Preparation method of high-flame-retardant composite material for new energy automobile
A composite material for new energy vehicles is prepared by treating bamboo fibers with zinc chloride and diammonium hydrogen phosphate solutions, enhancing flame retardancy and wear resistance, addressing the limitations of polypropylene and expanding its use in new energy vehicles.
Patent Information
- Application Number
- CN202411440759.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2024-12-10
AI Technical Summary
Existing polypropylene materials used in new energy vehicles are prone to deformation and burning at high temperatures, and adapting alternative materials is time-consuming and costly, limiting their utilization in new energy vehicles.
A method involving the preparation of a composite material using polypropylene resin, glass fiber, regenerated cellulose fiber, bamboo fiber, zinc chloride solution, and diammonium hydrogen phosphate solution, where bamboo fibers are treated with these chemicals to enhance flame retardancy, and the mixture is processed through specific stirring and extrusion steps.
The composite material achieves improved flame retardancy and wear resistance, expanding its applicability and suitability for new energy vehicles by leveraging the synergistic effects of the treated bamboo fibers and other components.
Smart Images
Figure CN119101307A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of new energy vehicles, and specifically relates to a method for preparing a highly flame-retardant composite material for new energy vehicles. Background Art
[0002] In order to solve the increasingly serious energy and environmental problems, energy conservation and emission reduction are increasingly valued by countries around the world. The best solution to the environmental pollution caused by automobiles is to vigorously develop new energy vehicles, especially electric vehicles. With the widespread development of new energy vehicles, plastic shells such as battery components have put forward new requirements for materials, requiring them not only to have extremely high mechanical properties, but also to have good flame retardancy, fire resistance and processing fluidity.
[0003] In the prior art, the most commonly used material is polypropylene, which has the advantages of good chemical resistance, strong elasticity and toughness, and is relatively cheap and easy to obtain, which makes it used in large quantities. However, polypropylene is easily oxidized, and when polypropylene encounters high temperatures, it will not only deform but also burn. This leads to certain limitations when using polypropylene materials in new energy vehicles, resulting in the inability to fully utilize the advantages of polypropylene materials. If other materials are used, adaptation tests are required, which consumes time and money, and cannot guarantee the production cost and the adaptability of the new materials. Summary of the invention
[0004] The purpose of the present invention is to provide a method for preparing a highly flame-retardant composite material for new energy vehicles to solve the problems raised in the above background technology.
[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: a method for preparing a highly flame-retardant composite material for new energy vehicles, wherein the material formula based on the method for preparing the highly flame-retardant composite material is: three kilograms of polypropylene resin, one and a half kilograms of glass fiber, 0.5 kilograms of regenerated cellulose fiber, 0.2 kilograms of bamboo fiber, 0.2 kilograms of zinc chloride solution, and 0.1 kilogram of diammonium hydrogen phosphate solution.
[0006] Preferably, the method for preparing the highly flame retardant composite material is:
[0007] S1, preliminary preparation: first prepare all kinds of materials, and clean and wipe the reaction kettle, stirring vessel, etc. to ensure that the reaction kettle and stirring vessel are in a dry and clean state when in use;
[0008] S2. Preliminary fusion: First, place the mixing vessel flat. Then place the bamboo fiber in it, and then add the zinc chloride solution into the mixing vessel. Let it stand for five minutes, and then stir it at a speed of thirty times per minute, so that the bamboo fiber can better absorb the zinc chloride solution;
[0009] S3: Drying for standby use: Take out the bamboo fiber that has absorbed the zinc chloride solution, then place it on a glass plate, and then place it in a drying device to air dry it, so that the bamboo fiber can better combine with the zinc chloride solution, thereby improving the flame retardancy of the bamboo fiber;
[0010] S4: Secondary fusion: After the bamboo fiber is dried, place the bamboo fiber in the stirring container again, and then pour the diammonium hydrogen phosphate solution into it. After the placement is completed, let it stand for three minutes, and then stir it at a speed of twenty times per minute to ensure that the bamboo fiber can absorb the diammonium hydrogen phosphate solution;
[0011] S5: air drying again: when the bamboo fiber has completely absorbed the diammonium hydrogen phosphate solution, the bamboo fiber is taken out and placed on a glass plate, and then placed into the drying device again to air dry the bamboo fiber;
[0012] S6: Mix the materials, place the polypropylene resin into the reactor, then place the glass fiber into the reactor, and then stir at a speed of 80 revolutions per minute for 10 minutes, so that the glass fiber can be completely dispersed in the polypropylene resin;
[0013] S7: Material addition: Place the regenerated cellulose fiber and the dried bamboo fiber into the reactor in turn, and then stir again at a speed of 100 revolutions per minute. Each time the material is added, stir for ten minutes to ensure that the material can be fully dispersed in the polypropylene resin;
[0014] S8: Material preparation: The mixed solution prepared in S7 is placed inside the extruder, and then the material is prepared into particles. The heating temperature of the extruder is 200 to 240 degrees, and the temperature of the extruder head is 250 to 300 degrees.
[0015] Preferably, in the step S2, when the bamboo fiber absorbs the zinc chloride solution, after the bamboo fiber is placed in the stirring vessel, it is necessary to spread the bamboo fiber flat by a glass rod so that the bamboo fiber is spread to the bottom of the stirring vessel, and then the zinc chloride solution is slowly dripped into the stirring vessel through the glass rod, so that the zinc chloride solution can better wrap the bamboo fiber, so that the bamboo fiber can better absorb the zinc chloride solution.
[0016] Preferably, in the step S4, when the bamboo fiber absorbs the diammonium hydrogen phosphate solution, the dry bamboo fiber needs to be spread flat on the bottom of the stirring vessel, and then the diammonium hydrogen phosphate solution is slowly dripped into the stirring vessel through a glass rod, so that the diammonium hydrogen phosphate solution can better wrap the bamboo fiber, so that the bamboo fiber can better absorb the diammonium hydrogen phosphate solution.
[0017] Preferably, in the steps S3 and S5, the bamboo fibers are air-dried by laying them flat on a glass plate, so that the bamboo fibers inside the drying device can be air-dried more quickly.
[0018] Preferably, the stirring in step S6 is divided into forward rotation and reverse rotation, and every five forward rotations are followed by five reverse rotations, so as to reduce the possibility of glass fiber sticking.
[0019] Preferably, in the step S7, the regenerated cellulose fiber and the bamboo fiber are added. After the regenerated cellulose fiber is added to the polypropylene resin, it is necessary to stir, rotate forward three times and then reverse three times, then add the bamboo fiber and stir again, so that the three fibers can be better mixed with the polypropylene resin.
[0020] Preferably, in the step S8, the prepared mixed solution is placed into the extruder, and the mixed solution needs to be heated by the extruder first to make the mixed solution more viscous, and then the mixed solution is transferred to the inside of the extrusion head, and then the mixed solution is heated by the extrusion head to make the mixed solution become solid, and then the extrusion head is convenient for extruding the finished product.
[0021] The beneficial effects of the present invention are as follows:
[0022] The present invention is researched and developed with respect to high flame retardancy. The various limiters and solutions in the formula have multiple functions, which effectively improve the flame retardancy of the composite material, thereby improving the adaptability of the composite material, increasing the scope of use of the composite material, and making the composite material more suitable for the manufacture of new energy vehicles.
[0023] First, the bamboo fiber is soaked in zinc chloride solution and diammonium hydrogen phosphate solution to improve the flame retardancy of the bamboo fiber. Therefore, when the bamboo fiber is mixed into the polypropylene resin, the flame retardancy of the polypropylene resin can be improved.
[0024] Secondly, glass fiber and regenerated cellulose fiber are mixed into the polypropylene resin so that the glass fiber and regenerated cellulose fiber can fill the polypropylene resin. After the polypropylene resin is made into a finished product, the glass fiber and regenerated cellulose fiber on its surface and inside can block high temperature and fire sources, thereby improving the flame retardancy of the composite material.
[0025] In addition, bamboo fibers are filled inside and outside the polypropylene resin, so that when the composite material encounters friction, the bamboo fibers can improve the wear resistance of the composite material.
[0026] In summary, this highly flame-retardant composite material for new energy vehicles significantly improves the flame retardancy and wear resistance of the composite material through scientific proportioning and multiple three-dimensional synergistic effects, thereby increasing the scope of application of the composite material. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 The following is a production flow chart of the highly flame-retardant composite material of the present invention. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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 creative work are within the scope of protection of the present invention.
[0029] like Figure 1 As shown, an embodiment of the present invention provides a method for preparing a highly flame-retardant composite material for new energy vehicles. The material formula based on the method for preparing the highly flame-retardant composite material is: three kilograms of polypropylene resin, one and a half kilograms of glass fiber, 0.5 kilograms of regenerated cellulose fiber, 0.2 kilograms of bamboo fiber, 0.2 kilograms of zinc chloride solution, and 0.1 kilogram of diammonium hydrogen phosphate solution.
[0030] Example 1: The method for preparing a highly flame-retardant composite material is as follows:
[0031] Prepare 3 kg of polypropylene resin, 1.5 kg of glass fiber, 0.5 kg of regenerated cellulose fiber, 0.2 kg of bamboo fiber, 0.2 kg of zinc chloride solution, and 0.1 kg of diammonium hydrogen phosphate solution;
[0032] Place 0.2 kg of bamboo fiber into the stirring device and spread it flat, then slowly pour 0.2 kg of zinc chloride solution into the stirring device, then let it stand for five minutes, then stir at a speed of thirty times per minute. When the bamboo fiber completely absorbs the zinc chloride solution, dry the bamboo fiber first;
[0033] After drying, the bamboo fiber is placed in the stirring device again, and then the diammonium hydrogen phosphate solution is poured into the stirring device. After standing for three minutes, the stirring is performed at a speed of twenty revolutions per minute. When the bamboo fiber completely absorbs the diammonium hydrogen phosphate solution, the bamboo fiber is air-dried again.
[0034] Then pour the glass fiber into the polypropylene resin, stir it at a speed of 80 revolutions per minute for 10 minutes after adding the glass fiber, then add the regenerated cellulose fiber and bamboo fiber, and then stir it at a speed of 100 revolutions per minute for 10 minutes;
[0035] After the stirring is completed, the mixed solution is placed into the extruder, and then the mixed solution is heated and extruded by the extruder to complete the preparation of the composite material.
[0036] Embodiment 2:
[0037] The difference from Example 1 is:
[0038] The preparation method of the highly flame-retardant composite material includes the following raw materials: 3 kg of polypropylene resin, 1.5 kg of glass fiber, 0.3 kg of regenerated cellulose fiber, 0.1 kg of bamboo fiber, 0.1 kg of zinc chloride solution, and 0.5 kg of diammonium hydrogen phosphate solution; the rest are the same as in Example 1.
[0039] Embodiment 3:
[0040] The difference from Example 1 is:
[0041] The preparation method of the highly flame-retardant composite material includes the following raw materials: 3 kg of polypropylene resin, 1 kg of glass fiber, 0.2 kg of regenerated cellulose fiber, 0.3 kg of bamboo fiber, 0.3 kg of zinc chloride solution, and 0.5 kg of diammonium hydrogen phosphate solution; the rest are the same as in Example 1.
[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A method for preparing a highly flame-retardant composite material for new energy vehicles, characterized in that: The material formula based on the preparation method of high flame retardant composite materials is: 3 kg of polypropylene resin, 1.5 kg of glass fiber, 0.5 kg of regenerated cellulose fiber, 0.2 kg of bamboo fiber, 0.2 kg of zinc chloride solution, and 0.1 kg of diammonium hydrogen phosphate solution.
2. The method for preparing a highly flame-retardant composite material for new energy vehicles according to claim 1, characterized in that: The preparation method of the highly flame-retardant composite material is as follows: S1, preliminary preparation: first prepare all kinds of materials, and clean and wipe the reactor and stirring vessel to ensure that the reactor and stirring vessel are in a dry and clean state when in use; S2. Preliminary fusion: First, place the mixing vessel flat. Then place the bamboo fiber in it, and then add the zinc chloride solution into the mixing vessel. Let it stand for five minutes, and then stir it at a speed of thirty times per minute, so that the bamboo fiber can better absorb the zinc chloride solution. S3: Drying for standby use: The bamboo fiber that has absorbed the zinc chloride solution is taken out, and then placed on a glass plate, and then placed in a drying device to air dry it, so that the bamboo fiber can be better combined with the zinc chloride solution, thereby improving the flame retardancy of the bamboo fiber; S4: Secondary fusion: After the bamboo fiber is dried, the bamboo fiber is placed in the stirring container again, and then the diammonium hydrogen phosphate solution is poured into it. After the placement is completed, it is first allowed to stand for three minutes, and then stirred at a speed of twenty times per minute to ensure that the bamboo fiber absorbs the diammonium hydrogen phosphate solution; S5: air drying again: when the bamboo fiber has completely absorbed the diammonium hydrogen phosphate solution, the bamboo fiber is taken out and placed on a glass plate, and then placed into the drying device again to air dry the bamboo fiber; S6: Mix the materials, place the polypropylene resin into the reactor, then place the glass fiber into the reactor, and then stir at a speed of 80 revolutions per minute for 10 minutes to allow the glass fiber to be completely dispersed into the polypropylene resin; S7: Material addition: Place the regenerated cellulose fiber and the dried bamboo fiber into the reactor in turn, and then stir again at a speed of 100 revolutions per minute. Each time the material is added, stir for ten minutes to ensure that the material is fully dispersed in the polypropylene resin; S8: Material preparation: The mixed solution prepared in S7 is placed inside the extruder, and then the material is prepared into particles. The heating temperature of the extruder is 200 to 240 degrees, and the temperature of the extruder head is 250 to 300 degrees.
3. The method for preparing a highly flame-retardant composite material for new energy vehicles according to claim 2, characterized in that: In the step S2, when the bamboo fiber absorbs the zinc chloride solution, after the bamboo fiber is placed in the stirring vessel, it is necessary to spread the bamboo fiber flat by a glass rod so that the bamboo fiber is spread flat to the bottom of the stirring vessel, and then the zinc chloride solution is slowly dripped into the stirring vessel through the glass rod so that the zinc chloride solution can better wrap the bamboo fiber, so that the bamboo fiber can better absorb the zinc chloride solution.
4. The method for preparing a highly flame-retardant composite material for new energy vehicles according to claim 2, characterized in that: In the step S4, when the bamboo fiber absorbs the diammonium hydrogen phosphate solution, the dry bamboo fiber needs to be spread flat on the bottom of the stirring vessel, and then the diammonium hydrogen phosphate solution is slowly dripped into the stirring vessel through a glass rod, so that the diammonium hydrogen phosphate solution can better wrap the bamboo fiber, so that the bamboo fiber can better absorb the diammonium hydrogen phosphate solution.
5. The method for preparing a highly flame-retardant composite material for new energy vehicles according to claim 2, characterized in that: In the steps S3 and S5, the bamboo fibers are air-dried and the bamboo fibers need to be laid flat on a glass plate so that the bamboo fibers inside the drying device can be air-dried more quickly.
6. The method for preparing a highly flame-retardant composite material for new energy vehicles according to claim 2, characterized in that: The stirring in step S6 is divided into forward rotation and reverse rotation. For every five forward rotations, the stirring is reversed five times to reduce the possibility of glass fiber sticking.
7. The method for preparing a highly flame-retardant composite material for new energy vehicles according to claim 2, characterized in that: In the step S7, the regenerated cellulose fiber and the bamboo fiber are added. After the regenerated cellulose fiber is added to the polypropylene resin, it is necessary to stir it, rotate forward three times and then reverse three times, then add the bamboo fiber and stir it again, so that the three fibers can be better mixed with the polypropylene resin.
8. The method for preparing a highly flame-retardant composite material for new energy vehicles according to claim 1, characterized in that: In the step S8, the prepared mixed solution is placed into the extruder, and the mixed solution needs to be heated by the extruder first to make the mixed solution more viscous, and then the mixed solution is transferred to the extrusion head, and then the mixed solution is heated by the extrusion head to make the mixed solution solid, and then the extrusion head is convenient for extruding the finished product.