Bio-based non-cured asphalt waterproof coating and preparation method thereof

Abstract

The invention discloses a bio-based non-cured asphalt waterproof coating and a preparation method thereof, the bio-based non-cured asphalt waterproof coating comprises the following components by weight: 27-34 parts of asphalt; 15 to 18 parts by weight of softening oil; 1.5 parts by weight to 2.5 parts by weight of a rubber modifier; 1.5 to 2.5 parts by weight of a temperature-resistant auxiliary agent; 45 parts by weight to 54 parts by weight of an inorganic filler; 0.455 to 2.75 parts by weight of a modified bio-based carbon aerogel; the modified bio-based carbon aerogel is prepared from amino alkyl alkoxy silane and biomass carbon aerogel through a reaction. According to the bio-based non-cured asphalt waterproof coating, the heat insulation effect of the biomass aerogel is utilized, and the modified bio-based carbon aerogel is combined with the components of the traditional non-cured asphalt waterproof coating, so that the bio-based non-cured asphalt waterproof coating has a waterproof effect and also has a good heat insulation effect.

Description

Technical Field

[0001] The present application belongs to the technical field of waterproof materials, and in particular relates to a bio-based non-curing asphalt waterproof coating and a preparation method thereof. Background Art

[0002] Non-curing asphalt waterproof coating has good creep, adhesion and self-healing properties, and is widely used in waterproofing projects such as industrial and civil buildings, roads and bridges, and underground.

[0003] As a traditional non-curing asphalt coating, although it has good waterproof performance, it does not have the function of heat insulation when it comes to roof construction. Therefore, in summer or in some high-temperature areas, even if the roof has a waterproof layer, the indoor temperature is still very high. Therefore, it is imperative to develop a non-curing asphalt waterproof coating that is both waterproof and heat-insulating. Summary of the invention

[0004] The embodiment of the present application provides a bio-based non-curing asphalt waterproof coating and a preparation method thereof. The bio-based non-curing asphalt waterproof coating can not only play a waterproof role, but also effectively insulate.

[0005] In the first aspect, the present application provides a bio-based non-curing asphalt waterproof coating, which includes the following components, measured in parts by weight: asphalt, 27 to 34 parts by weight; softening oil, 15 to 18 parts by weight; rubber modifier, 1.5 to 2.5 parts by weight; heat-resistant additive, 1.5 to 2.5 parts by weight; inorganic filler, 45 to 54 parts by weight; and modified bio-based carbon aerogel, 0.455 to 2.75 parts by weight; the modified bio-based carbon aerogel is obtained by reacting aminoalkylalkoxysilane with biomass carbon aerogel.

[0006] According to an embodiment of the first aspect of the present application, the aminoalkylalkoxysilane contains a C1-C8 alkyl group substituted with an amino group.

[0007] According to an embodiment of the first aspect of the present application, the mass ratio of aminoalkylalkoxysilane to biomass carbon aerogel is 1:(0.5-1.5).

[0008] According to the embodiment of the first aspect of the present application, the needle penetration of asphalt is 60 to 210, with the unit being 1 / 10 mm.

[0009] According to an embodiment of the first aspect of the present application, the softening oil is one or a combination of cycloparaffinic oil, aromatic oil, mineral oil and waste engine oil.

[0010] According to an embodiment of the first aspect of the present application, the rubber modifier includes one or a combination of SBS, SBR, and SIS.

[0011] According to the embodiment of the first aspect of the present application, SBS is a star-shaped butadiene-styrene-butadiene triblock copolymer, the mass content of the styrene segment is 20% to 30%, and the molecular weight is 150,000 to 450,000.

[0012] According to an embodiment of the first aspect of the present application, SBR is styrene-butadiene rubber with a molecular weight of 100,000 to 250,000.

[0013] According to an embodiment of the first aspect of the present application, SIS is a styrene-isoprene-styrene triblock copolymer with a molecular weight of 70,000 to 150,000 and a mass content of the isoprene segment of 25% to 35%.

[0014] According to an embodiment of the first aspect of the present application, the temperature-resistant auxiliary agent is one or a combination of wax powder, ethylene glycol diacrylate, and 2-ethyl acrylate.

[0015] According to an embodiment of the first aspect of the present application, the inorganic filler is one or a combination of heavy calcium, talcum powder, mica powder, kaolin, perlite, and ceramic powder.

[0016] According to an embodiment of the first aspect of the present application, the average particle size of the inorganic filler is 200 mesh to 400 mesh.

[0017] In the second aspect, the present application provides a method for preparing the above-mentioned bio-based non-curing asphalt waterproof coating, including: providing modified bio-based carbon aerogel; mixing and melting asphalt and softening oil to obtain an asphalt dispersion; adding a rubber modifier to the asphalt dispersion, and heating it to 170°C to 180°C for insulation treatment to obtain a first dispersion; adding an inorganic filler to the first dispersion to disperse it to obtain a second dispersion; adding a heat-resistant additive and modified bio-based carbon aerogel to the second dispersion to prepare a non-curing asphalt waterproof coating.

[0018] According to an embodiment of the second aspect of the present application, a modified bio-based carbon aerogel is provided, including: dispersing wood material and water according to a preset ratio and performing hydrothermal treatment to obtain a modified biomass gel; washing and drying the modified biomass gel using an alcohol solvent to obtain a biomass carbon aerogel; and modifying the biomass carbon aerogel using aminoalkyl alkoxy silane, wherein the mass ratio of aminoalkyl alkoxy silane to biomass carbon aerogel is 1:(0.5-1.5), to obtain a modified bio-based carbon aerogel.

[0019] According to an embodiment of the first aspect of the present application, the wood material is selected from at least one of eucalyptus, pine, poplar, elm, willow, apricot, birch, maple, camphor, shrubs and straw.

[0020] According to an embodiment of the second aspect of the present application, the wood material and water are dispersed according to a preset mass ratio of 1:(2.5-5).

[0021] According to an embodiment of the second aspect of the present application, dispersing the wood material and water according to a preset ratio and performing a hydrothermal treatment includes: dispersing the wood material and water according to a preset ratio to obtain a first mixture; adjusting the pH of the first mixture to 8-12, and adding an epoxy modifier to the first mixture for modification treatment at 180°C to 200°C, wherein the mass ratio of the epoxy modifier to the wood material is 1:(0.5-3), to obtain a modified biomass gel.

[0022] According to an embodiment of the second aspect of the present application, the modified biomass gel is washed and dried using an alcohol solvent, including: washing the modified biomass gel with an alcohol solvent for multiple times to replace the moisture in the modified biomass gel; freeze-drying the modified biomass gel from which the moisture has been removed at -20°C to -10°C to obtain biomass carbon aerogel.

[0023] According to an embodiment of the second aspect of the present application, biomass carbon aerogel is modified using aminoalkylalkoxysilane, including: mixing the biomass carbon aerogel and aminoalkylalkoxysilane in a mass ratio of 1: (0.5 to 1.5) to obtain a first mixed liquid; adding concentrated sulfuric acid accounting for 0.01% to 0.05% of the total mass of the first mixed liquid to the first mixed liquid, and preparing modified bio-based carbon aerogel at 120°C to 130°C and -80 to -90KPa.

[0024] According to an embodiment of the second aspect of the present application, the aminoalkylalkoxysilane contains a C1-C8 alkyl group substituted with an amino group.

[0025] According to an embodiment of the second aspect of the present application, the aminoalkylalkoxysilane is selected from a combination of one or more of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 4-aminobutyltriethoxysilane, 4-amino-3,3-dimethylbutyltrimethoxysilane, N-[3-(trimethoxysilyl)propyl]n-butylamine, γ-aminoethylaminopropyltrimethoxysilane, and N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane.

[0026] The bio-based non-curing asphalt waterproof coating of the embodiment of the present application utilizes the heat-insulating effect of biomass aerogel and combines the modified bio-based carbon aerogel improved from the biomass aerogel with the components of the non-curing asphalt waterproof coating, so that the bio-based non-curing asphalt waterproof coating can have a good heat-insulating effect while having a waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a flow chart of the preparation method of the bio-based non-curing asphalt waterproof coating provided in this application. DETAILED DESCRIPTION

[0029] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0031] As described in the background technology section, the existing non-curing asphalt waterproof coating is a waterproof coating made of rubber, asphalt, and softening oil as the main components, with the addition of a temperature control agent and a filler. It only has a waterproof effect, and it is difficult to play a heat-insulating role when it is constructed on roofs in hot summer or high-temperature areas. The inventors of this application found that biomass aerogel has the characteristics of good heat insulation effect. Combining it with traditional non-curing asphalt waterproof coating can achieve the purpose of heat insulation while having a waterproof effect. However, biomass aerogel is water-based, while non-curing asphalt waterproof coatings are generally oily, and the two are difficult to disperse evenly into a uniform system.

[0032] In order to solve the problems of the prior art, the embodiment of the present application provides a non-curing asphalt waterproof coating and a preparation method thereof. The non-curing asphalt waterproof coating provided by the embodiment of the present application is first introduced below.

[0033] In the first aspect, an embodiment of the present application provides a bio-based non-curing asphalt waterproof coating, which includes the following components, measured in parts by weight: asphalt, 27 parts by weight to 34 parts by weight; softening oil, 15 parts by weight to 18 parts by weight; rubber modifier, 1.5 parts by weight to 2.5 parts by weight; heat-resistant additive, 1.5 parts by weight to 2.5 parts by weight; inorganic filler, 45 parts by weight to 54 parts by weight; and modified bio-based carbon aerogel, 0.455 parts by weight to 2.75 parts by weight; the modified bio-based carbon aerogel is obtained by reacting aminoalkylalkoxysilane with biomass carbon aerogel.

[0034] The bio-based non-curing asphalt waterproof coating of the embodiment of the present application utilizes the heat-insulating effect of biomass aerogel and combines the modified bio-based carbon aerogel improved from the biomass aerogel with the components of the non-curing asphalt waterproof coating, so that the bio-based non-curing asphalt waterproof coating can have a good heat-insulating effect while having a waterproof effect.

[0035] In some embodiments of the present application, the penetration of asphalt is 60 to 210, and the unit is 1 / 10 mm. For example, the asphalt can be selected from one or a combination of 70#, 90#, and 200# asphalt. The smaller the penetration value of asphalt, the harder the asphalt, the greater the viscosity, and the stronger the ability to resist shear deformation. 1 / 10 mm is the unit of penetration.

[0036] In an embodiment of the present application, the modified bio-based carbon aerogel is prepared by reacting aminoalkylalkoxysilane with biomass carbon aerogel, so that the modified bio-based carbon aerogel itself has a good hydrophobic effect while having a heat-insulating effect, and can be dispersed into a uniform system with the non-curing asphalt waterproof coating.

[0037] In some embodiments of the present application, the mass ratio of aminoalkylalkoxysilane to biochar aerogel is 1:(0.5-1.5).

[0038] In some embodiments of the present application, the softening oil is one or a combination of cycloparaffinic oil, aromatic oil, mineral oil and waste engine oil.

[0039] In some embodiments of the present application, the rubber modifier includes one or a combination of SBS, SBR, and SIS.

[0040] In some embodiments of the present application, SBS is a star-shaped butadiene-styrene-butadiene triblock copolymer, the mass content of the styrene segment is 20% to 30%, and the molecular weight is 150,000 to 450,000. The star-shaped SBS is more stable in the bio-based non-curing asphalt waterproof coating.

[0041] In some embodiments, the molecular weight of the SBR styrene butadiene rubber is 100000 to 250000. For example, at least styrene butadiene rubber with a grade of 473 purchased from Yueyang Baling Petrochemical can be selected.

[0042] In some embodiments of the present application, SIS is a styrene-isoprene-styrene triblock copolymer with a molecular weight of 70,000 to 150,000 and an isoprene segment content of 25% to 35%. For example, at least SIS purchased from Yueyang Baling Petrochemical with a grade of 1105 can be selected.

[0043] In some embodiments of the present application, the heat-resistant auxiliary agent is one or a combination of wax powder, ethylene glycol diacrylate, and 2-ethyl acrylate.

[0044] In some embodiments of the present application, the inorganic filler is one or a combination of heavy calcium, talc, mica powder, kaolin, perlite, and ceramic powder.

[0045] In the embodiments of the present application, some of the fillers are fillers with poor thermal conductivity, such as talcum powder, mica powder, perlite, and ceramic powder. On the basis of the bio-based non-curing asphalt waterproof coating preventing heat transfer and limiting convective heat transfer through multiple barrier layers in the thickness direction and horizontal direction of the coating layer formed by the bio-based non-curing asphalt waterproof coating, they can be combined with fillers with poor thermal conductivity to form a structure with poor thermal conductivity to further prevent heat transfer, thereby playing an effective thermal insulation role.

[0046] In some embodiments, the average particle size of the inorganic filler is 200-1000 mesh. For example, the average particle size of the inorganic filler is 220 mesh, 240 mesh, 300 mesh, 350 mesh, 380 mesh, 400 mesh, 420 mesh, 500 mesh, 600 mesh, 700 mesh, 720 mesh, 750 mesh, 800 mesh, 900 mesh.

[0047] Second, as Figure 1As shown, the present application provides a method for preparing the above-mentioned non-curing asphalt waterproof coating, including: providing modified bio-based carbon aerogel; mixing and melting asphalt and softening oil to obtain an asphalt dispersion; adding a rubber modifier to the asphalt dispersion, and heating it to 170°C to 180°C for insulation treatment to obtain a first dispersion; adding an inorganic filler to the first dispersion to disperse it to obtain a second dispersion; adding a heat-resistant additive and modified bio-based carbon aerogel to the second dispersion to obtain a non-curing asphalt waterproof coating.

[0048] The preparation method of the bio-based non-curing asphalt waterproof coating of the present application combines modified bio-based carbon aerogel with non-curing asphalt waterproof coating. The prepared bio-based non-curing asphalt waterproof coating has good heat resistance limit, high combustion grade, and greatly reduced thermal conductivity, which well protects the bio-based non-curing asphalt waterproof coating and prevents the performance of the waterproof coating from decreasing due to changes in external temperature. It not only has good thermal insulation effect, but also has the advantages of light material, low cost, and convenient transportation. It is suitable for industrial large-scale production and has broad market prospects and development potential.

[0049] In some embodiments of the present application, a modified bio-based carbon aerogel is provided, including: dispersing wood material and water according to a preset ratio and performing hydrothermal treatment to obtain a modified biomass gel; washing and drying the modified biomass gel using an alcohol solvent to obtain a biomass carbon aerogel; and modifying the biomass carbon aerogel using aminoalkyl alkoxy silane, wherein the mass ratio of aminoalkyl alkoxy silane to biomass carbon aerogel is 1:(0.5-1.5), to obtain a modified bio-based carbon aerogel.

[0050] The preparation method of the bio-based non-curing asphalt waterproof coating of the present application uses waste wood materials as biomass raw materials, undergoes hydrothermal treatment, and is hydrophobically modified with aminoalkyl alkoxy silane to successfully prepare a bio-based non-curing asphalt waterproof coating with good flame retardant properties and excellent thermal insulation effect. This not only realizes the resource utilization of waste, but also is more in line with the country's low-carbon and environmental protection concept.

[0051] In some embodiments of the present application, the wood material is selected from at least one of eucalyptus, pine, poplar, elm, willow, apricot, birch, maple, camphor, shrubs, and straw chips.

[0052] In some embodiments of the present application, the wood material and water are dispersed according to a preset mass ratio of 1: (2.5-5). Exemplarily, the preset mass ratio of the wood material and water is 1:2.8, 1:3.0, 1:3.2, 1:3.5, 1:3.8, 1:4.0, 1:4.2, 1:4.5, 1:4.8, 1:5.0.

[0053] In some embodiments of the present application, dispersing the wood material and water according to a preset ratio and performing a hydrothermal treatment includes: dispersing the wood material and water according to a preset ratio to obtain a first mixture; adjusting the pH of the first mixture to 8-12, and adding an epoxy modifier to the first mixture for modification treatment at 180°C to 200°C, wherein the mass ratio of the epoxy modifier to the wood material is 1:(0.5-3), to obtain a modified biomass gel.

[0054] It should be noted that the water used to obtain the first mixture is distilled water. Exemplarily, the mass ratio of the epoxy modifier to the wood material is 1:0.6, 1:0.8, 1:1.0, 1:1.25, 1:1.3, 1:1.35, 1:1.5, 1:1.6, 1:1.7, 1:1.75, 1:7.2, 1:1.8, 1:1.9, 1:1.95, 1:2.0, 1:2.5, 1:2.8.

[0055] In an embodiment of the present application, the pH value of the first mixture can be adjusted to 8 to 12 by adding an alkaline compound to the first mixture. The alkaline compound is selected from alkali metal hydroxides or ammonia. For example, sodium hydroxide, potassium hydroxide, and ammonia can be added to adjust the pH value of the first mixture to 8, 8.3, 8.5, 9, 9.7, 10, 10.5, 11, 11.5, and 12.

[0056] In the embodiments of the present application, the epoxy modifier is epichlorohydrin or ethylene oxide or a combination thereof. In addition to the epoxy group of epichlorohydrin in the epoxy modifier forming a covalent bond with the hydroxyl, amine, and carboxyl active groups in the wood material, the chloropropane group will undergo a substitution reaction with the nucleophilic substance or nucleophilic group in the wood material to generate a new compound with a cross-linked structure, thereby forming a macromolecular compound. The ethylene oxide in the epoxy modifier forms a covalent bond with the hydroxyl, amine, and carboxyl active groups in the wood material, and can also form a macromolecular compound with a certain molecular weight.

[0057] In some embodiments of the present application, the modified biomass gel is washed and dried using an alcohol solvent, including: washing the modified biomass gel with an alcohol solvent for multiple times to replace the water in the modified biomass gel; and freezing the washed product; and freeze-drying the modified biomass gel from which the water has been removed at -20°C to -10°C to obtain biomass carbon aerogel.

[0058] In an embodiment of the present application, washing the modified biomass aerogel includes: washing the first product multiple times with distilled water, ethanol or isopropanol in sequence. That is, the first product is first washed multiple times with distilled water, and then washed multiple times with ethanol, or ethanol and isopropanol, or isopropanol, to remove excess alkali and solvent in the crude modified biomass gel product.

[0059] In the embodiments of the present application, the biomass carbon aerogel obtained by freeze-drying the modified biomass gel is in powder form.

[0060] In some embodiments of the present application, the average particle size of the biomass carbon aerogel is 5 nm to 30 nm.

[0061] In some embodiments of the present application, the frozen biomass-modified aerogel is freeze-dried at -20°C to -10°C, and the freeze-drying time is 20 hours to 25 hours.

[0062] In some embodiments of the present application, biochar aerogel is modified using aminoalkylalkoxysilane, including: mixing the biochar aerogel and aminoalkylalkoxysilane in a mass ratio of 1:(0.5~1.5) to obtain a first mixed solution; adding 0.01%~0.05% concentrated sulfuric acid accounting for the total mass of the first mixed solution to the first mixed solution, and preparing modified bio-based carbon aerogel at 120℃~130℃ and -80KPa~-90KPa.

[0063] In the embodiments of the present application, a powdered biomass carbon aerogel is modified by a liquid aminoalkylalkoxysilane to obtain a final powdered, hydrophobic modified bio-based carbon aerogel, so that the modified bio-based carbon aerogel can be fully dispersed with the components of the oily non-curing asphalt waterproof coating into a uniform system, and a viscous and paste-like bio-based non-curing asphalt waterproof coating is obtained. Furthermore, the modified bio-based carbon aerogel dispersed in the bio-based non-curing asphalt waterproof coating contains aminoalkylalkoxysilane structural groups that can improve the high temperature resistance, that is, the thermal insulation performance, of the non-curing asphalt waterproof coating. It should be noted that the initial state of the obtained bio-based non-curing asphalt waterproof coating is fluid, and after cooling, it presents a paste similar to asphalt.

[0064] In the bio-based non-curing asphalt waterproof coating of the present application, the components of the non-curing asphalt waterproof coating can be combined with the modified bio-based carbon aerogel through physical interaction and chemical covalent bonds to form the skeleton of the bio-based non-curing asphalt waterproof coating, such as asphalt molecules, rubber modifiers and other components forming mutually entangled molecules, thereby enhancing the network structure of the non-curing asphalt waterproof coating. The modified bio-based carbon aerogel has a larger specific surface area and more pores. The modified bio-based carbon aerogel is distributed in the bio-based non-curing asphalt waterproof coating and can enter the skeleton formed by other components such as asphalt molecules and modifiers. The modified bio-based carbon aerogel can react with the components of the non-curing asphalt waterproof coating through groups such as hydroxyl and carboxyl groups and covalently connect. The modified biomass carbon aerogel and its pores separate the non-curing asphalt waterproof coating into multiple barrier layers, limiting the convective heat transfer of the air in the waterproof coating layer. That is, the bio-based non-curing asphalt waterproof coating of the present application combines the prevention of heat transfer and the restriction of convective heat transfer by forming multiple barrier layers in the thickness direction and horizontal direction of the coating layer along the bio-based non-curing asphalt waterproof coating to play an effective heat insulation role. At the same time, when the aminoalkyl alkoxy silane connected to the surface of the modified bio-based carbon aerogel meets water, the aminoalkyl group can prevent water from penetrating into the base surface through the bio-based non-curing asphalt waterproof coating in the barrier layer, and the alkoxy group can undergo a hydrolysis reaction to form a condensation polymer when it meets water, thereby improving the bonding strength between the aminoalkyl alkoxy silane connected to the surface of the modified bio-based carbon aerogel in the bio-based non-curing asphalt waterproof coating and the base surface and other components, thereby improving the thermal stability of the bio-based non-curing asphalt waterproof coating, and overall improving the thermal insulation and waterproof properties of the bio-based non-curing asphalt waterproof coating.

[0065] In some embodiments of the present application, the aminoalkylalkoxysilane contains a C1-C8 alkyl group substituted with an amino group, that is, the aminoalkyl group in the aminoalkylalkoxysilane is a C1-C8 alkyl group containing an amino substituent.

[0066] In some embodiments of the present application, the aminoalkylalkoxysilane is selected from a combination of one or more of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 4-aminobutyltriethoxysilane, 4-amino-3,3-dimethylbutyltrimethoxysilane, N-[3-(trimethoxysilyl)propyl]n-butylamine, γ-aminoethylaminopropyltrimethoxysilane, and N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane.

[0067] In the embodiments of the present application, the biochar aerogel undergoes an amidation reaction with the amino group in the aminoalkylalkoxysilane through the carboxyl group, so that the aminoalkylalkoxysilane is connected to the biochar aerogel to form a modified bio-based carbon aerogel, reducing the hydrophilic carboxyl groups on the surface of the biochar aerogel, and the concentrated sulfuric acid provides the environment required for the reaction. Thus, the modified bio-based carbon aerogel has good hydrophobic properties. After being applied to the traditional non-curing asphalt waterproof coating, the prepared bio-based non-curing asphalt waterproof coating has a waterproof effect after molding, and also has good thermal insulation properties. The aminoalkylalkoxysilane connected to the modified bio-based carbon aerogel further improves the waterproof performance of the bio-based non-curing asphalt waterproof coating.

[0068] Moreover, the chemical bond formed after the reaction between the amino group in aminoalkylalkoxysilane and the hydroxyl group in biochar aerogel is strong and not easy to break, so that the reaction product of aminoalkylalkoxysilane and biochar aerogel, namely modified bio-based carbon aerogel, makes the biomass aerogel more compatible in non-curing asphalt waterproof coatings and more stable in low or high temperature thermal environments, so that the bio-based non-curing asphalt waterproof coating containing modified bio-based carbon aerogel also has good high and low temperature resistance.

[0069] In the embodiments of the present application, the bio-based non-curing asphalt waterproof coating can be directly applied to the location on the surface of the building or structure that needs waterproofing and heat insulation to form a bio-based non-curing asphalt waterproof coating layer, and then the waterproof roll is covered on the bio-based non-curing asphalt waterproof coating to waterproof and heat-insulate the location that needs waterproofing and heat insulation. At the same time, the bio-based non-curing asphalt waterproof coating, the modified bio-based carbon aerogel prepared by the reaction of aminoalkyl alkoxy silane and biomass carbon aerogel, can enhance the adhesion between the bio-based non-curing asphalt waterproof coating and the base surface to be constructed, or enhance the adhesion between the bio-based non-curing asphalt waterproof coating and the waterproof roll.

[0070] The technical solution of the present application is further described below through specific examples and comparative examples to make the technical solution clearer and more specific. The following are the specifications, models or available sources of some raw material components used in the examples and comparative examples. The components or raw materials not mentioned can be purchased from the market.

[0071] Softening oil, purchased from Sinopec. SBS, molecular weight of 150,000-300,000, of which the mass content of styrene segments is 20%-30%; trade name 411, purchased from Yueyang Baling Petrochemical. ; SBR, molecular weight of 100,000-250,000, trade name 473, purchased from Yueyang Baling Petrochemical. SIS, molecular weight of 70,000-150,000, of which the mass content of isoprene segments is 25%-35%, trade name 1105, purchased from Yueyang Baling Petrochemical. Inorganic filler, heavy calcium powder, average particle size of 800-1000 mesh; mica powder, 300-350 mesh. Heat-resistant additive, ethylene glycol diacrylate; purchased from Kain Chemical Co., Ltd.

[0072] Preparation of modified bio-based carbon aerogel

[0073] Preparation Example 1

[0074] The preparation of modified bio-based carbon aerogel includes: dispersing wood material and water according to a preset ratio and performing hydrothermal treatment, including: the wood material uses eucalyptus and pine wood chips with a mass ratio of 1:1, dispersing the wood material and water according to a preset mass ratio of 1:2.5, and the water is deionized water, to obtain a first mixture mixed evenly; adjusting the pH of the first mixture to 9, and adding ethylene oxide to the first mixture, wherein the mass ratio of ethylene oxide to wood material is 1:1.5, and mixing evenly by magnetic stirring; transferring the evenly mixed product to a polytetrafluoroethylene hydrothermal reactor, performing modification treatment at 185°C to 190°C for 10 hours, and obtaining a black modified biomass gel. The modified biomass gel was washed and dried with an alcohol solvent, including: washing the modified biomass gel with ethanol and distilled water for 5 times respectively to replace the water in the modified biomass gel; and freezing the washed product in a refrigerator for 24 hours; and freeze-drying the frozen modified biomass gel at -18°C for 22 hours to obtain biomass carbon aerogel. The biomass carbon aerogel was modified with 3-aminopropyltrimethoxysilane, including: mixing the biomass carbon aerogel with 3-aminopropyltrimethoxysilane in a mass ratio of 1:1 to obtain a first mixed solution; adding concentrated sulfuric acid accounting for 0.01% of the total mass to the first mixed solution, and reacting at 120°C to 130°C and -80KPa to -90KPa for 2 hours to obtain a modified bio-based carbon aerogel 1.

[0075] Preparation Example 2

[0076] The preparation of modified bio-based carbon aerogel includes: dispersing wood material and water according to a preset ratio and performing hydrothermal treatment, including: the wood material uses eucalyptus and pine wood chips with a mass ratio of 1:1, dispersing the wood material and water according to a preset mass ratio of 1:2.5, and the water is deionized water, to obtain a first mixture mixed evenly; adjusting the pH of the first mixture to 9, and adding ethylene oxide to the first mixture, wherein the mass ratio of ethylene oxide to wood material is 1:1.5, and mixing evenly by magnetic stirring; transferring the evenly mixed product to a polytetrafluoroethylene hydrothermal reactor, performing modification treatment at 185°C to 190°C for 10 hours, and obtaining a black modified biomass gel. The modified biomass gel is washed and dried with an alcohol solvent, including: washing the modified biomass gel with ethanol and distilled water for 5 times respectively to replace the water in the modified biomass gel; and freezing the washed product in a refrigerator for 24 hours; and freeze-drying the frozen modified biomass gel at -18°C for 22 hours to obtain biomass carbon aerogel. The biomass carbon aerogel is modified with 3-aminopropyltrimethoxysilane, including: mixing the biomass carbon aerogel with 3-aminopropyltrimethoxysilane at a mass ratio of 1.4:1 to obtain a first mixed solution; adding concentrated sulfuric acid accounting for 0.01% of the total mass to the first mixed solution, reacting at 120°C to 130°C and -80KPa to -90KPa for 2 hours to obtain a modified bio-based carbon aerogel 2.

[0077] Preparation Example 3

[0078] The preparation of the modified upgraded aerogel is different from that of Preparation Example 1 in that the mass ratio of biomass carbon aerogel to 3-aminopropyltrimethoxysilane is 2:1, and modified bio-based carbon aerogel 3 is obtained.

[0079] Example 1

[0080] The present embodiment provides a bio-based non-curing asphalt waterproof coating, which includes the following components in parts by weight: 70# asphalt, 27 parts by weight; softening oil, 15 parts by weight; rubber modifier, 0.5 parts by weight of SBS, 1.5 parts by weight of SBR; heat-resistant additive, 2 parts by weight; inorganic filler, 54 parts by weight; modified bio-based carbon aerogel 1 prepared in Preparation Example 1, 0.5 parts by weight.

[0081] The present embodiment also provides a preparation method of the above-mentioned bio-based non-curing asphalt waterproof coating, comprising: mixing 70# asphalt and softening oil according to a ratio, stirring the mixture at a speed of 800 rpm, heating the mixture to 140°C to 145°C and then keeping it warm for 1.5 hours until the asphalt is completely melted, to obtain an asphalt dispersion; adding rubber modifiers SBR and SBS to the asphalt dispersion according to a ratio, heating the mixture to 170°C to 180°C and then keeping it warm for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to a ratio and keeping it warm for 0.5 hours to obtain a second dispersion; adding a heat-resistant additive and 0.5 parts by weight of modified bio-based carbon aerogel 1 to the second dispersion, continuing to stir at a constant temperature for 0.5 hours, and discharging and packaging the material to obtain a bio-based non-curing asphalt waterproof coating.

[0082] Example 2

[0083] The present embodiment provides a bio-based non-curing asphalt waterproof coating, which includes the following components in parts by weight: 70# asphalt, 29 parts by weight; softening oil, 16 parts by weight; rubber modifier, 1 part by weight of SBS, 1 part by weight of SBR; heat-resistant additive, 2 parts by weight; inorganic filler, 51 parts by weight; modified bio-based carbon aerogel 1 prepared in Preparation Example 1, 1.5 parts by weight.

[0084] The present embodiment also provides a method for preparing the above-mentioned bio-based non-curing asphalt waterproof coating, comprising: mixing 70# asphalt and softening oil according to a ratio, stirring the mixture at a speed of 800 rpm, heating the mixture to 140°C to 145°C and then keeping it warm for 1.5 hours until the asphalt is completely melted, to obtain an asphalt dispersion; adding rubber modifiers SBR and SBS to the asphalt dispersion according to a ratio, heating the mixture to 170°C to 180°C and then keeping it warm for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to a ratio and keeping it warm for 0.5 hours to obtain a second dispersion; adding a heat-resistant additive and 1.5 parts by weight of modified bio-based carbon aerogel 1 to the second dispersion, continuing to stir at a constant temperature for 0.5 hours, and discharging and packaging to obtain a bio-based non-curing asphalt waterproof coating.

[0085] Example 3

[0086] The present embodiment provides a bio-based non-curing asphalt waterproof coating, which includes the following components in parts by weight: 70# asphalt, 32 parts by weight; softening oil, 18 parts by weight; rubber modifier, 1.25 parts by weight of SBS, 0.75 parts by weight of SBR; heat-resistant additive, 2 parts by weight; inorganic filler, 46 parts by weight; modified bio-based carbon aerogel prepared in Preparation Example 1, 1, 2.5 parts by weight.

[0087] The present embodiment also provides a method for preparing the above-mentioned bio-based non-curing asphalt waterproof coating, comprising: mixing 70# asphalt and softening oil according to a ratio, stirring the mixture at a speed of 800 rpm, heating the mixture to 140°C to 145°C and then keeping it warm for 1.5 hours until the asphalt is completely melted, to obtain an asphalt dispersion; adding rubber modifiers SBR and SBS to the asphalt dispersion according to a ratio, heating the mixture to 170°C to 180°C and then keeping it warm for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to a ratio and keeping it warm for 0.5 hours to obtain a second dispersion; adding a heat-resistant additive and 2.5 parts by weight of modified bio-based carbon aerogel 1 to the second dispersion, continuing to stir at a constant temperature for 0.5 hours, and discharging and packaging to obtain a bio-based non-curing asphalt waterproof coating.

[0088] Example 4

[0089] The present embodiment provides a bio-based non-curing asphalt waterproof coating, which includes the following components in parts by weight: 70# asphalt, 34 parts by weight; softening oil, 18 parts by weight; rubber modifier, 1.25 parts by weight of SBS, 0.75 parts by weight of SBR; heat-resistant additive, 2 parts by weight; inorganic filler, 45.5 parts by weight; modified bio-based carbon aerogel prepared in Preparation Example 1, 1, 2.5 parts by weight.

[0090] The present embodiment also provides a method for preparing the above-mentioned bio-based non-curing asphalt waterproof coating, comprising: mixing 70# asphalt and softening oil according to a ratio, stirring the mixture at a speed of 800 rpm, heating the mixture to 140°C to 145°C and then keeping it warm for 1.5 hours until the asphalt is completely melted, to obtain an asphalt dispersion; adding rubber modifiers SBR and SBS to the asphalt dispersion according to a ratio, heating the mixture to 170°C to 180°C and then keeping it warm for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to a ratio and keeping it warm for 0.5 hours to obtain a second dispersion; adding a heat-resistant additive and 2.5 parts by weight of modified bio-based carbon aerogel 1 to the second dispersion, continuing to stir at a constant temperature for 0.5 hours, and discharging and packaging to obtain a bio-based non-curing asphalt waterproof coating.

[0091] Example 5

[0092] The present embodiment provides a bio-based non-curing asphalt waterproof coating, which includes the following components in parts by weight: 70# asphalt, 32 parts by weight; softening oil, 18 parts by weight; rubber modifier, 1.25 parts by weight of SBS, 0.75 parts by weight of SBR; heat-resistant additive, 2 parts by weight; inorganic filler, 46 parts by weight; modified bio-based carbon aerogel 1 prepared in Preparation Example 1, 1.5 parts by weight.

[0093] The present embodiment also provides a method for preparing the above-mentioned bio-based non-curing asphalt waterproof coating, comprising: mixing 70# asphalt and softening oil according to a ratio, stirring the mixture at a speed of 800 rpm, heating the mixture to 140°C to 145°C and then keeping it warm for 1.5 hours until the asphalt is completely melted, to obtain an asphalt dispersion; adding rubber modifiers SBR and SBS to the asphalt dispersion according to a ratio, heating the mixture to 170°C to 180°C and then keeping it warm for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to a ratio and keeping it warm for 0.5 hours to obtain a second dispersion; adding a heat-resistant additive and 1.5 parts by weight of modified bio-based carbon aerogel 1 to the second dispersion, continuing to stir at a constant temperature for 0.5 hours, and discharging and packaging to obtain a bio-based non-curing asphalt waterproof coating.

[0094] Example 6

[0095] The present embodiment provides a bio-based non-curing asphalt waterproof coating, which includes the following components in parts by weight: 70# asphalt, 32 parts by weight; softening oil, 18 parts by weight; rubber modifier, 1.25 parts by weight of SBS, 0.75 parts by weight of SBR; heat-resistant additive, 2 parts by weight; inorganic filler, 46 parts by weight; modified bio-based carbon aerogel 1 prepared in Preparation Example 1, 0.5 parts by weight.

[0096] The present embodiment also provides a preparation method of the above-mentioned bio-based non-curing asphalt waterproof coating, comprising: mixing 70# asphalt and softening oil according to a ratio, stirring the mixture at a speed of 800 rpm, heating the mixture to 140°C to 145°C and then keeping it warm for 1.5 hours until the asphalt is completely melted, to obtain an asphalt dispersion; adding rubber modifiers SBR and SBS to the asphalt dispersion according to a ratio, heating the mixture to 170°C to 180°C and then keeping it warm for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to a ratio and keeping it warm for 0.5 hours to obtain a second dispersion; adding a heat-resistant additive and 0.5 parts by weight of modified bio-based carbon aerogel 1 to the second dispersion, continuing to stir at a constant temperature for 0.5 hours, and discharging and packaging the material to obtain a bio-based non-curing asphalt waterproof coating.

[0097] Example 7

[0098] The present embodiment provides a bio-based non-curing asphalt waterproof coating, which includes the following components in parts by weight: 70# asphalt, 34 parts by weight; softening oil, 18 parts by weight; rubber modifier, 1.25 parts by weight of SBS, 0.75 parts by weight of SBR; heat-resistant additive, 2 parts by weight; inorganic filler, 45.5 parts by weight; modified bio-based carbon aerogel 2 prepared in Preparation Example 2, 2.5 parts by weight.

[0099] The present embodiment also provides a method for preparing the above-mentioned bio-based non-curing asphalt waterproof coating, comprising: mixing 70# asphalt and softening oil according to a ratio, stirring the mixture at a speed of 800 rpm, heating the mixture to 140°C to 145°C and then keeping it warm for 1.5 hours until the asphalt is completely melted, to obtain an asphalt dispersion; adding rubber modifiers SBR and SBS to the asphalt dispersion according to a ratio, heating the mixture to 170°C to 180°C and then keeping it warm for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to a ratio and keeping it warm for 0.5 hours to obtain a second dispersion; adding a heat-resistant additive and 2.5 parts by weight of modified bio-based carbon aerogel 2 to the second dispersion, continuing to stir at a constant temperature for 0.5 hours, and discharging and packaging to obtain a bio-based non-curing asphalt waterproof coating.

[0100] Example 8

[0101] The difference from Example 4 is that the heavy calcium powder in Example 4 is replaced by mica powder of equal particle size.

[0102] Example 9

[0103] The difference from Example 4 is that the modified bio-based carbon aerogel 1 in the example is replaced by modified bio-based carbon aerogel 3.

[0104] Comparative Example 1

[0105] The present embodiment provides a non-curing asphalt waterproof coating, which includes the following components in parts by weight: 70# asphalt, 32 parts by weight; softening oil, 18 parts by weight; rubber modifier, 1.25 parts by weight of SBS, 0.75 parts by weight of SBR; heat-resistant additive, 2 parts by weight; and inorganic filler, 46 parts by weight.

[0106] This comparative example also provides a preparation method of the above-mentioned non-curing asphalt waterproof coating, comprising: mixing 70# asphalt and softening oil according to a ratio, stirring the mixture at a rotation speed of 800 rpm, heating the mixture to 140°C to 145°C and then keeping it warm for 1.5 hours until the asphalt is completely melted, to obtain an asphalt dispersion; adding rubber modifiers SBR and SBS to the asphalt dispersion according to a ratio, heating the mixture to 170°C to 180°C and then keeping it warm for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to a ratio and keeping it warm for 0.5 hours to obtain a second dispersion; adding a heat-resistant additive to the second dispersion and continuing to stir at a constant temperature for 0.5 hours, and discharging and packaging the material to obtain a non-curing asphalt waterproof coating.

[0107] Comparative Example 2

[0108] The present embodiment provides a non-curing asphalt waterproof coating, which includes the following components in parts by weight: 70# asphalt, 34 parts by weight; softening oil, 18 parts by weight; rubber modifier, 1.25 parts by weight of SBS, 0.75 parts by weight of SBR; heat-resistant additive, 1.5 parts by weight; and inorganic filler, 45.5 parts by weight. The present embodiment also provides a preparation method of the above-mentioned non-curing asphalt waterproof coating, comprising: mixing 70# asphalt and softened oil according to a ratio, stirring the mixture at a rotation speed of 800 rpm, heating the mixture to 140°C to 145°C and then keeping it warm for 1.5 hours until the asphalt is completely melted, to obtain an asphalt dispersion; adding rubber modifiers SBR and SBS to the asphalt dispersion according to a ratio, heating the mixture to 170°C to 180°C and then keeping it warm for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to a ratio and keeping it warm for 0.5 hours to obtain a second dispersion; adding a heat-resistant additive to the second dispersion and continuing to stir at a constant temperature for 0.5 hours, and discharging and packaging the material to obtain a non-curing asphalt waterproof coating.

[0109] Performance Testing

[0110] The bio-based non-curing asphalt waterproof coatings of Examples 1-8 and the non-curing asphalt waterproof coatings of Comparative Examples 1-2 were coated to form corresponding waterproof coating layers for performance testing, and the performance test results were recorded in the following Table 1 for performance comparison.

[0111] 1. Heat resistance test

[0112] Sample preparation and testing were carried out in accordance with Part 14 of the national standard GB / T 328-2007 "Test methods for building waterproof membranes". The heat resistance test conditions used were forced air oven heat aging at 60°C to 150°C.

[0113] 2. Thermal conductivity test

[0114] The thermal conductivity is tested in accordance with the standard GB / T22588-2008 "Flash method for measuring thermal diffusion coefficient or thermal conductivity".

[0115] 3. Combustion level test

[0116] The combustion performance level testing standard is GB50016-2006 "Code for Fire Protection Design of Buildings".

[0117] Test Results

[0118] Table 1 Performance test results of bio-based non-curing waterproof asphalt coating

[0119]

[0120] It should be noted that the heat resistance test data in Table 1 refers to no sliding, flowing, or dripping at the corresponding temperature. For example, the coating layer formed by the bio-based non-curing asphalt waterproof coating in Example 1 has no sliding, flowing, or dripping at 80°C. The same is true for other embodiments or comparative examples, which will not be described here.

[0121] By comparing the components and contents of the bio-based non-curing asphalt waterproof coating of Examples 1-8 and the non-curing asphalt waterproof coating of Comparative Examples 1-2, and the performance test results of Table 1, it can be seen that: compared with the non-curing asphalt waterproof coating of Comparative Examples 1-2 that does not contain the modified bio-based carbon aerogel of the present application, its thermal conductivity is relatively large, which is 0.085 W / (m·K); the heat resistance is poor, which is only 68°C to 70°C.

[0122] The bio-based non-curing asphalt waterproof coating of the embodiment of the present application, after adding modified bio-based carbon aerogel, can effectively reduce the thermal conductivity of the bio-based non-curing asphalt waterproof coating to 0.032W / (m·K)~0.075W / (m·K), and improve the heat resistance to 70℃~80℃, and improve the low-temperature flexibility of the bio-based non-curing asphalt waterproof coating to -22℃~-26℃ without breakage, and improve the elongation performance to 35%~38%, and improve the combustion grade of the bio-based non-curing asphalt waterproof coating to Class A, which is significantly improved compared to the coating performance of the comparative example.

[0123] By comparing Example 3, Example 2 and Example 1, it can be concluded that with the increase of the content of 70# asphalt, softening oil, SBS and SBR, and modified bio-based carbon aerogel, and the decrease of the content of inorganic filler, the thermal conductivity of the bio-based non-curing asphalt waterproof coating at 25°C gradually decreases, the heat resistance gradually weakens, but the elongation performance gradually increases.

[0124] Comparing Example 3 and Example 4, with the increase of the content of 70# asphalt and the relative decrease of heat-resistant additives and inorganic fillers, the thermal conductivity of the bio-based non-curing asphalt waterproof coating at 25°C decreased from 0.041W / (m·K) to 0.036W / (m·K), the heat resistance decreased from 75°C to 70°C, and the low-temperature flexibility increased from -25°C to -26°C, but the elongation performance remained unchanged.

[0125] Comparing Example 3 and Example 5, as the content of modified bio-based carbon aerogel is reduced from 2.5 parts by weight to 1.5 parts by weight, the thermal conductivity of the bio-based non-curing asphalt waterproof coating at 25°C increases from 0.041W / (m·K) to 0.058W / (m·K), the heat resistance remains unchanged, the low-temperature flexibility decreases from -25°C to -24°C, and the elongation performance decreases from 38mm to 36mm.

[0126] Comparing Example 4 and Example 5, as the content of 70# asphalt decreased, the heat-resistant additive and the inorganic filler increased relatively, and the content of modified bio-based carbon aerogel decreased from 2.5 parts by weight to 1.5 parts by weight, the thermal conductivity of the bio-based non-curing asphalt waterproof coating at 25°C increased from 0.035W / (m·K) to 0.058W / (m·K), the heat resistance increased from 70°C to 75°C, the low-temperature flexibility decreased from -26°C to -24°C, and the elongation performance decreased from 38mm to 36mm.

[0127] Comparing Example 3 and Example 6, as the content of modified bio-based carbon aerogel is reduced from 2.5 parts by weight to 0.5 parts by weight, the thermal conductivity of the bio-based non-curing asphalt waterproof coating at 25°C increases from 0.041W / (m·K) to 0.064W / (m·K), the heat resistance remains unchanged, the low-temperature flexibility decreases from -25°C to -23°C, and the elongation performance decreases from 38mm to 37mm. It can be seen that a small amount of modified bio-based carbon aerogel will lead to a significant increase in thermal conductivity, indicating that the amount of modified bio-based carbon aerogel has a more obvious effect on the thermal conductivity of the bio-based non-curing asphalt waterproof coating, thereby affecting its thermal insulation performance.

[0128] Comparing Example 4 and Example 7, when the mass ratio of the coupling agent in the modified bio-based carbon aerogel, i.e. 3-aminopropyltrimethoxysilane, to the biomass carbon aerogel is further reduced from 1:1 to 1:1.4, the thermal conductivity of the bio-based non-curing asphalt waterproof coating at 25°C is reduced from 0.036W / (m·K) to 0.035W / (m·K), and the thermal conductivity changes slightly, indicating that the modification of the biomass carbon aerogel by aminoalkylalkoxysilane containing alkyl groups with alkoxy or amino substituents has little effect on the thermal conductivity of the coating; but the heat resistance is increased from 70°C to 72°C, and the heat resistance is improved, and the low-temperature flexibility and elongation properties remain unchanged, indicating that the modified bio-based carbon aerogel obtained by modifying the biomass carbon aerogel by aminoalkylalkoxysilane containing alkyl groups with alkoxy or amino substituents has a certain influence on the heat resistance and low-temperature flexibility of the bio-based non-curing asphalt waterproof coating when its content is small, but the influence is relatively small. Comparing Examples 4, 7 and 9, when the mass ratio of biochar aerogel to 3-aminopropyltrimethoxysilane is further increased to 2:1, the thermal conductivity of the bio-based non-curing asphalt waterproof coating at 25°C remains at 0.036W / (m·K) from 0.036W / (m·K), but the heat resistance and low-temperature flexibility are reduced, indicating that when the content of 3-aminopropyltrimethoxysilane in the modified bio-based carbon aerogel is low, its heat resistance and low-temperature flexibility will also decrease. This may be due to insufficient modification of the biochar aerogel, which reduces the compatibility of the biochar aerogel with the asphalt coating, but its overall performance is still higher than that of Comparative Examples 1 and 2. The above data prove that the overall performance of the bio-based non-curing asphalt waterproof coating is better when the biochar aerogel and aminoalkylalkoxysilane are kept in an appropriate range.

[0129] Comparing Example 4 and Example 8, when the filler in the bio-based non-curing asphalt waterproof coating is replaced by heavy calcium powder with mica powder of corresponding particle size, its thermal conductivity at 25°C is lower, reaching 0.032W / (m·K), the adhesion performance and elongation are qualified, the heat resistance is improved from 38°C to 39°C, the low-temperature flexibility remains unchanged, but the elongation performance is improved from 38mm to 39mm, indicating that the use of mica powder as a filler in combination with modified bio-based carbon aerogel can further improve the thermal insulation properties of the bio-based non-curing asphalt waterproof coating. This may be because the thermal conductivity of mica powder is poor and mica has a layered structure, which can better prevent heat transfer.

[0130] The above is only a specific implementation method of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application.

Claims

1. A bio-based non-curing asphalt waterproof coating, characterized in that: In parts by weight, it includes the following components: Asphalt, 27 to 34 parts by weight; Softening oil, 15 to 18 parts by weight; Rubber modifier, 1.5 to 2.5 parts by weight; Heat-resistant additive, 1.5 to 2.5 parts by weight; Inorganic filler, 45 to 54 parts by weight; and Modified bio-based carbon aerogel, 0.455 parts by weight to 2.75 parts by weight; the modified bio-based carbon aerogel is prepared by the reaction of aminoalkylalkoxysilane and biomass carbon aerogel.

2. The bio-based non-curing asphalt waterproof coating according to claim 1, characterized in that: Meet one or more of the following requirements: The aminoalkylalkoxysilane contains an amino-substituted C1-C8 alkyl group; The mass ratio of the aminoalkylalkoxysilane to the biomass carbon aerogel is 1:(0.5-1.5); The needle penetration of the asphalt is 60 to 210, in units of 1 / 10 mm; The softening oil is one or a combination of naphthenic oil, aromatic oil, mineral oil and waste engine oil.

3. The bio-based non-curing asphalt waterproof coating according to claim 1, characterized in that: Meet one or more of the following requirements: The aminoalkylalkoxysilane is selected from 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 4-aminobutyltriethoxysilane, 4-amino-3,3-dimethylbutyltrimethoxysilane, N-[3-(trimethoxysilyl)propyl]n-butylamine, γ-aminoethylaminopropyltrimethoxysilane, N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, or a combination thereof; The rubber modifier includes one or a combination of butadiene-styrene-butadiene triblock copolymer, styrene-butadiene rubber and styrene-isoprene-styrene triblock copolymer.

4. The bio-based non-curing asphalt waterproof coating according to claim 3, characterized in that: The butadiene-styrene-butadiene triblock copolymer has a star-shaped structure and a molecular weight of 150,000 to 450,000, wherein the mass content of the styrene chain segment is 20% to 30%; The molecular weight of the styrene-butadiene rubber is 100,000 to 250,000; The molecular weight of the styrene-isoprene-styrene triblock copolymer is 70,000-150,000, wherein the mass content of the isoprene segment is 25%-35%.

5. The bio-based non-curing asphalt waterproof coating according to claim 1, characterized in that: The heat-resistant auxiliary agent is one or a combination of wax powder, ethylene glycol diacrylate, and 2-ethyl acrylate; The inorganic filler includes one or a combination of heavy calcium, talc, mica powder, kaolin, perlite, and ceramic powder; The average particle size of the inorganic filler is 200-1000 meshes.

6. A method for preparing the bio-based non-curing asphalt waterproof coating according to any one of claims 1 to 5, characterized in that: include: Providing modified bio-based carbon aerogels; Mixing and melting asphalt and softened oil to obtain asphalt dispersion; Adding a rubber modifier to the asphalt dispersion, and heating to 170° C. to 180° C. for heat preservation treatment to obtain a first dispersion; Adding an inorganic filler to the first dispersed material for dispersion to obtain a second dispersed material; A heat-resistant additive and modified bio-based carbon aerogel are added to the second dispersed material to prepare a non-curing asphalt waterproof coating.

7. The preparation method according to claim 6, characterized in that: The modified bio-based carbon aerogel provided comprises: Dispersing wood material and water according to a preset ratio and subjecting them to hydrothermal treatment to obtain a modified biomass gel; The modified biomass gel is washed and dried using an alcohol solvent to obtain a biomass carbon aerogel; Biomass carbon aerogel is modified by using aminoalkyl alkoxy silane, wherein the mass ratio of the aminoalkyl alkoxy silane to the biomass carbon aerogel is 1:(0.5-1.5), so as to obtain modified bio-based carbon aerogel.

8. The preparation method according to claim 7, characterized in that: The step of dispersing the wood material and water according to a preset ratio and performing hydrothermal treatment comprises: Dispersing the wood material and water according to a preset ratio to obtain a first mixture; The pH of the first mixture is adjusted to 8-12, and an epoxy modifier is added to the first mixture for modification at 180° C. to 200° C., wherein the mass ratio of the epoxy modifier to the wood material is 1:(0.5-3), to obtain a modified biomass gel; and / or The modified biomass gel is washed with an alcohol solvent and dried, comprising: The modified biomass gel is washed multiple times with an alcohol solvent to replace water in the modified biomass gel; Freeze-drying the modified biomass gel after removing moisture at -20°C to -10°C to obtain biomass carbon aerogel; and / or The modification treatment of biomass carbon aerogel using aminoalkylalkoxysilane comprises: The biomass carbon aerogel and aminoalkyl alkoxy silane are mixed in a mass ratio of 1: (0.5-1.5) to obtain a first mixed solution; Concentrated sulfuric acid accounting for 0.01% to 0.05% of the total mass of the first mixed liquid is added to the first mixed liquid at 120° C. to 130° C. and -80 to -90 KPa to obtain modified bio-based carbon aerogel.

9. The preparation method according to claim 8, characterized in that: One or more of the following conditions are met: The wood material is selected from at least one of eucalyptus, pine, poplar, elm, willow, apricot, birch, maple, camphor, shrubs and straw; The wood material and water are dispersed in a preset mass ratio of 1:(2.5-5); The epoxy modifier is epichlorohydrin or ethylene oxide or a combination thereof; The aminoalkylalkoxysilane contains a C1-C8 alkyl group substituted with an amino group.

10. The preparation method according to any one of claims 7 to 9, characterized in that: The aminoalkylalkoxysilane is selected from a combination of one or more of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 4-aminobutyltriethoxysilane, 4-amino-3,3-dimethylbutyltrimethoxysilane, N-[3-(trimethoxysilyl)propyl]n-butylamine, γ-aminoethylaminopropyltrimethoxysilane, and N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane.

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