Preparation method of degradable elastic material and application of degradable elastic material in electric kettle

Abstract

The invention relates to the technical field of elastic materials. The degradable elastic material is prepared from the following raw materials in parts by weight: 40 to 50 parts of bio-based polyether polyol, 20 to 30 parts of polylactic acid, 6 to 10 parts of bio-based polybutylene terephthalate, 6 to 10 parts of bio-based polycaprolactone triol, 4 to 6 parts of filler, 2 to 4 parts of citric acid, 2 to 4 parts of itaconic anhydride, 0.6 to 1 part of zinc stearate, 0.4 to 0.6 part of stannous octoate and 1 to 6 parts of 1, 3-pentanediol monoisobutyrate. And 2 parts of erucyl amide. According to the invention, bacteria can metabolize, breed and secrete hydrolase, the hydrolase is fixed in the filler in the subsequent freeze-drying treatment, and when the final material is in an environment rich in microorganisms, the preloaded hydrolase can be activated and slowly released to start a hydrolysis reaction in the material, so that the breakage of a polymer chain is greatly accelerated; the degradation efficiency of the kettle material made of the degradable elastic material is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of elastic materials technology, specifically to a method for preparing a biodegradable elastic material and its application in an electric kettle. Background Technology

[0002] Elastic materials are materials that deform under external force and return to their original shape after the external force is removed. Their elasticity comes from the reversible interaction between molecules or atoms and they are widely used in packaging materials, seals, medical devices and other fields.

[0003] In existing technologies, electric kettle materials made of elastic materials exhibit good strength during use, but poor degradation performance, resulting in significant environmental pollution after disposal and hindering widespread adoption. Therefore, this invention provides a method for preparing a biodegradable elastic material and its application in electric kettles. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing a biodegradable elastic material and its application in electric kettles. The electric kettle material prepared by this invention not only has good degradation performance but also excellent strength performance, effectively improving the performance of the electric kettle material.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A biodegradable elastic material comprises the following raw materials in parts by weight: 40-50 parts bio-based polyether polyol, 20-30 parts polylactic acid, 6-10 parts bio-based polybutylene terephthalate, 6-10 parts bio-based polycaprolactone triol, 4-6 parts filler, 2-4 parts citric acid, 2-4 parts itaconic anhydride, 0.6-1 part zinc stearate, 0.4-0.6 parts stannous octoate, and 1-2 parts erucamide;

[0007] The filler is prepared by the following method:

[0008] S1: Preparation of additives. The raw materials for additives include polyethylene glycol, dichloromethane, dimethyl sulfoxide, and a mixed solution. The raw materials for the mixed solution include luteolin, chitosan, polyglutamic acid, deionized water, and Bacillus licheniformis.

[0009] S2: Preparation of excipients, the raw materials of which include KH560, diethylene glycol, carbon black, and dimethyl 2,5-furandicarboxylate;

[0010] S3: Mixing treatment, the additives and auxiliary materials are stirred at 300-400 rpm for 20-30 minutes to obtain the filler.

[0011] Further, the method for preparing the additive is as follows: Polyethylene lactide, dichloromethane, and dimethyl sulfoxide are added to a mixer, the mixer is set to a speed of 800-1000 rpm for 20-30 minutes, the product obtained by stirring is homogenized and emulsified, the product is centrifuged to obtain solids, the solids are washed with deionized water, the product is freeze-dried to obtain coarse material, the coarse material and the mixture are added to a mixer, the mixer is set to a speed of 400-600 rpm for 20-40 minutes, the product is centrifuged to obtain solids, the solids are washed with deionized water, the product is freeze-dried to obtain the additive.

[0012] Furthermore, the mass ratio of polyethylene glycol, dichloromethane, and dimethyl sulfoxide is 1:(0.1-0.2):(0.06-0.08), and the mass ratio of coarse material to mixed liquid is 1:(2-4).

[0013] Further, the mixture is prepared by the following method: luteolin, chitosan, polyglutamic acid, and deionized water are added to the mixture, the mixer is set to 60-100 rpm and stirred for 10-20 min, Bacillus licheniformis is added to the product, and the mixture is cultured at 36-38℃ for 10-20 h, and the product is mixed with 2-3 times the mass of methanol to obtain the mixture.

[0014] Furthermore, the mass ratio of luteolin, chitosan, polyglutamic acid, and deionized water is 1:(0.3-0.5):(0.1-0.2):(2-3), and the mass of Bacillus licheniformis is 0.2-0.4% of the mass of luteolin.

[0015] Further, the method for preparing the excipient is as follows: KH560, diethylene glycol, and carbon black are added to a reaction vessel, the reaction vessel is set to a speed of 60-100 rpm, and the mixture is stirred at 100℃, 120℃, and 140℃ for 40 min respectively. The resulting product is added to a mixer, and 2,5-dimethyl furanate is added to the mixer. The mixer is set to 200-300 rpm and stirred for 10-20 min to obtain the excipient.

[0016] Furthermore, the mass ratio of KH560, diethylene glycol, and carbon black is 1:(0.4-0.6):(6-8), and the mass of dimethyl 2,5-furandicarboxylate is 70-90% of the mass of carbon black.

[0017] Furthermore, the mass of the excipients is 10-20% of the mass of the additives.

[0018] Furthermore, a method for preparing a biodegradable elastic material includes the following steps: polylactic acid and bio-based polybutylene terephthalate are placed in a vacuum drying oven, with the temperature set at 60–80°C, the vacuum degree at -0.08 MPa, and the treatment time at 4–6 h; bio-based polyether polyol is placed in an oven, with the oven set at 40–60°C for drying at 40–60 min; the treated bio-based polyether polyol, polylactic acid, and bio-based polybutylene terephthalate are weighed as needed and added to a reaction vessel, with the rotation speed set at 200–300 rpm and the temperature at 100–140°C; and the treatment is then carried out. After 4–6 minutes, itaconic anhydride and bio-based polycaprolactone triol are added. The temperature is set at 150–170°C, and the treatment lasts for 2–3 minutes. Then, citric acid and stannous octoate are added. The temperature is set at 160–180°C, and the treatment lasts for 1–2 minutes. The resulting product is then fed into a twin-screw extruder. Fillers, zinc stearate, and erucamide are weighed and added to the twin-screw extruder as needed. The twin-screw extruder is set at a speed of 200–300 rpm, a temperature of 230–250°C, and a residence time of 3–5 minutes. The extruded product is then pelletized to obtain a biodegradable elastic material.

[0019] Furthermore, the application of a biodegradable elastic material prepared by a method for preparing a biodegradable elastic material includes the following steps: the biodegradable elastic material is added to an injection molding machine for melting treatment, then the molten material is injected into a mold, and after cooling and solidification, the mold is opened, the molded part is taken out and trimmed to obtain the base and outer shell material of an electric kettle.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, during the preparation of biodegradable elastic materials, luteolin, as a fiber component, plays a reinforcing and supporting role in the elastic material system. At the same time, it can also provide a carbon source during the degradation process, promoting the colonization of microorganisms on the material surface. Through the treatment of the material by Bacillus licheniformis, the bacteria will metabolize and multiply, secreting hydrolytic enzymes. In the subsequent freeze-drying process, the hydrolytic enzymes are fixed in the filler. When the final material is in an environment rich in microorganisms, these pre-loaded hydrolytic enzymes will be activated and slowly released, initiating a hydrolysis reaction inside the material, greatly accelerating the breakage of polymer chains, and effectively improving the degradation efficiency of the water bottle material made of biodegradable elastic material.

[0022] 2. In this invention, the addition of carbon black to the excipients allows carbon black to play a reinforcing role and hinder the slippage of polymer chains in the material system. KH560 enables stress to be effectively transferred between the filler and the matrix, giving full play to the reinforcing effect of carbon black in the filler. At the same time, the binding properties of luteolin and chitosan are utilized to ensure that the material maintains its strength during use and improves its durability. Attached Figure Description

[0023] Figure 1 This invention provides a method for preparing a biodegradable elastic material and a formula diagram for its application in an electric kettle. Detailed Implementation

[0024] 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.

[0025] It should be noted that the raw materials used in the following embodiments are all commercially available.

[0026] Example 1:

[0027] Raw material preparation:

[0028] 40 parts bio-based polyether polyol, 20 parts polylactic acid, 6 parts bio-based polybutylene terephthalate, 6 parts bio-based polycaprolactone triol, 4 parts filler, 2 parts citric acid, 2 parts itaconic anhydride, 0.6 parts zinc stearate, 0.4 parts stannous octoate, 1 part erucamide;

[0029] Packing material preparation:

[0030] S1: Preparation of additive. The method for preparing the additive is as follows: Poly(ethylene lactide), dichloromethane, and dimethyl sulfoxide are added to a mixer. The mixer is set to a speed of 800 rpm and processed for 20 minutes. The product obtained by stirring is homogenized and emulsified. The product is then centrifuged to obtain solids. The solids are washed with deionized water. The product is then freeze-dried to obtain coarse material. The coarse material and the mixture are added to a mixer. The mixer is set to a speed of 400 rpm and stirred for 20 minutes. The product is then centrifuged to obtain solids. The solids are washed with deionized water. The product is then freeze-dried to obtain the additive. The mass ratio of poly(ethylene lactide), dichloromethane, and dimethyl sulfoxide is 1:0.1:0.06, and the mass ratio of coarse material to mixture is 1:2.

[0031] The mixture was prepared by the following method: luteolin, chitosan, polyglutamic acid, and deionized water were added to a mixing plant, and the mixture was stirred at 60 rpm for 10 min. Bacillus licheniformis was added to the resulting product, and the mixture was incubated at 36℃ for 10 h. The resulting product was then mixed with twice its mass of methanol to obtain the final mixture. The mass ratio of luteolin, chitosan, polyglutamic acid, and deionized water was 1:0.3:0.1:2, and the mass of Bacillus licheniformis was 0.2% of the luteolin mass.

[0032] S2: Preparation of excipients. The method for preparing excipients is as follows: KH560, diethylene glycol, and carbon black are added to a reaction vessel. The reaction vessel is set to a rotation speed of 60 rpm and stirred at 100℃, 120℃, and 140℃ for 40 min respectively. The resulting product is added to a mixer, and dimethyl 2,5-furandicarboxylate is added to the mixer. The mixer is set to 200 rpm and stirred for 10 min to obtain the excipients. The mass ratio of KH560, diethylene glycol, and carbon black is 1:0.4:6, the mass of dimethyl 2,5-furandicarboxylate is 70% of the mass of carbon black, and the mass of the excipients is 10% of the mass of the additives.

[0033] S3: Mixing treatment, the additives and auxiliary materials are stirred at 300 rpm for 20 min to obtain the filler;

[0034] Preparation of biodegradable elastic materials:

[0035] Polylactic acid (PLA) and bio-based polybutylene terephthalate (PBTB) were placed in a vacuum drying oven at 60°C and a vacuum of -0.08 MPa for 4 hours. Bio-based polyether polyol was placed in an oven at 40°C for 40 minutes. The treated bio-based polyether polyol, PLA, and PBTB were then weighed and added to a reaction vessel. The reaction vessel was set to 200 rpm and 100°C for 4 minutes. Afterward, italcon was added. Acid anhydride and bio-based polycaprolactone triol were added, and the temperature was set at 150℃ for 2 minutes. Then, citric acid and stannous octoate were added, and the temperature was set at 160℃ for 1 minute. The resulting product was added to a twin-screw extruder. Filler, zinc stearate, and erucamide were weighed and added to the twin-screw extruder as needed. The twin-screw extruder was set at a speed of 200 rpm, a temperature of 230℃, and a residence time of 3 minutes. The extruded product was pelletized to obtain a biodegradable elastic material.

[0036] Finished product preparation:

[0037] Biodegradable elastic material is added to an injection molding machine for melting treatment. The molten material is then injected into a mold. After cooling and solidification, the mold is opened, the molded part is removed, and the edges are trimmed to obtain the base and outer shell material of the electric kettle.

[0038] Example 2:

[0039] Raw material preparation:

[0040] 45 parts bio-based polyether polyol, 25 parts polylactic acid, 8 parts bio-based polybutylene terephthalate, 8 parts bio-based polycaprolactone triol, 5 parts filler, 3 parts citric acid, 3 parts itaconic anhydride, 0.8 parts zinc stearate, 0.5 parts stannous octoate, 1.5 parts erucamide;

[0041] Packing material preparation:

[0042] S1: Preparation of additive. The method for preparing the additive is as follows: Poly(ethylene lactide), dichloromethane, and dimethyl sulfoxide are added to a mixer. The mixer is set to a speed of 900 rpm and processed for 25 minutes. The product obtained by stirring is homogenized and emulsified. The product is then centrifuged to obtain solids. The solids are washed with deionized water. The product is then freeze-dried to obtain coarse material. The coarse material and the mixture are added to a mixer. The mixer is set to a speed of 500 rpm and stirred for 30 minutes. The product is then centrifuged to obtain solids. The solids are washed with deionized water. The product is then freeze-dried to obtain the additive. The mass ratio of poly(ethylene lactide), dichloromethane, and dimethyl sulfoxide is 1:0.15:0.07, and the mass ratio of coarse material to mixture is 1:3.

[0043] The mixture was prepared by the following method: luteolin, chitosan, polyglutamic acid, and deionized water were added to a mixing plant, and the mixture was stirred at 80 rpm for 15 min. Bacillus licheniformis was added to the resulting product, and the mixture was incubated at 37°C for 15 h. The resulting product was then mixed with 2.5 times its mass of methanol to obtain the mixture. The mass ratio of luteolin, chitosan, polyglutamic acid, and deionized water was 1:0.4:0.15:2.5, and the mass of Bacillus licheniformis was 0.3% of the luteolin mass.

[0044] S2: Preparation of excipients. The method for preparing excipients is as follows: KH560, diethylene glycol, and carbon black are added to a reaction vessel. The reaction vessel is set to a rotation speed of 80 rpm and stirred at 100℃, 120℃, and 140℃ for 40 min respectively. The resulting product is added to a mixer, and dimethyl 2,5-furandicarboxylate is added to the mixer. The mixer is set to 250 rpm and stirred for 15 min to obtain the excipients. The mass ratio of KH560, diethylene glycol, and carbon black is 1:0.5:7, the mass of dimethyl 2,5-furandicarboxylate is 80% of the mass of carbon black, and the mass of the excipients is 15% of the mass of the additives.

[0045] S3: Mixing treatment, the additives and auxiliary materials are stirred at 350 rpm for 25 min to obtain the filler;

[0046] Preparation of biodegradable elastic materials:

[0047] Polylactic acid (PLA) and bio-based polybutylene terephthalate (PBTB) were placed in a vacuum drying oven at 70°C and a vacuum of -0.08 MPa for 5 hours. Bio-based polyether polyol was placed in an oven at 50°C for 50 minutes. The treated bio-based polyether polyol, PLA, and PBTB were then weighed and added to a reaction vessel. The reaction vessel was set at 250 rpm and 120°C for 5 minutes. Itaconic anhydride was then added. Bio-based polycaprolactone triol was added, and the temperature was set at 160℃ for 2.5 min. Then, citric acid and stannous octoate were added, and the temperature was set at 170℃ for 1.5 min. The resulting product was added to a twin-screw extruder. Filler, zinc stearate, and erucamide were weighed and added to the twin-screw extruder as needed. The twin-screw extruder was set at a speed of 250 rpm, a temperature of 240℃, and a residence time of 4 min. The extruded product was pelletized to obtain a biodegradable elastic material.

[0048] Finished product preparation:

[0049] Biodegradable elastic material is added to an injection molding machine for melting treatment. The molten material is then injected into a mold. After cooling and solidification, the mold is opened, the molded part is removed, and the edges are trimmed to obtain the base and outer shell material of the electric kettle.

[0050] Example 3:

[0051] Raw material preparation:

[0052] 50 parts bio-based polyether polyol, 30 parts polylactic acid, 10 parts bio-based polybutylene terephthalate, 10 parts bio-based polycaprolactone triol, 6 parts filler, 4 parts citric acid, 4 parts itaconic anhydride, 1 part zinc stearate, 0.6 parts stannous octoate, 2 parts erucamide;

[0053] Packing material preparation:

[0054] S1: Preparation of additive. The method for preparing the additive is as follows: Poly(ethylene lactide), dichloromethane, and dimethyl sulfoxide are added to a mixer. The mixer is set to a speed of 1000 rpm and processed for 30 minutes. The product obtained by stirring is homogenized and emulsified. The product is then centrifuged to obtain solids. The solids are washed with deionized water. The product is then freeze-dried to obtain coarse material. The coarse material and the mixture are added to a mixer. The mixer is set to a speed of 600 rpm and stirred for 40 minutes. The product is then centrifuged to obtain solids. The solids are washed with deionized water. The product is then freeze-dried to obtain the additive. The mass ratio of poly(ethylene lactide), dichloromethane, and dimethyl sulfoxide is 1:0.2:0.08, and the mass ratio of coarse material to mixture is 1:4.

[0055] The mixture was prepared by the following method: luteolin, chitosan, polyglutamic acid, and deionized water were added to a mixing plant, and the mixture was stirred at 100 rpm for 20 min. Bacillus licheniformis was added to the resulting product, and the mixture was incubated at 38℃ for 20 h. The resulting product was then mixed with three times its mass of methanol to obtain the mixture. The mass ratio of luteolin, chitosan, polyglutamic acid, and deionized water was 1:0.5:0.2:3, and the mass of Bacillus licheniformis was 0.4% of the mass of luteolin.

[0056] S2: Preparation of excipients. The method for preparing excipients is as follows: KH560, diethylene glycol, and carbon black are added to a reaction vessel. The reaction vessel is set to a rotation speed of 100 rpm and stirred at 100℃, 120℃, and 140℃ for 40 min respectively. The resulting product is added to a mixer, and dimethyl 2,5-furandicarboxylate is added to the mixer. The mixer is set to 300 rpm and stirred for 20 min to obtain the excipients. The mass ratio of KH560, diethylene glycol, and carbon black is 1:0.6:8, the mass of dimethyl 2,5-furandicarboxylate is 90% of the mass of carbon black, and the mass of the excipients is 20% of the mass of the additives.

[0057] S3: Mixing treatment, the additives and auxiliary materials are stirred at 400 rpm for 30 min to obtain the filler;

[0058] Preparation of biodegradable elastic materials:

[0059] Polylactic acid (PLA) and bio-based polybutylene terephthalate (PBTB) were placed in a vacuum drying oven at 80°C and a vacuum of -0.08 MPa for 6 hours. Bio-based polyether polyol was placed in an oven at 60°C for 60 minutes. The treated bio-based polyether polyol, PLA, and PBTB were then weighed and added to a reaction vessel. The reaction vessel was set at 300 rpm and 140°C for 6 minutes. Afterward, italcon was added. Acid anhydride and bio-based polycaprolactone triol were added, and the temperature was set at 170℃ for 3 minutes. Then, citric acid and stannous octoate were added, and the temperature was set at 180℃ for 2 minutes. The resulting product was added to a twin-screw extruder. Filler, zinc stearate, and erucamide were weighed and added to the twin-screw extruder as needed. The twin-screw extruder was set at a speed of 300 rpm, a temperature of 250℃, and a residence time of 5 minutes. The extruded product was pelletized to obtain a biodegradable elastic material.

[0060] Finished product preparation:

[0061] Biodegradable elastic material is added to an injection molding machine for melting treatment. The molten material is then injected into a mold. After cooling and solidification, the mold is opened, the molded part is removed, and the edges are trimmed to obtain the base and outer shell material of the electric kettle.

[0062] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain carbon black.

[0063] Comparative Example 2: The difference between this comparative example and Example 1 is that this comparative example does not contain Bacillus licheniformis.

[0064] Comparative Example 3 differs from Example 1 in that it does not contain filler.

[0065] Performance testing: Performance tests were conducted on the electric kettle materials prepared in Examples 1, 2, 3, 1, 2, 3, and 4 (Comparative Examples). The test data are recorded in the table below:

[0066] Testing items Degradation rate (%) Impact resistance (m) Example 1 73.8 4.7 Example 2 72.2 4.5 Example 3 72.6 4.4 Comparative Example 1 71.4 2.2 Comparative Example 2 49.7 4.3 Comparative Example 3 45.9 2.1

[0067] In the performance test, the degradation rate was tested as follows: the electric kettle materials prepared in Examples 1, 2, 3, 1, 2, 3 and 4 were selected and buried in 2000g of soil with a pH of 7.0, a water content of 25%, and a temperature of 30℃ for 1 year. During the burial process, 30mL of 1% glucose solution was added to the soil every 15 days. After the time was over, the mass loss rate of the electric kettle materials was calculated to obtain the degradation rate data.

[0068] The impact resistance test method is as follows: The electric kettle materials prepared in Examples 1, 2, 3, Comparative Examples 1, 2, 3 and 4 are respectively laid horizontally and fixed. A steel ball is dropped from above the rim of the kettle for impact testing. The steel ball weighs 500g and the initial height is 1m. After each test, the height of the steel ball is increased by 0.1m and the test is continued until obvious cracks appear on the surface of the electric kettle material.

[0069] It is evident that the degradation performance and strength performance of the electric kettle materials prepared in Comparative Examples 1, 2, 3, and 4 are all lower than those in Examples 1, 2, and 3. This indicates that in the preparation of biodegradable elastic materials, luteolin, as a fiber component, plays a reinforcing supporting role in the elastic material system, while also providing a carbon source during degradation and promoting the colonization of microorganisms on the material surface. Through the treatment of the material by Bacillus licheniformis, the bacteria will metabolize and multiply, secreting hydrolytic enzymes. In the subsequent freeze-drying process, the hydrolytic enzymes are fixed in the filler. When the final material is in an environment rich in microorganisms, these pre-loaded hydrolytic enzymes will be activated and slowly released, initiating a hydrolysis reaction inside the material, significantly accelerating the breakage of polymer chains, and effectively improving the degradation efficiency of the kettle material made of biodegradable elastic material.

[0070] The addition of carbon black to the excipients allows carbon black to play a reinforcing role, hindering the slippage of polymer chains in the material system. KH560 enables stress to be effectively transferred between the filler and the matrix, fully leveraging the reinforcing effect of carbon black in the filler. At the same time, the binding properties of luteolin and chitosan ensure that the material maintains its strength during use and improves its durability.

[0071] By comparing and analyzing the relevant data in the table, it can be seen that the electric kettle material prepared by this invention not only has good degradation performance but also excellent strength properties. This indicates that the biodegradable elastic material provided by this invention has a broader market prospect and is more suitable for widespread application.

[0072] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A biodegradable elastic material, characterized in that: The raw materials include the following parts by weight: 40-50 parts bio-based polyether polyol, 20-30 parts polylactic acid, 6-10 parts bio-based polybutylene terephthalate, 6-10 parts bio-based polycaprolactone triol, 4-6 parts filler, 2-4 parts citric acid, 2-4 parts itaconic anhydride, 0.6-1 part zinc stearate, 0.4-0.6 parts stannous octoate, and 1-2 parts erucamide; The filler is prepared by the following method: S1: Preparation of additives. The raw materials for additives include polyethylene glycol, dichloromethane, dimethyl sulfoxide, and a mixed solution. The raw materials for the mixed solution include luteolin, chitosan, polyglutamic acid, deionized water, and Bacillus licheniformis. S2: Preparation of excipients, the raw materials of which include KH560, diethylene glycol, carbon black, and dimethyl 2,5-furandicarboxylate; S3: Mixing treatment, the additives and auxiliary materials are stirred at 300-400 rpm for 20-30 minutes to obtain the filler.

2. The biodegradable elastic material according to claim 1, characterized in that, The method for preparing the additive is as follows: Polyethylene lactide, dichloromethane, and dimethyl sulfoxide are added to a mixer, which is set to a speed of 800-1000 rpm for 20-30 minutes. The product obtained by stirring is then homogenized and emulsified. The product is then centrifuged to obtain a solid. The solid is washed with deionized water, and the product is then freeze-dried to obtain a coarse material. The coarse material and the mixture are added to a mixer, which is set to a speed of 400-600 rpm for 20-40 minutes. The product is then centrifuged to obtain a solid. The solid is washed with deionized water, and the product is then freeze-dried to obtain the additive.

3. The biodegradable elastic material according to claim 2, characterized in that, The mass ratio of polyethylene glycol, dichloromethane, and dimethyl sulfoxide is 1:(0.1-0.2):(0.06-0.08), and the mass ratio of coarse material to mixed liquid is 1:(2-4).

4. The biodegradable elastic material according to claim 2, characterized in that, The mixture is prepared by the following method: luteolin, chitosan, polyglutamic acid, and deionized water are added to the mixture, and the mixer is set to 60-100 rpm for 10-20 min. Bacillus licheniformis is added to the product and cultured at 36-38℃ for 10-20 h. The product is then mixed with 2-3 times its mass of methanol to obtain the mixture.

5. The biodegradable elastic material according to claim 4, characterized in that, The mass ratio of luteolin, chitosan, polyglutamic acid, and deionized water is 1:(0.3-0.5):(0.1-0.2):(2-3), and the mass of Bacillus licheniformis is 0.2-0.4% of the mass of luteolin.

6. The biodegradable elastic material according to claim 1, characterized in that, The method for preparing the excipient is as follows: KH560, diethylene glycol, and carbon black are added to a reaction vessel, the reaction vessel is set to a speed of 60-100 rpm, and the mixture is stirred at 100℃, 120℃, and 140℃ for 40 min respectively. The resulting product is added to a mixer, and 2,5-dimethyl furanate is added to the mixer. The mixer is set to 200-300 rpm and stirred for 10-20 min to obtain the excipient.

7. The biodegradable elastic material according to claim 6, characterized in that, The mass ratio of KH560, diethylene glycol, and carbon black is 1:(0.4-0.6):(6-8), and the mass of dimethyl 2,5-furandicarboxylate is 70-90% of the mass of carbon black.

8. The biodegradable elastic material according to claim 1, characterized in that, The mass of the auxiliary materials is 10-20% of the mass of the additives.

9. A method for preparing a biodegradable elastic material according to any one of claims 1 to 8, characterized in that, Includes the following steps: Polylactic acid (PLA) and bio-based polybutylene terephthalate (PBTB) were placed in a vacuum drying oven at a temperature of 60–80°C and a vacuum of -0.08 MPa for 4–6 hours. Bio-based polyether polyol was placed in an oven at 40–60°C for 40–60 minutes. The treated bio-based polyether polyol, PLA, and PBTB were weighed and added to a reaction vessel. The reaction speed was set to 200–300 rpm and the temperature to 100–140°C for 4–6 minutes. Afterward, italcon was added. Acid anhydride and bio-based polycaprolactone triol were added, and the temperature was set at 150–170°C for 2–3 minutes. Then, citric acid and stannous octoate were added, and the temperature was set at 160–180°C for 1–2 minutes. The resulting product was added to a twin-screw extruder. Filler, zinc stearate, and erucamide were weighed and added to the twin-screw extruder as needed. The speed of the twin-screw extruder was set at 200–300 rpm, the temperature at 230–250°C, and the residence time at 3–5 minutes. The extruded product was pelletized to obtain a biodegradable elastic material.

10. The application of a biodegradable elastic material prepared by the method for preparing a biodegradable elastic material according to claim 9, characterized in that, Includes the following steps: Biodegradable elastic material is added to an injection molding machine for melting treatment. The molten material is then injected into a mold. After cooling and solidification, the mold is opened, the molded part is removed, and the edges are trimmed to obtain the base and outer shell material of the electric kettle.

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