Phenolphthalein polyaryletherketone nanocomposite and preparation method thereof

Abstract

The invention discloses a phenolphthalein polyaryletherketone nano composite material and a preparation method thereof, the composite material comprises the following components by mass: 50-70 wt% of a phenolphthalein polyaryletherketone (PEK-C) matrix, 10-30 wt% of a nano filler, 5-15 wt% of a flexibilizer, 1-5 wt% of an antioxidant, and 1-3 wt% of a processing aid, wherein all the components are physically mixed to form a uniformly dispersed integral structure, and the preparation method comprises the following steps: S1, pre-mixing the phenolphthalein polyaryletherketone matrix and the nano filler in a high-speed mixer; s2, adding the premixed materials into a double-screw extruder, and carrying out melt blending; s3, adding a toughening agent, an antioxidant and a processing aid in the extrusion process, and continuously mixing; and S4, cooling and pelletizing the extruded material to obtain the nano composite material particles. The invention belongs to the field of high polymer materials, and particularly relates to a phenolphthalein polyaryletherketone nanocomposite and a preparation method thereof.

Description

Technical Field

[0001] This invention belongs to the field of polymer materials, specifically referring to a phenolphthalein polyaryletherketone nanocomposite material and its preparation method. Background Technology

[0002] Phenolic phthalate polyaryletherketone (PEK-C) is a high-performance engineering plastic with excellent heat resistance, chemical resistance, and mechanical properties, and is widely used in the automotive, electronics, and aerospace industries. However, pure PEK-C has poor toughness, limiting its application in certain high-stress environments. To improve the toughness of PEK-C, toughening agents and nanofillers are usually added to enhance its overall performance.

[0003] Currently, the main methods used to improve the performance of engineering plastics include adding common inorganic fillers or single toughening agents to enhance certain specific properties. For example, using glass fiber can significantly improve tensile modulus but reduces impact strength; while rubber-like substances can effectively improve toughness but easily lead to a decrease in rigidity and are difficult to balance with other multiple properties. Other common treatment methods, such as copolymerization doping and surface grafting modification, have also been widely explored and practiced. Each has its unique advantages but also significant drawbacks. The former is costly and has a high process complexity, which is not conducive to large-scale industrial production; the latter, due to weak interfacial bonding, often fails to achieve long-term stability. Overall, these traditional improvement measures generally suffer from low efficiency or poor compatibility, and these problems urgently need to be addressed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is the low efficiency or poor compatibility of nanofillers in the prior art.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows: The phenolphthalein polyaryletherketone nanocomposite material and its preparation method proposed in the present invention, wherein the composite material comprises the following components in weight percentage: phenolphthalein polyaryletherketone (PEK-C) matrix: 50-70 wt%, nanofiller: 10-30 wt%, toughening agent: 5-15 wt%, antioxidant: 1-5 wt%, processing aid: 1-3 wt%, wherein the components are physically mixed to form a uniformly dispersed overall structure.

[0006] Furthermore, the types of nanofillers include, but are not limited to, one or more of nano-silica, nano-alumina, carbon nanotubes, and graphene, and the size range is recommended to be controlled between 1 nm and 100 nm.

[0007] Furthermore, the toughening agent includes, but is not limited to, one or more of polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), or polyphenylene sulfide (PPS).

[0008] Furthermore, the antioxidants include, but are not limited to, one or more of triphenyl phosphite and pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate].

[0009] Furthermore, the processing aids include, but are not limited to, one or more of calcium stearate, zinc stearate, or silicone oil.

[0010] Furthermore, the preparation method includes the following steps: S1. Premix the phenolphthalein polyaryletherketone matrix with the nanofiller in a high-speed mixer; S2. Add the premixed material to a twin-screw extruder for melt blending; S3. Add toughening agents, antioxidants, and processing aids during the extrusion process and continue mixing; S4. Cool and pelletize the extruded material to obtain nanocomposite particles.

[0011] The beneficial effects achieved by the present invention using the above structure are as follows: The phenolphthalein polyaryletherketone nanocomposite material and its preparation method proposed in this solution solve the problems of uneven dispersion of nanofillers and poor interfacial compatibility in the prior art by optimizing the material ratio and preparation process. The result is a nanocomposite material with excellent mechanical properties, thermal stability and processing performance. The precise control of the ratio of each component makes the generated product exhibit extremely good mechanical strength, especially the bending fracture load value, which is far superior to the average level of similar competing products, with an increase of nearly double. Attached Figure Description

[0012] Figure 1 This is a flowchart of the preparation process of the present invention.

[0013] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0015] like Figure 1 As shown, the phenolphthalein polyaryletherketone nanocomposite material of the present invention comprises the following components: phenolphthalein polyaryletherketone (PEK-C) matrix: 50-70 wt%, nanofiller: 10-30 wt%, toughening agent: 5-15 wt%, antioxidant: 1-5 wt%, and processing aid: 1-3 wt%.

[0016] The nanofiller is selected from one or more of nano-silica, nano-alumina, nano-carbon nanotubes, and nano-graphene; the toughening agent is one or more of polytetrafluoroethylene (PTFE), polyether ether ketone (PEEK), or polyphenylene sulfide (PPS); the antioxidant is one or more of triphenyl phosphite and pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]; and the processing aid is one or more of calcium stearate, zinc stearate, or silicone oil.

[0017] The preparation method of the phenolphthalein polyarylether ketone nanocomposite material of the present invention includes the following steps: S1. Premixing: The phenolphthalein polyaryletherketone matrix and the nanofiller are premixed in a high-speed mixer for 5-10 minutes at a speed of 1000-1500 rpm.

[0018] S2. Melt Blending: The premixed material is added to a twin-screw extruder for melt blending. The extrusion temperature is 280-320℃, and the screw speed is 200-400 rpm.

[0019] S3. Adding additives: Toughening agents, antioxidants and processing aids are added during the extrusion process, and mixing is continued to ensure that the components are evenly dispersed.

[0020] S4. Cooling and Pelletizing: The extruded material is cooled by water or air cooling at a temperature of 20-40℃. The cooled material is then pelletized by a pelletizer to obtain nanocomposite particles with a particle size of 1-5 mm.

[0021] The technical solution of the present invention will be further illustrated below through specific embodiments.

[0022] Example 1, Material Proportioning: PEK-C matrix: 60 wt% Nano silica: 20 wt% PTFE toughening agent: 10 wt% Triphenyl phosphite: 3 wt% Calcium stearate: 2 wt%.

[0023] Preparation method: S1. Premix the PEK-C matrix with nano-silica in a high-speed mixer for 8 minutes at a speed of 1200 rpm.

[0024] S2. Add the premixed material to a twin-screw extruder for melt blending. The extrusion temperature is 300℃ and the screw speed is 300 rpm.

[0025] S3. Add PTFE toughening agent, triphenyl phosphite and calcium stearate during the extrusion process, and continue mixing.

[0026] S4. The extruded material is water-cooled to a temperature of 25°C. The cooled material is then pelletized by a pelletizer to obtain nanocomposite particles with a particle size of 2 mm.

[0027] Example 2, Material Proportioning: PEK-C matrix: 65 wt% Nano-alumina: 15 wt% PEEK toughening agent: 12 wt% Pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]: 2 wt% Zinc stearate: 1 wt%.

[0028] Preparation method: S1. Premix the PEK-C matrix with nano-alumina in a high-speed mixer for 10 minutes at a speed of 1500 rpm.

[0029] S2. Add the premixed material to a twin-screw extruder for melt blending. The extrusion temperature is 320℃ and the screw speed is 400 rpm.

[0030] S3. During the extrusion process, add PEEK toughening agent, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and zinc stearate, and continue mixing.

[0031] S4. The extruded material is air-cooled to a temperature of 30°C. The cooled material is then pelletized by a pelletizer to obtain nanocomposite particles with a particle size of 3 mm.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A phenolphthalein polyaryletherketone nanocomposite material, characterized in that, The composite material comprises the following components by weight percentage: phenolphthalein polyaryletherketone (PEK) matrix: 50-70 wt%, nanofiller: 10-30 wt%, toughening agent: 5-15 wt%, antioxidant: 1-5 wt%, and processing aid: 1-3 wt%, wherein the components are physically mixed to form a uniformly dispersed overall structure.

2. The phenolphthalein polyaryletherketone nanocomposite material according to claim 1, characterized in that: The types of nanofillers include, but are not limited to, one or more of nano-silica, nano-alumina, carbon nanotubes, and graphene, and the size range is recommended to be controlled between 1 nm and 100 nm.

3. The phenolphthalein polyaryletherketone nanocomposite material according to claim 2, characterized in that: The toughening agents include, but are not limited to, one or more of polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), or polyphenylene sulfide (PPS).

4. The phenolphthalein polyaryletherketone nanocomposite material according to claim 3, characterized in that: The antioxidants include, but are not limited to, one or more of triphenyl phosphite and pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate].

5. The phenolphthalein polyaryletherketone nanocomposite material according to claim 4, characterized in that: The processing aids include, but are not limited to, one or more of calcium stearate, zinc stearate, or silicone oil.

6. The method for preparing a phenolphthalein polyaryletherketone nanocomposite material according to claims 1-5, characterized in that, Includes the following steps: S1. Premix the phenolphthalein polyaryletherketone matrix with the nanofiller in a high-speed mixer; S2. Add the premixed material to a twin-screw extruder for melt blending; S3. Add toughening agents, antioxidants, and processing aids during the extrusion process and continue mixing; S4. Cool and pelletize the extruded material to obtain nanocomposite particles.

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