Pei modified high polymer material and preparation method thereof

Abstract

The invention discloses a pei modified high polymer material and a preparation method thereof. The pei modified high polymer material comprises the following components in parts by weight: 80-90 parts of PEI resin, 2-5 parts of nano silicon dioxide, 0.5-2 parts of an ultraviolet light absorber and light stabilizer composite additive, 0.1-1 part of an antistatic agent, 0.1-1% of an antioxidant and 0.1-2 parts of a lubricant. Through cooperative use of the nano silicon dioxide, the ultraviolet light absorber and the light stabilizer compound additive, micropores and defects in the material are filled with the nano silicon dioxide, and the compactness and barrier property of the material are enhanced, so that the water absorption is reduced, and the service life of the material is prolonged. The composite additive of the ultraviolet light absorber and the light stabilizer can simultaneously absorb ultraviolet light, convert the ultraviolet light into harmless heat and release the heat, and can prevent or delay macromolecular chain breakage or cross-linking reaction caused by light, so that the weather resistance of the material is improved, the aging of the material is prevented, and the service life of the material is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of PEI modified polymer materials, in particular to a PEI modified polymer material and a preparation method thereof. Background Art

[0002] PEI (polyetherimide) modified polymer materials are modified by physical or chemical methods to improve its performance or give it new functions to meet specific application requirements;

[0003] Polyetherimide (PEI) is a high-performance amorphous polymer with excellent properties such as high strength, heat resistance, and chemical stability. It has been widely used in many fields.

[0004] When existing PEI-modified polymer materials are used in outdoor water treatment, they are exposed to the outdoors for a long time and need to withstand ultraviolet radiation and rain erosion. However, existing PEI-modified polymer materials have poor weather resistance and are water-absorbent. After absorbing water, they are likely to accelerate material aging and damage, thereby shortening their service life.

[0005] Therefore, we proposed a PEI-modified polymer material and a preparation method thereof. Summary of the Invention

[0006] The purpose of the present invention is to provide a PEI-modified polymer material and a preparation method thereof, which solves the problems raised in the background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a PEI-modified polymer material and a preparation method thereof, comprising the following components by weight:

[0008] 80-90 parts of PEI resin, 2-5 parts of nano-silicon dioxide, 0.5-2 parts of ultraviolet absorber and light stabilizer composite auxiliary agent, 0.1-1 part of antistatic agent, 0.1-1% of antioxidant, and 0.1-2 parts of lubricant.

[0009] As a preferred embodiment of the present invention, the composition comprises the following components by weight: 85 parts of PEI resin, 3 parts of nano-silicon dioxide, 1.5 parts of ultraviolet absorber and light stabilizer composite auxiliary agent, 0.5 parts of antistatic agent, 0.2% of antioxidant, and 0.3 parts of lubricant.

[0010] As a preferred embodiment of the present invention, the composition comprises the following components by weight: 90 parts of PEI resin, 2 parts of nano-silicon dioxide, 1 part of ultraviolet absorber and light stabilizer composite auxiliary agent, 0.1 part of antistatic agent, 0.3% of antioxidant, and 0.2 part of lubricant.

[0011] As a preferred embodiment of the present invention, the composition comprises the following components by weight: 80 parts of PEI resin, 5 parts of nano-silicon dioxide, 2 parts of ultraviolet absorber and light stabilizer composite auxiliary agent, 0.5 parts of antistatic agent, 0.5% of antioxidant, and 0.3 parts of lubricant.

[0012] The present invention also relates to a method for preparing a PEI-modified polymer material, comprising the following steps:

[0013] Step 1: Dry the PEI resin in a drying oven at 80-100°C for 2-4 hours, dry the nano-silica in a vacuum oven at 120°C for 4-6 hours for activation, and accurately weigh the UV absorber and light stabilizer composite additives, antistatic agent, antioxidant, and lubricant according to the formula ratio for later use;

[0014] Step 2: Add the dried PEI resin to a high-speed mixer and preheat it at a speed of 1000-1500 rpm for 5-10 minutes. Then, add nano-silica, ultraviolet absorber and light stabilizer composite additives, antistatic agent and antioxidant, and lubricant in sequence. Continue mixing for 15-20 minutes to ensure that all components are fully and evenly mixed.

[0015] Step 3: Add the mixed materials into a twin-screw extruder at a temperature of 280-350°C to melt and plasticize the materials in the extruder. After the shearing and mixing action of the screw, the materials are further evenly mixed and then extruded into materials through the extruder die head.

[0016] Step 4: The extruded strip material is cooled in a cooling water tank to solidify and then cut into pellets by a pelletizer to obtain modified PEI polymer material particles;

[0017] Step 5: Dry the material particles obtained in step 4 in a drying oven at 60-80° C. for 2-3 hours to remove surface moisture.

[0018] As a preferred embodiment of the present invention, the temperature of the cooling water tank is 10-20°C.

[0019] As a preferred embodiment of the present invention, the pellets cut out by the pelletizer have a length of 2-5 mm.

[0020] As a preferred embodiment of the present invention, the temperature gradient of adjacent zones of the twin-screw extruder does not exceed 20°C.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention uses nano-silica in combination with a UV absorber and a light stabilizer composite auxiliary agent. The nano-silica fills micropores and defects in the material, enhancing the material's density and barrier properties, thereby reducing water absorption. The UV absorber and light stabilizer composite auxiliary agent can simultaneously absorb ultraviolet rays and convert them into harmless heat for release, while preventing or delaying light-induced polymer chain breakage or cross-linking reactions, thereby improving the material's weather resistance, preventing material aging, and extending the material's service life.

[0023] At the same time, the nano effect of nano-silica and some components in the composite additives of ultraviolet absorbers and light stabilizers can destroy the cell walls or cell membranes of bacteria, inhibit bacterial growth and reproduction, and help improve the antibacterial properties of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0025] Figure 1 This is a flow chart of a PEI-modified polymer material and its preparation method of the present invention. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] A PEI-modified polymer material comprises the following components by weight:

[0028] 80-90 parts of PEI resin, 2-5 parts of nano-silicon dioxide, 0.5-2 parts of ultraviolet absorber and light stabilizer composite auxiliary agent, 0.1-1 part of antistatic agent, 0.1-1% of antioxidant, and 0.1-2 parts of lubricant.

[0029] Example 1

[0030] The raw material ratio is as follows: 85 parts of PEI resin, 3 parts of nano-silicon dioxide, 1.5 parts of ultraviolet absorber and light stabilizer composite additive, 0.5 parts of antistatic agent, 0.2 parts of antioxidant, and 0.3 parts of lubricant;

[0031] The PEI resin is dried in a drying oven at 80-100°C for 2-4 hours, and the nano-silica is dried in a vacuum oven at 120°C for 4-6 hours for activation treatment. The ultraviolet absorber and light stabilizer composite auxiliary agent, antistatic agent and antioxidant and lubricant are accurately weighed according to the formula ratio and set aside. The dried PEI resin is added to a high-speed mixer and preheated at a speed of 1000-1500 rpm for 5-10 minutes. Then, the nano-silica, ultraviolet absorber and light stabilizer composite auxiliary agent, antistatic agent and antioxidant and lubricant are added in sequence and the mixing is continued for 15-20 minutes to fully and evenly mix the components. The combined material is added to a twin-screw extruder, and the temperature of each zone of the twin-screw extruder is set to 300° C., 320° C., 340° C., 330° C., and 310° C., so that the material is melted and plasticized in the extruder. After the shearing and mixing action of the screw, the material is further evenly mixed, and then extruded into material through the extruder die head. The extruded strip material is cooled in a cooling water tank with a temperature of 10-20° C. to solidify and shape it, and then cut into particles by a pelletizer to obtain modified PEI polymer material particles with a particle length of 2-5 mm. The obtained material particles are dried in a drying oven at 60-80° C. for 2-3 hours to remove surface moisture.

[0032] Example 2

[0033] The raw material ratio is as follows: 90 parts of PEI resin, 2 parts of nano-silicon dioxide, 1 part of ultraviolet absorber and light stabilizer composite additive, 0.1 part of antistatic agent, 0.3 part of antioxidant, and 0.2 part of lubricant;

[0034] The PEI resin is dried in a drying oven at 80-100°C for 2-4 hours, and the nano-silica is dried in a vacuum oven at 120°C for 4-6 hours for activation treatment. The ultraviolet absorber and light stabilizer composite auxiliary agent, antistatic agent and antioxidant and lubricant are accurately weighed according to the formula ratio and set aside. The dried PEI resin is added to a high-speed mixer and preheated at a speed of 1000-1500 rpm for 5-10 minutes. Then, the nano-silica, ultraviolet absorber and light stabilizer composite auxiliary agent, antistatic agent and antioxidant and lubricant are added in sequence and the mixing is continued for 15-20 minutes to fully and evenly mix the components. The combined material is added to a twin-screw extruder, and the temperature of each zone of the twin-screw extruder is set to 300° C., 320° C., 340° C., 330° C., and 310° C., so that the material is melted and plasticized in the extruder. After the shearing and mixing action of the screw, the material is further evenly mixed, and then extruded into material through the extruder die head. The extruded strip material is cooled in a cooling water tank with a temperature of 10-20° C. to solidify and shape it, and then cut into particles by a pelletizer to obtain modified PEI polymer material particles with a particle length of 2-5 mm. The obtained material particles are dried in a drying oven at 60-80° C. for 2-3 hours to remove surface moisture.

[0035] Example 3

[0036] The raw material ratio is as follows: 80 parts of PEI resin, 5 parts of nano-silicon dioxide, 2 parts of ultraviolet absorber and light stabilizer composite additive, 0.5 parts of antistatic agent, 0.5 parts of antioxidant, and 0.3 parts of lubricant;

[0037] The PEI resin is dried in a drying oven at 80-100°C for 2-4 hours, and the nano-silica is dried in a vacuum oven at 120°C for 4-6 hours for activation treatment. The ultraviolet absorber and light stabilizer composite auxiliary agent, antistatic agent and antioxidant and lubricant are accurately weighed according to the formula ratio and set aside. The dried PEI resin is added to a high-speed mixer and preheated at a speed of 1000-1500 rpm for 5-10 minutes. Then, the nano-silica, ultraviolet absorber and light stabilizer composite auxiliary agent, antistatic agent and antioxidant and lubricant are added in sequence and the mixing is continued for 15-20 minutes to fully and evenly mix the components. The combined material is added to a twin-screw extruder, and the temperature of each zone of the twin-screw extruder is set to 300° C., 320° C., 340° C., 330° C., and 310° C., so that the material is melted and plasticized in the extruder. After the shearing and mixing action of the screw, the material is further evenly mixed, and then extruded into material through the extruder die head. The extruded strip material is cooled in a cooling water tank with a temperature of 10-20° C. to solidify and shape it, and then cut into particles by a pelletizer to obtain modified PEI polymer material particles with a particle length of 2-5 mm. The obtained material particles are dried in a drying oven at 60-80° C. for 2-3 hours to remove surface moisture.

[0038] Comparative Example 1

[0039] The raw material ratio is as follows: 85 parts of PEI resin, 1.5 parts of ultraviolet absorber and light stabilizer composite additive, 0.5 parts of antistatic agent, 0.2 parts of antioxidant, and 0.3 parts of lubricant;

[0040] Dry the PEI resin in a drying oven at 80-100°C for 2-4 hours, accurately weigh the UV absorber and light stabilizer composite additives, antistatic agent, antioxidant and lubricant according to the formula ratio, add the dried PEI resin to a high-speed mixer, preheat it at a speed of 1000-1500 rpm for 5-10 minutes, then add the UV absorber and light stabilizer composite additives, antistatic agent, antioxidant and lubricant in sequence, continue mixing for 15-20 minutes to fully and evenly mix the components, add the mixed materials to the twin-screw extruder, and extruder The temperatures of each zone out of the machine are set to 300°C, 320°C, 340°C, 330°C, and 310°C, so that the material is melted and plasticized in the extruder. After the shearing and mixing action of the screw, the material is further evenly mixed and then extruded into material through the extruder die head. The extruded strip material is cooled in a cooling water tank with a temperature of 10-20°C to solidify and shape it. It is then pelletized by a pelletizer to obtain modified PEI polymer material particles with a length of 2-5 mm. The obtained material particles are dried in a drying oven at 60-80°C for 2-3 hours to remove surface moisture.

[0041] Comparative Example 2

[0042] The raw material ratio is as follows: 85 parts of PEI resin, 3 parts of nano-silicon dioxide, 0.5 parts of antistatic agent, 0.2 parts of antioxidant, and 0.3 parts of lubricant;

[0043] Dry the PEI resin in a drying oven at 80-100°C for 2-4 hours, dry the nano-silica in a vacuum oven at 120°C for 4-6 hours for activation, accurately weigh the antistatic agent, antioxidant and lubricant according to the formula ratio, add the dried PEI resin to a high-speed mixer, preheat it at a speed of 1000-1500 rpm for 5-10 minutes, then add the nano-silica, antistatic agent, antioxidant and lubricant in sequence, continue mixing for 15-20 minutes to fully and evenly mix the components, and add the mixed materials to the twin-screw extruder. The temperature of each zone of the twin-screw extruder is set to 300°C, 320°C, 340°C, 330°C, and 310°C, so that the material is melted and plasticized in the extruder. After the shearing and mixing action of the screw, the material is further evenly mixed and then extruded into material through the extruder die head. The extruded strip material is cooled in a cooling water tank with a temperature of 10-20°C to solidify and shape it, and then cut into particles by a pelletizer to obtain modified PEI polymer material particles with a particle length of 2-5 mm. The obtained material particles are dried in a drying oven at 60-80°C for 2-3 hours to remove surface moisture.

[0044] The materials obtained in the above examples and comparative examples were tested, and the experimental data are as follows:

[0045]

[0046]

[0047] In summary, the combined use of nano-silica and the composite auxiliary agent of ultraviolet absorber and light stabilizer of the present invention allows nano-silica to fill the micropores and defects inside the material, enhance the density and barrier properties of the material, and thus reduce the water absorption. The composite auxiliary agent of ultraviolet absorber and light stabilizer can simultaneously absorb ultraviolet rays and convert them into harmless heat and release it, while preventing or delaying the breakage or cross-linking reaction of polymer chains caused by light, thereby improving the weather resistance of the material, thereby preventing the aging of the material, and thus extending the service life of the material. At the same time, the nano-effect of nano-silica and some components in the composite auxiliary agent of ultraviolet absorber and light stabilizer can destroy the cell wall or cell membrane of bacteria, inhibit bacterial growth and reproduction, and thus improve the antibacterial properties of the material.

[0048] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as illustrative and non-restrictive in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and all changes that come within the meaning and range of equivalents of the claims are intended to be included therein.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A PEI-modified polymer material, characterized in that: It comprises the following components by weight: 80-90 parts of PEI resin, 2-5 parts of nano-silicon dioxide, 0.5-2 parts of ultraviolet absorber and light stabilizer composite auxiliary agent, 0.1-1 part of antistatic agent, 0.1-1% of antioxidant, and 0.1-2 parts of lubricant.

2. A PEI-modified polymer material according to claim 1, characterized in that: The invention comprises the following components by weight: 85 parts of PEI resin, 3 parts of nano silicon dioxide, 1.5 parts of ultraviolet absorber and light stabilizer composite auxiliary agent, 0.5 parts of antistatic agent, 0.2% of antioxidant and 0.3 parts of lubricant.

3. A PEI-modified polymer material according to claim 1, characterized in that: The invention comprises the following components by weight: 90 parts of PEI resin, 2 parts of nano silicon dioxide, 1 part of ultraviolet absorber and light stabilizer composite auxiliary agent, 0.1 part of antistatic agent, 0.3% of antioxidant and 0.2 part of lubricant.

4. A PEI-modified polymer material according to claim 1, characterized in that: The invention comprises the following components by weight: 80 parts of PEI resin, 5 parts of nano silicon dioxide, 2 parts of ultraviolet absorber and light stabilizer composite auxiliary agent, 0.5 parts of antistatic agent, 0.5% of antioxidant and 0.3 parts of lubricant.

5. A method for preparing a PEI-modified polymer material, applicable to the PEI-modified polymer material according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: Step 1: Dry the PEI resin in a drying oven at 80-100°C for 2-4 hours, dry the nano-silica in a vacuum oven at 120°C for 4-6 hours for activation, and accurately weigh the UV absorber and light stabilizer composite additives, antistatic agent, antioxidant, and lubricant according to the formula ratio for later use; Step 2: Add the dried PEI resin to a high-speed mixer and preheat it at a speed of 1000-1500 rpm for 5-10 minutes. Then, add nano-silica, ultraviolet absorber and light stabilizer composite additives, antistatic agent and antioxidant, and lubricant in sequence. Continue mixing for 15-20 minutes to ensure that all components are fully and evenly mixed. Step 3: Add the mixed materials into a twin-screw extruder at a temperature of 280-350°C to melt and plasticize the materials in the extruder. After the shearing and mixing action of the screw, the materials are further evenly mixed and then extruded into materials through the extruder die head. Step 4: The extruded strip material is cooled in a cooling water tank to solidify and then cut into pellets by a pelletizer to obtain modified PEI polymer material particles; Step 5: Dry the material particles obtained in step 4 in a drying oven at 60-80° C. for 2-3 hours to remove surface moisture.

6. The method for preparing a PEI-modified polymer material according to claim 5, wherein: The temperature of the cooling water tank is 10-20°C.

7. The method for preparing a PEI-modified polymer material according to claim 5, wherein: The length of the particles cut out by the pelletizer is 2-5 mm.

8. The method for preparing a PEI-modified polymer material according to claim 5, wherein: The temperature of each zone of the twin-screw extruder was set to 300°C, 320°C, 340°C, 330°C, and 310°C.

Images