chloroform into hyperbranched polysulfone amine, dissolving 2mL of triethylamine into 15mL of chloroform, adding a chloroform solution of triethylamine into the hyperbranched polysulfone amine, stirring the solution, dripping 10mL of benzoyl chloride into the mixed solution, stirring at room temperature for reaction for 10 hours, precipitating with 500mL of tetrahydrofuran, and carrying out suction filtration, washing and drying on the precipitate to obtain the hyperbranched polysulfone amine subjected to amino end capping treatment.
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Inventor after: Wang Chaohui Inventor after: Li Zhenxia Inventor after: Fu Yi Inventor after: Chen Qian Inventor after: Zuo Zhiwu Inventor after: Chen Bao Inventor after: Zhang Changlin Inventor after: Zhou Chiwei Inventor after: Li Lin Inventor after: Chen Yuanzhao Inventor before: Wang Chaohui Inventor before: Li Zhenxia Inventor before: Fu Yi Inventor before: Chen Qian Inventor before: Zuo Zhiwu Inventor before: Chen Bao Inventor before: Zhang Changlin Inventor before: Zhou Chiwei Inventor before: Li Lin Inventor before: Chen Yuanzhao |