CN110760183A - Preparation method of PA66 carbon fiber composite material - Google Patents
Preparation method of PA66 carbon fiber composite material Download PDFInfo
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- CN110760183A CN110760183A CN201910870515.XA CN201910870515A CN110760183A CN 110760183 A CN110760183 A CN 110760183A CN 201910870515 A CN201910870515 A CN 201910870515A CN 110760183 A CN110760183 A CN 110760183A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/042—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with carbon fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/06—Polyamides derived from polyamines and polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention relates to a preparation method of a PA66 carbon fiber composite material, which is characterized by reducing the hygroscopicity and comprising the following steps: (1) taking materials with the weight parts of PA 6650-75, carbon fiber 20-40, antioxidant 1-2, lubricant 1-2, nucleating agent 1-2 and compatilizer 2-4; (2) uniformly mixing PA 6650-75, antioxidant 1-2, lubricant 1-2, nucleating agent 1-2 and compatilizer 2-4 in the step (1), adding the mixture into a double-screw extruder for plasticizing to obtain a high-temperature mixture, connecting a dipping device at a die head of the extruder, and controlling the temperature of the extruder to be 240 ℃; (3) conveying the high-temperature mixture obtained in the step (2) to a die head, wherein the temperature of the die head is 250 ℃, and conveying the carbon fibers to the die head for impregnation to obtain an impregnated matter; (4) drawing out the fully impregnated matter, cooling and shaping to obtain a semi-finished product; (5) and (4) adding the semi-finished product particles obtained in the step (4) into an injection molding machine for injection molding.
Description
Technical Field
The invention relates to the field of composite material preparation, in particular to a preparation method of a PA66 carbon fiber composite material.
Background
Carbon fiber composite materials are an important branch of composite materials, and because of their excellent properties, the use and yield of such materials have been expanding in recent years. Carbon fiber reinforced composite materials have long been regarded as expensive materials, the price of which is about ten times that of glass fiber reinforced composite materials, and the carbon fiber reinforced composite materials are only used in advanced technical industries such as military industry, aerospace and the like. In recent years, carbon fibers are growing at a rate of more than 50% every year, two important factors push the development of carbon fiber composite materials, and firstly, the materials are continuously and deeply recognized, so that the performance of the materials is gradually improved, performances which are difficult to be compared with other materials can be achieved, and the use amount of the materials is promoted to be increased continuously. The second is the continuous reduction in cost to efficiency ratio, which is mainly attributed to the ability of the carbon fiber industry to provide high quality fibers and the continuous advancement of fiber/matrix fusion technology. The mass production of carbon fiber improves the quality and reduces the price, and the improvement of processing technology continuously increases the proportion of the carbon fiber added into the composite material, which can reach more than 60 percent of the volume proportion at present, however, the thermosetting composite material has high cost, long forming period, difficult recycling and serious environmental pollution. After years of research and development on base materials, PC, PEEK, PPS, PI, PA, PET and PP are selected as the base materials in sequence. From the tests it was found that PA is a very important thermoplastic binder. Although PA is engineering plastic with excellent performance, PA has large hygroscopicity, poor dimensional stability of products and far lower strength and hardness than metal, and in order to overcome the defects, carbon fiber or other types of fibers are used for reinforcement to improve the performance of PA. The carbon fiber reinforced PA material has the advantages of high strength and rigidity, small creep, good size precision, obviously improved thermal stability, wear resistance, excellent damping property and better performance compared with glass fiber reinforcement.
However, the PA66 and carbon fiber composite also have the obvious disadvantages that the moisture absorption is still greatly influenced by PA66, the impact strength is reduced in a dry environment, and the forming and processing process is not easy to control.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for preparing PA66 carbon fiber composite material to reduce its moisture absorption, in order to overcome the above-mentioned shortcomings of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: 1. a preparation method of a PA66 carbon fiber composite material is characterized by comprising the following steps:
(1) taking materials with the weight parts of PA 6650-75, carbon fiber 20-40, antioxidant 1-2, lubricant 1-2, nucleating agent 1-2 and compatilizer 2-4;
(2) uniformly mixing PA 6650-75, antioxidant 1-2, lubricant 1-2, nucleating agent 1-2 and compatilizer 2-4 in the step (1), adding the mixture into a double-screw extruder for plasticizing to obtain a high-temperature mixture, connecting a dipping device at a die head of the extruder, and controlling the temperature of the extruder to be 240 ℃;
(3) conveying the high-temperature mixture obtained in the step (2) to a die head, wherein the temperature of the die head is 250 ℃, and conveying the carbon fibers to the die head for impregnation to obtain an impregnated matter;
(4) drawing out the fully impregnated matter, cooling and shaping to obtain a semi-finished product;
(5) and (4) adding the semi-finished product particles obtained in the step (4) into an injection molding machine for injection molding.
The invention further comprises the following steps: the compatilizer is polyolefin with the weight of 1 to 1 and maleic anhydride graft.
The invention further comprises the following steps: the injection pressure is 80-90 MPa.
The present invention having the above features: the polyolefin and maleic anhydride graft are used as compatilizers, so that the impact strength is improved, the water absorption is reduced, the dispersion phase refinement is promoted, the machine viscosity is increased, the processability is increased, and the advantages of the carbon fiber are achieved.
Detailed Description
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
The first embodiment is as follows:
(1) taking materials with the weight parts of PA 6650, carbon fiber 40, antioxidant 2, lubricant 2, nucleating agent 2 and compatilizer 4;
(2) uniformly mixing the PA 6650, the antioxidant 2, the lubricant 2, the nucleating agent 2 and the compatilizer 4 in the step (1), adding the mixture into a double-screw extruder for plasticizing to obtain a high-temperature mixture, connecting a dipping device at a die head of the extruder, and controlling the temperature of the extruder to be 240 ℃;
(3) conveying the high-temperature mixture obtained in the step (2) to a die head, wherein the temperature of the die head is 250 ℃, and conveying 40 parts of carbon fibers to the die head for impregnation to obtain an impregnated matter;
(4) drawing out the fully impregnated matter, cooling and shaping to obtain a semi-finished product;
(5) and (4) adding the semi-finished product obtained in the step (4) into an injection molding machine, and performing injection molding at the pressure of 80 MPa.
Example two:
(1) taking materials with the weight parts of PA 6660, carbon fiber 35, antioxidant 1, lubricant 1, nucleating agent 1 and compatilizer 2;
(2) uniformly mixing the PA 6660, the antioxidant 1, the lubricant 1, the nucleating agent 1 and the compatilizer 2 in the step (1), adding the mixture into a double-screw extruder for plasticizing to obtain a high-temperature mixture, connecting a dipping device at a die head of the extruder, and controlling the temperature of the extruder to be 240 ℃;
(3) conveying the high-temperature mixture obtained in the step (2) to a die head, wherein the temperature of the die head is 250 ℃, and conveying 35 parts of carbon fibers to the die head for impregnation to obtain an impregnated matter;
(4) drawing out the fully impregnated matter, cooling and shaping to obtain a semi-finished product;
(5) and (4) adding the semi-finished product obtained in the step (4) into an injection molding machine, and performing injection molding at the pressure of 80 MPa.
Claims (3)
1. A preparation method of a PA66 carbon fiber composite material is characterized by comprising the following steps:
(1) taking materials with the weight parts of PA 6650-75, carbon fiber 20-40, antioxidant 1-2, lubricant 1-2, nucleating agent 1-2 and compatilizer 2-4;
(2) uniformly mixing PA 6650-75, antioxidant 1-2, lubricant 1-2, nucleating agent 1-2 and compatilizer 2-4 in the step (1), adding the mixture into a double-screw extruder for plasticizing to obtain a high-temperature mixture, connecting a dipping device at a die head of the extruder, and controlling the temperature of the extruder to be 240 ℃;
(3) conveying the high-temperature mixture obtained in the step (2) to a die head, wherein the temperature of the die head is 250 ℃, and conveying the carbon fibers to the die head for impregnation to obtain an impregnated matter;
(4) drawing out the fully impregnated matter, cooling and shaping to obtain a semi-finished product;
(5) and (4) adding the semi-finished product particles obtained in the step (4) into an injection molding machine for injection molding.
2. The method for preparing PA66 carbon fiber composite material as claimed in claim 1, wherein: the compatilizer is polyolefin with the weight of 1 to 1 and maleic anhydride graft.
3. The method for preparing PA66 carbon fiber composite material as claimed in claim 1, wherein: the injection pressure is 80-90 MPa.
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| CN201910870515.XA CN110760183A (en) | 2019-09-16 | 2019-09-16 | Preparation method of PA66 carbon fiber composite material |
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| CN201910870515.XA CN110760183A (en) | 2019-09-16 | 2019-09-16 | Preparation method of PA66 carbon fiber composite material |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942782A (en) * | 2012-10-24 | 2013-02-27 | 常州大学 | Continuous carbon fiber reinforced nylon composite material used under continuous high temperature environment, and preparation method thereof |
| CN103073886A (en) * | 2012-12-25 | 2013-05-01 | 安徽科聚新材料有限公司 | Nylon 66 composite material, preparation method thereof and electronic device |
| CN105199379A (en) * | 2015-10-27 | 2015-12-30 | 北京纳盛通新材料科技有限公司 | Continuous long carbon fiber reinforced thermoplastic nanocomposite and preparation method and application thereof |
| CN106916447A (en) * | 2017-03-02 | 2017-07-04 | 山东道恩高分子材料股份有限公司 | A kind of preparation method of the modified long glass fibres reinforced thermoplastics of aramid fiber |
| CN108690347A (en) * | 2017-04-10 | 2018-10-23 | 广州金发碳纤维新材料发展有限公司 | A kind of carbon fiber reinforced nylon composite material and preparation method |
-
2019
- 2019-09-16 CN CN201910870515.XA patent/CN110760183A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942782A (en) * | 2012-10-24 | 2013-02-27 | 常州大学 | Continuous carbon fiber reinforced nylon composite material used under continuous high temperature environment, and preparation method thereof |
| CN103073886A (en) * | 2012-12-25 | 2013-05-01 | 安徽科聚新材料有限公司 | Nylon 66 composite material, preparation method thereof and electronic device |
| CN105199379A (en) * | 2015-10-27 | 2015-12-30 | 北京纳盛通新材料科技有限公司 | Continuous long carbon fiber reinforced thermoplastic nanocomposite and preparation method and application thereof |
| CN106916447A (en) * | 2017-03-02 | 2017-07-04 | 山东道恩高分子材料股份有限公司 | A kind of preparation method of the modified long glass fibres reinforced thermoplastics of aramid fiber |
| CN108690347A (en) * | 2017-04-10 | 2018-10-23 | 广州金发碳纤维新材料发展有限公司 | A kind of carbon fiber reinforced nylon composite material and preparation method |
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