High-temperature-resistant environment-friendly material for water cup

Abstract

The invention discloses a high-temperature-resistant environment-friendly material for a water cup, and belongs to the technical field of environment-friendly materials, the high-temperature-resistant environment-friendly material for the water cup comprises a modified PP material, and the modified PP material is prepared from the following raw materials in parts by weight: 220-350 parts of PP master batch, 40.8-56.7 parts of ultrahigh-pressure modified combined fish scale gelatin-chitosan assembled hydroxyapatite microspheres, and 9.6-15.5 parts of Mxene / carbon dot doped additive; wherein the ultrahigh-pressure modified and fish scale gelatin-chitosan assembled hydroxyapatite microspheres are obtained by firstly performing high-pressure modification treatment on pre-balled fish scale gelatin-chitosan assembled hydroxyapatite microspheres, then performing slit ultrasonic modification treatment and finally performing freezing treatment. The prepared high-temperature-resistant environment-friendly material can meet the high-temperature requirement and has the advantages of being high in mechanical strength, safe, environmentally friendly and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of environmentally friendly materials, and in particular to a high-temperature resistant environmentally friendly material for a water cup. Background Art

[0002] Currently, water cups are available in a wide variety of materials on the market. To meet the diverse needs of consumers, a wide variety of materials are emerging. Examples include lightweight and easy-to-carry plastic cups (such as PP (polypropylene)), safe and durable glass cups, high-quality ceramic cups, and healthy and environmentally friendly biodegradable cups.

[0003] However, the above-mentioned single-material water cups all have some defects to a greater or lesser extent. For example, PP material has poor high-temperature resistance, is easy to deform and age, and may precipitate chemical components after repeated exposure to high temperatures; the most obvious defects of glass and ceramic water cups are that they are not resistant to falling, are heavy and not easy to carry; biodegradable water cups have a short lifespan, and will deform, soften, and even produce odor when filled with hot water.

[0004] Therefore, the market is in urgent need of a composite material that combines the advantages of high temperature resistance, high mechanical strength, safety and environmental protection. Based on this, the present invention designs a high temperature resistant and environmentally friendly material for water cups to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a high-temperature resistant and environmentally friendly material for a water cup.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A high-temperature resistant and environmentally friendly material for a water cup comprises a modified PP material and is prepared from the following raw materials in parts by weight: 220-350 parts of a PP masterbatch, 40.8-56.7 parts of hydroxyapatite microspheres assembled by ultrahigh pressure modification combined with fish scale gelatin-chitosan, and 9.6-15.5 parts of an MXene / carbon doping additive. The ultrahigh pressure modified hydroxyapatite microspheres assembled by ultrahigh pressure modification combined with fish scale gelatin-chitosan are obtained by first subjecting pre-sphericalized hydroxyapatite microspheres assembled by fish scale gelatin-chitosan to a high-pressure modification treatment, then to a slit ultrasonic modification treatment, and finally to a freezing treatment.

[0008] Furthermore, the preparation method of fish scale gelatin-chitosan assembled hydroxyapatite microspheres is as follows:

[0009] A. Dissolve fish scale gelatin powder in deionized water at 45-55°C to prepare 8.5-12%wt fish scale gelatin solution; add 0.5-2%wt citric acid solution to the fish scale gelatin solution until the pH value reaches 4.0-5.0, and then continue stirring at 50-55°C for 1-1.5 hours to obtain a modified fish scale gelatin solution;

[0010] B. Dissolve chitosan in 1% acetic acid solution to prepare a 2.2-3% wt chitosan solution; mix the modified fish scale gelatin solution and the chitosan solution in a volume ratio of 2-3:1, stir at 45-55°C for 1.2-2.4 hours, and then adjust the pH to 6.2-6.6 to obtain a modified fish scale gelatin-chitosan solution;

[0011] C. Mix hydroxyapatite with modified fish scale gelatin-chitosan solution in a mass ratio of 1:5-7, and self-assemble to form fish scale gelatin-chitosan assembled hydroxyapatite microspheres.

[0012] Furthermore, in step C, the particle size of hydroxyapatite is 200-300 mesh.

[0013] Furthermore, in step C, fish scale gelatin-chitosan assembled hydroxyapatite microspheres are self-assembled by spray drying; spray drying parameters are: atomization pressure 0.18~0.22MPa, feed rate 20~30mL / min, inlet air temperature 145~155℃, outlet air temperature 80~90℃, and 30~40μm fish scale gelatin-chitosan assembled hydroxyapatite microspheres are obtained by screening.

[0014] Furthermore, the high-pressure modification treatment step is: performing ultra-high pressure modification treatment on the fish scale gelatin-chitosan assembled hydroxyapatite microspheres at 165~230MPa.

[0015] Furthermore, the parameters of the slit ultrasonic modification treatment are controlled at: ultrasonic power density of 180~200w / L; ultrasonic frequency of 25~30kHz; ultrasonic treatment time of 6~10min; and room temperature.

[0016] Furthermore, the freezing treatment parameters are: temperature -5~0℃, 15~20min.

[0017] Furthermore, the fish scale gelatin is tilapia fish scale gelatin.

[0018] Furthermore, the preparation method of the MXene / carbon dot doping additive is as follows:

[0019] 1) First, 9.62-14.42 parts of ethylenediamine were dissolved in deionized water to prepare a 9-13% wt ethylenediamine solution, followed by the addition of 3.24-6.49 parts of cellulose nanocrystals. The solution was then hydrothermally reacted at 200-220°C for 4-8 hours and centrifuged to obtain a filtrate. The filtrate was then dialyzed and the product was freeze-dried to obtain carbon dots.

[0020] 2) MXene was added to deionized water to prepare a 0.1-0.3% wt MXene dispersion. The carbon dots were slowly added to the MXene dispersion at a MXene to carbon dot mass ratio of 0.1-0.3:1. The mixture was magnetically stirred for 1.5-2.2 hours and dried to form a MXene / carbon dot doping aid.

[0021] Furthermore, modified PP material is used to prepare the outer layer of the water cup, glass is used to prepare the inner layer of the water cup, and LSR is used to prepare the heat insulation buffer layer at the bottom of the water cup.

[0022] In order to better achieve the purpose of the present invention, the present invention also provides a high-temperature resistant and environmentally friendly material for a water cup.

[0023] Compared to existing technologies, this invention offers the following advantages: the "self-assembly followed by modification" and "slit ultrasonic treatment" processes for hydroxyapatite microspheres assembled from fish scale gelatin and chitosan, as well as the MXene / carbon dot composite doping method, are key to optimizing the performance of the PP substrate. The high-temperature-resistant, environmentally friendly material produced by this invention meets high-temperature requirements while also offering advantages such as high mechanical strength, safety, and environmental friendliness. Using this material to form the outer layer of a drinking glass, combined with the outer glass layer and the LSR layer at the bottom of the glass, further enhances the advantages of the drinking glass, resulting in an overall cup that is corrosion-resistant, lightweight, strong, and safe. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, 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 part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1

[0026] 1. Preparation of modified PP materials:

[0027] 1.1. First, prepare fish scale gelatin-chitosan assembled hydroxyapatite microspheres: A. Dissolve fish scale gelatin powder (tilapia scale gelatin powder) in deionized water at 45°C to prepare a 12%wt fish scale gelatin solution; add 0.5%wt citric acid solution to the fish scale gelatin solution until the pH value is 5.0, and then stir at 50°C for 1.5h to obtain a modified fish scale gelatin solution; B. Dissolve chitosan in 1% acetic acid solution to prepare a 2.2%wt chitosan solution; mix the modified fish scale gelatin solution and chitosan solution in a volume ratio of 3:1. The mixture was stirred at 45°C for 2 h, and then the pH was adjusted to 6.2 to obtain a modified fish scale gelatin-chitosan solution. C. Hydroxyapatite (200 mesh) was mixed with the modified fish scale gelatin-chitosan solution in a mass ratio of 1:5 and spray-dried to form fish scale gelatin-chitosan hydroxyapatite microspheres. Spray drying parameters included an atomization pressure of 0.22 MPa, a feed rate of 20 mL / min, an inlet air temperature of 155°C, and an outlet air temperature of 80°C. Sieving yielded 30-40 μm fish scale gelatin-chitosan hydroxyapatite microspheres. The fish scale gelatin-chitosan hydroxyapatite microspheres were then subjected to ultrahigh pressure modification at 165 MPa. Subsequently, they were subjected to slot ultrasonic modification. The slot ultrasonic modification parameters were controlled as follows: ultrasonic power density of 180 w / L, ultrasonic frequency of 25 kHz, ultrasonic treatment time of 10 min, and room temperature. Finally, it was frozen, and the freezing treatment parameters were: temperature -5℃, 20min.

[0028] 1.2. Subsequently, a MXene / carbon dot doping agent was prepared: 1) 9.62 parts of ethylenediamine was dissolved in deionized water to prepare a 13% wt ethylenediamine solution, and 3.24 parts of cellulose nanocrystals (CNCs) were added. The mixture was then hydrothermally reacted at 220°C for 4 h and centrifuged to obtain a filtrate. The filtrate was then dialyzed (molecular weight cutoff 400-800 Da), and the product was freeze-dried to obtain carbon dots. 2) MXene was added to deionized water to prepare a 0.3% wt MXene dispersion. The carbon dots were slowly added to the MXene dispersion at a mass ratio of MXene to carbon dots of 0.1:1. The mixture was magnetically stirred for 2.2 h and dried to form the MXene / carbon dot doping agent.

[0029] 1.3. Next, 220 parts of PP masterbatch, 56.7 parts of ultrahigh-pressure modified hydroxyapatite microspheres assembled from fish scale gelatin and chitosan, and 9.6 parts of MXene / carbon doping additive were added to a twin-screw extruder. The extrusion temperatures were set to 180-200°C (first section), 200-220°C (second section), and 210-230°C (third section). The materials were blended, melted, and extruded to obtain modified PP.

[0030] 2. Use the injection molding process to form a 3.6mm modified PP layer on the outside of the 1.2mm glass layer, use the spraying process to coat LSR (liquid silicone rubber) on the bottom of the glass layer, and then use the vulcanization and curing process to form a 0.9mm LSR layer on the bottom of the glass layer.

[0031] Example 2

[0032] 1. Preparation of modified PP materials:

[0033] 1.1. First, prepare fish scale gelatin-chitosan assembled hydroxyapatite microspheres: A. Dissolve fish scale gelatin powder (tilapia scale gelatin powder) in deionized water at 55°C to prepare 8.5%wt fish scale gelatin solution; add 2%wt citric acid solution to the fish scale gelatin solution until the pH value is 4.0, and then stir at 55°C for 1 hour to obtain modified fish scale gelatin solution; B. Dissolve chitosan in 1% acetic acid solution to prepare 3%wt chitosan solution; mix the modified fish scale gelatin solution and chitosan solution in a volume ratio of 2:1, 5 The mixture was stirred at 5°C for 1.2 h, after which the pH was adjusted to 6.6 to obtain a modified fish scale gelatin-chitosan solution. C. Hydroxyapatite (300 mesh) was mixed with the modified fish scale gelatin-chitosan solution in a mass ratio of 1:7 and spray-dried to form fish scale gelatin-chitosan hydroxyapatite microspheres. Spray drying parameters included an atomization pressure of 0.18 MPa, a feed rate of 30 mL / min, an inlet air temperature of 145°C, and an outlet air temperature of 90°C. Sieving yielded 30-40 μm fish scale gelatin-chitosan hydroxyapatite microspheres. The fish scale gelatin-chitosan hydroxyapatite microspheres were then subjected to ultrahigh pressure modification at 230 MPa. Subsequently, they were subjected to slot ultrasonic modification. The slot ultrasonic modification parameters were controlled as follows: ultrasonic power density of 200 w / L, ultrasonic frequency of 30 kHz, ultrasonic treatment time of 7 min, and room temperature. Finally, it was frozen, and the freezing treatment parameters were: temperature 0℃, 15min.

[0034] 1.2. Subsequently, a MXene / carbon dot doping agent was prepared: 1) 14.42 parts of ethylenediamine was dissolved in deionized water to prepare a 9% wt ethylenediamine solution, and then 6.49 parts of cellulose nanocrystals (CNCs) were added. The mixture was then subjected to a hydrothermal reaction at 200°C for 8 h and centrifuged to obtain a filtrate. The filtrate was then dialyzed (molecular weight cutoff 400-800 Da) and the product was freeze-dried to obtain carbon dots. 2) MXene was added to deionized water to prepare a 0.1% wt MXene dispersion. The carbon dots were slowly added to the MXene dispersion at a mass ratio of MXene to carbon dots of 0.3:1. The mixture was magnetically stirred for 1.5 h and dried to form the MXene / carbon dot doping agent.

[0035] 1.3. Next, 350 parts of PP masterbatch, 40.8 parts of ultrahigh-pressure modified hydroxyapatite microspheres assembled from fish scale gelatin and chitosan, and 15.5 parts of MXene / carbon doping additive were added to a twin-screw extruder. The extrusion temperatures were set to 180-200°C (first section), 200-220°C (second section), and 210-230°C (third section). The materials were blended, melted, and extruded to produce modified PP.

[0036] 2. Use the injection molding process to form a 5.3mm modified PP layer on the outside of the 2.0mm glass layer, use the spraying process to coat LSR (liquid silicone rubber) on the bottom of the glass layer, and then use the vulcanization and curing process to form a 1.2mm LSR layer on the bottom of the glass layer.

[0037] Example 3

[0038] 1. Preparation of modified PP materials:

[0039] 1.1. First, prepare fish scale gelatin-chitosan assembled hydroxyapatite microspheres: A. Dissolve fish scale gelatin powder (tilapia scale gelatin powder) in deionized water at 48°C to prepare a 10.6%wt fish scale gelatin solution; add 1%wt citric acid solution to the fish scale gelatin solution until the pH value reaches 4.5, and then stir continuously at 52°C for 1.2h to obtain a modified fish scale gelatin solution; B. Dissolve chitosan in 1% acetic acid solution to prepare a 2.5%wt chitosan solution; and mix the modified fish scale gelatin solution and chitosan solution in a volume ratio of 2.3:1. The mixture was stirred at 50°C for 2 h, and then the pH was adjusted to 6.5 to obtain a modified fish scale gelatin-chitosan solution. C. Hydroxyapatite (200 mesh) was mixed with the modified fish scale gelatin-chitosan solution in a mass ratio of 1:6 and spray-dried to form fish scale gelatin-chitosan hydroxyapatite microspheres. Spray drying parameters included an atomization pressure of 0.20 MPa, a feed rate of 22 mL / min, an inlet air temperature of 148°C, and an outlet air temperature of 85°C. Sieving yielded 30-40 μm fish scale gelatin-chitosan hydroxyapatite microspheres. The fish scale gelatin-chitosan hydroxyapatite microspheres were then subjected to ultrahigh pressure modification at 175 MPa. Subsequently, they were subjected to slot ultrasonic modification. The slot ultrasonic modification parameters were controlled as follows: ultrasonic power density of 190 w / L, ultrasonic frequency of 26 kHz, ultrasonic treatment time of 6 min, and room temperature. Finally, it was frozen, and the freezing treatment parameters were: temperature -2°C, 16 minutes.

[0040] 1.2. Subsequently, a MXene / carbon dot doping agent was prepared: 1) 12.02 parts of ethylenediamine was dissolved in deionized water to prepare a 10% wt ethylenediamine solution, and then 5.03 parts of cellulose nanocrystals (CNCs) were added. The mixture was then hydrothermally reacted at 215°C for 4.5 h and centrifuged to obtain a filtrate. The filtrate was then dialyzed (molecular weight cutoff 400-800 Da), and the product was freeze-dried to obtain carbon dots. 2) MXene was added to deionized water to prepare a 0.25% wt MXene dispersion. The carbon dots were slowly added to the MXene dispersion at a mass ratio of MXene to carbon dots of 0.22:1. The mixture was magnetically stirred for 1.8 h and dried to form the MXene / carbon dot doping agent.

[0041] 1.3. Next, 315 parts of PP masterbatch, 44.9 parts of ultrahigh-pressure modified hydroxyapatite microspheres assembled from fish scale gelatin and chitosan, and 12.5 parts of MXene / carbon doping additive were added to a twin-screw extruder. The extrusion temperatures were set to 180-200°C (first section), 200-220°C (second section), and 210-230°C (third section). The materials were blended, melted, and extruded to obtain modified PP.

[0042] 2. Use the injection molding process to form a 5.0mm modified PP layer on the outside of the 1.5mm glass layer, use the spraying process to coat LSR (liquid silicone rubber) on the bottom of the glass layer, and then use the vulcanization and curing process to form a 1mm LSR layer on the bottom of the glass layer.

[0043] Comparative Example 1: Compared with Example 3, the difference is that in the process of preparing fish scale gelatin-chitosan assembled hydroxyapatite microspheres, the raw materials are first modified and then formed into spheres (step 1.1), and the other steps are the same.

[0044] 1.1. Dissolve fish scale gelatin powder (tilapia scale gelatin powder) in 48°C deionized water to prepare a 10.6% wt fish scale gelatin solution. Add 1% wt citric acid solution to the fish scale gelatin solution until the pH reaches 4.5, then stir at 52°C for 1.2 hours to obtain a modified fish scale gelatin solution. Dissolve chitosan in 1% acetic acid solution to prepare a 2.5% wt chitosan solution. Mix the modified fish scale gelatin solution with the chitosan solution in a volume ratio of 2.3:1, stir at 50°C for 2 hours, and then adjust the pH to 6.5 to obtain a modified fish scale gelatin-chitosan solution. Hydroxyapatite (200 mesh particle size) is mixed with the modified fish scale gelatin-chitosan solution in a mass ratio of 1:6. The mixture is then subjected to ultrahigh pressure treatment at 175 MPa. The resulting slit-ultrasonic modification process was then performed under the following parameters: ultrasonic power density of 190 w / L, ultrasonic frequency of 26 kHz, ultrasonic treatment time of 6 minutes, and room temperature. Fish scale gelatin-chitosan hydroxyapatite microspheres were then self-assembled using spray drying. The spray drying parameters included an atomization pressure of 0.20 MPa, a feed rate of 22 mL / min, an inlet air temperature of 148°C, and an outlet air temperature of 85°C. Sieving yielded 30-40 μm fish scale gelatin-chitosan hydroxyapatite microspheres. Finally, the slit-ultrasonic modification process was performed under the following parameters: an ultrasonic power density of 190 w / L, an ultrasonic frequency of 26 kHz, a treatment time of 6 minutes, and room temperature. The slit-ultrasonic modification process was then performed under the following parameters: a temperature of -2°C and a duration of 16 minutes.

[0045] Comparative Example 2: Compared with Example 3, the difference is that the hydroxyapatite microspheres assembled with fish scale gelatin-chitosan are not subjected to slit ultrasonic modification treatment, and the other steps are the same.

[0046] Comparative Example 3: Compared with Example 3, the difference is that the fish scale gelatin-chitosan assembled hydroxyapatite microspheres are replaced by fish scale gelatin-chitosan-hydroxyapatite blend, and the preparation method is:

[0047] 1.1. Dissolve fish scale gelatin powder (tilapia scale gelatin powder) in 48°C deionized water to prepare a 10.6% wt fish scale gelatin solution. Add 1% wt citric acid solution to the fish scale gelatin solution until the pH reaches 4.5. Stir continuously at 52°C for 1.2 hours to obtain a modified fish scale gelatin solution. Dissolve chitosan in 1% acetic acid solution to prepare a 2.5% wt chitosan solution. The modified fish scale gelatin solution, chitosan solution, and hydroxyapatite are directly mixed. The volume ratio of the modified fish scale gelatin solution to the chitosan solution is 2.3:1, and the mass ratio of the hydroxyapatite to the total mass of the fish scale gelatin and chitosan solution is 1:6. The mixture is then subjected to ultrahigh pressure modification at 175 MPa. Slit ultrasonic modification is then performed. The parameters for the slit ultrasonic modification are: ultrasonic power density of 190 w / L, ultrasonic frequency of 26 kHz, ultrasonic treatment time of 6 minutes, and room temperature. Finally, it was frozen, and the freezing treatment parameters were: temperature -2°C, 16 minutes.

[0048] Comparative Example 4: Compared with Example 3, the difference is that the Mxene / carbon dot doping agent is replaced by separated Mxene and carbon dots, that is, no doping form is formed, and the other steps are the same.

[0049] 1.1. Same as Example 3.

[0050] 1.2 Preparation of carbon dots: Dissolve 12.02 parts of ethylenediamine in deionized water to prepare a 10% wt ethylenediamine solution, then add 5.03 parts of cellulose nanocrystals (CNCs). The mixture is hydrothermally reacted at 215°C for 4.5 hours and centrifuged to obtain a filtrate. The filtrate is then dialyzed (molecular weight cutoff 400-800 Da) and the product is freeze-dried to obtain carbon dots.

[0051] 1.3. Next, 315 parts of PP masterbatch, 44.9 parts of ultrahigh-pressure modified hydroxyapatite microspheres assembled from fish scale gelatin and chitosan, 2.25 parts of MXene, and 10.25 parts of carbon dots were added to a twin-screw extruder. The extrusion temperatures were set at 180-200°C (first section), 200-220°C (second section), and 210-230°C (third section). The materials were blended, melted, and extruded to obtain modified PP.

[0052] Experimental Example The modified PP materials prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were injection molded to obtain test specimens with a size of 80 mm × 10 mm × 4 mm, and the following performance tests were performed:

[0053] 1. Heat deformation temperature (GB / T 1634.1-2019, 1.82MPa load).

[0054] 2. Tensile properties (GB / T 1040.2-2022, tensile rate 250 mm / min).

[0055] 3. Antioxidation performance (GB / T 7141-2008, after accelerated aging treatment (temperature 90°C, time 500h), the tensile strength of the specimens was tested again).

[0056] 4. Bending properties (GB / T 9341-2008).

[0057] The results are shown in Table 1.

[0058] Table 1 Performance test table

[0059]

[0060] As can be seen from Example 3 (spheroidization followed by modification) and Comparative Example 1 (modification followed by spheroidization), Example 3 exhibits higher heat distortion temperature, tensile strength, aging resistance, and flexural strength than Comparative Example 1. This suggests that self-assembly into microspheres followed by modification using ultrahigh pressure and slit ultrasound can enhance the bonding between the hydroxyapatite microspheres assembled from fish scale gelatin and chitosan and the PP substrate, thereby improving the material's heat distortion temperature, tensile strength, aging resistance, and flexural strength.

[0061] It can be seen from Example 3 and Comparative Example 2 that the heat deformation temperature, tensile strength, and flexural strength of Comparative Example 2 are all lower than those of Example 3. This indicates that slit ultrasonic modification is beneficial to improving the dispersibility and interfacial bonding strength of hydroxyapatite microspheres assembled with fish scale gelatin-chitosan, thereby improving the heat deformation temperature, tensile strength, aging resistance, and flexural strength of the material.

[0062] As can be seen from Example 3 and Comparative Example 3, when the microspheres are replaced with a blend of fish scale gelatin, chitosan, and hydroxyapatite in Comparative Example 3, the heat deformation temperature, tensile strength, and flexural strength are significantly reduced, and the performance decays significantly after aging. This suggests that self-assembled microspheres can further exert a synergistic enhancement effect by enhancing the internal network structure compared to dispersed and disordered blends, thereby improving the heat deformation temperature, tensile strength, aging resistance, and flexural strength of the material.

[0063] As can be seen from Example 3 and Comparative Example 4, the heat deformation temperature, tensile strength, and flexural strength of Comparative Example 4 are all lower than those of Example 3. This indicates that the doping structure of MXene and carbon dots is beneficial for improving the overall dispersion and enhancing the bonding performance with the PP substrate, thereby improving the heat deformation temperature, tensile strength, aging resistance, and flexural strength of the material.

[0064] Therefore, the "self-assembly into spheres first and then modification" and "slit ultrasonic treatment" processes of fish scale gelatin-chitosan assembled hydroxyapatite microspheres, as well as the composite doping form of MXene / carbon dots, are the key to the performance optimization of PP substrate.

[0065] The high-temperature-resistant, environmentally friendly material produced by this invention can meet high-temperature requirements while also offering advantages such as high mechanical strength, safety, and environmental friendliness. Using this material to create the outer layer of a drinking glass, combined with the outer glass and the LSR (liquid silicone rubber) layer at the bottom of the glass, can amplify the advantages of the drinking glass, making the entire cup corrosion-resistant, lightweight, high-strength, and safe.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A high temperature resistant environmentally friendly material for a water cup, characterized in that: The modified PP material is prepared from the following raw materials in parts by weight: 220-350 parts of PP masterbatch, 40.8-56.7 parts of ultra-high pressure modified hydroxyapatite microspheres assembled with fish scale gelatin-chitosan, and 9.6-15.5 parts of MXene / carbon doping additives; wherein the ultra-high pressure modified hydroxyapatite microspheres assembled with fish scale gelatin-chitosan are prepared by first subjecting pre-spherical fish scale gelatin-chitosan assembled hydroxyapatite microspheres to high pressure modification, then to slit ultrasonic modification, and finally to freezing.

2. The high temperature resistant and environmentally friendly material for water cups according to claim 1, characterized in that: The preparation method of fish scale gelatin-chitosan assembled hydroxyapatite microspheres is as follows: A. Dissolve fish scale gelatin powder in deionized water at 45-55°C to prepare 8.5-12%wt fish scale gelatin solution; add 0.5-2%wt citric acid solution to the fish scale gelatin solution until the pH value reaches 4.0-5.0, and then continue stirring at 50-55°C for 1-1.5 hours to obtain a modified fish scale gelatin solution; B. Dissolve chitosan in acetic acid solution to prepare a 2.2-3% wt chitosan solution; The modified fish scale gelatin solution and the chitosan solution were mixed in a volume ratio of 2-3:1, stirred at 45-55°C for 1.2-2.4 hours, and then the pH value was adjusted to 6.2-6.6 to obtain a modified fish scale gelatin-chitosan solution; C. Mix hydroxyapatite with modified fish scale gelatin-chitosan solution in a mass ratio of 1:5-7, and then self-assemble to form fish scale gelatin-chitosan assembled hydroxyapatite microspheres.

3. The high temperature resistant and environmentally friendly material for water cups according to claim 1, characterized in that: In step C, the particle size of hydroxyapatite is 200-300 mesh.

4. The high temperature resistant and environmentally friendly material for a water cup according to claim 1, characterized in that: In step C, fish scale gelatin-chitosan assembled hydroxyapatite microspheres are self-assembled by spray drying; spray drying parameters are: atomization pressure 0.18~0.22MPa, feed rate 20~30mL / min, inlet air temperature 145~155℃, outlet air temperature 80~90℃, and 30~40μm fish scale gelatin-chitosan assembled hydroxyapatite microspheres are obtained by screening.

5. The high temperature resistant and environmentally friendly material for water cups according to claim 1, characterized in that: The high-pressure modification treatment steps are: performing ultra-high pressure modification treatment on the hydroxyapatite microspheres assembled with fish scale gelatin-chitosan at 165~230MPa.

6. The high temperature resistant and environmentally friendly material for water cups according to claim 1, characterized in that: The parameters of the slit ultrasonic modification treatment are controlled as follows: ultrasonic power density of 180~200w / L; ultrasonic frequency of 25~30kHz; ultrasonic treatment time of 6~10min; room temperature.

7. The high temperature resistant and environmentally friendly material for water cups according to claim 1, characterized in that: The freezing treatment parameters are: temperature -5~0℃, 15~20min.

8. The high temperature resistant and environmentally friendly material for water cups according to claim 1, characterized in that: The fish scale gelatin is tilapia fish scale gelatin.

9. The high temperature resistant environmentally friendly material for a water cup according to any one of claims 1 to 8, characterized in that: The preparation method of MXene / carbon dot doping additive is as follows: 1) First, 9.62-14.42 parts of ethylenediamine were dissolved in deionized water to prepare a 9-13% wt ethylenediamine solution, followed by the addition of 3.24-6.49 parts of cellulose nanocrystals. The solution was then hydrothermally reacted at 200-220°C for 4-8 hours and centrifuged to obtain a filtrate. The filtrate was then dialyzed and the product was freeze-dried to obtain carbon dots. 2) MXene was added to deionized water to prepare a 0.1-0.3% wt MXene dispersion. The carbon dots were slowly added to the MXene dispersion at a MXene to carbon dot mass ratio of 0.1-0.3:

1. The mixture was magnetically stirred for 1.5-2.2 hours and dried to form a MXene / carbon dot doping aid.

10. The high temperature resistant environmentally friendly material for water cups according to claim 9, characterized in that: The outer layer of the water cup is made of modified PP material, the inner layer of the water cup is made of glass, and the thermal insulation buffer layer at the bottom of the water cup is made of LSR.

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