Root-resistant and mildew-resistant waterproofing membrane and preparation method thereof

Abstract

The application discloses a kind of root penetration resistant mildew resistant waterproofing membrane and preparation method thereof, belong to waterproof technical field, including copper foil layer, the upper and lower surfaces of copper foil layer are equipped with pitch coating, pitch coating is made of modified pitch, the upper and lower surfaces of pitch coating are adhered with isolation film;Select copper foil as middle layer, copper has the effect of preventing bacteria from growing on its surface, improve the service life of waterproofing membrane, resist the destructive effect of plant root system, and cooperate with the modified graphene oxide in modified pitch to improve the root penetration resistance effect.Preparation raw material of pitch coating, styrene-butadiene-styrene block copolymer is added in raw material, and a continuous and cross network structure is formed between the polymer of raw material, and modified graphene oxide is introduced, to further form a multi-layer structure "protective layer", hinder the impregnation of corrosive medium, the mutual cooperation of the materials in pitch coating is more conducive to improve the chemical corrosion resistance of material.

Description

Technical Field

[0001] This invention belongs to the field of waterproofing technology, specifically relating to a root-penetration-resistant and mildew-resistant waterproof membrane and its preparation method. Background Technology

[0002] A green roof is a roof system consisting of green plants as the main covering, supplemented by a nutrient soil layer, a water storage layer, and a plant root barrier layer, a drainage layer, a waterproof layer, and an insulation layer. It has functions such as saving land, saving energy, reducing dust and noise, increasing urban green coverage, reducing the heat island effect, improving the living environment, collecting and delaying rainwater discharge, and extending the life of the roof system.

[0003] The effective lifespan of a green roof depends to some extent on the construction of the waterproofing layer and the selection of root-penetration-resistant waterproofing materials. CN103524947A discloses an enhanced root-penetration-resistant waterproofing membrane and its production process, which prevents plant roots from penetrating by adding chemical root inhibitors to the raw materials. However, the root inhibitors can be wasted due to leakage from the root-blocking material caused by external conditions and molecular movement, and may even cause environmental problems. Its performance needs to be further improved. Summary of the Invention

[0004] The purpose of this invention is to provide a root-penetration-resistant and mildew-resistant waterproof membrane and its preparation method, so as to solve the problems in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A root-penetration-resistant and mildew-resistant waterproof membrane includes a copper foil layer, with an asphalt coating on both the upper and lower surfaces of the copper foil layer. The asphalt coating is made of modified asphalt, and a release film is attached to both the upper and lower surfaces of the asphalt coating.

[0007] The modified asphalt comprises the following raw materials in parts by weight:

[0008] 80-95 parts asphalt, 8-10 parts naphthenic oil, 6-8 parts styrene-butadiene-styrene block copolymer, 5-8 parts powdered styrene-butadiene rubber, 4-6 parts modified graphene oxide, 5-7 parts modified talc, and 3-5 parts antioxidant;

[0009] The modified graphene oxide is prepared through the following steps:

[0010] Step 1: Ethyl 2-(4-chloro-2-methylphenoxy)propionate, 1,4-butanediol and catalyst were mixed and heated under reflux at 120°C for 6 hours. After the reaction was completed, the mixture was cooled to room temperature. The resulting reaction solution was then extracted with dichloromethane and deionized water. The resulting organic phase was dried with anhydrous sodium sulfate. After drying, the mixture was concentrated under reduced pressure to obtain the root inhibitor component.

[0011] The second step involves adding the root inhibitor component to a dispersion containing cyanate-modified graphene under nitrogen protection. The temperature is set at 80°C, and the mixture is stirred for 20 hours. After the reaction is completed, the mixture is cooled to room temperature. The resulting reaction solution is precipitated with acetone, and the precipitate is dried to constant weight under vacuum at 80°C to obtain modified graphene oxide.

[0012] In this invention, modified graphene oxide is selected to improve product performance. The modified graphene oxide is obtained by reacting a root inhibitor component with cyanate-modified graphene. The root inhibitor component undergoes appropriate chemical modification on the surface of the cyanate-modified graphene, enabling good dispersion of the modified graphene oxide in the material. The root inhibitor component belongs to the 2-(4-chloro-2-methylphenoxy)propionic acid derivative class and has the effect of inhibiting primary root growth. The root inhibitor component combines with graphene oxide through a grafting reaction, not only solving its own easy migration and failure problem, but also further improving root penetration resistance in conjunction with the copper foil layer in the waterproof membrane of this invention. In the first step, the molar ratio of ethyl 2-(4-chloro-2-methylphenoxy)propionate to 1,4-butanediol is 1:1; the amount of catalyst is 4% of the mass of ethyl 2-(4-chloro-2-methylphenoxy)propionate; in the second step, the ratio of the root inhibitor component to the dispersion of cyanate-modified graphene is 0.1g:30mL.

[0013] Furthermore, the catalyst is one of trifluoromethanesulfonic acid and p-toluenesulfonic acid.

[0014] Furthermore, the dispersion of cyanate-modified graphene is prepared by the following steps:

[0015] Graphene oxide, diisocyanate, and N,N-dimethylformamide were mixed and reacted under nitrogen protection for 24 h to obtain a dispersion containing cyanate-modified graphene. The ratio of graphene oxide, diisocyanate, and N,N-dimethylformamide was 1 g: 0.17-0.25 g: 30 mL.

[0016] Furthermore, the diisocyanate is one of hexamethylene diisocyanate and diphenylmethane diisocyanate.

[0017] Furthermore, the asphalt is a mixture of 90# road asphalt, 70# road asphalt and 100# road asphalt in a mass ratio of 4:3:1; the antioxidant is antioxidant 1010.

[0018] Furthermore, the modified talc powder is prepared through the following steps:

[0019] γ-glycidyl etheroxypropyltrimethoxysilane and anhydrous ethanol were mixed and pre-dispersed for 30 min, then talc powder was added and mixed at high speed at 100 Hz for 30 min. The mixture was then removed and dried at 120 °C for 2 h to obtain pre-dispersed modified talc powder.

[0020] Pre-dispersed modified talc powder was added to a ball mill, and 2,4,6-tris(4-hydroxyphenyl)triazine was added at 80℃. The mixture was then ground for another 30 minutes to obtain modified talc powder. The ratio of γ-glycidoxypropyltrimethoxysilane, anhydrous ethanol, and talc powder was 2 g:100 mL:5 g; the mass ratio of pre-dispersed modified talc powder to 2,4,6-tris(4-hydroxyphenyl)triazine was 10:1.

[0021] Talc powder is an inorganic particle with a layered structure, which is prone to agglomeration when mixed with raw materials. Its hydrophilic surface reduces compatibility. In this invention, a conventional silane coupling agent is selected for pre-dispersion modification, followed by ball milling with 2,4,6-tris(4-hydroxyphenyl)triazine, which increases the number of phenolic hydroxyl and amino groups.

[0022] Furthermore, the separator is either a PE film or a PET film; the copper foil used in the copper foil layer has a thickness of 0.07 mm.

[0023] Furthermore, the thickness of the asphalt coating is 2.5 ± 0.2 mm.

[0024] A method for preparing a root-penetration-resistant and mildew-resistant waterproof membrane includes the following steps:

[0025] Step 1: Weigh the raw materials of modified asphalt according to the weight parts, put the weighed raw materials into a mixer and mix them evenly to obtain the mixture;

[0026] The second step involves extruding the mixture through an extruder and then pressing it into shape using a mold. The resulting material and copper foil layer are then rolled together using a rolling mill. After cooling, an asphalt coating is formed. Finally, a release liner is attached to the surface of the asphalt coating to obtain a root-penetration-resistant and mildew-resistant waterproof membrane.

[0027] Furthermore, the mixing temperature in the first step is 90-95℃; the extrusion temperature in the second step is controlled as follows: Zone 1 140±5℃, Zone 2 145±5℃, Zone 3 150±5℃, Zone 4 155±5℃, and Zone 5 165±5℃.

[0028] The beneficial effects of this invention are:

[0029] This invention discloses a root-penetration-resistant and mildew-resistant waterproof membrane in which copper foil is selected as the intermediate layer. Copper has the function of preventing bacteria from growing on its surface, reducing or avoiding the organic acids, enzymes or other secretions produced by mold on the material, and improving the service life of the waterproof membrane. The use of metal materials (i.e., copper foil) to resist the destructive effect of plant roots, and the use of modified graphene oxide in modified bitumen to improve the root-penetration resistance effect.

[0030] In this invention, by treating talc powder, the cross-linking strength of modified talc powder and carboxyl groups in asphalt is improved, the interfacial bonding force between modified talc powder and asphalt system is enhanced, and the impact resistance of the product is strengthened; moreover, the better the dispersion effect, combined with its own lamellar structure, the more uniformly the dispersion is arranged, thus improving the stability.

[0031] To address the performance issues of copper foil in waterproof membranes, this invention adjusts the raw materials for preparing the asphalt coating. Styrene-butadiene-styrene block copolymer (SBS) is added to the raw materials. SBS is transformed into tiny particles that are uniformly dispersed in the asphalt, forming a continuous and intersecting network structure with the polymers in the raw materials. Modified graphene oxide is also introduced to further form a multi-layered "protective layer," hindering the penetration of corrosive media. The synergistic effect of the materials in the asphalt coating further enhances the material's resistance to chemical corrosion.

[0032] The roll material prepared by this invention has strong adaptability to base shrinkage, deformation and cracking, excellent high and low temperature resistance, adaptability to both hot and cold regions, and good corrosion resistance, mildew resistance and weather resistance. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] Preparation of ethyl 2-(4-chloro-2-methylphenoxy)propionate:

[0035] 0.15 mol of 4-chloro-2-methylphenol, 0.15 mol of sodium hydroxide, and 100 mL of N,N-dimethylformamide were mixed and stirred at 20 °C for 1 h to obtain a mixture. Then, 0.12 mol of ethyl 2-(toluenesulfonyloxy)propionate and 30 mL of N,N-dimethylformamide were mixed and added dropwise to the above mixture. The temperature was kept constant and the reaction was continued with stirring. The reaction progress was monitored by TLC. After the reaction was completed, saturated brine was added and stirred for 3 min. The mixture was extracted three times with dichloromethane, and the organic phases were combined. The organic phase was then washed five times with saturated brine, dried with anhydrous sodium sulfate, filtered, concentrated under reduced pressure, and purified by column chromatography to obtain ethyl 2-(4-chloro-2-methylphenoxy)propionate.

[0036] Example 1

[0037] This embodiment provides a modified graphene oxide, prepared through the following steps:

[0038] Step 1: Ethyl 2-(4-chloro-2-methylphenoxy)propionate, 1,4-butanediol, and trifluoromethanesulfonic acid were mixed and refluxed at 120°C for 6 hours. After the reaction was completed, the mixture was cooled to room temperature, and the resulting reaction solution was extracted with dichloromethane and deionized water. The resulting organic phase was dried with anhydrous sodium sulfate, and after drying, it was concentrated under reduced pressure to obtain the root inhibitor component. The molar ratio of ethyl 2-(4-chloro-2-methylphenoxy)propionate to 1,4-butanediol was 1:1; the amount of trifluoromethanesulfonic acid was 4% of the mass of ethyl 2-(4-chloro-2-methylphenoxy)propionate.

[0039] The second step involves mixing graphene oxide, hexamethylene diisocyanate, and N,N-dimethylformamide, and stirring the mixture under nitrogen protection for 24 hours to obtain a dispersion containing graphene modified with cyanate ester. The ratio of graphene oxide, hexamethylene diisocyanate, and N,N-dimethylformamide is 1 g: 0.17 g: 30 mL.

[0040] Under nitrogen protection, the root inhibitor component was added to a dispersion containing cyanate-modified graphene. The temperature was set at 80℃, and the mixture was stirred for 20 hours. After the reaction was completed, the mixture was cooled to room temperature. The resulting reaction solution was precipitated with acetone, and the precipitate was dried to constant weight at 80℃ under vacuum to obtain modified graphene oxide. The ratio of the root inhibitor component to the cyanate-modified graphene dispersion was 0.1 g: 30 mL.

[0041] Example 2

[0042] This embodiment provides a modified graphene oxide, prepared through the following steps:

[0043] Step 1: Ethyl 2-(4-chloro-2-methylphenoxy)propionate, 1,4-butanediol, and p-toluenesulfonic acid were mixed and refluxed at 120°C for 6 hours. After the reaction was completed, the mixture was cooled to room temperature, and the resulting reaction solution was extracted with dichloromethane and deionized water. The resulting organic phase was dried with anhydrous sodium sulfate, and after drying, it was concentrated under reduced pressure to obtain the root inhibitor component. The molar ratio of ethyl 2-(4-chloro-2-methylphenoxy)propionate to 1,4-butanediol was 1:1; the amount of p-toluenesulfonic acid was 4% of the mass of ethyl 2-(4-chloro-2-methylphenoxy)propionate.

[0044] The second step involves mixing graphene oxide, diphenylmethane diisocyanate, and N,N-dimethylformamide, and stirring the mixture under nitrogen protection for 24 hours to obtain a dispersion containing graphene modified with cyanate ester. The ratio of graphene oxide, diphenylmethane diisocyanate, and N,N-dimethylformamide is 1 g: 0.25 g: 30 mL.

[0045] Under nitrogen protection, the root inhibitor component was added to a dispersion containing cyanate-modified graphene. The temperature was set at 80℃, and the mixture was stirred for 20 hours. After the reaction was completed, the mixture was cooled to room temperature. The resulting reaction solution was precipitated with acetone, and the precipitate was dried to constant weight at 80℃ under vacuum to obtain modified graphene oxide. The ratio of the root inhibitor component to the cyanate-modified graphene dispersion was 0.1 g: 30 mL.

[0046] Example 3

[0047] Modified talc powder is prepared through the following steps:

[0048] γ-glycidyl etheroxypropyltrimethoxysilane and anhydrous ethanol were mixed and pre-dispersed for 30 min, then talc powder was added and mixed at high speed at 100 Hz for 30 min. The mixture was then removed and dried at 120 °C for 2 h to obtain pre-dispersed modified talc powder.

[0049] Pre-dispersed modified talc powder was added to a ball mill, and 2,4,6-tris(4-hydroxyphenyl)triazine was added at 80℃. The mixture was then ground for another 30 minutes to obtain modified talc powder. The ratio of γ-glycidoxypropyltrimethoxysilane, anhydrous ethanol, and talc powder was 2 g:100 mL:5 g; the mass ratio of pre-dispersed modified talc powder to 2,4,6-tris(4-hydroxyphenyl)triazine was 10:1.

[0050] Example 4

[0051] A root-penetration-resistant and mildew-resistant waterproof membrane includes a copper foil layer, with an asphalt coating on both the upper and lower surfaces of the copper foil layer. The asphalt coating is made of modified asphalt, and a release film is adhered to both the upper and lower surfaces of the asphalt coating. The copper foil used in the copper foil layer has a thickness of 0.07 mm. The release film is a PET film.

[0052] A method for preparing a root-penetration-resistant and mildew-resistant waterproof membrane includes the following steps:

[0053] Step 1: Weigh the raw materials for the modified asphalt according to the weight parts. Weigh 8 parts of asphalt, 8 parts of naphthenic oil, 6 parts of styrene-butadiene-styrene block copolymer, 5 parts of powdered styrene-butadiene rubber, 4 parts of modified graphene oxide prepared in Example 1, 5 parts of modified talc powder prepared in Example 3, and 3 parts of antioxidant 1010; put them into a mixer and mix evenly at a mixing temperature of 90°C; to obtain a mixture; the asphalt is a mixture of 90# road asphalt, 70# road asphalt, and 100# road asphalt in a mass ratio of 4:3:1.

[0054] The second step involves extruding the mixture through an extruder and then pressing it into shape using a die. The resulting material, along with a copper foil layer, is then rolled and shaped using a rolling mill. After cooling, an asphalt coating is formed. Finally, a release liner is bonded to the surface of the asphalt coating to obtain a root-penetration-resistant, mildew-resistant, and waterproof membrane. The asphalt coating thickness is 2.5±0.2mm; the extrusion temperature is controlled as follows: Zone 1: 140±5℃, Zone 2: 145±5℃, Zone 3: 150±5℃, Zone 4: 155±5℃, and Zone 5: 165±5℃.

[0055] Example 5

[0056] A root-penetration-resistant and mildew-resistant waterproof membrane includes a copper foil layer, with an asphalt coating on both the upper and lower surfaces of the copper foil layer. The asphalt coating is made of modified asphalt, and a release film is adhered to both the upper and lower surfaces of the asphalt coating. The copper foil used in the copper foil layer has a thickness of 0.07 mm. The release film is a PE film.

[0057] A method for preparing a root-penetration-resistant and mildew-resistant waterproof membrane includes the following steps:

[0058] Step 1: Weigh the raw materials for the modified asphalt according to the weight parts. Weigh 90 parts of asphalt, 9 parts of naphthenic oil, 7 parts of styrene-butadiene-styrene block copolymer, 7 parts of powdered styrene-butadiene rubber, 5 parts of modified graphene oxide prepared in Example 2, 6 parts of modified talc powder prepared in Example 3, and 4 parts of antioxidant 1010; put them into a mixer and mix evenly at a mixing temperature of 95°C; to obtain a mixture; the asphalt is a mixture of 90# road asphalt, 70# road asphalt, and 100# road asphalt in a mass ratio of 4:3:1.

[0059] The second step involves extruding the mixture through an extruder and then pressing it into shape using a die. The resulting material, along with a copper foil layer, is then rolled and shaped using a rolling mill. After cooling, an asphalt coating is formed. Finally, a release liner is bonded to the surface of the asphalt coating to obtain a root-penetration-resistant, mildew-resistant, and waterproof membrane. The asphalt coating thickness is 2.5±0.2mm; the extrusion temperature is controlled as follows: Zone 1: 140±5℃, Zone 2: 145±5℃, Zone 3: 150±5℃, Zone 4: 155±5℃, and Zone 5: 165±5℃.

[0060] Example 6

[0061] A root-penetration-resistant and mildew-resistant waterproof membrane includes a copper foil layer, with an asphalt coating on both the upper and lower surfaces of the copper foil layer. The asphalt coating is made of modified asphalt, and a release film is adhered to both the upper and lower surfaces of the asphalt coating. The copper foil used in the copper foil layer has a thickness of 0.07 mm. The release film is a PE film.

[0062] A method for preparing a root-penetration-resistant and mildew-resistant waterproof membrane includes the following steps:

[0063] Step 1: Weigh the raw materials for the modified asphalt according to the weight parts. 95 parts of asphalt, 10 parts of naphthenic oil, 8 parts of styrene-butadiene-styrene block copolymer, 8 parts of powdered styrene-butadiene rubber, 6 parts of modified graphene oxide prepared in Example 2, 7 parts of modified talc powder prepared in Example 3, and 5 parts of antioxidant 1010 are placed in a mixer and mixed evenly at a mixing temperature of 95°C to obtain the mixture. The asphalt is a mixture of 90# road asphalt, 70# road asphalt, and 100# road asphalt in a mass ratio of 4:3:1.

[0064] The second step involves extruding the mixture through an extruder and then pressing it into shape using a die. The resulting material, along with a copper foil layer, is then rolled and shaped using a rolling mill. After cooling, an asphalt coating is formed. Finally, a release liner is bonded to the surface of the asphalt coating to obtain a root-penetration-resistant, mildew-resistant, and waterproof membrane. The asphalt coating thickness is 2.5±0.2mm; the extrusion temperature is controlled as follows: Zone 1: 140±5℃, Zone 2: 145±5℃, Zone 3: 150±5℃, Zone 4: 155±5℃, and Zone 5: 165±5℃.

[0065] Comparative Example 1

[0066] Compared with Example 6, the modified graphene oxide was replaced with graphene oxide and ethyl 2-(4-chloro-2-methylphenoxy)propionate, and the mass ratio of graphene oxide to ethyl 2-(4-chloro-2-methylphenoxy)propionate was 5:1; the remaining raw materials and preparation process remained the same as in Example 6.

[0067] Comparative Example 2

[0068] Compared with Example 1, the modified talc powder was replaced with untreated talc powder, while the other raw materials and preparation process remained the same as those in Comparative Example 1.

[0069] Performance tests were conducted on Examples 4-6 and Comparative Examples 1-2. Waterproofing performance was tested according to the test methods of the national standard GB 18242-2008 "Elastomer Modified Bituminous Waterproofing Membranes". Root barrier performance was tested using the method specified in JC / T1075-2008 "Root-Penetration Resistant Waterproofing Membranes for Green Roofs" to examine whether plant roots penetrate the membrane. The plants were cultivated in professional planting boxes, and the overall penetration effect of different common shrub roots on the material was observed after 2 years. The results are shown in Table 1.

[0070] Table 1

[0071]

[0072] As can be seen from Table 1, the root-penetration-resistant and mildew-resistant waterproof membrane prepared by the present invention has good high and low temperature resistance, good root-penetration resistance, and the treated graphene oxide and talc powder have an improving effect on the overall performance of the material.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0074] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A root-penetration-resistant and mildew-resistant waterproof membrane, characterized in that, It includes a copper foil layer, both the upper and lower surfaces of which are coated with asphalt. The asphalt coating is made of modified asphalt, and both the upper and lower surfaces of the asphalt coating are covered with a release film. The modified asphalt comprises the following raw materials in parts by weight: 80-95 parts asphalt, 8-10 parts naphthenic oil, 6-8 parts styrene-butadiene-styrene block copolymer, 5-8 parts powdered styrene-butadiene rubber, 4-6 parts modified graphene oxide, 5-7 parts modified talc, and 3-5 parts antioxidant; The modified graphene oxide is prepared through the following steps: Step 1: Ethyl 2-(4-chloro-2-methylphenoxy)propionate, 1,4-butanediol and catalyst were mixed and heated under reflux at 120°C for 6 hours. After the reaction was completed, the mixture was cooled to room temperature. The resulting reaction solution was then extracted with dichloromethane and deionized water. The resulting organic phase was dried with anhydrous sodium sulfate. After drying, the mixture was concentrated under reduced pressure to obtain the root inhibitor component. The second step involves adding the root inhibitor component to a dispersion containing cyanate-modified graphene under nitrogen protection, setting the temperature to 80°C, stirring for 20 hours, cooling to room temperature after the reaction, precipitating the resulting reaction solution with acetone, and drying the precipitate at 80°C under vacuum to constant weight to obtain modified graphene oxide. The modified talc powder is prepared through the following steps: γ-glycidyl etheroxypropyltrimethoxysilane and anhydrous ethanol were mixed and pre-dispersed for 30 min, then talc powder was added and mixed at high speed at 100 Hz for 30 min. The mixture was then removed and dried at 120 °C for 2 h to obtain pre-dispersed modified talc powder. Pre-dispersed modified talc powder was added to a ball mill, and 2,4,6-tris(4-hydroxyphenyl)triazine was added at 80°C. The mixture was then kept warm and ground for 30 minutes to obtain modified talc powder.

2. The root-penetration-resistant and mildew-resistant waterproof membrane according to claim 1, characterized in that, The catalyst is one of trifluoromethanesulfonic acid and p-toluenesulfonic acid.

3. The root-penetration-resistant and mildew-resistant waterproof membrane according to claim 1, characterized in that, The dispersion of cyanate ester-modified graphene was prepared by the following steps: Graphene oxide, diisocyanate, and N,N-dimethylformamide were mixed and stirred under nitrogen protection for 24 hours to obtain a dispersion containing cyanate-modified graphene.

4. The root-penetration-resistant and mildew-resistant waterproof membrane according to claim 3, characterized in that, Diisocyanate is one of hexamethylene diisocyanate and diphenylmethane diisocyanate.

5. The root-penetration-resistant and mildew-resistant waterproof membrane according to claim 1, characterized in that, The asphalt is a mixture of 90# road asphalt, 70# road asphalt and 100# road asphalt in a mass ratio of 4:3:1; the antioxidant is antioxidant 1010.

6. The root-penetration-resistant and mildew-resistant waterproof membrane according to claim 1, characterized in that, The separating membrane is either a PE membrane or a PET membrane.

7. The root-penetration-resistant and mildew-resistant waterproof membrane according to claim 1, characterized in that, The thickness of the asphalt coating is 2.5 ± 0.2 mm.

8. The method for preparing a root-penetration-resistant and mildew-resistant waterproof membrane according to claim 1, characterized in that, Includes the following steps: Step 1: Weigh the raw materials of modified asphalt according to the weight parts, put the weighed raw materials into a mixer and mix them evenly to obtain the mixture; The second step involves extruding the mixture through an extruder and then pressing it into shape using a mold. The resulting material and copper foil layer are then rolled together using a rolling mill. After cooling, an asphalt coating is formed. Finally, a release liner is attached to the surface of the asphalt coating to obtain a root-penetration-resistant and mildew-resistant waterproof membrane.

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