Environment-friendly sunlight-resistant sand-containing fog seal and preparation method thereof

Abstract

The application discloses an environment-friendly sunlight-resistant sand-containing fog seal layer and a preparation method thereof. The environment-friendly sunlight-resistant sand-containing fog seal layer comprises the following components in mass parts: asphalt: 35-95 parts; water: 30-80 parts; composite emulsifier: 2-10 parts; defoaming agent: 0.5-3 parts; latex: 10-50 parts; suspending agent: 20-40 parts; fine sand particles: 20-45 parts; and environment-friendly sunlight-resistant microcapsules: 5-45 parts. The environment-friendly sunlight-resistant microcapsules comprise a shell material and a core material. The shell material is a composite shell material comprising titanium dioxide / nano-electric sapphire / polydopamine. The core material is a normal alkane with a phase transition temperature of 40 DEG C-60 DEG C. The surface of the shell material is loaded with a metal chelate and a light stabilizer. The environment-friendly sunlight-resistant sand-containing fog seal layer has good road performance, temperature control capability and ultraviolet resistance, and can inhibit the amount of pollutants generated by high-temperature sunlight on the asphalt pavement.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of special asphalt, and particularly relates to an environment-friendly sunlight-resistant sand-containing fog seal and a preparation method thereof. BACKGROUND

[0002] Asphalt pavement is the most common pavement form in China and even the whole world. However, the material constituting the asphalt pavement, i.e. asphalt mixture, will not only appear cracking, particle dropping and other problems, but also continuously release pollutants with irritating odor under the combined action of sunlight and high temperature in the long-term service, which finally greatly reduces the service time of the asphalt pavement and harms human health.

[0003] Sand-containing fog seal material is the most widely used pavement maintenance material at present. After being spread on the pavement, the material can re-soften the asphalt with poor adhesion and poor toughness of the surface layer, and repair the formed diseases, so as to prolong the service time of the pavement to a certain extent.

[0004] CN116285690A discloses a sand-containing fog seal material and a preparation method and application thereof. The method prepares a sand-containing fog seal material with high wear resistance and durability by controlling the types of high molecular emulsion, filler and emulsified asphalt. However, the prepared sand-containing fog seal material can only maintain the pavement after being spread on the pavement, and cannot solve the problem that the asphalt is easily aged and releases irritating gas under the action of sunlight and high temperature.

[0005] The sand-containing fog seal material produced by the prior art only considers repairing the diseases that have appeared on the pavement, and does not consider the problems of aging and smoke release of the pavement under the action of sunlight and high temperature after the pavement is maintained. Therefore, it is very necessary to develop a pavement maintenance material which can effectively maintain the pavement and reduce the aging degree and smoke release amount of the asphalt pavement under the action of sunlight and high temperature. SUMMARY

[0006] In view of the problems existing in the prior art, the present application provides an environment-friendly sunlight-resistant sand-containing fog seal and a preparation method thereof. The environment-friendly sunlight-resistant sand-containing fog seal has good road performance, temperature control ability and ultraviolet resistance, and can effectively inhibit the amount of pollutants generated by the asphalt pavement under the action of high temperature and sunlight, which provides a new idea for the functionalization of asphalt materials.

[0007] The present application provides an environment-friendly sunlight-resistant sand-containing fog seal, which comprises the following components in mass parts:

[0008] Asphalt: 35-95 parts;

[0009] Water: 30-80 parts;

[0010] Compound emulsifier: 2-10 parts;

[0011] Defoaming agent: 0.5-3 parts;

[0012] Latex: 10-50 parts;

[0013] Suspending agent: 20-40 parts;

[0014] Fine sand: 20-45 parts;

[0015] Environmentally friendly sunlight-resistant microcapsule: 5-45 parts;

[0016] The environmentally friendly sunlight-resistant microcapsule comprises a shell material and a core material, the shell material is a composite shell material comprising titanium dioxide / nano tourmaline / polydopamine, the core material is a n-alkane with a phase transition temperature of 40-60°C, and the shell material surface is loaded with metal chelate and light stabilizer.

[0017] Further, the asphalt is commercially available 70 or 90 base asphalt.

[0018] Further, the compound emulsifier comprises a cationic emulsifier and an amphoteric emulsifier. The mass ratio of the cationic emulsifier and the amphoteric emulsifier is 1:0.5-2.5.

[0019] Further, the cationic emulsifier comprises one or more of amine salt type surfactants with carbon number >8; preferably one or more of tetradecyl-dimethyl pyridine bromide, octadecanoic acid amide propyl dimethyl dihydroxy propyl ammonium chloride, behenic acid amide propyl dimethyl dihydroxy propyl ammonium chloride, hexadecanoic acid amide propyl trimethyl ammonium chloride, bis-octadecyl-methyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium chloride, octadecyl dimethyl hydroxy ethyl quaternary ammonium nitrate, hexadecyl trimethyl amine bromide, hexadecyl trimethyl ammonium chloride.

[0020] Further, the amphoteric emulsifier is a polyol type surfactant; preferably one or more of fatty acid glycol ester, monoglyceride, pentaerythritol fatty acid ester, sorbitan fatty acid ester, sucrose fatty acid ester.

[0021] Further, the defoaming agent is one or more of sunflower seed oil, polydimethylsiloxane, eicosanol, docosanol.

[0022] Further, the latex is one or more of natural latex, carboxyl styrene-butadiene latex, polyurethane latex, nitrile rubber latex, chlorobutyl latex.

[0023] Further, the suspending agent is one or more of bentonite, kaolin, carbon black, talc powder.

[0024] Further, the particle size of the suspending agent is 800-1800 mesh.

[0025] Further, the fine sand particles are one or more of quartz sand, corundum sand, or basalt sand.

[0026] Further, the particle size of the fine sand particles is 30-300 mesh; preferably, the mass percentage of sand particles greater than or equal to 30 mesh and less than 70 mesh is 50%-60%, the mass percentage of sand particles of 70-130 mesh is 20%-30%, and the mass percentage of sand particles greater than 130 mesh and less than or equal to 300 mesh is 10%-30%.

[0027] Further, the light stabilizer is selected from one or more of a benzophenone light stabilizer with a carbon atom number greater than 10 or a hindered amine light stabilizer with a carbon atom number greater than 15.

[0028] Further, the benzophenone light stabilizer with a carbon atom number greater than 10 is selected from one or more of BP-1 (2,4-dihydroxybenzophenone), BP-2 (2,2',4,4'-tetrahydroxybenzophenone), BP-3 (4-methoxy-2-hydroxybenzophenone), BP-4 (2-hydroxy-4-methoxy-5-sulfonic acid benzophenone), BP-8 (2,2'-hydroxy-4-methoxybenzophenone), and BP-12 (2-hydroxy-4-n-octyloxybenzophenone).

[0029] Further, the hindered amine light stabilizer with a carbon atom number greater than 15 is selected from one or more of HALS-770 (bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate), HALS-292 (bis(1,2,2,6,6-pentamethylpiperidinol) sebacate), HALS-3346 (poly[(6-morpholino-1,3,5-triazine-2,4-yl)-((2,2,6,6-tetramethyl-4-piperidyl)imino)hexane-((2,2,6,6-tetramethyl-4-piperidyl)imino)]), HALS-944 (poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidyl)imino]]), and HALS-112 (bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate).

[0030] Further, the particle size of the environmentally friendly sunlight-resistant microcapsule is 1-5 μm.

[0031] Further, the mass ratio of the shell material to the core material of the environmentally friendly sunlight-resistant microcapsule is 1:(0.5-2).

[0032] Further, the shell material of the modified slow-release odor-removing microcapsule is a composite shell material comprising titanium dioxide / nano-electricite / polydopamine, wherein the mass ratio of titanium dioxide / nano-electricite is (1-5):1, and the mass ratio of titanium dioxide / polydopamine is 1:(0.1-0.5).

[0033] Further, the shell material is loaded with a metal chelate, wherein the metal is preferably copper.

[0034] Further, the shell material is loaded with a metal chelate, and the loading amount of the metal accounts for 0.1wt%-15wt% of the total mass of the slow-release odor-removing microcapsule; the loading amount of the light stabilizer accounts for 0.1wt%-20wt% of the total mass of the odor-removing temperature-controlling microcapsule.

[0035] Further, the n-alkane with a phase transition temperature of 40℃-60℃ is preferably one or more of n-octadecane, n-eicosane, and n-docosane.

[0036] Further, the preparation method of the environmentally friendly sunlight-resistant microcapsule comprises the following steps:

[0037] S1: mixing nano-electricite, a surfactant, and a solvent, modifying under stirring, washing after modification, freeze-drying, and obtaining modified nano-electricite;

[0038] S2: heating the core material raw material for standby;

[0039] S3: adding a solvent and the modified nano-electricite obtained in step S1 to the system of step S2, and stirring and mixing;

[0040] S4: adding titanium dioxide precursor to the reaction system of step S3, stirring and mixing, and obtaining a Pickering emulsion;

[0041] S5: adjusting the pH value of the Pickering emulsion obtained in step S4 to 2-5, continuing to stir, then aging, filtering, and freeze-drying;

[0042] S6: adding the solid powder prepared in step S5 to a buffer solution, adding dopamine hydrochloride, stirring and treating, then filtering, washing, and freeze-drying;

[0043] S7: adding the solid powder prepared in step S6 and a light stabilizer to an organic solvent, adding a strong base, and then reacting under heating and refluxing conditions, cooling, filtering, washing, and freeze-drying;

[0044] S8: adding the solid powder prepared in step S7 to a metal salt ion-formamide solution, stirring and treating, after the reaction is completed, filtering, washing, and freeze-drying, to obtain the environmentally friendly sunlight-resistant microcapsule.

[0045] Further, in step S1, the diameter of the nanometer tourmaline is 10-100 nm.

[0046] Further, in step S1, the surfactant is a cationic surfactant, preferably one or more of dodecyl dimethyl benzyl ammonium chloride, hexadecyl trimethyl ammonium bromide, octadecyl trimethyl ammonium chloride.

[0047] Further, in step S1, the solvent is an aprotic solvent with boiling point > 100℃, preferably one or more of formamide, N,N-dimethylformamide, dimethylacetamide, dimethylphosphoryl amide, further preferably formamide.

[0048] Further, in step S1, the mass ratio of the nanometer tourmaline to the surfactant is (1-10):1, and the mass ratio of the solvent to the surfactant is (5-60):1.

[0049] Further, in step S1, the stirring speed is 400-600 rpm, the modification temperature is 100-200℃, and the modification time is 4-10 hours.

[0050] Further, in step S1, the freeze-drying condition is vacuum drying at a temperature of -40℃ to -20℃ for 4-8 hours.

[0051] Further, in step S2, the heating temperature of the core material raw material is 40-60℃.

[0052] Further, in step S3, the solvent is an aprotic solvent with boiling point > 100℃, preferably one or more of formamide, N,N-dimethylformamide, dimethylacetamide, dimethylphosphoryl amide, further preferably formamide.

[0053] Further, in step S3, the mass ratio of the core material raw material to the modified nanometer tourmaline is (1-20):1, and the mass ratio of the solvent to the modified nanometer tourmaline is (10-80):1.

[0054] Further, in step S3, the stirring speed is 400-600 rpm, the stirring temperature is 40-60℃, and the stirring time is 4-6 hours.

[0055] Further, in step S4, the titanium dioxide precursor is one or more of n-butyl titanate, tetra-n-propyl titanate, and tetraethyl titanate.

[0056] Further, in step S4, the mass ratio of the core material raw material to the titanium dioxide precursor is 1:(0.5-2).

[0057] Further, in step S4, the stirring speed is 400-600 rpm, the stirring temperature is 40-60°C, and the stirring time is 4-6 hours.

[0058] Further, in step S5, the pH adjustment can be performed using dilute acid, such as dilute hydrochloric acid. The stirring speed is 400-600 rpm, the stirring temperature is 40-60°C, and the stirring time is 4-6 hours.

[0059] Further, in step S5, the aging condition is 40-60°C for 12-30 hours. The freeze-drying condition is vacuum drying at -40°C to -20°C for 4-8 hours.

[0060] Further, in step S6, the buffer is one or more of phosphate buffer, carbonate buffer, and Tris buffer, and is preferably Tris buffer.

[0061] Further, in step S6, the pH value of the buffer is 8-10.

[0062] Further, in step S6, the mass ratio of the buffer to the solid powder prepared in step S5 is (30-200):1.

[0063] Further, in step S6, after the addition of dopamine hydrochloride, the mass concentration of dopamine in the reaction system is 2-10 mg / mL.

[0064] Further, in step S6, the stirring speed is 100-300 rpm, the stirring temperature is 20-30°C, and the stirring time is 12-24 hours.

[0065] Further, in step S6, the freeze-drying condition is vacuum drying at -40°C to -20°C for 4-8 hours.

[0066] Further, in step S7, the strong base is one of solid KOH and solid NaOH, and is preferably solid KOH.

[0067] Further, in step S7, the organic solvent is one or more of methanol, butanediol, ethylene glycol, n-butanol, and anhydrous ethanol.

[0068] Further, in step S7, the reaction temperature is 80-240°C, and the reaction time is 5-10 hours.

[0069] Further, in step S7, the mass ratio of the solid powder to the organic solvent is 1:(20-100), the mass ratio of the solid powder to the light stabilizer is 1:(20-80), and the mass ratio of the solid powder to the strong base is 1:(0.5-4).

[0070] Further, in step S7, the freeze-drying condition is vacuum drying at a temperature of -40℃ to -20℃ for 4-8 hours.

[0071] Further, in step S8, the metal ion salt is preferably a copper ion salt, and further preferably anhydrous copper sulfate.

[0072] Further, in step S8, the mass ratio of the metal ion salt to the formamide in the metal ion salt-formamide solution is (0.5-1.5):1.

[0073] Further, in step S8, the mass ratio of the metal ion salt-formamide solution to the solid powder prepared in step S7 is (10-100):1.

[0074] Further, in step S8, the stirring speed is 200-450 rpm, the stirring temperature is 100-190℃, and the stirring time is 2-5 hours.

[0075] Further, in step S8, the freeze-drying condition is vacuum drying at a temperature of -40℃ to -20℃ for 4-8 hours.

[0076] The second aspect of the present application provides a preparation method of the above-mentioned environmentally friendly sunlight-resistant sand-containing fog seal layer, comprising the following steps:

[0077] P1: preparing a composite emulsifier;

[0078] P2: stirring and mixing water and part of the composite emulsifier prepared in step P1, adjusting the pH value to obtain a soap solution;

[0079] P3: heating the asphalt and the soap solution obtained in step P2 respectively, then shearing to prepare an emulsified asphalt;

[0080] P4: adding the remaining part of the composite emulsifier prepared in step P1 to the emulsified asphalt obtained in step P3, and stirring and mixing;

[0081] P5: adding a defoaming agent to the reaction system of step P4, and stirring and mixing;

[0082] P6: adding a suspending agent to the reaction system of step P5, and stirring and mixing;

[0083] P7: adding an environmentally friendly sunlight-resistant microcapsule to the reaction system of step P6, and stirring and mixing;

[0084] P8: adding the compound latex prepared in step P3 into the reaction system of step P7, and stirring and mixing;

[0085] P9: adding fine sand into the reaction system of step P8, and stirring and mixing to obtain the environment-friendly sunlight-resistant sand-containing fog seal.

[0086] Further, in step P1, the preparation of the compound emulsifier can be achieved by uniformly mixing the cationic emulsifier and the amphoteric emulsifier.

[0087] Further, in step P2, the water is preferably deionized. The mass ratio of the water to the compound emulsifier is (5-20):1.

[0088] Further, in step P2, the stirring speed is 100-600 rpm, the stirring temperature is 50-90°C, and the stirring time is 5-20 minutes.

[0089] Further, in step P2, the pH adjustment can be achieved by using an acetic acid aqueous solution, and the pH value is adjusted to 2-4.

[0090] Further, in step P3, the heating temperature of the asphalt is 113-183°C, and the heating temperature of the soap solution is 30-60°C.

[0091] Further, in step P3, the shearing is preferably multiple cycles of shearing, and further preferably 3-5 cycles of shearing. The shearing rate is 3000-5000 rpm, and the shearing time is 2-20 minutes.

[0092] Further, in step P4, the mass ratio of the compound emulsifier added to the compound emulsifier added in step P2 is 1:2-5.

[0093] Further, in step P4, the stirring speed is 100-600 rpm, the stirring temperature is 30-90°C, and the stirring time is 2-20 minutes.

[0094] Further, in step P5, the stirring speed is 100-600 rpm, the stirring temperature is 30-90°C, and the stirring time is 2-20 minutes.

[0095] Further, in step P6, the suspending agent is preferably added in multiple times, and further preferably divided into 3-5 times of addition.

[0096] Further, in step P6, the stirring speed is 700-1600 rpm, the stirring temperature is 30-90°C, and the stirring time is 10-50 minutes.

[0097] Further, in step P7, the stirring speed is 300-500 rpm, the stirring temperature is 30-90 DEG C, and the stirring time is 10-50 minutes.

[0098] Further, in step P8, the stirring speed is 300-500 rpm, the stirring temperature is 30-90 DEG C, and the stirring time is 10-50 minutes.

[0099] Further, in step P9, the stirring speed is 100-600 rpm, the stirring temperature is 40-90 DEG C, and the stirring time is 2-20 minutes.

[0100] Compared with the prior art, the present application has the following advantages:

[0101] (1) The environmental protection sunlight-resistant microcapsule has a triple effect of the nanotourmaline in the composite shell material, the first effect is that the nanotourmaline acts as a template agent for microcapsule synthesis to maintain the stability of the precursor emulsion during preparation, the second effect is that a large amount of metal ions are adsorbed to the surface of the microcapsule by the negative ion field released by the nanotourmaline during the modification of the metal ions in the microcapsule composite shell material, thereby effectively improving the loading capacity of the metal ions in the microcapsule shell material and further improving the inhibitory capacity of the environmental protection sunlight-resistant microcapsule, and the third effect is that the nanotourmaline contained in the shell material releases a negative ion field during the service of the asphalt pavement, thereby further attracting the compounds released by the asphalt pavement under the action of high temperature to the surrounding of the environmental protection sunlight-resistant microcapsule, improving the difficulty of volatilization of these compounds, and enabling the metal ions on the surface of the microcapsule to react with more of the above-mentioned compounds, thereby further inhibiting the volatilization of these compounds and effectively reducing the impact of the irritating gas released by the asphalt pavement on the human body.

[0102] (2) The environmental protection sunlight-resistant microcapsule has a titanium dioxide shell material that can shield ultraviolet rays, and a polydopamine shell material that has a large number of active groups such as quinone groups and phenolic hydroxyl groups, thereby having good ultraviolet resistance. After the environmental protection sunlight-resistant sand fog seal layer is applied to the road surface, the composite shell material of the environmental protection sunlight-resistant microcapsule contained therein can synergistically exhibit good ultraviolet resistance, thereby effectively reducing the degree of ultraviolet aging of the asphalt pavement during service.

[0103] (3) The environmental protection sunlight-resistant microcapsule has a large number of active groups on the surface of the polydopamine shell layer, and the light stabilizer is immobilized on the surface of the microcapsule by Schiff base reaction and Michael addition reaction. After immobilization, the stability of the light stabilizer is greatly improved, thereby effectively avoiding the loss of the light stabilizer due to heating, and the environmental protection sunlight-resistant microcapsule has persistent and efficient ultraviolet resistance.

[0104] (4) The light-stable microcapsule of the present application has a shell material surface immobilized with a light stabilizer, which can not only effectively absorb ultraviolet light with a wavelength of 290-410 nm, but also capture active free radicals generated by the asphalt pavement under the action of ultraviolet light, thereby inhibiting the ultraviolet aging of the asphalt and reducing the generation of small molecule compounds in the asphalt system, prolonging the service life of the asphalt and reducing the impact of gas released by the asphalt pavement on the environment.

[0105] (5) The environmentally friendly sunlight-resistant sand-containing fog seal of the present application can effectively reduce the temperature of the asphalt pavement when the core material of the environmentally friendly sunlight-resistant microcapsule contained therein undergoes a phase change to absorb heat when the temperature of the asphalt pavement rises, thereby not only reducing the amount of small molecule compounds released by the asphalt pavement, but also effectively reducing the diseases caused by high temperature of the asphalt pavement, thereby prolonging the service life of the asphalt pavement.

[0106] (6) The environmentally friendly sunlight-resistant microcapsule of the present application has an organic-inorganic multi-layer composite shell material, which has high strength and is not prone to breakage, thereby having a long service life.

[0107] (7) The environmentally friendly sunlight-resistant sand-containing fog seal of the present application can effectively reduce the amount of malodorous gas released by the asphalt under the action of sunlight at high temperature, thereby avoiding the discomfort caused by the asphalt pavement to the human body.

[0108] (8) The environmentally friendly sunlight-resistant sand-containing fog seal of the present application has excellent embedding effect on the road surface, thereby effectively prolonging the service life of the road surface. BRIEF DESCRIPTION OF DRAWINGS

[0109] Figure 1 is the electron microscope image of the environmentally friendly sunlight-resistant microcapsule obtained in Example 1 of the present application. DETAILED DESCRIPTION

[0110] To further illustrate the technical solutions of the present application, the present application will be described in detail below in conjunction with examples. It should be noted that the morphology test of the present application is performed by scanning electron microscopy with an acceleration voltage of 20 kV. Since the microcapsule wall material is not conductive, the sample needs to be treated by gold spraying before testing.

[0111] The smoke suppression effect of the environmentally friendly sunlight-resistant sand-containing fog seal of the present application is tested by gas chromatography, and the test items are non-methane total hydrocarbon and sulfide.

[0112] Example 1

[0113] Preparation of the environmentally friendly sunlight-resistant microcapsule:

[0114] S1: adding tourmaline with a diameter of 70 nm, cetyltrimethylammonium bromide and formamide into a first container in a mass ratio of 3:1:50, stirring the reaction at 500 rpm and 190°C for 6 hours to modify the surface of the nanometer tourmaline, washing with ethanol multiple times after the reaction is completed, vacuum drying at a temperature of -30°C for 5 hours to obtain modified nanometer tourmaline for standby use;

[0115] S2: adding 5 parts by mass of n-docosane into a second container, heating to melt at a temperature of 50°C for standby use;

[0116] S3: adding formamide at 50°C and the modified nanometer tourmaline obtained in step S1 into the above system, stirring at 500 rpm and 50°C for 5 hours, the mass ratio of n-docosane, modified nanometer tourmaline and formamide being 5:3:50;

[0117] S4: adding 5 parts by mass of tetraethyl titanate into the system of step S3, keeping the rotation speed at 500 rpm and the temperature at 50°C, continuing to stir for 4 hours to obtain a Pickering emulsion;

[0118] S5: keeping the rotation speed at 500 rpm and the temperature at 50°C, slowly adding 10 wt% dilute hydrochloric acid into the system of step S4 using a peristaltic pump until the pH of the reaction system is 5, continuing to stir for 5 hours and then stopping stirring, keeping the temperature unchanged for aging for 24 hours, then filtering and washing the solid powder in the reaction system, and vacuum drying at a temperature of -30°C for 5 hours to obtain an environmentally friendly sunlight-resistant microcapsule precursor;

[0119] S6: adding 10 parts by mass of the environmentally friendly sunlight-resistant microcapsule precursor into 120 parts by mass of Tris buffer solution with a pH of 8.5, the mass ratio of the Tris buffer solution to the solid powder being 80:1, then adding dopamine hydrochloride to make the concentration of dopamine in the reaction system 5 mg / mL, stirring at 200 rpm and 25°C for 12 hours, then stopping stirring, filtering and washing the solid powder at the bottom, and vacuum drying at a temperature of -30°C for 5 hours;

[0120] S7: adding the solid powder prepared in step S6 and the same mass ratio of light stabilizers: BP-1, BP-12 and HALS-112 into ethanol, further adding solid KOH, the mass ratio of the solid powder prepared in step S6, light stabilizers, methanol and solid KOH being 1:70:70:3, refluxing the reaction at 90°C for 10 hours, then filtering and washing the solid powder at the bottom, and vacuum drying at a temperature of -30°C for 5 hours;

[0121] S8: ultrasonic dispersion of the solid powder prepared in step S7 in 50 wt% anhydrous copper sulfate-formamide solution, the mass ratio of solid powder to anhydrous copper sulfate-formamide solution is 1:70, stirring reaction at 400 rpm, 140℃ for 2 hours, after the reaction is completed, the bottom layer of solid powder is filtered and washed, and vacuum dried at a temperature of-30℃ for 5 hours to obtain the environment-friendly sunlight-resistant microcapsule, and the electron microscope image is as follows Figure 1 .

[0122] The preparation method of the environment-friendly sunlight-resistant sand-containing fog seal layer is as follows:

[0123] P1: adding 2 parts by mass of cetyltrimethylammonium chloride and 4 parts by mass of pentaerythritol fatty acid ester into a first container, stirring uniformly to obtain a composite emulsifier;

[0124] P2: adding 55 parts by mass of deionized water and 5 parts by mass of the composite emulsifier prepared in step P1 into a second container, stirring and mixing at 60℃ and 400 rpm for 20 minutes, then adjusting the pH to 3 using an acetic acid aqueous solution to obtain a soap solution;

[0125] P3: adding 60 parts by mass of 70# grade A asphalt heated to 163℃ and the soap solution prepared in step P2 heated to 60℃ into a colloid mill, shearing at 4000 rpm for 5 min, and circulating shearing 3 times to prepare an emulsified asphalt;

[0126] P4: adding 1 part by mass of the composite emulsifier prepared in step P2 to the emulsified asphalt obtained in step P4, stirring and mixing at 400 rpm and 60℃ for 20 minutes;

[0127] P5: adding 2 parts by mass of polydimethylsiloxane to the reaction system of step P4, stirring and mixing at 400 rpm and 60℃ for 20 minutes;

[0128] P6: slowly adding 30 parts by mass of 1200 mesh kaolin to the reaction system of step P5 in 5 times, stirring and mixing at 1500 rpm and 60℃ for 40 minutes;

[0129] P7: adding 40 parts by mass of the environment-friendly sunlight-resistant microcapsule to the system of step P6, stirring and mixing at 500 rpm and 60℃ for 50 minutes;

[0130] P8: adding 13 parts by mass of carboxyl styrene-butadiene latex and 17 parts by mass of chlorobutadiene latex to the system of step P7, stirring and mixing at 500 rpm and 60℃ for 40 minutes;

[0131] P9: 30 parts by mass of quartz sand was added to the system of step P8, wherein the mass ratio of 30-70 mesh sand particles was 55%, the mass ratio of 70-130 mesh sand particles was 25%, and the mass ratio of 130-300 mesh sand particles was 20%. After stirring and mixing at 600 rpm and 60°C for 20 minutes, an environmentally friendly sunlight-resistant sand-containing fog seal was obtained.

[0132] Example 2

[0133] In step S7, the light stabilizer was BP-2, BP-3, and HALS-3346 in equal mass ratio, and the rest was the same as in Example 1.

[0134] Example 3

[0135] In step S7, the mass ratio of the solid powder prepared in S6, the light stabilizer, methanol, and KOH was 1:65:70:3, and the rest was the same as in Example 1.

[0136] Example 4

[0137] In step P8, 13 parts by mass of natural latex and 17 parts by mass of butyronitrile latex were added, and the rest was the same as in Example 1.

[0138] Example 5

[0139] In step P7, the amount of environmentally friendly sunlight-resistant microcapsules used was 35 parts by mass, and the rest was the same as in Example 1.

[0140] Example 6

[0141] In step P8, 6 parts by mass of carboxylated styrene-butadiene latex and 8 parts by mass of chlorobutyl latex were added, and the rest was the same as in Example 1.

[0142] Example 7

[0143] In step S3, the mass ratio of n-docosane, modified nanoelectric tourmaline, and formamide was 4:3:50, and the rest was the same as in Example 1.

[0144] Example 8

[0145] In step S8, the mass ratio of solid powder to anhydrous copper sulfate-formamide solution was 1:55, and the rest was the same as in Example 1.

[0146] Comparative Example 1

[0147] Preparation of environmentally friendly sunlight-resistant microcapsules:

[0148] Steps S1-S7 are the same as in Example 1, except that step S8 is omitted.

[0149] The preparation method of the environmentally friendly sunlight-resistant sand-containing fog seal is as follows:

[0150] P1: add 2 parts by mass of cetyltrimethylammonium chloride and 4 parts by mass of pentaerythritol fatty acid ester to a first container, and stir to obtain a composite emulsifier;

[0151] P2: add 55 parts by mass of deionized water and 5 parts by mass of the composite emulsifier prepared in step P1 to a second container, and stir at 60°C and 400 rpm for 20 minutes, then adjust the pH to 3 using an aqueous acetic acid solution to obtain a soap solution;

[0152] P3: add 60 parts by mass of No. 70 A-grade asphalt heated to 163°C and the soap solution prepared in step P2 heated to 60°C to a colloid mill, shear at 4000 rpm for 5 minutes, and circulate for 3 times to obtain an emulsified asphalt;

[0153] P4: add 1 part by mass of the composite emulsifier prepared in step P2 to the emulsified asphalt obtained in step P3, and stir at 400 rpm and 60°C for 20 minutes;

[0154] P5: add 2 parts by mass of polydimethylsiloxane to the reaction system of step P4, and stir at 400 rpm and 60°C for 20 minutes;

[0155] P6: slowly add 30 parts by mass of 1200-mesh kaolin to the reaction system of step P5 in 5 portions, and stir at 1500 rpm and 60°C for 40 minutes;

[0156] P7: add 40 parts by mass of the solid powder prepared in step S7 to the system of step P6, and stir at 500 rpm and 60°C for 50 minutes;

[0157] P8: add 13 parts by mass of carboxylated styrene-butadiene latex and 17 parts by mass of chloroprene latex to the system of step P7, and stir at 500 rpm and 60°C for 40 minutes;

[0158] P9: add 30 parts by mass of quartz sand, wherein the mass ratio of 30-70 mesh sand particles is 55%, the mass ratio of 70-130 mesh sand particles is 25%, and the mass ratio of 130-300 mesh sand particles is 20%, to the system of step P8, and stir at 600 rpm and 60°C for 20 minutes to obtain an environmentally friendly sunlight-resistant sand-containing fog seal.

[0159] Comparative Example 2

[0160] Preparation of environmentally friendly sunlight-resistant microcapsules:

[0161] S1: add 5 parts by mass of n-docosane to a container, and heat to melt at a temperature of 50°C for standby;

[0162] S2: adding formamide and cetyltrimethylammonium bromide at 50°C to the system above, stirring at 500 rpm for 5 hours at 50°C, the mass ratio of n-dodecane, cetyltrimethylammonium bromide and formamide being 5:3:50;

[0163] S3: adding 5 parts by mass of tetraethyl titanate to the system of step S2, keeping the stirring speed at 500 rpm and the temperature at 50°C, and continuing to stir for 4 hours to obtain a Pickering emulsion;

[0164] S4: keeping the stirring speed at 500 rpm and the temperature at 50°C, slowly adding 10 wt% dilute hydrochloric acid to the system of step S3 using a peristaltic pump until the pH of the reaction system is 5, continuing to stir for 5 hours, then stopping stirring, keeping the temperature unchanged, and aging for 24 hours, then filtering and washing the solid powder in the reaction system, and vacuum drying at -30°C for 5 hours to obtain an environmentally friendly sunlight-resistant microcapsule precursor;

[0165] S5: adding 10 parts by mass of the environmentally friendly sunlight-resistant microcapsule precursor to 120 parts by mass of a Tris buffer solution with pH = 8.5, the mass ratio of the Tris buffer solution to the solid powder being 80:1, then adding dopamine hydrochloride to make the concentration of dopamine in the reaction system 5 mg / mL, stirring at 200 rpm at 25°C for 12 hours, then stopping stirring, filtering and washing the solid powder at the bottom, and vacuum drying at -30°C for 5 hours;

[0166] S6: adding the solid powder prepared in step S5 and the same mass ratio of light stabilizers: BP-1, BP-12, and HALS-112 to ethanol, further adding KOH, the mass ratio of the solid powder prepared in step S5, the light stabilizers, methanol, and KOH being 1:70:70:3, refluxing at 90°C for 10 hours, then filtering and washing the solid powder at the bottom, and vacuum drying at -30°C for 5 hours;

[0167] S7: ultrasonic dispersion of the solid powder prepared in step S6 in a 50 wt% anhydrous copper sulfate-formamide solution, the mass ratio of the solid powder to the anhydrous copper sulfate-formamide solution being 1:70, stirring at 400 rpm at 140°C for 2 hours, then filtering and washing the solid powder at the bottom, and vacuum drying at -30°C for 5 hours to obtain an environmentally friendly sunlight-resistant microcapsule;

[0168] The preparation method of the environmentally friendly sunlight-resistant sand-containing fog seal layer is the same as in Example 1.

[0169] Comparative Example 3

[0170] Preparation of environmentally friendly sunlight-resistant microcapsules

[0171] Steps S1-S6 are the same as in Example 1.

[0172] S7: The solid powder prepared in step S6 is ultrasonically dispersed in a 50 wt% anhydrous copper sulfate-formamide solution, the mass ratio of the solid powder to the anhydrous copper sulfate-formamide solution is 1:70, and the reaction is stirred at 400 rpm and 140°C for 2 hours. After the reaction is completed, the bottom layer of the solid powder is filtered, washed, and vacuum dried at a temperature of -30°C for 5 hours to obtain environmentally friendly sunlight-resistant microcapsules.

[0173] The preparation method of the environmentally friendly sunlight-resistant sand-containing fog seal is the same as in Example 1.

[0174] Comparative Example 4

[0175] P1: 2 parts by mass of hexadecyltrimethylammonium chloride and 4 parts by mass of pentaerythritol fatty acid ester are added to a first container and stirred uniformly to obtain a composite emulsifier;

[0176] P2: 55 parts by mass of deionized water and 5 parts by mass of the composite emulsifier prepared in step P1 are added to a second container, and after stirring and mixing at 60°C and 400 rpm for 20 minutes, an aqueous acetic acid solution is used to adjust the pH to 3 to obtain a soap solution;

[0177] P3: 60 parts by mass of No. 70 A-grade asphalt heated to 163°C and the soap solution prepared in step P2 heated to 60°C are added to a colloid mill, sheared at a speed of 4000 rpm for 5 minutes, and circulated for 3 times to prepare an emulsified asphalt;

[0178] P4: 1 part by mass of the composite emulsifier prepared in step P2 is added to the emulsified asphalt obtained in step P3, and stirred and mixed at 400 rpm and 60°C for 20 minutes;

[0179] P5: 2 parts by mass of polydimethylsiloxane is added to the reaction system of step P4, and stirred and mixed at 400 rpm and 60°C for 20 minutes;

[0180] P6: 30 parts by mass of 1200-mesh kaolin is slowly added to the reaction system of step P5 in 5 portions, and stirred and mixed at 1500 rpm and 60°C for 40 minutes;

[0181] P7: 13 parts by mass of carboxylated styrene-butadiene latex and 17 parts by mass of chloroprene latex are added to the system of step P6, and stirred and mixed at 500 rpm and 60°C for 40 minutes;

[0182] P8: adding 30 parts by mass of quartz sand into the system of step P7, wherein the mass ratio of 30-70 mesh sand particles is 55%, the mass ratio of 70-130 mesh sand particles is 25%, and the mass ratio of 130-300 mesh sand particles is 20%, and then stirring and mixing at 600 rpm and 60°C for 20 minutes to obtain the environmentally friendly sunlight-resistant sand-containing fog seal.

[0183] Comparative Example 5

[0184] Preparation of environmentally friendly sunlight-resistant microcapsules:

[0185] Steps S1-S5 are the same as in Example 1, except that steps S6-S8 are omitted.

[0186] The preparation method of the environmentally friendly sunlight-resistant sand-containing fog seal is as follows:

[0187] P1: adding 2 parts by mass of hexadecyltrimethylammonium chloride and 4 parts by mass of pentaerythritol fatty acid ester into a first container, and stirring uniformly to obtain a composite emulsifier;

[0188] P2: adding 55 parts by mass of deionized water and 5 parts by mass of the composite emulsifier prepared in step P1 into a second container, and stirring and mixing at 60°C and 400 rpm for 20 minutes, then adjusting the pH to 3 using an aqueous acetic acid solution to obtain a soap solution;

[0189] P3: adding 60 parts by mass of No. 70 A-grade asphalt heated to 163°C and the soap solution prepared in step P2 heated to 60°C into a colloid mill, shearing at 4000 rpm for 5 minutes, and circulating shearing 3 times to prepare an emulsified asphalt;

[0190] P4: adding 1 part by mass of the composite emulsifier prepared in step P2 into the emulsified asphalt obtained in step P3, and stirring and mixing at 400 rpm and 60°C for 20 minutes;

[0191] P5: adding 2 parts by mass of polydimethylsiloxane into the reaction system of step P4, and stirring and mixing at 400 rpm and 60°C for 20 minutes;

[0192] P6: slowly adding 30 parts by mass of 1200 mesh kaolin into the reaction system of step P5 in 5 portions, and stirring and mixing at 1500 rpm and 60°C for 40 minutes;

[0193] P7: adding 40 parts by mass of the environmentally friendly sunlight-resistant microcapsule precursor prepared in step S5 into the system of step P6, and stirring and mixing at 500 rpm and 60°C for 50 minutes;

[0194] P8: 13 parts by mass of carboxylated styrene-butadiene latex and 17 parts by mass of chloroprene latex were added to the system of step P7, and stirred and mixed at 500 rpm and 60°C for 40 minutes;

[0195] P9: 30 parts by mass of quartz sand were added to the system of step P8, wherein the mass ratio of 30-70 mesh sand particles was 55%, the mass ratio of 70-130 mesh sand particles was 25%, and the mass ratio of 130-300 mesh sand particles was 20%. After stirring and mixing at 600 rpm and 60°C for 20 minutes, an environmentally friendly sunlight-resistant sand-containing fog seal was obtained.

[0196] Comparative Example 6

[0197] The preparation of the environmentally friendly sunlight-resistant microcapsules was the same as in Example 1.

[0198] The preparation method of the environmentally friendly sunlight-resistant sand-containing fog seal was as follows:

[0199] P1: 2 parts by mass of cetyltrimethylammonium chloride and 4 parts by mass of pentaerythritol fatty acid ester were added to a first container and stirred uniformly to obtain a composite emulsifier;

[0200] P2: 55 parts by mass of deionized water and 5 parts by mass of the composite emulsifier prepared in step P1 were added to a second container. After stirring and mixing at 60°C and 400 rpm for 20 minutes, a soap solution was obtained by adjusting the pH to 3 using an aqueous acetic acid solution;

[0201] P3: 60 parts by mass of No. 70 A-grade asphalt heated to 163°C and the soap solution prepared in step P2 heated to 60°C were added to a colloid mill, sheared at a speed of 4000 rpm for 5 minutes, and circulated for 3 times to prepare an emulsified asphalt;

[0202] P4: 1 part by mass of the composite emulsifier prepared in step P2 was added to the emulsified asphalt obtained in step P3, and stirred and mixed at 400 rpm and 60°C for 20 minutes;

[0203] P5: 2 parts by mass of polydimethylsiloxane were added to the reaction system of step P4, and stirred and mixed at 400 rpm and 60°C for 20 minutes;

[0204] P6: 30 parts by mass of 1200 mesh kaolin were slowly added to the reaction system of step P5 in 5 portions, and stirred and mixed at 1500 rpm and 60°C for 40 minutes;

[0205] P7: 40 parts by mass of environmentally friendly sunlight-resistant microcapsules were added to the system of step P6, and stirred and mixed at 500 rpm and 60°C for 50 minutes;

[0206] P8: 30 parts by mass of quartz sand is added to the system of step P7, wherein the mass ratio of 30-70 mesh sand particles is 55%, the mass ratio of 70-130 mesh sand particles is 25%, and the mass ratio of 130-300 mesh sand particles is 20%, and after stirring and mixing at 600 rpm and 60°C for 20 minutes, an environmentally-friendly sunlight-resistant sand-containing fog seal is obtained.

[0207] Test Example 1

[0208] The prepared environmentally-friendly sunlight-resistant sand-containing fog seal paint wheel abrasion and adhesion strength to the base surface were tested, and the obtained data are shown in Table 1 below.

[0209] Table 1 Performance test of environmentally-friendly sunlight-resistant sand-containing fog seal

[0210] Sample Wet roller abrasion value is / g·m -2 ]] Tensile strength at 25°C / MPa Example 1 28.3 2.42 Example 2 28.6 2.40 Example 3 30.0 2.28 Example 4 28.9 2.37 Example 5 30.6 2.24 Example 6 31.7 2.16 Example 7 29.7 2.30 Example 8 29.4 2.33 Comparative Example 1 32.0 2.14 Comparative Example 2 32.5 2.10 Comparative Example 3 34.0 2.02 Comparative Example 4 35.4 1.94 Comparative Example 5 36.8 1.86 Comparative Example 6 67.4 1.33

[0211] Test Example 2

[0212] The gas released by the asphalt pavement under the influence of high temperature is mainly volatile organic compounds and sulfides. In order to verify the repellent ability of the insect-repellent environmentally-friendly sand-containing fog seal to asphalt materials, the samples prepared in the examples and comparative examples are scattered on the surface of the asphalt mixture test block, the size of the asphalt mixture test block is 10 cm*10 cm*3 cm, and the sample is further moved into a closed container with a gas inlet, and stored at a temperature of 100°C, the storage time is 1 day, after the storage is completed, the gas in the closed container is sucked, the content of VOCs and H2S in the gas is tested by gas chromatography, and the obtained data are shown in Table 2.

[0213] Table 2 Asphalt fume test data

[0214]

[0215]

[0216] Test Example 3

[0217] The ultraviolet aging test is carried out in an ultraviolet aging box, the ultraviolet intensity is 1200 μW / cm 2 , the aging temperature is 60°C, and the aging time is 20 days. The environmentally-friendly sunlight-resistant fog seal prepared in the examples and comparative examples is scattered on the surface of the rutting plate, and the dynamic stability of the obtained sample after aging is tested. The obtained data are shown in Table 3.

[0218] Table 3 Asphalt mixture dynamic stability test

[0219]

[0220]

[0221] The specific embodiments of the present application are described above in detail, but the present application is not limited to this. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, including that various technical features are combined in any other suitable manner. These simple modifications and combinations should also be considered as disclosed by the present application and belong to the protection scope of the present application.

Claims

1. An environmentally friendly, sun-resistant, sand-containing fog sealant, characterized in that: The environmentally friendly, sun-resistant, sand-containing fog sealant comprises, by weight, the following components: Asphalt: 35-95 parts; Water: 30-80 parts; Compound emulsifier: 2-10 parts; Defoamer: 0.5-3 parts; Latex: 10-50 parts; Suspension agent: 20-40 parts; Fine sand: 20-45 parts; Environmentally friendly, sunlight-resistant microcapsules: 5-45 parts; The environmentally friendly, sunlight-resistant microcapsule comprises a shell material and a core material. The shell material is a composite shell material comprising titanium dioxide / nano tourmaline / polydopamine, and the core material is a n-alkane with a phase change temperature of 40℃-60℃. The surface of the shell material is loaded with metal chelates and light stabilizers. The shell material of the environmentally friendly, sunlight-resistant microcapsule is a composite shell material comprising titanium dioxide / nano-tourmaline / polydopamine, wherein the mass ratio of titanium dioxide to / nano-tourmaline is 1-5:1, and the mass ratio of titanium dioxide to polydopamine is 1:0.1-0.

5. The shell material surface is loaded with a metal chelate, wherein the metal is copper; the metal loading amount accounts for 0.1wt%-15wt% of the total mass of the sustained-release deodorizing microcapsules; the light stabilizer loading amount accounts for 0.1wt%-20wt% of the total mass of the deodorizing and temperature-controlled microcapsules. The preparation method of the environmentally friendly, sunlight-resistant microcapsules includes the following steps: S1: Nano tourmaline, surfactant and solvent are mixed and modified under stirring. After modification, the mixture is washed and freeze-dried to obtain modified nano tourmaline. S2: Heat the core material raw material for later use; S3: Add solvent and modified nano-tourmaline obtained in step S1 to the system of step S2, and stir to mix; S4: Add titanium dioxide precursor to the reaction system of step S3, stir and mix to obtain Pickering emulsion; S5: Adjust the pH of the Pickering emulsion obtained in step S4 to 2-5, continue stirring, then age, filter, and freeze-dry; S6: Add the solid powder obtained in step S5 to the buffer solution, add dopamine hydrochloride, stir and process, then filter, wash and freeze dry; S7: Add the solid powder obtained in step S6 and the light stabilizer to an organic solvent, add a strong base, and react under reflux conditions. After cooling, filter, wash, and freeze-dry. S8: Add the solid powder obtained in step S7 to the metal ion salt-formamide solution, stir and process. After the reaction is complete, filter, wash and freeze dry to obtain environmentally friendly sunlight-resistant microcapsules. The metal ion salt is a copper ion salt.

2. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: The composite emulsifier includes a cationic emulsifier and an amphoteric emulsifier; the mass ratio of the cationic emulsifier to the amphoteric emulsifier is 1:0.5-2.

5.

3. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 2, characterized in that: The cationic emulsifier includes one or more amine salt surfactants with more than 8 carbon atoms; the amphoteric emulsifier is a polyol surfactant.

4. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 3, characterized in that: The cationic emulsifier is one or more of tetradecyl-dimethylpyridine ammonium bromide, octadecanoic acid-ammonium-dimethyl-dihydroxypropyl ammonium chloride, docosanoic acid-ammonium-dimethyl-dihydroxypropyl ammonium chloride, hexadecanoic acid-ammonium-dimethyl-dimethyl ammonium chloride, dioctadecyl-methyl-benzyl ammonium chloride, dodecyl-dimethyl-benzyl ammonium chloride, octadecyl-dimethyl-hydroxyethyl quaternary ammonium nitrate, hexadecyl-trimethylammonium bromide, and hexadecyl-trimethylammonium chloride; the amphoteric emulsifier is one or more of fatty acid glycol esters, mono-fatty acid glycerides, pentaerythritol fatty acid esters, sorbitan fatty acid esters, and sucrose fatty acid esters.

5. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: The defoamer is one or more of sunflower seed oil, polydimethylsiloxane, eicosanol, and docosanol. And / or, the latex is one or more of natural latex, carboxylated styrene-butadiene latex, polyurethane latex, nitrile latex, and chloroprene latex; And / or, the suspending agent is one or more of bentonite, kaolin, carbon black, and talc; And / or, the fine sand particles are one or more of quartz sand, corundum, alumina sand or basalt sand.

6. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: The light stabilizer is selected from one or more of benzophenone-based light stabilizers with more than 10 carbon atoms or hindered amine-based light stabilizers with more than 15 carbon atoms.

7. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 6, characterized in that: The benzophenone-based light stabilizers with more than 10 carbon atoms are selected from one or more of BP-1 (2,4-dihydroxybenzophenone), BP-2 (2,2',4,4'-tetrahydroxybenzophenone), BP-3 (4-methoxy-2-hydroxybenzophenone), BP-4 (2-hydroxy-4-methoxy-5-sulfonic acid benzophenone), BP-8 (2,2'-hydroxy-4-methoxybenzophenone), and BP-12 (2-hydroxy-4-n-octyloxybenzophenone); the hindered amine-based light stabilizers with more than 15 carbon atoms are selected from HALS-770 (bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate), HALS-292 (bis(1,2,2,6,6-pentamethylpiperidinyl) sebacate), and HALS-292 (bis(1,2,2,6,6-pentamethylpiperidinyl) sebacate). One or more of the following: pyridyl alcohol ester), HALS-3346 (poly[(6-morpholino-1,3,5-triazine-2,4-yl)-((2,2,6,6-tetramethyl-4-piperidinyl)imine)hexane-((2,2,6,6-tetramethyl-4-piperidinyl)imine)]), HALS-944 (poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidinyl)imine]-1,6-hexadiyl[(2,2,6,6-tetramethyl-4-piperidinyl)imine]]), and HALS-112 (bis(1-octoxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate).

8. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: The environmentally friendly, sunlight-resistant microcapsules have a particle size of 1-5 μm.

9. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: The mass ratio of the shell material to the core material of the environmentally friendly, sunlight-resistant microcapsule is 1:0.5-2.

10. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: The phase transition temperature is 40℃-60℃ for n-alkanes.

11. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 10, characterized in that: The phase transition temperature is one or more of n-octadecane, n-eicosane, and n-docosahexadecane.

12. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: The surfactant mentioned in step S1 is a cationic surfactant; And / or, in step S1, the mass ratio of the nano-tourmaline to the surfactant is 1-10:1, and the mass ratio of the solvent to the surfactant is 5-60:

1.

13. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 12, characterized in that: The surfactant in step S1 is one or more of dodecyl dimethyl benzyl ammonium chloride, hexadecyl trimethyl ammonium bromide, and octadecyl trimethyl ammonium chloride; the solvent in step S1 is one or more of formamide, N,N-dimethylformamide, dimethylacetamide, and dimethylphosphoramide.

14. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: In step S1, the stirring speed is 400-600 rpm; the modification temperature is 100-200℃; and the modification time is 4-10 hours. And / or, in step S3, the stirring speed is 400-600 rpm, the stirring temperature is 40-60℃, and the stirring time is 4-6 hours; And / or, in step S4, the stirring speed is 400-600 rpm, the stirring temperature is 40-60°C, and the stirring time is 4-6 hours; And / or, in step S5, the stirring speed is 400-600 rpm, the stirring temperature is 40-60°C, and the stirring time is 4-6 hours; And / or, in step S6, the stirring speed is 100-300 rpm, the stirring temperature is 20-30°C, and the stirring time is 12-24 hours; And / or, in step S8, the stirring speed is 200-450 rpm, the stirring temperature is 100-190℃, and the stirring time is 2-5 hours.

15. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: In step S3, the solvent is an aprotic solvent with a boiling point >100℃; in step S3, the mass ratio of the core material raw material to the modified nano-tourmaline is 1-20:1; the mass ratio of the solvent to the modified nano-tourmaline is 10-80:

1.

16. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 15, characterized in that: In step S3, the solvent is one or more of formamide, N,N-dimethylformamide, dimethylacetamide, and dimethylphosphoramide.

17. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: In step S4, the titanium dioxide precursor is one or more of tetrabutyl titanate, tetrapropyl titanate, and tetraethyl titanate; in step S4, the mass ratio of the core material raw material to the titanium dioxide precursor is 1:0.5-2.

18. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: In step S6, the buffer solution is one or more of phosphate buffer, carbonate buffer, and tris(hydroxymethyl)aminomethane hydrochloride buffer; the pH value of the buffer solution is 8-10; in step S6, the mass ratio of the buffer solution to the solid powder obtained in step S5 is 30-200:

1.

19. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 18, characterized in that: In step S6, the buffer solution is tris(hydroxymethyl)aminomethane hydrochloride buffer.

20. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: In step S6, after adding dopamine hydrochloride, the mass concentration of dopamine in the reaction system is 2-10 mg / mL.

21. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: The organic solvent mentioned in step S7 is selected from one or more of methanol, butanediol, ethylene glycol, n-butanol, and anhydrous ethanol; And / or, in step S7, the reaction temperature is 80-240°C and the reaction time is 5-10 hours; And / or, in step S7, the mass ratio of the solid powder to the organic solvent is 1:20-100, the mass ratio of the solid powder to the light stabilizer is 1:20-80, and the mass ratio of the solid powder to the strong alkali is 1:0.5-4.

22. The environmentally friendly, sun-resistant, sand-containing fog sealant according to claim 1, characterized in that: In step S8, the mass ratio of the metal ion salt to formamide in the metal ion salt-formamide solution is 0.5-1.5:1; the mass ratio of the metal ion salt-formamide solution in step S8 to the solid powder obtained in step S7 is 10-100:

1.

23. A method for preparing an environmentally friendly, sun-resistant, sand-containing fog seal layer according to any one of claims 1-22, characterized in that: Includes the following steps: P1: Preparation of composite emulsifier; P2: Mix water and part of the composite emulsifier prepared in step P1, adjust the pH value, and obtain soap solution; P3: Heat the asphalt and the soap solution obtained in step P2 separately, and then shear them to obtain emulsified asphalt; P4: Add the remaining portion of the composite emulsifier prepared in step P1 to the emulsified asphalt obtained in step P3, and stir to mix; P5: Add defoamer to the reaction system of step P4 and stir to mix; P6: Add a suspending agent to the reaction system of step P5 and stir to mix; P7: Add environmentally friendly, sunlight-resistant microcapsules to the reaction system of step P6 and stir to mix; P8: Add the composite latex prepared in step P3 to the reaction system in step P7 and stir to mix; P9: Add fine sand particles to the reaction system in step P8, stir and mix to obtain an environmentally friendly, sun-resistant, sand-containing fog seal.

24. The preparation method according to claim 23, characterized in that: In step P2, the stirring speed is 100-600 rpm, the stirring temperature is 50-90℃, and the stirring time is 5-20 minutes. And / or, in step P4, the stirring speed is 100-600 rpm, the stirring temperature is 30-90℃, and the stirring time is 2-20 minutes; And / or, in step P5, the stirring speed is 100-600 rpm, the stirring temperature is 30-90℃, and the stirring time is 2-20 minutes; And / or, in step P6, the stirring speed is 700-1600 rpm, the stirring temperature is 30-90℃, and the stirring time is 10-50 minutes; And / or, in step P7, the stirring speed is 300-500 rpm, the stirring temperature is 30-90℃, and the stirring time is 10-50 minutes; And / or, in step P8, the stirring speed is 300-500 rpm, the stirring temperature is 30-90℃, and the stirring time is 10-50 minutes; And / or, in step P9, the stirring speed is 100-600 rpm, the stirring temperature is 40-90℃, and the stirring time is 2-20 minutes.

25. The preparation method according to claim 23, characterized in that: In step P2, the pH is adjusted using an aqueous acetic acid solution to a value of 2-4.

26. The preparation method according to claim 23, characterized in that: In step P4, the mass ratio of the added composite emulsifier to the composite emulsifier added in step P2 is 1:2-5.

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