Waterproof thermal insulation material based on biomass polyester tire base and preparation method thereof

Abstract

The application discloses a waterproof thermal insulation material based on a biomass polyester base and a preparation method thereof, and relates to the field of building waterproofing. The application comprises a waterproof thermal insulation material based on a biomass polyester base, characterized in that the biomass polyester base is doped with SiO2 aerogel and has a fluorocarbon film deposited on the surface, glass fibers are coated in the biomass polyester base, and an isolation layer is adhered to the surface of the biomass polyester base. The application solves the problems that the traditional building waterproofing material has a single function and does not have the characteristics of green environmental protection, and the SiO2 aerogel has excellent heat insulation and thermal insulation performance, but has low mechanical strength and is difficult to meet the application requirements in multiple scenes.

Description

Technical Field

[0001] This invention relates to the field of building waterproofing, specifically to a waterproof and thermal insulation material based on biomass polyester substrate and its preparation method. Background Technology

[0002] With the increasing prominence of global warming and environmental problems, traditional petroleum-based polymer materials, due to their non-renewable and non-degradable characteristics, have placed a heavy burden on the environment. Bio-based polyester, as a novel polymer material derived from renewable biomass resources, not only possesses the environmental advantages of being degradable and renewable, but also demonstrates enormous application potential in the field of waterproof and thermal insulation materials due to its structural adjustability and diversity.

[0003] Adding modified SiO2 aerogel to bio-based polyester is an effective way to improve the waterproof and thermal insulation performance of the material. SiO2 aerogel is a porous nanomaterial with a high specific surface area, possessing excellent thermal insulation properties and a low thermal conductivity. Through specific chemical modification methods, such as surface grafting and chemical crosslinking, SiO2 aerogel can be effectively combined with bio-based polyester to form a uniformly dispersed composite system. This composite material not only maintains the environmental friendliness and biodegradability of bio-based polyester, but also greatly improves the waterproof and thermal insulation performance of the material due to its internal nanoscale porous structure.

[0004] Furthermore, to enhance the waterproofness and durability of the composite material, fluorocarbon membrane technology was introduced into the bio-based polyester / modified SiO2 aerogel composite system. Fluorocarbon membrane is a polymer coating material with excellent waterproofness and weather resistance, widely used in construction, aerospace, and other fields. By covering the surface of the composite material with a dense fluorocarbon membrane, the penetration of moisture and corrosive substances can be effectively prevented, thereby significantly improving the material's waterproof performance and long-term stability.

[0005] In summary, the technological background for preparing waterproof and thermal insulation materials by adding modified SiO2 aerogel to bio-based polyester and coating it with a fluorocarbon film is based on multiple demands for environmental protection, sustainable development, and performance optimization. The research and application of this technology can not only bring innovative solutions to the field of waterproof and thermal insulation materials, but also promote the green development and industrial upgrading of the bio-based polymer materials industry. With continuous technological advancements and market expansion, this technology will demonstrate even broader application prospects in the future. Summary of the Invention

[0006] The purpose of this invention is to provide a waterproof and thermal insulation material based on biomass polyester substrate and its preparation method, which solves the problems that traditional building waterproof materials have relatively single functions and do not have green and environmentally friendly characteristics; although SiO2 aerogel has excellent thermal insulation performance, its mechanical strength is low and it is difficult to meet the needs of multiple application scenarios.

[0007] To solve the above problems, the present invention employs the following technical means: First, a waterproof and thermal insulation material based on biomass polyester substrate includes a biomass polyester substrate doped with SiO2 aerogel and having a fluorocarbon film deposited on its surface, wherein glass fiber is coated in the biomass polyester substrate and an isolation layer is adhered to the surface of the biomass polyester substrate.

[0008] In this method, SiO2 aerogel is used as a heat insulation reinforcing filler and introduced into bio-based polyester. Due to its high porosity, the structure of the bio-based polyester / modified SiO2 aerogel composite system changes. Gas molecules in the pores of the system cannot flow freely due to the pore size limitation, forming a "quasi-vacuum" state, which effectively eliminates the convective heat transfer path. This results in a significant reduction in the thermal conductivity of the bio-based polyester / modified SiO2 aerogel composite system, thus enabling the waterproof and heat-insulating material to have excellent heat insulation effect.

[0009] Moreover, SiO2 aerogel can withstand high temperatures, does not burn, and can withstand direct flame burning for a long time. Its introduction into bio-based polyester also greatly increases the heat resistance of the bio-based polyester / modified SiO2 aerogel composite system, thereby increasing the safety and stability of waterproof and heat-insulating materials in high-temperature environments.

[0010] Moreover, the addition of SiO2 aerogel can effectively reduce the weight of waterproof and thermal insulation materials, which helps to reduce the self-weight load of buildings.

[0011] Furthermore, by coating glass fiber into a biomass polyester substrate, the mechanical properties of the waterproof and heat-insulating material can be improved by utilizing its own characteristics.

[0012] After the fluorocarbon film is deposited, the waterproof and heat-insulating material acquires excellent acid and alkali resistance and corrosion resistance, effectively preventing the passage of water vapor and toxic gases, thus achieving a waterproof effect. The fluorocarbon film covering the bio-based polyester with added SiO2 aerogel significantly improves the material's waterproof performance.

[0013] Furthermore, the biomass polyester substrate is polyethylene furanate, and the isolation layer is PE isolation material.

[0014] In this way, by using polyethylene furanate as the biomass polyester substrate, glass fibers can be inserted into the entanglement positions of the polymer chain segments of polyethylene furanate, allowing some of the SiO2 aerogel to be embedded within the chain segments, thereby enhancing the bonding performance between SiO2 and the substrate.

[0015] Furthermore, regarding the preparation of the aforementioned waterproof and thermal insulation material based on biomass polyester substrate, this invention also discloses a method for preparing the aforementioned waterproof and thermal insulation material based on biomass polyester substrate, comprising: S100. Preparation of glass fiber reinforced bio-based polyester matrix and modified SiO2; S200. The modified SiO2 aerogel is added to the bio-based polyester matrix to form a substrate; S300. A fluorocarbon film is deposited on the surface of the substrate to form a substrate using plasma-enhanced chemical vapor deposition. S400. Adhere a release material to the surface of a substrate.

[0016] In this method, the modified SiO2 aerogel is added to the bio-based polyester matrix, which allows the SiO2 filler to be connected to the polyester matrix through chemical bonds. Moreover, with the addition of glass fibers, the glass fibers can separate some of the entangled chain segments in the bio-based polyester matrix during the SiO2 addition process, thereby allowing SiO2 to be embedded into the chain segments. This further enhances the bonding force between SiO2 and the matrix, effectively avoiding the problem of filler separation and affecting the stability of the material after long-term use.

[0017] Moreover, by adding modified SiO2 and combining it with glass fiber, the mechanical properties of the filler can be effectively avoided due to the decrease in material density caused by the addition of filler.

[0018] Furthermore, by using plasma-enhanced chemical vapor deposition to composite fluorocarbon films with the substrate, a uniform and dense fluorocarbon film can be deposited on the substrate surface.

[0019] Furthermore, S100 includes S110. Mix monomer FDCA with EG, use tetrabutyl titanate as catalyst and triphenyl phosphite as antioxidant to carry out esterification reaction to obtain polyethylene furanate. S120. Activation treatment of glass fiber; S130. The activated glass fiber is blended with molten polyethylene furanate to obtain a glass fiber reinforced bio-based polyester matrix; S140. SiO2 aerogel powder is mixed with KH-550 in an anhydrous ethanol environment and dried to obtain modified SiO2.

[0020] S112. In a vacuum environment, the prepolymer is stirred at 200~220℃ at a speed of 150~250r / min to carry out prepolymerization; S113. After the pre-polymerization is completed, the polymerization reaction continues under vacuum at a stirring speed of 400~500 r / min until the reaction is completed; S114. Using a phenol / tetrachloroethane mixed solution as a solvent, methanol is used to purify the condensation product, polyethylene furanate.

[0021] Furthermore, S120 includes S121. Surface activation of glass fibers is performed by acid etching; In the process of surface activation, in addition to generating conventional Si-OH bonds on the surface, some of the Si-OH groups on the surface are converted into sulfonic acid groups (-SO3H) through oxidation, which then form hydrogen bonds or covalent bonds with the ester groups or hydroxyl groups in the polyester matrix, thereby enhancing the interfacial bonding.

[0022] S122. The glass fiber is soaked in a silane coupling agent, the liquid is wiped dry after soaking, and then cured.

[0023] Furthermore, in S200, the modified SiO2 aerogel is blended with the bio-based polyester matrix at a temperature of 210~230°C.

[0024] Furthermore, S300 includes S310. The substrate is placed into a vacuum chamber for plasma cleaning; S320. Chemical vapor deposition is performed on the substrate in a vacuum chamber using CF4 and CH4 as reactant gases.

[0025] Specifically, during chemical vapor deposition, the CF4:CH4 ratio is set to 3:1, resulting in an F / C ratio of 1.8. This allows CF3 and CH3 radicals to synergistically form a mixed structure of -CF2-CF2- main chain and -CH2- crosslinking points, achieving a balance between fluorine content (F / C = 1.0) and mechanical strength. A temperature of 200-300℃ thermally activates and enhances chemical bonding. CF2 radicals react with Si-O bonds on the SiO2 surface to generate Si-F bonds, while CH3 radical carbon chains crosslink to form a dense network, resulting in uniform film thickness. A pressure of 50-100 Pa and moderate plasma density ensure matching diffusion rates of CF3 and CH3 radicals, forming a continuously growing -CF2-CH2- alternating structure, achieving a balance between dense film coverage and high fluorine content. A power of 300-500 kPa further contributes to this balance. In W, the inductive coupling mode is dominant. The high density of electrons causes CF4 to dissociate into CF2 and F, while CH4 is decomposed into active species such as C2H2, which promotes rapid cross-linking of carbon chains and insertion of fluorine atoms, achieving uniform coverage of the entire surface.

[0026] Furthermore, to put it more precisely, the S400 includes S410. Butyl rubber is coated on the surface of the substrate as an adhesive layer; S420. PE is used as a release material and is applied over the adhesive layer.

[0027] Compared with conventional waterproof and thermal insulation materials, this invention has the following advantages: Fluorocarbon membranes prepared using plasma-enhanced chemical vapor deposition (PECVD) exhibit better uniformity on biomass poly(ethylene furanate) substrates. Precise control of deposition power, temperature, and gas flow rate ratio ensures a more stable growth process, resulting in a more uniform fluorocarbon membrane on the substrate. This translates to smaller thickness variations across different regions and more consistent performance. Enhanced density: Under specific conditions, the energy and reactivity of the plasma are optimized, leading to a denser fluorocarbon membrane structure. This denser membrane layer better blocks the penetration of moisture, oxygen, and other corrosive substances, improving waterproofing and corrosion resistance. Stronger chemical stability: Fluorocarbon membranes deposited under specific conditions possess higher chemical stability, resisting the erosion of a wider range of chemicals. This is because the fluorocarbon bonds in the membrane are more stable and less susceptible to chemical damage. Stronger adhesion: Optimized deposition parameters enhance the adhesion between the fluorocarbon membrane and the substrate. This ensures the membrane is less prone to detachment or peeling during use, improving its durability and reliability.

[0028] Moreover, the waterproof and thermal insulation material involved in this invention possesses excellent environmental sustainability: the fluorocarbon membrane, bio-based polyethylene furanate, butyl rubber, and SiO2 aerogel used are all environmentally friendly materials. Among them, the bio-based polyethylene furanate, after reaching its designed service life, can be more easily recycled or decomposed in the natural environment, thereby reducing the environmental burden and conforming to the development trend of green building. Excellent waterproof performance: The fluorocarbon membrane is a new type of environmentally friendly material with excellent acid and alkali resistance and corrosion resistance, effectively preventing the passage of water vapor and toxic gases, thus achieving a waterproof effect. The fluorocarbon membrane covering the bio-based polyester with added SiO2 aerogel significantly improves the material's waterproof performance. Excellent durability and stability: The main component of SiO2 aerogel is synthetic SiO2, which is environmentally friendly and non-toxic, and can withstand most acid and alkali environments except hydrofluoric acid for a long time without decomposition or deterioration. The fluorocarbon membrane also has good corrosion resistance, bactericidal properties, and UV resistance. These characteristics enable the prepared waterproof and thermal insulation material to have a long service life and stable performance. It also has a wide range of applications: due to its excellent thermal insulation, waterproofing and stability properties, this waterproof and thermal insulation material can be widely used in construction, aerospace, electronics and other fields to meet the thermal insulation and waterproofing needs in different environments.

[0029] Meanwhile, since SiO2 aerogel is a porous structure, its introduction into bio-based polyester alters the surface state of the composite system. This leads to the problem of uneven fluorocarbon film coverage caused by capillary action penetrating into the pores during conventional chemical deposition, resulting in localized stress concentration. However, this technology uses plasma-enhanced chemical vapor deposition to prepare fluorocarbon films, which can enhance the mechanical anchoring effect of the fluorocarbon film and improve the uniformity of the fluorocarbon film deposited on the biomass poly(ethylene furanate) substrate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. Example

[0033] A waterproof and thermal insulation material based on biomass polyester substrate includes a biomass polyester substrate doped with SiO2 aerogel and having a fluorocarbon film deposited on its surface, wherein glass fiber is encapsulated in the biomass polyester substrate and an isolation layer is adhered to the surface of the biomass polyester substrate.

[0034] Furthermore, the biomass polyester substrate is polyethylene furanate, and the isolation layer is PE isolation material.

[0035] Furthermore, regarding the preparation of the aforementioned waterproof and thermal insulation material based on biomass polyester substrate, a method for preparing the aforementioned waterproof and thermal insulation material based on biomass polyester substrate includes: S100. Preparation of glass fiber reinforced bio-based polyester matrix and modified SiO2; S200. The modified SiO2 aerogel is added to the bio-based polyester matrix to form a substrate; S300. A fluorocarbon film is deposited on the surface of the substrate to form a substrate using plasma-enhanced chemical vapor deposition. S400. Adhere a release material to the surface of a substrate.

[0036] In this method, the modified SiO2 aerogel is added to the bio-based polyester matrix, which allows the SiO2 filler to be connected to the polyester matrix through chemical bonds. Moreover, with the addition of glass fibers, the glass fibers can separate some of the entangled chain segments in the bio-based polyester matrix during the SiO2 addition process, thereby allowing SiO2 to be embedded into the chain segments. This further enhances the bonding force between SiO2 and the matrix, effectively avoiding the problem of filler separation and affecting the stability of the material after long-term use.

[0037] Moreover, by adding modified SiO2 and combining it with glass fiber, the mechanical properties of the filler can be effectively avoided due to the decrease in material density caused by the addition of filler.

[0038] Furthermore, by using plasma-enhanced chemical vapor deposition to composite fluorocarbon films with the substrate, a uniform and dense fluorocarbon film can be deposited on the substrate surface.

[0039] Furthermore, S100 includes S110. Mix monomer FDCA with EG, use tetrabutyl titanate as catalyst and triphenyl phosphite as antioxidant to carry out esterification reaction to obtain polyethylene furanate. S120. Activation treatment of glass fiber; S130. The activated glass fiber is blended with molten polyethylene furanate to obtain a glass fiber reinforced bio-based polyester matrix; S140. SiO2 aerogel powder is mixed with KH-550 in an anhydrous ethanol environment and dried to obtain modified SiO2.

[0040] In S140, SiO2 aerogel powder is added to a mixture of silane coupling agent KH-550 and anhydrous ethanol at a volume ratio of 1:85 and left to stand for 6 hours, and then separated and dried to obtain the product.

[0041] Furthermore, S110 includes S111. Using FDCA and EG as monomers, tetrabutyl titanate as catalyst, and triphenyl phosphite as antioxidant, oligomers were synthesized. The mass ratio of FDCA to EG was 1:59 to 1:0.73, which directly affected the chain morphology of the polymer product: excess EG led to short-chain oligomers and low entanglement, while excess FDCA caused rigid segments and excessive crystallization. The mass ratio of butyl titanate catalyst to FDCA was 1:200, and the mass ratio of triphenyl phosphite antioxidant to FDCA was 1:143 to 121.5. Under N2 protection, the mixture was slowly heated from 60°C to 180°C for direct esterification. After the reaction system reached its clearing point, the reaction continued until no more liquid precipitated in the condenser, at which point esterification was terminated, forming oligomers.

[0042] S112. In an environment not exceeding 600 Pa, the prepolymer is stirred at 200~220℃ at a speed of 150~250 r / min to carry out prepolymerization; The pre-condensation reaction lasted for 120 minutes. After the reaction was completed, the environment was evacuated to a vacuum.

[0043] S113. After the pre-polymerization is completed, the polymerization reaction continues under vacuum at a stirring speed of 400~500 r / min until the reaction is completed; The stirring time is 45-60 minutes.

[0044] S114. Using a phenol / tetrachloroethane mixed solution as a solvent, methanol is used to purify the condensation product, polyethylene furanate.

[0045] In this process, a phenol / tetrachloroethane mixed solution with a mass ratio of 1:1 was used as the solvent to completely dissolve the polycondensation product, and then the insoluble matter was filtered off. Methanol was added to the solution to obtain a precipitate. After the precipitate stopped increasing, it was filtered out, dissolved again, and the above steps were repeated three times. The precipitate was then removed, dried, and the purified PEF product was obtained.

[0046] Furthermore, S120 includes S121. Surface activation of glass fibers is performed by acid etching; S122. The glass fiber is soaked in a silane coupling agent, the liquid is wiped dry after soaking, and then cured.

[0047] The process involves cleaning the glass fiber with ethanol to remove surface impurities and oil, then rinsing it with deionized water and drying it for later use.

[0048] The cleaned glass fibers were activated by acid etching, which generated more active sites on the surface of the glass fibers.

[0049] Using ethanol as a solvent, prepare a 0.5%-5% solution of silane coupling agent. Immerse the treated glass fiber in the silane coupling agent solution and impregnate it at 20-80℃ for 0.5-2 hours. Then dry and cure it for later use.

[0050] After the impregnation treatment, the glass fibers are removed and the surface solution is blotted dry with filter paper. Then, they are dried at 80-120℃ for 1-2 hours. The dried glass fibers can then undergo a curing treatment to improve the bonding strength between the silane coupling agent and the glass fiber surface. The curing temperature is generally between 150-200℃, and the time is 2-4 hours.

[0051] Furthermore, in S200, the modified SiO2 aerogel is blended with the bio-based polyester matrix at a temperature of 210~230°C.

[0052] Furthermore, S300 includes S310. The substrate is placed into a vacuum chamber for plasma cleaning; S320. Chemical vapor deposition is performed on the substrate in a vacuum chamber using CF4 and CH4 as reactant gases.

[0053] In S310, the air-dried substrate is placed into the vacuum chamber, the cooling water switch is turned on, the power is turned on, the mechanical pump and solenoid valve are started, the gate valve between the vacuum chamber and the molecular pump is opened, and after evacuation for about 10 minutes, the vacuum gauge power is turned on. After the vacuum degree is less than 50 Pa, the molecular pump is turned on to evacuate the background vacuum, the heating power switch is turned on, and the heating temperature is set to 100-150℃. The process continues until the required vacuum degree (approximately 10⁻³ Pa) is reached. (Pa), turn off the molecular pump, close the gate valve, turn on the RF power supply, preheat the filament, and after the molecular pump stops, turn off the molecular pump power supply, close the solenoid valve between the molecular pump and the mechanical pump, open the solenoid valve between the Roots pump and the mechanical pump, open the Roots pump, open the valve between the Roots pump and the vacuum chamber, and wait for the vacuum chamber pressure to stabilize. After the filament has preheated for 15 minutes, open the argon gas valve and the mixed gas valve to introduce argon gas. After the gas pressure stabilizes, turn on the RF electrode voltage switch and slowly increase the voltage to 500 volts. Adjust the matching capacitor to make the vacuum chamber glow. At this time, there should be an indication of the self-bias voltage. Repeatedly adjust the matching capacitor to make the reflected power close to zero, then increase the voltage to the required power and adjust the matching capacitor to minimize the reflected power and stabilize the glow. In order to further clean the substrate surface and the inner wall of the vacuum chamber, without introducing the reaction gas, let the vacuum chamber glow for about 10 minutes to use argon gas discharge to bombard the vacuum chamber and the substrate, so as to further eliminate the contamination in the vacuum chamber and the impurities on the substrate surface and improve the film quality.

[0054] For the S320, turn on the reaction gas valve and the mass flow controller switch, and control the CF4:CH4 flow ratio to 0.6-0.8. At this time, the power indicator will change. After the flow rate is adjusted and the vacuum is stable, continue to adjust the matching capacitor and the substrate voltage to make the reaction power reach 250-300W and the reflection power reach the minimum. After the ignition is stable, deposition can begin. After deposition, first turn off the plate pressure, turn off the filament and RF switch, then turn off the gas source, valves, and Roots pump. After turning off the Roots pump, stop for about 5 minutes, then turn off the mechanical pump. After dyeing, turn off the flow meter, heating power supply, vacuum gauge power supply and main power supply, and finally turn off the cooling water switch.

[0055] Furthermore, to put it more precisely, the S400 includes S410. Butyl rubber is coated on the surface of the substrate as an adhesive layer; S420. PE is used as a release material and is applied over the adhesive layer.

[0056] In S420, a fluorocarbon film is deposited on a PEF, and butyl rubber is coated on its surface as an adhesive layer with a thickness of 0.5-0.6 mm. A PE release layer coated with silicone oil is then attached to the adhesive layer to obtain the finished waterproof membrane. Example

[0057] In this embodiment, the difference from Example 1 is that after the deposition of the fluorocarbon film is completed, the material on which the fluorocarbon film has been deposited is annealed by heating to 220~230℃, holding for 30 minutes, and then naturally cooling to room temperature to eliminate stress during the deposition process of the fluorocarbon film and improve the thermal stability of the film. The thickness of the film after treatment is about 500 nm.

[0058] The product in Example 1 was tested according to the methods disclosed in GB 23260-2009 "Waterproof membranes with self-adhesive layers" and GB / T18173.1-2012 "Polymer waterproof materials - Part 1: Sheets". The physical performance indicators were compared with FS2, and the results are as follows:

[0059]

[0060]

[0061] Thermal conductivity testing

[0062] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing a waterproof and thermally insulating material based on a biomass polyester substrate, characterized in that, include: S100. Preparation of glass fiber reinforced bio-based polyester matrix and modified SiO2 aerogel; S200. Modified SiO2 aerogel is added to the bio-based polyester matrix to form a substrate; S300. A fluorocarbon film is deposited on the surface of the substrate using plasma-enhanced chemical vapor deposition to form a substrate; S400. Adhere a release material to the surface of a substrate; The bio-based polyester matrix is ​​polyethylene furanate; The glass fiber is inserted into the entanglement position of the polymer chain segments of polyethylene furanate, and part of the SiO2 aerogel is embedded in the chain segments.

2. The method for preparing a waterproof and thermally insulating material based on a biomass polyester substrate according to claim 1, characterized in that, The insulating material is PE insulating material.

3. The method for preparing a waterproof and thermally insulating material based on a biomass polyester substrate according to claim 1, characterized in that, The S100 includes S110. Mix monomer FDCA with EG, use tetrabutyl titanate as catalyst and triphenyl phosphite as antioxidant to carry out esterification reaction to obtain polyethylene furanate. S120. Activation treatment of glass fiber; S130. The activated glass fiber is blended with molten polyethylene furanate to obtain a glass fiber reinforced bio-based polyester matrix; S140. SiO2 aerogel powder is mixed with KH-550 in an anhydrous ethanol environment and dried to obtain modified SiO2 aerogel.

4. The method for preparing a waterproof and thermally insulating material based on a biomass polyester substrate according to claim 3, characterized in that, S110 includes S111. Using FDCA and EG as monomers, tetrabutyl titanate as catalyst, and triphenyl phosphite as antioxidant, oligomers were synthesized. S112. In a vacuum environment, the prepolymer is stirred at 200~220℃ at a speed of 150~250r / min to carry out prepolymerization; S113. After the pre-polymerization is completed, continue the polymerization reaction at a stirring speed of 400~500r / min until the reaction is completed; S114. Using a phenol / tetrachloroethane mixed solution as a solvent, methanol is used to purify the condensation product, polyethylene furanate.

5. The method for preparing a waterproof and thermally insulating material based on a biomass polyester substrate according to claim 3, characterized in that, The S120 includes S121. Surface activation of glass fibers is performed by acid etching; S122. The glass fiber is soaked in a silane coupling agent, the liquid is wiped dry after soaking, and then cured.

6. A method for preparing a waterproof and thermally insulating material based on a biomass polyester substrate according to claim 1, characterized in that, In S200, the modified SiO2 aerogel is blended with the bio-based polyester matrix at a temperature of 210~230℃.

7. The method for preparing a waterproof and thermally insulating material based on a biomass polyester substrate according to claim 1, characterized in that, The S300 includes S310. The substrate is placed into a vacuum chamber for plasma cleaning; S320. Chemical vapor deposition is performed on the substrate in a vacuum chamber using CF4 and CH4 as reactant gases.

8. A method for preparing a waterproof and thermally insulating material based on a biomass polyester substrate according to claim 7, characterized in that, The flow rate ratio of CF4 to CH4 is 0.6~0.8, and the reaction power is 250~300W.

9. The method for preparing a waterproof and thermally insulating material based on a biomass polyester substrate according to claim 1, characterized in that, The S400 includes S410. Butyl rubber is coated on the surface of the substrate as an adhesive layer; S420. PE is used as a release material and is applied over the adhesive layer.

10. A waterproof and thermally insulating material based on biomass polyester substrate, characterized in that, The waterproof and thermal insulation material based on biomass polyester substrate is prepared using any one of the methods described in claims 1 to 9.

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