Bio-based non-curing asphaltic waterproof coating and method for preparing the same

Abstract

The application discloses a kind of bio-based non-cured asphalt waterproof coating and its preparation method, bio-based non-cured asphalt waterproof coating, by weight parts, including the following components: asphalt, 27 weight parts~34 weight parts;Softening oil, 15 weight parts~18 weight parts;Rubber modifier, 1.5 weight parts~2.5 weight parts;Temperature-resistant auxiliary agent, 1.5 weight parts~2.5 weight parts;Inorganic filler, 45 weight parts~54 weight parts;Modified bio-based carbon aerogel, 0.455 weight parts~2.75 weight parts;Modified bio-based carbon aerogel is obtained by the reaction of amino alkyl alkoxysilane and biomass carbon aerogel.The bio-based non-cured asphalt waterproof coating utilizes the heat insulation effect of biomass aerogel, combines modified bio-based carbon aerogel with the components of traditional non-cured asphalt waterproof coating, so that the bio-based non-cured asphalt waterproof coating can have good heat insulation effect while having waterproof effect.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of waterproof materials, and particularly relates to a bio-based non-cured asphalt waterproof coating and a preparation method thereof. BACKGROUND

[0002] The non-cured asphalt waterproof coating has good creep, adhesion and self-healing properties, and is widely used in waterproof engineering of industrial and civil buildings, roads and bridges, underground engineering and the like.

[0003] As a traditional non-cured asphalt coating, although the non-cured asphalt coating has good waterproof performance, the traditional non-cured asphalt coating does not have the heat insulation effect in some roof construction. Therefore, in summer or in some high-temperature areas, even if the roof has been waterproofed, the indoor temperature is still very high. Therefore, it is imperative to develop a non-cured asphalt waterproof coating which can not only prevent water but also has the heat insulation effect. SUMMARY

[0004] The application provides a bio-based non-cured asphalt waterproof coating and a preparation method thereof, and the bio-based non-cured asphalt waterproof coating can effectively insulate heat while preventing water.

[0005] In a first aspect, the application provides a bio-based non-cured asphalt waterproof coating, which comprises the following components in parts by weight: 27-34 parts by weight of asphalt, 15-18 parts by weight of softening oil, 1.5-2.5 parts by weight of a rubber modifier, 1.5-2.5 parts by weight of a temperature-resistant additive, 45-54 parts by weight of an inorganic filler, and

[0006] 0.455-2.75 parts by weight of modified bio-based carbon aerogel;

[0007] The modified bio-based carbon aerogel is obtained by reacting aminoalkylalkoxysilane with biomass carbon aerogel.

[0008] According to the embodiment of the first aspect of the application, the aminoalkylalkoxysilane contains C1-C8 alkyl substituted with amino.

[0009] According to the embodiment of the first aspect of the application, the mass ratio of the biomass carbon aerogel to the aminoalkylalkoxysilane is 1: (0.5-1.5).

[0010] According to the embodiment of the first aspect of the application, the penetration of the asphalt is 60-210, and the unit is 1 / 10 mm.

[0011] According to the embodiment of the first aspect of the application, the softening oil is one or a combination of several of naphthenic oil, aromatic oil, mineral oil and waste engine oil.

[0012] According to an embodiment of the first aspect of the present application, the rubber modifier comprises one or a combination of SBS, SBR, and SIS.

[0013] According to an embodiment of the first aspect of the present application, the SBS is a star-shaped structure of butadiene-styrene-butadiene triblock copolymer, the mass content of the styrene segment is 20% to 30%, and the molecular weight is 150000 to 450000.

[0014] According to an embodiment of the first aspect of the present application, the SBR is a butadiene-styrene rubber, and the molecular weight is 100000 to 250000.

[0015] According to an embodiment of the first aspect of the present application, the SIS is a styrene-isoprene-styrene triblock copolymer, the molecular weight is 70000 to 150000, and the mass content of the isoprene segment is 25% to 35%.

[0016] According to an embodiment of the first aspect of the present application, the temperature-resistant aid is one or a combination of wax powder, ethylene glycol diacrylate, and 2-ethyl acrylate.

[0017] According to an embodiment of the first aspect of the present application, the inorganic filler is one or a combination of heavy calcium, talc powder, mica powder, kaolin, perlite, and ceramic powder.

[0018] According to an embodiment of the first aspect of the present application, the average particle size of the inorganic filler is 200 to 400 mesh.

[0019] In a second aspect, the present application provides a preparation method of the above-mentioned bio-based non-cured asphalt waterproof coating, comprising: providing modified bio-based carbon aerogel; mixing and melting asphalt and softening oil to obtain asphalt dispersion; adding a rubber modifier to the asphalt dispersion and heating to 170 to 180 DEG C for heat preservation treatment to obtain a first dispersion; dispersing an inorganic filler in the first dispersion to obtain a second dispersion; adding a temperature-resistant aid and modified bio-based carbon aerogel to the second dispersion to obtain a non-cured asphalt waterproof coating.

[0020] According to an embodiment of the second aspect of the present application, the modified bio-based carbon aerogel is prepared by: dispersing wood material and water according to a predetermined ratio and performing hydrothermal treatment to obtain modified biomass gel; washing and drying the modified biomass gel using an alcohol solvent to obtain biomass carbon aerogel; and modifying the biomass carbon aerogel using aminoalkylalkoxysilane, wherein the mass ratio of the biomass carbon aerogel to the aminoalkylalkoxysilane is 1: (0.5 to 1.5).

[0021] According to an embodiment of the first aspect of the present application, the wood material is selected from at least one of wood chips of eucalyptus, pine, poplar, elm, willow, apricot, birch, maple, camphor, shrub, and straw.

[0022] 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).

[0023] According to an embodiment of the second aspect of the present application, dispersing the wood material and water according to the preset ratio and performing hydrothermal treatment includes: dispersing the wood material and water according to the 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 180-200°C, the mass ratio of the epoxy modifier to the wood material being 1:(0.5-3), to obtain a modified biomass gel.

[0024] According to an embodiment of the second aspect of the present application, washing the modified biomass gel using an alcohol solvent and performing drying treatment includes: washing the modified biomass gel using an alcohol solvent multiple times to replace the moisture in the modified biomass gel; and freeze-drying the modified biomass gel from which the moisture has been removed at -20- -10°C to obtain a biomass carbon aerogel.

[0025] According to an embodiment of the second aspect of the present application, modifying the biomass carbon aerogel using an aminoalkyl alkoxysilane includes: mixing the biomass carbon aerogel and the aminoalkyl alkoxysilane according to a mass ratio of 1:(0.5-1.5) to obtain a first mixture; adding concentrated sulfuric acid accounting for 0.01%-0.05% of the total mass of the first mixture to the first mixture, and preparing a modified biomass carbon aerogel at 120-130°C and -80- -90KPa.

[0026] According to an embodiment of the second aspect of the present application, the aminoalkyl alkoxysilane contains an amino-substituted C1-C8 alkyl group.

[0027] According to an embodiment of the second aspect of the present application, the aminoalkyl alkoxysilane is selected from one or more of a combination of 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, 4-aminobutyl triethoxysilane, 4-amino-3,3-dimethylbutyl trimethoxysilane, N-[3-(trimethoxysilyl)propyl]n-butylamine, gamma- aminoethyl aminopropyl trimethoxysilane, and N-beta-(aminoethyl)-gamma- aminopropyl methyl dimethoxysilane.

[0028] The bio-based non-cured asphalt waterproof coating provided by the embodiment of the present application has the characteristics of heat insulation of biomass aerogel, and the modified bio-based carbon aerogel improved from the biomass aerogel is combined with the components of the non-cured asphalt waterproof coating, so that the bio-based non-cured asphalt waterproof coating has the functions of waterproofing and heat insulation. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced. Other drawings can also be obtained by those of ordinary skill in the art without creative labor on the basis of these drawings.

[0030] Figure 1 is a flow chart of the preparation method of the bio-based non-cured asphalt waterproof coating provided by the present application. DETAILED DESCRIPTION

[0031] The features and exemplary embodiments of various aspects of the present application will be described in detail below, and the purposes, technical solutions and advantages of the present application will be more clearly and clearly understood in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, but not to limit the present application. The present application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0032] It should be noted that, in this paper, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the elements defined by the statement "include" do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0033] As described in the background section, the existing non-cured asphalt waterproof coating is a waterproof coating prepared by mixing rubber, asphalt, softening oil as main components, adding temperature control agent and filler. It only has waterproof effect, and it is difficult to play a heat insulation role when applied to the roof in hot summer or high temperature area. The inventors of the present application found that biomass aerogel has good heat insulation effect, and combining it with traditional non-cured asphalt waterproof coating can achieve the purpose of heat insulation while having waterproof effect. However, biomass aerogel is water-based, and non-cured asphalt waterproof coating is generally oil-based, and the two are difficult to disperse uniformly into a uniform system.

[0034] In order to solve the problems in the prior art, the embodiments of the present application provide a non-cured asphalt waterproof coating and a preparation method thereof. First, the non-cured asphalt waterproof coating provided by the embodiments of the present application is introduced.

[0035] In a first aspect, the embodiments of the present application provide a bio-based non-cured asphalt waterproof coating, which comprises the following components 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; temperature-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 prepared by reacting aminoalkylalkoxysilane with biomass carbon aerogel.

[0036] The bio-based non-cured asphalt waterproof coating of the embodiments of the present application utilizes the characteristic of biomass aerogel that has good heat insulation effect, combines the modified bio-based carbon aerogel after improvement of biomass aerogel with the components of non-cured asphalt waterproof coating, so that the bio-based non-cured asphalt waterproof coating not only has waterproof effect, but also has good heat insulation effect.

[0037] In some embodiments of the present application, the asphalt has a penetration of 60 to 210, with a unit of 1 / 10 millimeter. For example, the asphalt can be selected from one or a combination of 70#, 90# and 200# asphalt. The smaller the penetration value of the asphalt, the harder the asphalt, the greater the viscosity, and the stronger the resistance to shear deformation. 1 / 10 millimeter is the unit of penetration.

[0038] In the embodiments 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 good heat insulation effect and good hydrophobic effect, and can be dispersed into a uniform system with non-cured asphalt waterproof coating.

[0039] In some embodiments of the present application, the mass ratio of the biomass charcoal aerogel to the aminoalkyl alkoxysilane is 1: (0.5-1.5).

[0040] In some embodiments of the present application, the softening oil is one or a combination of paraffin oil, aromatic oil, mineral oil, and waste engine oil.

[0041] In some embodiments of the present application, the rubber modifier comprises one or a combination of SBS, SBR, and SIS.

[0042] In some embodiments of the present application, the SBS is a star-shaped structure of butadiene-styrene-butadiene triblock copolymer, the mass content of the styrene segment is 20%-30%, and the molecular weight is 150000-450000. The star-shaped structure of SBS is more stable in the bio-based non-curing asphalt waterproof coating.

[0043] In some embodiments, the SBR is butadiene-styrene rubber with a molecular weight of 100000-250000. Illustratively, at least the butadiene-styrene rubber with a trade name of 473 available from Yueyang Balin Petrochemical Co., Ltd. can be used.

[0044] In some embodiments of the present application, the SIS is a styrene-isoprene-styrene triblock copolymer with a molecular weight of 70000-150000 and a mass content of the isoprene segment of 25%-35%. Illustratively, at least the SIS with a trade name of 1105 available from Yueyang Balin Petrochemical Co., Ltd. can be used.

[0045] In some embodiments of the present application, the temperature-resistant auxiliary agent is one or a combination of wax powder, ethylene glycol dipropyl acrylate, and 2-ethyl acrylate.

[0046] In some embodiments of the present application, the inorganic filler is one or a combination of heavy calcium, talc powder, mica powder, kaolin, perlite, and ceramic powder.

[0047] In some embodiments of the present application, the partial filler is a poor thermal conductivity filler, such as talc powder, mica powder, perlite, and ceramic powder. On the basis of the combination of the multiple barrier layers along the thickness direction and the horizontal direction of the coating layer formed by the bio-based non-curing asphalt waterproof coating, the poor thermal conductivity filler can further prevent heat transfer by forming a poor thermal conductivity structure in combination with the poor thermal conductivity filler, thereby playing an effective heat insulation role.

[0048] In some embodiments, the average particle size of the inorganic filler is 200-1000 mesh. Illustratively, 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, and 900 mesh.

[0049] In some embodiments of the second aspect, the method for preparing the non-cured asphalt waterproof coating comprises the following steps: providing the modified bio-based carbon aerogel; mixing and melting asphalt and softening oil to obtain asphalt dispersion; adding a rubber modifier to the asphalt dispersion and heating to 170-180 DEG C for heat preservation treatment to obtain a first dispersion; adding an inorganic filler to the first dispersion to obtain a second dispersion; and adding a temperature-resistant additive and the modified bio-based carbon aerogel to the second dispersion to obtain the non-cured asphalt waterproof coating. Figure 1

[0050] The method for preparing the bio-based non-cured asphalt waterproof coating of the present application combines the modified bio-based carbon aerogel with the non-cured asphalt waterproof coating. The prepared bio-based non-cured asphalt waterproof coating has good heat resistance limit, high combustion grade, and greatly reduced thermal conductivity, which well protects the bio-based non-cured asphalt waterproof coating, prevents performance degradation of the waterproof coating due to changes in external temperature, has good heat insulation effect, and has the advantages of light weight, low cost, and convenient transportation. The method is suitable for large-scale industrial production and has broad market prospects and development potential.

[0051] In some embodiments of the present application, the modified bio-based carbon aerogel is prepared by dispersing and hydrothermally treating wood material and water in a predetermined ratio 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 aminoalkylalkoxysilane, with the mass ratio of the biomass carbon aerogel to the aminoalkylalkoxysilane being 1: (0.5-1.5) to obtain the modified bio-based carbon aerogel.

[0052] The method for preparing the bio-based non-cured asphalt waterproof coating of the present application uses waste wood material as a biomass raw material, which is hydrothermally treated and hydrophobically modified by aminoalkylalkoxysilane to successfully prepare a bio-based non-cured asphalt waterproof coating with good flame retardant performance and excellent heat insulation effect, thereby realizing resource utilization of waste.

[0053] In some embodiments of the present application, the wood material is selected from at least one of sawdust of eucalyptus, pine, poplar, elm, willow, apricot, birch, maple, camphor wood, shrub, and straw.

[0054] In some embodiments of the present application, the wood material and water are dispersed in a predetermined mass ratio of 1: (2.5-5). For example, the predetermined 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, or 1:5.0.

[0055] ​In some embodiments of the present application, the dispersing and hydrothermal treatment of the lignocellulosic material and water in a preset ratio comprises: dispersing the lignocellulosic material and water in 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 180-200°C, the mass ratio of the epoxy modifier to the lignocellulosic material being 1:(0.5-3) to obtain a modified biomass gel.

[0056] It should be noted that the water used to obtain the first mixture is distilled water. For example, the mass ratio of the epoxy modifier to the lignocellulosic 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.

[0057] In embodiments of the present application, the pH of the first mixture can be adjusted to 8-12 by adding an alkaline compound to the first mixture. The alkaline compound is selected from alkali hydroxides or ammonia water. For example, sodium hydroxide, potassium hydroxide, ammonia water can be added to adjust the pH of the first mixture to 8, 8.3, 8.5, 9, 9.7, 10, 10.5, 11, 11.5, 12.

[0058] In embodiments of the present application, the epoxy modifier is epichlorohydrin or oxirane or a combination thereof. In addition to the formation of covalent bonds between the epoxy group in the epichlorohydrin and the active groups of hydroxyl, amine and carboxyl in the lignocellulosic material, the chloropropane group in the epichlorohydrin can also undergo substitution reaction with nucleophilic substances or nucleophilic groups in the lignocellulosic material to form new compounds with cross-linking structure, thereby forming macromolecular compounds. The oxirane in the epoxy modifier forms covalent bonds with the active groups of hydroxyl, amine and carboxyl in the lignocellulosic material, and can also form macromolecular compounds with a certain molecular weight.

[0059] In some embodiments of the present application, the modified biomass gel is washed and dried using an alcohol solvent, which comprises: washing the modified biomass gel multiple times using an alcohol solvent to replace the moisture in the modified biomass gel; and freezing the washed product; and freeze-drying the modified biomass gel with removed moisture at -20 to -10°C to obtain a biomass charcoal aerogel.

[0060] In embodiments of the present application, the washing of the modified biomass aerogel comprises: washing the first product multiple times using distilled water, ethanol or isopropanol in sequence. That is, the first product is washed multiple times using distilled water, and then washed multiple times using ethanol, or using ethanol and isopropanol, or using isopropanol to remove excess lye and solvent in the modified biomass gel crude product.

[0061] In the embodiments of the present application, the biomass carbon aerogel prepared after freeze-drying of the modified biomass gel is in powder form.

[0062] In some embodiments of the present application, the average particle size of the biomass carbon aerogel is 5-30 nm.

[0063] In some embodiments of the present application, the frozen biomass modified aerogel is freeze-dried at -20- -10°C, and the freeze-drying time is 20-25 hours.

[0064] In some embodiments of the present application, the biomass carbon aerogel is modified by using aminoalkyl alkoxysilane, including: mixing the biomass carbon aerogel with aminoalkyl alkoxysilane at a mass ratio of 1: (0.5-1.5) to obtain a first mixture; adding concentrated sulfuric acid accounting for 0.01%-0.05% of the total mass of the first mixture to the first mixture, and preparing the modified biomass-based carbon aerogel at 120-130°C and -80- -90KPa.

[0065] In the embodiments of the present application, the aminoalkyl alkoxysilane in liquid form is used to modify the biomass carbon aerogel in powder form, and the modified biomass-based carbon aerogel in powder form and hydrophobic is finally prepared, so that the modified biomass-based carbon aerogel can be fully dispersed into a uniform system with the components of the non-solidified asphalt waterproof coating in oil form, and the biomass-based non-solidified asphalt waterproof coating having viscosity and in paste form is prepared. Further, the modified biomass-based carbon aerogel dispersed in the biomass-based non-solidified asphalt waterproof coating contains aminoalkyl alkoxysilane structure groups, which can improve the high-temperature resistance of the non-solidified asphalt waterproof coating, i.e., the heat insulation performance. It should be noted that the prepared biomass-based non-solidified asphalt waterproof coating is in fluid form in the initial state, and presents a paste form similar to asphalt after cooling.

[0066] In the bio-based non-cured asphalt waterproof coating of the present application, the components of the non-cured asphalt waterproof coating can be combined with the modified bio-based carbon aerogel to form the skeleton of the bio-based non-cured asphalt waterproof coating through physical interaction and chemical covalent bond, such as the mutual entanglement of asphalt molecules, rubber modifiers and other components, to achieve the enhancement of the network structure of the non-cured asphalt waterproof coating. The modified bio-based carbon aerogel has a large specific surface area and a large number of pores, and the modified bio-based carbon aerogel is distributed in the bio-based non-cured asphalt waterproof coating, can enter the skeleton formed by the asphalt molecules, modifiers and other components, and the modified bio-based carbon aerogel can be covalently connected with the components of the non-cured asphalt waterproof coating through the groups such as hydroxyl and carboxyl. The modified bio-based carbon aerogel and its pores separate the non-cured asphalt waterproof coating into multiple barrier layers, limiting the convective heat transfer of air in the waterproof coating layer. That is, the bio-based non-cured asphalt waterproof coating of the present application prevents heat transfer and limits convective heat transfer through multiple barrier layers in the thickness direction and horizontal direction of the waterproof coating layer formed by the bio-based non-cured asphalt waterproof coating, to achieve effective thermal insulation. At the same time, when the aminoalkyl alkoxysilane connected to the surface of the modified bio-based carbon aerogel encounters water, the aminoalkyl group can prevent water from penetrating into the base surface through the bio-based non-cured asphalt waterproof coating in the barrier layer, and the alkoxy group can hydrolyze to form a condensed polymer when it encounters water, thereby improving the bonding strength of the aminoalkyl alkoxysilane connected to the surface of the modified bio-based carbon aerogel with the base surface and other components in the bio-based non-cured asphalt waterproof coating, and improving the thermal stability of the bio-based non-cured asphalt waterproof coating, thereby improving the thermal insulation performance and waterproof performance of the bio-based non-cured asphalt waterproof coating as a whole.

[0067] In some embodiments of the present application, the aminoalkyl alkoxysilane contains a C1-C8 alkyl group substituted with an amino group, i.e., the aminoalkyl group in the aminoalkyl alkoxysilane is a C1-C8 alkyl group substituted with an amino group.

[0068] In some embodiments of the present application, the aminoalkyl alkoxysilane is selected from one or more combinations 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.

[0069] In the embodiments of the present application, the biomass charcoal aerogel is acylated by the carboxyl group and the amino group in the aminoalkylalkoxysilane, so that the aminoalkylalkoxysilane is connected to the biomass charcoal aerogel to form a modified bio-based charcoal aerogel, and the number of hydrophilic carboxyl groups on the surface of the biomass charcoal aerogel is reduced. Concentrated sulfuric acid provides the environment required for the reaction. Thus, the modified bio-based charcoal aerogel has good hydrophobic properties. When applied to traditional non-cured asphalt waterproof coating, the bio-based non-cured asphalt waterproof coating prepared has both waterproof function and good thermal insulation after forming. The aminoalkylalkoxysilane connected to the modified bio-based charcoal aerogel further improves the waterproof performance of the bio-based non-cured asphalt waterproof coating.

[0070] The chemical bond between the amino group in the aminoalkylalkoxysilane and the hydroxyl group in the biomass charcoal aerogel is strong and not easy to break, so that the reaction product of the aminoalkylalkoxysilane and the biomass charcoal aerogel, i.e. the modified bio-based charcoal aerogel, makes the biomass aerogel more compatible in the non-cured asphalt waterproof coating and more stable in low-temperature or high-temperature thermal environment. Thus, the bio-based non-cured asphalt waterproof coating containing the modified bio-based charcoal aerogel also has good high- and low-temperature resistance.

[0071] In the embodiments of the present application, the bio-based non-cured asphalt waterproof coating can be directly coated on the position of a building or structure surface that needs waterproofing and thermal insulation to form a bio-based non-cured asphalt waterproof coating layer, and then a waterproofing membrane is overlaid on the bio-based non-cured asphalt waterproof coating to waterproof and insulate the position that needs waterproofing and thermal insulation. At the same time, the modified bio-based charcoal aerogel prepared by the reaction of the aminoalkylalkoxysilane and the biomass charcoal aerogel can enhance the adhesion of the bio-based non-cured asphalt waterproof coating to the surface to be constructed, or enhance the adhesion between the bio-based non-cured asphalt waterproof coating and the waterproofing membrane.

[0072] The technical solutions of the present application are further described below through specific examples and comparative examples to make the technical solutions more clear and explicit. The following are the specifications, models or sources available for some of the raw material components used in the examples and comparative examples. The components or raw materials not mentioned can be purchased on the market.

[0073] Softening oil, purchased from Sinopec. SBS, molecular weight of 150000-300000, wherein the mass content of styrene segment is 20%-30%; commercial brand is 411, purchased from Yueyang Balin Petrochemical. SBR, molecular weight of 100000-250000, commercial brand is 473, purchased from Yueyang Balin Petrochemical. SIS, molecular weight of 70000-150000, wherein the mass content of isoprene segment is 25%-35%, commercial brand is 1105, purchased from Yueyang Balin Petrochemical. Inorganic filler, heavy calcium powder, average particle size of 800-1000 mesh; mica powder, 300-350 mesh. Temperature-resistant auxiliary agent, ethylene glycol diacrylate; purchased from Kaijin Chemical Co., Ltd.

[0074] Preparation of modified bio-based carbon aerogel

[0075] Preparation Example 1

[0076] Preparation of modified bio-based carbon aerogel, comprising: dispersing and hydrothermally treating wood material and water according to a preset ratio, including: the wood material adopts wood chips of eucalyptus and pine with a mass ratio of 1:1, dispersing the wood material and water according to a preset mass ratio of 1:2.5, the water is deionized water, to obtain a first mixture which is uniformly mixed; 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 uniformly mixing by magnetic stirring; transferring the uniformly mixed product into a polytetrafluoroethylene hydrothermal reaction kettle, and modifying at 185-190°C for 10 hours to obtain a black modified biomass gel. Washing and drying treatment of the modified biomass gel using an alcohol solvent, including: washing the modified biomass gel with ethanol and distilled water respectively for 5 times to replace the moisture in the modified biomass gel; and placing the washed product in a refrigerator for 24 hours; freeze-drying the frozen modified biomass gel at-18°C for 22 hours to prepare a biomass carbon aerogel. Modifying the biomass carbon aerogel using 3-aminopropyltrimethoxysilane, including: mixing the biomass carbon aerogel with 3-aminopropyltrimethoxysilane according to a mass ratio of 1:1 to obtain a first mixture; adding 0.01% of concentrated sulfuric acid based on the total mass to the first mixture, and reacting at 120-130°C and-80KPa to-90KPa for 2 hours to prepare a modified bio-based carbon aerogel 1.

[0077] Preparation Example 2

[0078] The preparation of the modified bio-based carbon aerogel comprises: dispersing and hydrothermally treating wood materials and water according to a preset ratio, which comprises: the wood materials are eucalyptus wood and pine wood chips with a mass ratio of 1:1, the wood materials and water are dispersed according to a preset mass ratio of 1:2.5, the water is deionized water, and a uniformly mixed first mixture is obtained; the pH of the first mixture is adjusted to 9, and ethylene oxide is added to the first mixture, wherein the mass ratio of ethylene oxide to wood materials is 1:1.5, and magnetic stirring is used for uniform mixing; the uniformly mixed product is transferred to a polytetrafluoroethylene hydrothermal reaction kettle, and modified treatment is carried out at 185 DEG C ~ 190 DEG C for 10 hours to obtain a black modified biomass gel. The modified biomass gel is washed and dried using an alcohol solvent, which comprises: the modified biomass gel is washed with ethanol and distilled water respectively for 5 times to replace the moisture in the modified biomass gel; and the washed product is placed in a refrigerator and frozen for 24 hours; the frozen modified biomass gel is freeze-dried at -18 DEG C for 22 hours to prepare a biomass carbon aerogel. The biomass carbon aerogel is modified using 3-aminopropyltrimethoxysilane, which comprises: the biomass carbon aerogel and 3-aminopropyltrimethoxysilane are mixed according to a mass ratio of 1.4:1 to obtain a first mixture; 0.01% of concentrated sulfuric acid is added to the first mixture, and the reaction is carried out at 120 DEG C ~ 130 DEG C and -80 KPa ~ -90 KPa for 2 hours to prepare a modified bio-based carbon aerogel 2.

[0079] Preparation Example 3

[0080] The preparation of the modified upgraded aerogel is different from that of Preparation Example 1 in that the mass ratio of the biomass carbon aerogel to 3-aminopropyltrimethoxysilane is 2:1, and a modified bio-based carbon aerogel 3 is prepared. Example 1

[0081] The present embodiment provides a bio-based non-cured asphalt waterproof coating, which comprises 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 and 1.5 parts by weight of SBR; temperature-resistant additive, 2 parts by weight; inorganic filler, 54 parts by weight; modified bio-based carbon aerogel 1 prepared by Preparation Example 1, 0.5 parts by weight.

[0082] The embodiment also provides a preparation method of the above-mentioned bio-based non-cured asphalt waterproof coating, comprising the following steps: mixing 70# asphalt and softening oil according to the proportion, stirring the mixture at a speed of 800 rpm, and heating to 140-145 DEG C and keeping for 1.5 hours until the asphalt is completely melted to obtain asphalt dispersion; adding rubber modifier SBR and SBS to the asphalt dispersion according to the proportion, and heating to 170-180 DEG C and keeping for 2.5 hours to obtain a first dispersion; adding inorganic filler to the first dispersion according to the proportion and keeping for 0.5 hours to obtain a second dispersion; adding temperature-resistant auxiliary agent and 0.5 parts by weight of modified bio-based carbon aerogel 1 into the second dispersion, continuing to stir at constant temperature for 0.5 hours, discharging and packaging to obtain the bio-based non-cured asphalt waterproof coating. Example 2

[0083] The embodiment provides a bio-based non-cured asphalt waterproof coating, which comprises 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 and 1 part by weight of SBR; temperature-resistant auxiliary agent, 2 parts by weight; inorganic filler, 51 parts by weight; and modified bio-based carbon aerogel 1 prepared in Preparation Example 1, 1.5 parts by weight.

[0084] The embodiment also provides a preparation method of the above-mentioned bio-based non-cured asphalt waterproof coating, comprising the following steps: mixing 70# asphalt and softening oil according to the proportion, stirring the mixture at a speed of 800 rpm, and heating to 140-145 DEG C and keeping for 1.5 hours until the asphalt is completely melted to obtain asphalt dispersion; adding rubber modifier SBR and SBS to the asphalt dispersion according to the proportion, and heating to 170-180 DEG C and keeping for 2.5 hours to obtain a first dispersion; adding inorganic filler to the first dispersion according to the proportion and keeping for 0.5 hours to obtain a second dispersion; adding temperature-resistant auxiliary agent and 1.5 parts by weight of modified bio-based carbon aerogel 1 into the second dispersion, continuing to stir at constant temperature for 0.5 hours, discharging and packaging to obtain the bio-based non-cured asphalt waterproof coating. Example 3

[0085] The embodiment provides a bio-based non-cured asphalt waterproof coating, which comprises 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 and 0.75 parts by weight of SBR; temperature-resistant auxiliary agent, 2 parts by weight; inorganic filler, 46 parts by weight; and modified bio-based carbon aerogel 1 prepared in Preparation Example 1, 2.5 parts by weight.

[0086] The embodiment also provides a preparation method of the above-mentioned bio-based non-cured asphalt waterproof coating, comprising the following steps: mixing 70# asphalt and softening oil according to the proportion, stirring the mixture at a speed of 800 rpm, and heating to 140-145 DEG C and keeping for 1.5 hours until the asphalt is completely melted to obtain asphalt dispersion; adding rubber modifier SBR and SBS to the asphalt dispersion according to the proportion, and heating to 170-180 DEG C and keeping for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to the proportion and keeping for 0.5 hours to obtain a second dispersion; adding temperature-resistant additives and 2.5 parts by weight of modified bio-based carbon aerogel 1 into the second dispersion, continuing to stir at constant temperature for 0.5 hours, discharging and packaging to obtain the bio-based non-cured asphalt waterproof coating. Embodiment 4

[0087] The embodiment provides a bio-based non-cured asphalt waterproof coating, which comprises 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 and 0.75 parts by weight of SBR; temperature-resistant additives, 2 parts by weight; inorganic fillers, 45.5 parts by weight; and modified bio-based carbon aerogel 1 prepared in Preparation Example 1, 2.5 parts by weight.

[0088] The embodiment also provides a preparation method of the above-mentioned bio-based non-cured asphalt waterproof coating, comprising the following steps: mixing 70# asphalt and softening oil according to the proportion, stirring the mixture at a speed of 800 rpm, and heating to 140-145 DEG C and keeping for 1.5 hours until the asphalt is completely melted to obtain asphalt dispersion; adding rubber modifier SBR and SBS to the asphalt dispersion according to the proportion, and heating to 170-180 DEG C and keeping for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to the proportion and keeping for 0.5 hours to obtain a second dispersion; adding temperature-resistant additives and 2.5 parts by weight of modified bio-based carbon aerogel 1 into the second dispersion, continuing to stir at constant temperature for 0.5 hours, discharging and packaging to obtain the bio-based non-cured asphalt waterproof coating. Embodiment 5

[0089] The embodiment provides a bio-based non-cured asphalt waterproof coating, which comprises 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 and 0.75 parts by weight of SBR; temperature-resistant additives, 2 parts by weight; inorganic fillers, 46 parts by weight; and modified bio-based carbon aerogel 1 prepared in Preparation Example 1, 1.5 parts by weight.

[0090] The embodiment also provides a preparation method of the above-mentioned bio-based non-cured asphalt waterproof coating, comprising the following steps: mixing 70# asphalt and softening oil according to the proportion, stirring the mixture at a speed of 800 rpm, and heating to 140-145 DEG C and keeping for 1.5 hours until the asphalt is completely melted to obtain asphalt dispersion; adding rubber modifier SBR and SBS to the asphalt dispersion according to the proportion, and heating to 170-180 DEG C and keeping for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to the proportion and keeping for 0.5 hours to obtain a second dispersion; adding temperature-resistant additives and 1.5 parts by weight of modified bio-based carbon aerogel 1 into the second dispersion, continuing to stir at constant temperature for 0.5 hours, discharging and packaging to obtain the bio-based non-cured asphalt waterproof coating. Embodiment 6

[0091] The embodiment provides a bio-based non-cured asphalt waterproof coating, which comprises 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 and 0.75 parts by weight of SBR; temperature-resistant additives, 2 parts by weight; inorganic fillers, 46 parts by weight; and modified bio-based carbon aerogel 1 prepared in Preparation Example 1, 0.5 parts by weight.

[0092] The embodiment also provides a preparation method of the above-mentioned bio-based non-cured asphalt waterproof coating, comprising the following steps: mixing 70# asphalt and softening oil according to the proportion, stirring the mixture at a speed of 800 rpm, and heating to 140-145 DEG C and keeping for 1.5 hours until the asphalt is completely melted to obtain asphalt dispersion; adding rubber modifier SBR and SBS to the asphalt dispersion according to the proportion, and heating to 170-180 DEG C and keeping for 2.5 hours to obtain a first dispersion; adding inorganic fillers to the first dispersion according to the proportion and keeping for 0.5 hours to obtain a second dispersion; adding temperature-resistant additives and 0.5 parts by weight of modified bio-based carbon aerogel 1 into the second dispersion, continuing to stir at constant temperature for 0.5 hours, discharging and packaging to obtain the bio-based non-cured asphalt waterproof coating. Embodiment 7

[0093] The embodiment provides a bio-based non-cured asphalt waterproof coating, which comprises 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 and 0.75 parts by weight of SBR; temperature-resistant additives, 2 parts by weight; inorganic fillers, 45.5 parts by weight; and modified bio-based carbon aerogel 2 prepared in Preparation Example 2, 2.5 parts by weight.

[0094] The embodiment also provides a preparation method of the above-mentioned bio-based non-cured asphalt waterproof coating, comprising the following steps: mixing 70# asphalt and softening oil according to a proportion, stirring the mixture at a rotating speed of 800 rpm, and heating to 140-145 DEG C and keeping for 1.5 hours until the asphalt is completely melted to obtain asphalt dispersion; adding rubber modifier SBR and SBS to the asphalt dispersion according to a proportion, and heating to 170-180 DEG C and keeping for 2.5 hours to obtain a first dispersion; adding inorganic filler to the first dispersion according to a proportion and keeping for 0.5 hours to obtain a second dispersion; adding temperature-resistant additives and 2.5 parts by weight of modified bio-based carbon aerogel 2 into the second dispersion, continuing constant-temperature stirring for 0.5 hours, discharging and packaging to obtain the bio-based non-cured asphalt waterproof coating. Example 8

[0095] The difference from example 4 is that the heavy calcium powder in example 4 is replaced by mica powder with the same particle size. Example 9

[0096] The difference from example 4 is that the modified bio-based carbon aerogel 1 in example 4 is replaced by modified bio-based carbon aerogel 3.

[0097] Comparative example 1

[0098] The embodiment provides a non-cured asphalt waterproof coating, which comprises 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 and 0.75 parts by weight of SBR; temperature-resistant additives, 2 parts by weight; and inorganic filler, 46 parts by weight.

[0099] The comparative example also provides a preparation method of the above-mentioned non-cured asphalt waterproof coating, comprising the following steps: mixing 70# asphalt and softening oil according to a proportion, stirring the mixture at a rotating speed of 800 rpm, and heating to 140-145 DEG C and keeping for 1.5 hours until the asphalt is completely melted to obtain asphalt dispersion; adding rubber modifier SBR and SBS to the asphalt dispersion according to a proportion, and heating to 170-180 DEG C and keeping for 2.5 hours to obtain a first dispersion; adding inorganic filler to the first dispersion according to a proportion and keeping for 0.5 hours to obtain a second dispersion; adding temperature-resistant additives to the second dispersion and continuing constant-temperature stirring for 0.5 hours to obtain the non-cured asphalt waterproof coating. Comparative example 2

[0100] The embodiment provides a non-cured asphalt waterproof coating, which comprises 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 and 0.75 parts by weight of SBR; temperature-resistant additive, 1.5 parts by weight; and inorganic filler, 45.5 parts by weight. The embodiment also provides a preparation method of the non-cured asphalt waterproof coating, which comprises the following steps: mixing 70# asphalt and softening oil according to the proportion, stirring the mixture at a rotating speed of 800 rpm, heating to 140-145 DEG C and keeping the temperature for 1.5 hours until the asphalt is completely melted to obtain asphalt dispersion; adding rubber modifiers SBR and SBS into the asphalt dispersion according to the proportion, heating to 170-180 DEG C and keeping the temperature for 2.5 hours to obtain first dispersion; adding inorganic filler into the first dispersion according to the proportion and keeping the temperature for 0.5 hours to obtain second dispersion; adding temperature-resistant additive into the second dispersion and continuing to keep the temperature for 0.5 hours, discharging and packaging to obtain the non-cured asphalt waterproof coating.

[0101] Performance test

[0102] The bio-based non-cured asphalt waterproof coatings of Examples 1-8 and the non-cured asphalt waterproof coatings of Comparative Examples 1-2 are coated to form corresponding waterproof coating layers, so as to perform performance tests, and the performance test results are recorded in Table 1 below, so as to perform performance comparison.

[0103] 1, heat resistance test

[0104] The sample preparation and test are performed according to GB / T 328-2007 "Building Waterproof Material Test Method" Part 14, and the heat resistance test condition is hot air oven heat aging at 60-150 DEG C.

[0105] 2, thermal conductivity test

[0106] The thermal conductivity is detected according to GB / T22588-2008 "Flash Method for Measuring Thermal Diffusivity or Thermal Conductivity".

[0107] 3, combustion grade test

[0108] The combustion performance grade detection standard is GB50016-2006 "Building Design Fireproof Standard".

[0109] Test results

[0110] Table 1 Performance test results of bio-based non-cured waterproof asphalt coating

[0111]

[0112] It should be noted that the heat resistance test data in Table 1 refers to no sliding, flowing, dripping at the corresponding temperature. The coating layer formed by the bio-based non-curing asphalt waterproof coating of Example 1 has no sliding, flowing, dripping at 80℃. The same applies to other examples or comparative examples, which will not be repeated here.

[0113] From the components and contents of the bio-based non-curing asphalt waterproof coating of Comparative 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 Example 1-2 which does not contain the modified bio-based carbon aerogel of the present application, the thermal conductivity is larger, which is 0.085 W / (m·K); the heat resistance is poorer, which is only 68℃-70℃.

[0114] The bio-based non-curing asphalt waterproof coating of the present application can effectively reduce the thermal conductivity of the bio-based non-curing asphalt waterproof coating to 0.032W / (m·K)-0.075W / (m·K), improve the heat resistance to 70℃-80℃, and improve the low-temperature flexibility of the bio-based non-curing asphalt waterproof coating to no breakage at-22℃- -26℃, improve the elongation performance to 35%-38%, and improve the combustion grade of the bio-based non-curing asphalt waterproof coating to A grade, which is obviously improved compared with the coating performance of the comparative example.

[0115] From Comparative Example 3, Example 2 and Example 1, it can be seen that as the contents of 70# asphalt, softening oil, SBS and SBR, and modified bio-based carbon aerogel increase, and the content of inorganic filler decreases, the thermal conductivity of the bio-based non-curing asphalt waterproof coating at 25℃ gradually decreases, the heat resistance gradually weakens, but the elongation performance gradually increases.

[0116] Comparative Example 3 and Example 4, as the content of 70# asphalt increases, and the heat-resistant additives and inorganic fillers relatively decrease, the thermal conductivity of the bio-based non-curing asphalt waterproof coating at 25℃ decreases from 0.041W / (m·K) to 0.036W / (m·K), the heat resistance decreases from 75℃ to 70℃, the low-temperature flexibility increases from-25℃ to-26℃, but the elongation performance remains unchanged.

[0117] Comparative Example 3 and Example 5, as the content of modified bio-based carbon aerogel decreases 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℃ increases from 0.041W / (m·K) to 0.058W / (m·K), the heat resistance remains unchanged, the low-temperature flexibility decreases from-25℃ to-24℃, and the elongation performance decreases from 38mm to 36mm.

[0118] Comparative Example 4 and Example 5, with the content of 70# asphalt decreasing, the relative increase of heat-resistant additives and inorganic fillers, and the content of modified bio-based carbon aerogel decreasing from 2.5 parts by weight to 1.5 parts by weight, the thermal conductivity of the bio-based non-cured asphalt waterproof coating at 25°C increased from 0.035 W / (m·K) to 0.058 W / (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 38 mm to 36 mm.

[0119] Comparative Example 3 and Example 6, with the content of modified bio-based carbon aerogel decreasing from 2.5 parts by weight to 0.5 parts by weight, the thermal conductivity of the bio-based non-cured asphalt waterproof coating at 25°C increased from 0.041 W / (m·K) to 0.064 W / (m·K), the heat resistance remained unchanged, the low-temperature flexibility decreased from -25°C to -23°C, and the elongation performance decreased from 38 mm to 37 mm. It can be seen that the use of less modified bio-based carbon aerogel will cause the thermal conductivity to increase significantly, indicating that the amount of modified bio-based carbon aerogel has a more obvious effect on the thermal conductivity of the bio-based non-cured asphalt waterproof coating, thereby affecting its heat insulation performance.

[0120] Comparative Example 4 and Example 7, when the mass ratio of the coupling agent, i.e. 3- aminopropyltrimethoxysilane, in the modified bio-based carbon aerogel is further reduced from 1:1 to 1:1.4 to the biomass carbon aerogel, the thermal conductivity of the bio-based non-cured asphalt waterproof coating at 25℃ is reduced from 0.036 W / (m·K) to 0.035 W / (m·K), the change in thermal conductivity is small, indicating that the aminoalkylalkoxysilane containing an alkoxy, amino substituent group has a small effect on the modification of the biomass carbon aerogel on the thermal conductivity of the coating; but the heat resistance is increased from 70℃ to 72℃, the heat resistance is improved, and the low temperature flexibility and elongation performance remain unchanged, indicating that the modified bio-based carbon aerogel obtained by modifying the biomass carbon aerogel with the aminoalkylalkoxysilane containing an alkoxy, amino substituent group has a certain effect on the heat resistance and low temperature flexibility of the bio-based non-cured asphalt waterproof coating, but the effect is relatively small. Comparative Example 4, Example 7 and Example 9, when the mass ratio of the biomass carbon aerogel to 3-aminopropyltrimethoxysilane is further increased to 2:1, the thermal conductivity of the bio-based non-cured asphalt waterproof coating at 25℃ remains at 0.036 W / (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, which may be due to insufficient modification of the biomass carbon aerogel, reducing the compatibility of the biomass carbon aerogel and the asphalt coating, but its overall performance is still higher than that of Comparative Examples 1 and 2. The above data prove that when the biomass carbon aerogel and the aminoalkylalkoxysilane are kept within a suitable range, the overall performance of the bio-based non-cured asphalt waterproof coating is better.

[0121] Comparative Example 4 and Example 8, when the filler in the bio-based non-cured asphalt waterproof coating is replaced by mica powder of the corresponding particle size instead of heavy calcium powder, its thermal conductivity at 25℃ is lower, reaching 0.032 W / (m·K), the bonding performance and elongation are qualified, the heat resistance is improved from 38℃ to 39℃, the low temperature flexibility remains unchanged, but the elongation is improved from 38mm to 39mm, indicating that the combination of mica powder as a filler with modified bio-based carbon aerogel can further improve the thermal insulation performance of the bio-based non-cured asphalt waterproof coating, which may be due to the poor thermal conductivity of mica powder and the layered structure of mica, which can better prevent heat transfer.

[0122] The above merely describes specific implementation manners of the present application, and those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes described above can refer to the corresponding processes in the foregoing method embodiments, which will not be described herein again. It should be understood that the protection scope of the present application is not limited to this, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be encompassed in the protection scope of the present application.

Claims

1. A bio-based non-curing bituminous waterproofing coating, characterized in that, By weight, including the following components: 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; Temperature resistance aid, 1.5 parts by weight to 2.5 parts by weight; Inorganic filler, 45 parts by weight to 54 parts by weight; and Modified biomass-based carbon aerogel, 0.455 parts by weight to 2.75 parts by weight; The modified biomass-based carbon aerogel is modified by aminoalkyl alkoxysilane on biomass carbon aerogel, including: mixing biomass carbon aerogel and aminoalkyl alkoxysilane according to a mass ratio of 1: (0.5-1.5) to obtain a first mixed solution; adding 0.01%-0.05% of concentrated sulfuric acid based on the total mass of the first mixed solution to the first mixed solution, and preparing the modified biomass-based carbon aerogel at 120°C-130°C and -80 to -90 KPa.

2. The bio-based non-curing bituminous waterproofing coating according to claim 1, characterized in that, Meet one or more of the following conditions: The aminoalkyl alkoxysilane contains C1-C8 alkyl substituted with amino; The penetration of the asphalt is 60-210, unit: 1 / 10 mm; The softening oil is one or a combination of several of cycloalkane oil, aromatic oil, mineral oil and waste engine oil.

3. The bio-based non-curing bituminous waterproofing coating according to claim 1, characterized in that, Meet one or more of the following conditions: The aminoalkyl alkoxysilane is selected from one or more of a combination 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; The rubber modifier includes one or a combination of several of butadiene-styrene-butadiene triblock copolymer, styrene-butadiene rubber and styrene-isoprene-styrene triblock copolymer.

4. The bio-based non-curing bituminous waterproofing coating according to claim 3, characterized in that, The butadiene-styrene-butadiene triblock copolymer is of star structure and has a molecular weight of 150000-450000, wherein the mass content of the styrene segment is 20%-30%; The molecular weight of the styrene-butadiene rubber is 100000-250000; The molecular weight of the styrene-isoprene-styrene triblock copolymer is 70000-150000, wherein the mass content of the isoprene segment is 25%-35%.

5. The bio-based non-curing bituminous waterproofing coating according to claim 1, characterized in that, The temperature resistance aid is one or a combination of several of wax powder, ethylene glycol diacrylate and 2-propyl acrylate; The inorganic filler includes one or a combination of several of heavy calcium, talc powder, mica powder, kaolin, perlite and ceramic powder; The average particle size of the inorganic filler is 200-1000 mesh.

6. A process for the preparation of a bio-based non-curing bituminous waterproofing coating according to any one of claims 1 to 5, characterized in that, Including: Providing modified biomass-based carbon aerogel; Mixing and melting asphalt and softening oil to obtain asphalt dispersion; Adding rubber modifier to the asphalt dispersion and heating to 170°C-180°C for heat treatment to obtain a first dispersion; Adding inorganic filler dispersion to the first dispersion to obtain a second dispersion; The temperature-resistant assistant and the modified bio-based carbon aerogel dispersion are added into the second dispersion to obtain a non-cured asphalt waterproof coating.

7. The preparation method according to claim 6, characterized in that, The modified bio-based carbon aerogel is provided, including: The wood material and water are dispersed according to a preset ratio and are subjected 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; The biomass carbon aerogel is modified using an aminoalkyl alkoxysilane, and the mass ratio of the biomass carbon aerogel to the aminoalkyl alkoxysilane is 1: (0.5-1.5) to obtain a modified bio-based carbon aerogel.

8. The preparation method of claim 7, wherein, The wood material and water are dispersed according to a preset ratio and are subjected to hydrothermal treatment, including: The wood material and water are dispersed 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 treatment at 180-200°C, and 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 using an alcohol solvent and is subjected to drying treatment, including: The modified biomass gel is washed using an alcohol solvent for multiple times to replace the moisture in the modified biomass gel; The modified biomass gel with the removed moisture is subjected to freeze-drying at -20- -10°C to obtain a biomass carbon aerogel.

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

10. The method of any one of claims 7-9, wherein, The aminoalkyl alkoxysilane 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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