CN112063187A - Antibacterial modified asphalt and preparation method thereof - Google Patents
Antibacterial modified asphalt and preparation method thereof Download PDFInfo
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- CN112063187A CN112063187A CN202010985316.6A CN202010985316A CN112063187A CN 112063187 A CN112063187 A CN 112063187A CN 202010985316 A CN202010985316 A CN 202010985316A CN 112063187 A CN112063187 A CN 112063187A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention discloses bacteriostatic modified asphalt and a preparation method thereof, and relates to the technical field of asphalt processing. The method comprises the steps of mixing asphalt and maleic anhydride to obtain pretreated asphalt, mixing graphene subjected to mixed acid treatment with zinc nitrate hexahydrate, mixing the mixture with 2-methylimidazole in an organic solvent, adding zinc nitrate hexahydrate and modified titanium dioxide, stirring to react to obtain a modified graphene blank, treating the modified graphene blank with a reducing agent solution to obtain modified graphene, mixing epoxy resin with the modified graphene, adding the pretreated asphalt, stirring and mixing to obtain the antibacterial modified asphalt. The antibacterial modified asphalt prepared by the invention has excellent antibacterial performance, good low-temperature crack resistance and good high-temperature resistance.
Description
Technical Field
The invention relates to the technical field of asphalt processing, in particular to bacteriostatic modified asphalt and a preparation method thereof.
Background
Bitumen is a product of the continuous processing of crude oil and is also a mixture of high molecular weight hydrocarbons and their derivatives. The microorganisms take the light components in the asphalt as food, and particularly, the light components in the asphalt are phagocytosed by the mass propagation of the microorganisms under the conditions of dark, humid and polluted working environments for a long time, such as forests, scenic roads, tunnels, rural highways and the like, so that the original stable colloid structure of the asphalt is damaged, the asphalt becomes hard and brittle, the cohesive force is reduced, and the asphalt pavement is damaged in loose, pit and groove types.
In order to inhibit the degradation of microorganisms in the environment to the asphalt and improve the service life of the asphalt pavement, the preparation of the asphalt with the antibacterial effect is an important method. Compared with natural antibacterial agents and organic antibacterial agents, the inorganic antibacterial agent has the advantages of broad antibacterial spectrum, good heat resistance, lasting antibacterial property, higher safety, low toxicity and the like, and is suitable for being used on asphalt pavements. Metal oxide nanoparticles (e.g., silver, titanium, magnesium, zinc, etc.) are currently the primary direction of inorganic antimicrobial research. The nano zinc oxide has the advantages of low cost, stable performance and the like. In addition, the nano zinc oxide is used as an additive, has certain absorption capacity to ultraviolet rays in the asphalt, and delays the ultraviolet aging of the asphalt to a certain extent.
The antibacterial mechanism of nano zinc oxide is generally divided into three categories. The first type is that the surface of the nano zinc oxide can generate active oxides under the illumination condition, and the active oxides have the inhibition effect on the propagation of bacteria. The second type is that the nano zinc oxide can release Zn2+ and Zn2+ in the water-containing medium to enter cells to destroy the cell structure, so that the bacteria lose activity and achieve the bacteriostatic effect. The third is that the nano zinc oxide directly acts on cells, and the electrostatic interaction between the nano zinc oxide and cell walls or membranes causes the integrity of the cells to be damaged.
However, the nano antibacterial agent has poor dispersibility in asphalt due to the characteristics of asphalt, so that the antibacterial performance of the asphalt is affected, and the physical performance of the asphalt is greatly reduced due to the fact that the nano antibacterial agent cannot be uniformly dispersed, so that the use performance of the asphalt is seriously affected.
Disclosure of Invention
The invention aims to provide bacteriostatic modified asphalt and a preparation method thereof, and aims to solve the problems in the background technology.
The bacteriostatic modified asphalt is characterized by mainly comprising the following raw material components in parts by weight: 80-100 parts of pretreated asphalt, 10-20 parts of epoxy resin and 10-15 parts of modified graphene.
Preferably, the pre-treated asphalt is prepared by reacting asphalt with maleic anhydride.
Preferably, the epoxy resin is any one of epoxy resin E-44 or epoxy resin E-51.
Optimally, the modified graphene is prepared from pretreated graphene, zinc nitrate hexahydrate, modified silicon dioxide and 2-methylimidazole; the modified titanium dioxide is prepared from mesoporous titanium dioxide and nano silver; the pretreated graphene is prepared by treating graphene with concentrated sulfuric acid and concentrated nitric acid.
As optimization, the bacteriostatic modified asphalt mainly comprises the following raw material components in percentage by mass: 80 parts of pretreated asphalt, 15 parts of epoxy resin E-41 and 10 parts of modified graphene.
As optimization, the preparation method of the antibacterial modified asphalt mainly comprises the following preparation steps:
(1) mixing asphalt and maleic anhydride, and stirring for reaction to obtain pretreated asphalt;
(2) mixing pretreated graphene and zinc nitrate hexahydrate, stirring for reaction, filtering to obtain a filter cake, mixing the filter cake and 2-methylimidazole in an organic solvent, adding the zinc nitrate hexahydrate and modified titanium dioxide, stirring for reaction to obtain a modified graphene blank, mixing the modified graphene blank with a reducing agent solution, stirring for reaction, filtering, and drying to obtain modified graphene;
(3) mixing epoxy resin with the modified graphene obtained in the step (2), adding the pretreated asphalt obtained in the step (1), and stirring for reaction to obtain bacteriostatic modified asphalt;
(4) and (4) performing index analysis on the bacteriostatic modified asphalt obtained in the step (3).
As optimization, the preparation method of the antibacterial modified asphalt mainly comprises the following preparation steps:
(1) adding asphalt into a reactor, adding maleic anhydride with the mass of 0.01-0.10 times that of the asphalt into the reactor, stirring and reacting for 3-6 h under the condition that the pressure is 0.1-0.5 MPa, and discharging to obtain pretreated asphalt;
(2) mixing pretreated graphene and water in a mass ratio of 1: 100-1: 200 in a beaker, ultrasonically dispersing for 40-60 min, adding zinc nitrate hexahydrate with the mass of 0.1-0.3 time that of the pretreated graphene into the beaker, stirring for reaction, filtering to obtain a filter cake, mixing the filter cake and 2-methylimidazole in the flask in a mass ratio of 1: 2-1: 10, adding dimethyl sulfoxide with the mass of 20-50 times that of the filter cake into the flask, stirring and mixing for 30-40 min at the temperature of 20-35 ℃, adding zinc nitrate hexahydrate with the mass of 0.5-0.8 time that of the filter cake and modified titanium dioxide with the mass of 0.1-0.3 time that of the filter cake into the flask, stirring for reaction, standing for 5-10 h at room temperature, filtering to obtain a modified graphene blank, mixing the modified graphene blank and a reducing agent solution in a mass ratio of 1: 10-1: 20, stirring for reaction, filtering to obtain filter residues, and washing the filter residues with deionized water for 3-8 times to obtain modified graphene;
(3) mixing epoxy resin E-41 and the modified graphene obtained in the step (2) in a shear mixer according to the mass ratio of 1: 1-2: 1, adding pretreated asphalt obtained in the step (1) with the mass being 6-10 times that of the epoxy resin into the shear mixer, and stirring and reacting at the temperature of 140-160 ℃ to obtain bacteriostatic modified asphalt;
(4) and (4) performing index analysis on the bacteriostatic modified asphalt obtained in the step (3).
As an optimization, the preparation method of the pretreated graphene in the step (2) comprises the steps of mixing the graphene with a mixed acid solution according to a mass ratio of 1: 5-1: 10, treating for 30-50 min at room temperature, filtering, and washing to obtain pretreated graphene; the mixed acid solution is prepared by mixing 68% by mass of nitric acid and 75% by mass of sulfuric acid in a volume ratio of 3: 1, mixing to obtain mixed acid liquor.
Optimally, the preparation method of the modified titanium dioxide in the step (2) comprises the steps of mixing cetyl trimethyl ammonium bromide and absolute ethyl alcohol according to the mass ratio of 1: 30-1: 40 to obtain a mixed solution, mixing butyl titanate, absolute ethyl alcohol and a silver nitrate solution with the mass fraction of 2-8% according to the volume ratio of 25:50:7.3 to obtain a solution A, mixing concentrated nitric acid and water, controlling the pH to be 3 to obtain a solution B, dripping the solution B into the solution A at the speed of 1-3 mL/min, adding the mixed solution into the solution A at the speed of 3 s/drop, stirring and mixing to obtain a sol, aging the sol at room temperature for 10 hours, then aging at the temperature of 65 ℃ for 10 hours to obtain a modified titanium dioxide blank, and calcining the modified titanium dioxide blank at the temperature of 450-500 ℃ for 2-3 hours to obtain the modified titanium dioxide.
Preferably, the reducing agent solution in the step (2) is any one of a sodium borohydride solution with the mass fraction of 3-6% or a lithium aluminum hydride solution with the mass fraction of 1-4%.
Compared with the prior art, the invention has the beneficial effects that:
when the antibacterial modified asphalt is prepared, the modified graphene is added into the product, and the asphalt is pretreated. Firstly, after graphene is modified, a metal organic framework material taking zinc as a metal source is grafted on the surface of the graphene, the dispersibility of the modified graphene in asphalt can be improved after the graphene is added into a product, and the graphene is stripped into a lamellar structure under the action of the metal organic framework material, so that the low-temperature crack resistance and the heat resistance of the product can be effectively improved after the graphene is added into the product; moreover, after the asphalt is modified by the maleic anhydride, the modified graphene can be uniformly fixed in an epoxy resin network structure on the surface of the asphalt in the process of mixing the pretreated asphalt, the epoxy resin and the modified graphene, and the antibacterial performance and the service performance of the product are further improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to more clearly illustrate the method provided by the present invention, the following examples are used to describe in detail, and the method for testing each index of the bacteriostatic modified asphalt prepared in the following examples is as follows:
softening point: the softening points of the bacteriostatic modified asphalts obtained in the examples and the comparative products were tested by the ring and ball method according to the standard T-0606.
Low-temperature crack resistance: the bacteriostatic modified asphalt obtained in each example and the comparative example were tested for strain to failure at-40 ℃ according to standard T-0728.
Bacteriostasis: the antibacterial modified asphalt and the comparative products obtained in the examples were tested for the antibacterial efficiency against bacillus and pseudomonad, 10 blocks were taken at different positions, and the average value was taken after 10 times of tests.
Example 1
The bacteriostatic modified asphalt mainly comprises the following components in parts by weight: 80 parts of pretreated asphalt, 15 parts of epoxy resin E-41 and 10 parts of modified graphene.
A preparation method of bacteriostatic modified asphalt mainly comprises the following preparation steps:
(1) adding asphalt into a reactor, adding maleic anhydride with the mass of 0.05 time of that of the asphalt into the reactor, stirring and reacting for 5 hours under the condition that the pressure is 0.3MPa, and discharging to obtain pretreated asphalt;
(2) mixing pretreated graphene and water according to the mass ratio of 1:150 in a beaker, performing ultrasonic dispersion for 40min under the condition of the frequency of 45kHz, adding zinc nitrate hexahydrate with the mass of 0.2 time of that of the pretreated graphene into the beaker, performing stirring reaction, filtering to obtain a filter cake, mixing the filter cake and 2-methylimidazole according to the mass ratio of 1:6 in the flask, adding dimethyl sulfoxide with the mass of 40 times of that of the filter cake into the flask, performing stirring reaction for 40min at the temperature of 28 ℃, adding zinc nitrate hexahydrate with the mass of 0.8 time of that of the filter cake and modified titanium dioxide with the mass of 0.3 time of that of the filter cake into the flask, performing stirring reaction, standing for 8h at room temperature, filtering to obtain a modified graphene blank, mixing the modified graphene blank with a reducing agent solution according to the mass ratio of 1:15, performing stirring reaction, filtering to obtain filter residue, washing the filter residue for 8 times by deionized water, drying the graphene oxide at the temperature of 85 ℃ for 3 hours to obtain modified graphene;
(3) mixing epoxy resin E-41 and the modified graphene obtained in the step (2) in a shearing mixer according to the mass ratio of 1.5:1, adding pretreated asphalt obtained in the step (1) with 6 times of the mass of the epoxy resin into the shearing mixer, and stirring and reacting for 5 hours at the temperature of 150 ℃ to obtain bacteriostatic modified asphalt;
(4) and (4) performing index analysis on the bacteriostatic modified asphalt obtained in the step (3).
As optimization, the preparation method of the pretreated graphene in the step (2) comprises the steps of mixing the graphene with mixed acid liquor according to the mass ratio of 1:80, treating for 40min at room temperature, filtering, and washing to obtain pretreated graphene; the mixed acid solution is prepared by mixing 68% by mass of nitric acid and 75% by mass of sulfuric acid in a volume ratio of 3: 1, mixing to obtain mixed acid liquor.
Optimally, the preparation method of the modified titanium dioxide in the step (2) comprises the steps of mixing cetyl trimethyl ammonium bromide and absolute ethyl alcohol according to the mass ratio of 1:30 to obtain a mixed solution, mixing butyl titanate, absolute ethyl alcohol and a silver nitrate solution with the mass fraction of 5% according to the volume ratio of 25:50:7.3 to obtain a solution A, mixing concentrated nitric acid and water, controlling the pH to be 3 to obtain a solution B, dripping the solution B into the solution A at the speed of 2mL/min, adding the mixed solution into the solution A at the speed of 3 s/drop, stirring and mixing to obtain a sol, aging the sol for 10 hours at room temperature, aging for 10 hours at the temperature of 65 ℃ to obtain a modified titanium dioxide blank, and calcining the modified titanium dioxide blank for 2 hours at the temperature of 450 ℃ to obtain the modified titanium dioxide.
Preferably, the reducing agent solution in the step (2) is a sodium borohydride solution with the mass fraction of 3%.
Example 2
The bacteriostatic modified asphalt mainly comprises the following components in parts by weight: 80 parts of pretreated asphalt and 10 parts of modified graphene.
A preparation method of bacteriostatic modified asphalt mainly comprises the following preparation steps:
(1) adding asphalt into a reactor, adding maleic anhydride with the mass of 0.05 time of that of the asphalt into the reactor, stirring and reacting for 5 hours under the condition that the pressure is 0.3MPa, and discharging to obtain pretreated asphalt;
(2) mixing pretreated graphene and water according to the mass ratio of 1:150 in a beaker, performing ultrasonic dispersion for 40min under the condition of the frequency of 45kHz, adding zinc nitrate hexahydrate with the mass of 0.2 time of that of the pretreated graphene into the beaker, performing stirring reaction, filtering to obtain a filter cake, mixing the filter cake and 2-methylimidazole according to the mass ratio of 1:6 in the flask, adding dimethyl sulfoxide with the mass of 40 times of that of the filter cake into the flask, performing stirring reaction for 40min at the temperature of 28 ℃, adding zinc nitrate hexahydrate with the mass of 0.8 time of that of the filter cake and modified titanium dioxide with the mass of 0.3 time of that of the filter cake into the flask, performing stirring reaction, standing for 8h at room temperature, filtering to obtain a modified graphene blank, mixing the modified graphene blank with a reducing agent solution according to the mass ratio of 1:15, performing stirring reaction, filtering to obtain filter residue, washing the filter residue for 8 times by deionized water, drying the graphene oxide at the temperature of 85 ℃ for 3 hours to obtain modified graphene;
(3) adding the modified graphene obtained in the step (2) into a shear mixer, adding the pretreated asphalt obtained in the step (1) with the mass 8 times that of the modified graphene obtained in the step (2) into the shear mixer, and stirring and reacting for 5 hours at the temperature of 150 ℃ to obtain bacteriostatic modified asphalt;
(4) and (4) performing index analysis on the bacteriostatic modified asphalt obtained in the step (3).
As optimization, the preparation method of the pretreated graphene in the step (2) comprises the steps of mixing the graphene with mixed acid liquor according to the mass ratio of 1:80, treating for 40min at room temperature, filtering, and washing to obtain pretreated graphene; the mixed acid solution is prepared by mixing 68% by mass of nitric acid and 75% by mass of sulfuric acid in a volume ratio of 3: 1, mixing to obtain mixed acid liquor.
Optimally, the preparation method of the modified titanium dioxide in the step (2) comprises the steps of mixing cetyl trimethyl ammonium bromide and absolute ethyl alcohol according to the mass ratio of 1:30 to obtain a mixed solution, mixing butyl titanate, absolute ethyl alcohol and a silver nitrate solution with the mass fraction of 5% according to the volume ratio of 25:50:7.3 to obtain a solution A, mixing concentrated nitric acid and water, controlling the pH to be 3 to obtain a solution B, dripping the solution B into the solution A at the speed of 2mL/min, adding the mixed solution into the solution A at the speed of 3 s/drop, stirring and mixing to obtain a sol, aging the sol for 10 hours at room temperature, aging for 10 hours at the temperature of 65 ℃ to obtain a modified titanium dioxide blank, and calcining the modified titanium dioxide blank for 2 hours at the temperature of 450 ℃ to obtain the modified titanium dioxide.
Preferably, the reducing agent solution in the step (2) is a sodium borohydride solution with the mass fraction of 3%.
Example 3
The bacteriostatic modified asphalt mainly comprises the following components in parts by weight: 80 parts of pretreated asphalt, 15 parts of epoxy resin E-41 and 10 parts of modified graphene.
The preparation method of the antibacterial modified asphalt mainly comprises the following preparation steps:
(1) adding asphalt into a reactor, adding maleic anhydride with the mass of 0.05 time of that of the asphalt into the reactor, stirring and reacting for 5 hours under the condition that the pressure is 0.3MPa, and discharging to obtain pretreated asphalt;
(2) mixing the pretreated graphene and the modified titanium dioxide by the mass ratio of 10: 3, mixing, stirring for reaction, standing for 8 hours at room temperature, filtering to obtain a modified graphene blank, mixing the modified graphene blank with a reducing agent solution according to a mass ratio of 1:15, stirring for reaction, filtering to obtain filter residue, washing the filter residue with deionized water for 8 times, and drying for 3 hours at the temperature of 85 ℃ to obtain modified graphene;
(3) mixing epoxy resin E-41 and the modified graphene obtained in the step (2) in a shearing mixer according to the mass ratio of 1.5:1, adding pretreated asphalt obtained in the step (1) with 6 times of the mass of the epoxy resin into the shearing mixer, and stirring and reacting for 5 hours at the temperature of 150 ℃ to obtain bacteriostatic modified asphalt;
(4) and (4) performing index analysis on the bacteriostatic modified asphalt obtained in the step (3).
As optimization, the preparation method of the pretreated graphene in the step (2) comprises the steps of mixing the graphene with mixed acid liquor according to the mass ratio of 1:80, treating for 40min at room temperature, filtering, and washing to obtain pretreated graphene; the mixed acid solution is prepared by mixing 68% by mass of nitric acid and 75% by mass of sulfuric acid in a volume ratio of 3: 1, mixing to obtain mixed acid liquor.
Optimally, the preparation method of the modified titanium dioxide in the step (2) comprises the steps of mixing cetyl trimethyl ammonium bromide and absolute ethyl alcohol according to the mass ratio of 1:30 to obtain a mixed solution, mixing butyl titanate, absolute ethyl alcohol and a silver nitrate solution with the mass fraction of 5% according to the volume ratio of 25:50:7.3 to obtain a solution A, mixing concentrated nitric acid and water, controlling the pH to be 3 to obtain a solution B, dripping the solution B into the solution A at the speed of 2mL/min, adding the mixed solution into the solution A at the speed of 3 s/drop, stirring and mixing to obtain a sol, aging the sol for 10 hours at room temperature, aging for 10 hours at the temperature of 65 ℃ to obtain a modified titanium dioxide blank, and calcining the modified titanium dioxide blank for 2 hours at the temperature of 450 ℃ to obtain the modified titanium dioxide.
Preferably, the reducing agent solution in the step (2) is a sodium borohydride solution with the mass fraction of 3%.
Comparative example
The bacteriostatic modified asphalt mainly comprises the following components in parts by weight: 80 parts of pretreated asphalt and 10 parts of modified graphene.
The preparation method of the antibacterial modified asphalt mainly comprises the following preparation steps:
(1) adding asphalt into a reactor, adding maleic anhydride with the mass of 0.05 time of that of the asphalt into the reactor, stirring and reacting for 5 hours under the condition that the pressure is 0.3MPa, and discharging to obtain pretreated asphalt;
(2) mixing the pretreated graphene and the modified titanium dioxide by the mass ratio of 10: 3, mixing, stirring for reaction, standing for 8 hours at room temperature, filtering to obtain a modified graphene blank, mixing the modified graphene blank with a reducing agent solution according to a mass ratio of 1:15, stirring for reaction, filtering to obtain filter residue, washing the filter residue with deionized water for 8 times, and drying for 3 hours at the temperature of 85 ℃ to obtain modified graphene;
(3) adding the modified graphene obtained in the step (2) into a shear mixer, adding the pretreated asphalt obtained in the step (1) with the mass 8 times that of the modified graphene obtained in the step (2) into the shear mixer, and stirring and reacting for 5 hours at the temperature of 150 ℃ to obtain bacteriostatic modified asphalt;
(4) and (4) performing index analysis on the bacteriostatic modified asphalt obtained in the step (3).
As optimization, the preparation method of the pretreated graphene in the step (2) comprises the steps of mixing the graphene with mixed acid liquor according to the mass ratio of 1:80, treating for 40min at room temperature, filtering, and washing to obtain pretreated graphene; the mixed acid solution is prepared by mixing 68% by mass of nitric acid and 75% by mass of sulfuric acid in a volume ratio of 3: 1, mixing to obtain mixed acid liquor.
Optimally, the preparation method of the modified titanium dioxide in the step (2) comprises the steps of mixing cetyl trimethyl ammonium bromide and absolute ethyl alcohol according to the mass ratio of 1:30 to obtain a mixed solution, mixing butyl titanate, absolute ethyl alcohol and a silver nitrate solution with the mass fraction of 5% according to the volume ratio of 25:50:7.3 to obtain a solution A, mixing concentrated nitric acid and water, controlling the pH to be 3 to obtain a solution B, dripping the solution B into the solution A at the speed of 2mL/min, adding the mixed solution into the solution A at the speed of 3 s/drop, stirring and mixing to obtain a sol, aging the sol for 10 hours at room temperature, aging for 10 hours at the temperature of 65 ℃ to obtain a modified titanium dioxide blank, and calcining the modified titanium dioxide blank for 2 hours at the temperature of 450 ℃ to obtain the modified titanium dioxide.
Preferably, the reducing agent solution in the step (2) is a sodium borohydride solution with the mass fraction of 3%.
Examples of effects
The following table 1 shows the performance analysis results of the bacteriostatic modified asphalt using examples 1 to 3 of the present invention and the comparative example.
TABLE 1
From the comparison of the experimental data of example 1 and the comparative example in table 1, it can be found that when the modified graphene is added into the product, the sterilization rate of the product to microorganisms can be effectively improved, and the service performance of the modified asphalt is improved to a certain extent; from the comparison of the experimental data of example 1 and example 2, it can be seen that when the product is prepared, the non-reaction of the epoxy resin with the asphalt causes the dispersibility of the modified graphene in the asphalt to be reduced, thereby reducing the overall performance of the product; from the comparison of the experimental data of example 1 and example 3, it can be seen that when the modified asphalt is prepared, the surface of the graphene is not treated, so that the dispersibility of the graphene in the pre-treated asphalt is greatly reduced, and the performance of the product is seriously affected.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The bacteriostatic modified asphalt is characterized by mainly comprising the following raw material components in parts by weight: 80-100 parts of pretreated asphalt, 10-20 parts of epoxy resin and 10-15 parts of modified graphene.
2. The bacteriostatic modified asphalt according to claim 1, wherein the pretreated asphalt is prepared by reacting asphalt with maleic anhydride.
3. The bacteriostatic modified asphalt according to claim 2, wherein the epoxy resin is any one of epoxy resin E-44 or epoxy resin E-51.
4. The bacteriostatic modified asphalt according to claim 3, wherein the modified graphene is prepared from pretreated graphene, zinc nitrate hexahydrate, modified silicon dioxide and 2-methylimidazole; the modified titanium dioxide is prepared from mesoporous titanium dioxide and nano silver; the pretreated graphene is prepared by treating graphene with concentrated sulfuric acid and concentrated nitric acid.
5. The modified asphalt with antibacterial effect according to claim 4, wherein the modified asphalt with antibacterial effect mainly comprises the following raw materials by mass: 80 parts of pretreated asphalt, 15 parts of epoxy resin E-41 and 10 parts of modified graphene.
6. The preparation method of the antibacterial modified asphalt is characterized by mainly comprising the following preparation steps:
(1) mixing asphalt and maleic anhydride, and stirring for reaction to obtain pretreated asphalt;
(2) mixing pretreated graphene and zinc nitrate hexahydrate, stirring for reaction, filtering to obtain a filter cake, mixing the filter cake and 2-methylimidazole in an organic solvent, adding the zinc nitrate hexahydrate and modified titanium dioxide, stirring for reaction to obtain a modified graphene blank, mixing the modified graphene blank with a reducing agent solution, stirring for reaction, filtering, and drying to obtain modified graphene;
(3) mixing epoxy resin with the modified graphene obtained in the step (2), adding the pretreated asphalt obtained in the step (1), and stirring for reaction to obtain bacteriostatic modified asphalt;
(4) and (4) performing index analysis on the bacteriostatic modified asphalt obtained in the step (3).
7. The method of claim 6, wherein the method mainly comprises the following steps:
(1) adding asphalt into a reactor, adding maleic anhydride with the mass of 0.01-0.10 times that of the asphalt into the reactor, stirring and reacting for 3-6 h under the condition that the pressure is 0.1-0.5 MPa, and discharging to obtain pretreated asphalt;
(2) mixing pretreated graphene and water in a mass ratio of 1: 100-1: 200 in a beaker, ultrasonically dispersing for 40-60 min, adding zinc nitrate hexahydrate with the mass of 0.1-0.3 time that of the pretreated graphene into the beaker, stirring for reaction, filtering to obtain a filter cake, mixing the filter cake and 2-methylimidazole in the flask in a mass ratio of 1: 2-1: 10, adding dimethyl sulfoxide with the mass of 20-50 times that of the filter cake into the flask, stirring and mixing for 30-40 min at the temperature of 20-35 ℃, adding zinc nitrate hexahydrate with the mass of 0.5-0.8 time that of the filter cake and modified titanium dioxide with the mass of 0.1-0.3 time that of the filter cake into the flask, stirring for reaction, standing for 5-10 h at room temperature, filtering to obtain a modified graphene blank, mixing the modified graphene blank and a reducing agent solution in a mass ratio of 1: 10-1: 20, stirring for reaction, filtering to obtain filter residues, and washing the filter residues with deionized water for 3-8 times to obtain modified graphene;
(3) mixing epoxy resin E-41 and the modified graphene obtained in the step (2) in a shear mixer according to the mass ratio of 1: 1-2: 1, adding the pretreated asphalt obtained in the step (1) with the mass of 6-10 times that of the epoxy resin into the shear mixer, and stirring for reaction to obtain bacteriostatic modified asphalt;
(4) and (4) performing index analysis on the bacteriostatic modified asphalt obtained in the step (3).
8. The preparation method of the bacteriostatic modified asphalt according to claim 6, wherein the preparation method of the pretreated graphene in the step (2) is to mix graphene and mixed acid solution according to a mass ratio of 1:5 to 1:10, treat the mixture for 30 to 50min at room temperature, filter the mixture, and wash the mixture to obtain pretreated graphene; the mixed acid solution is prepared by mixing 68% by mass of nitric acid and 75% by mass of sulfuric acid in a volume ratio of 3: 1, mixing to obtain mixed acid liquor.
9. The preparation method of the antibacterial modified asphalt according to claim 6, characterized in that the modified titanium dioxide in the step (2) is prepared by mixing cetyl trimethyl ammonium bromide and absolute ethyl alcohol at a mass ratio of 1: 30-1: 40 to obtain a mixed solution, mixing butyl titanate, absolute ethyl alcohol and a silver nitrate solution with a mass fraction of 2-8% at a volume ratio of 25:50:7.3 to obtain a solution A, mixing concentrated nitric acid and water, controlling the pH to be 3 to obtain a solution B, dripping the solution B into the solution A at a speed of 1-3 mL/min, simultaneously adding the mixed solution into the solution A at a speed of 3 s/drop, stirring and mixing to obtain a sol, aging the sol for 10 hours at room temperature, then aging at 65 ℃ for 10 hours to obtain a modified titanium dioxide blank, calcining the modified titanium dioxide blank at a temperature of 450-500 ℃ for 2-3 hours, obtaining the modified titanium dioxide.
10. The method for preparing bacteriostatic modified asphalt according to claim 6, wherein the reducing agent solution in step (2) is any one of a sodium borohydride solution with a mass fraction of 3-6% or a lithium aluminum hydride solution with a mass fraction of 1-4%.
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| CN114768545A (en) * | 2022-03-31 | 2022-07-22 | 青岛吉景新型材料有限公司 | Cellulose nitrate microporous membrane and continuous preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4139511A (en) * | 1976-11-19 | 1979-02-13 | Nippon Oil Company, Ltd. | Asphalt compositions |
| CN101890344A (en) * | 2010-07-27 | 2010-11-24 | 华东理工大学 | Preparation method of graphene/titanium dioxide composite photocatalyst |
| CN104672481A (en) * | 2015-02-13 | 2015-06-03 | 复旦大学 | Metal-organic framework (MOF) modified graphene/polymer hybrid proton exchange membrane and preparation method thereof |
| CN105170132A (en) * | 2015-07-24 | 2015-12-23 | 河海大学 | Polyurethane foam supported liver/graphene/ titanium dioxide nano particle composite material, preparation method thereof and application thereof |
| CN109181325A (en) * | 2018-08-06 | 2019-01-11 | 南京林业大学 | A kind of preparation method of the compound antimicrobial aging agent of bituminous pavement |
| CN111359582A (en) * | 2020-03-23 | 2020-07-03 | 成都新柯力化工科技有限公司 | Graphene composite aerogel formaldehyde-removing material and preparation method thereof |
-
2020
- 2020-09-18 CN CN202010985316.6A patent/CN112063187A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4139511A (en) * | 1976-11-19 | 1979-02-13 | Nippon Oil Company, Ltd. | Asphalt compositions |
| CN101890344A (en) * | 2010-07-27 | 2010-11-24 | 华东理工大学 | Preparation method of graphene/titanium dioxide composite photocatalyst |
| CN104672481A (en) * | 2015-02-13 | 2015-06-03 | 复旦大学 | Metal-organic framework (MOF) modified graphene/polymer hybrid proton exchange membrane and preparation method thereof |
| CN105170132A (en) * | 2015-07-24 | 2015-12-23 | 河海大学 | Polyurethane foam supported liver/graphene/ titanium dioxide nano particle composite material, preparation method thereof and application thereof |
| CN109181325A (en) * | 2018-08-06 | 2019-01-11 | 南京林业大学 | A kind of preparation method of the compound antimicrobial aging agent of bituminous pavement |
| CN111359582A (en) * | 2020-03-23 | 2020-07-03 | 成都新柯力化工科技有限公司 | Graphene composite aerogel formaldehyde-removing material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114768545A (en) * | 2022-03-31 | 2022-07-22 | 青岛吉景新型材料有限公司 | Cellulose nitrate microporous membrane and continuous preparation method thereof |
| CN114768545B (en) * | 2022-03-31 | 2023-11-10 | 青岛吉景新型材料有限公司 | Nitrocellulose microporous membrane and continuous preparation method thereof |
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