CN111057369A - Carbon fiber reinforced polyamide composite material pre-soaked basalt fiber cloth and preparation method thereof - Google Patents

Carbon fiber reinforced polyamide composite material pre-soaked basalt fiber cloth and preparation method thereof Download PDF

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CN111057369A
CN111057369A CN201911275824.9A CN201911275824A CN111057369A CN 111057369 A CN111057369 A CN 111057369A CN 201911275824 A CN201911275824 A CN 201911275824A CN 111057369 A CN111057369 A CN 111057369A
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carbon fiber
composite material
reinforced polyamide
fiber reinforced
polyamide composite
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王雷
丁有朝
余莉花
吴摞
任东方
李荣群
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Orinko Advanced Plastics Co Ltd
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    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/0405Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
    • C08J5/042Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with carbon fibres
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    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
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    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/06Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
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    • C08J2377/00Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2377/06Polyamides derived from polyamines and polycarboxylic acids
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    • C08J2423/00Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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    • C08J2477/00Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2477/02Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/34Silicon-containing compounds
    • C08K3/346Clay
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
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    • C08K3/36Silica
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    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/40Glass
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00Use of pretreated ingredients
    • C08K9/04Ingredients treated with organic substances
    • C08K9/06Ingredients treated with organic substances with silicon-containing compounds

Abstract

The invention discloses a carbon fiber reinforced polyamide composite material pre-infiltrated basalt fiber cloth and a preparation method thereof, wherein a basalt fiber cloth base cloth is prepared by pre-infiltrating the carbon fiber reinforced polyamide composite material and then rolling and drawing; the carbon fiber reinforced polyamide composite material is composed of the following raw materials: PA66, PA6, chopped carbon fibers, a toughening agent, a compatilizer, a filling modifier, an antioxidant, a lubricant and a dispersant. The carbon fiber reinforced polyamide composite material is used for replacing the traditional thermosetting resin pre-soaked basalt fiber cloth, so that the production cost and the forming period are reduced, and the carbon fiber reinforced polyamide composite material can be recycled; the chopped carbon fibers have a riveting effect between the fiber cloth and the polyamide resin, so that the interlayer strength is increased. The basalt fiber cloth has higher strength than glass fiber cloth and much lower price than carbon fiber cloth, and is a new inorganic material with high cost performance.

Description

Carbon fiber reinforced polyamide composite material pre-soaked basalt fiber cloth and preparation method thereof
Technical Field
The invention belongs to the field of carbon fiber reinforced thermoplastic composite materials, and particularly relates to carbon fiber reinforced polyamide composite material pre-infiltrated basalt fiber cloth and a preparation method thereof.
Background
With the development of light weight of automobile products and light weight, portability and high strength of electronic products, thermosetting polymer pre-impregnated carbon fiber composite materials and part of thermoplastic polymer pre-impregnated carbon fiber composite materials develop faster. The light weight technology becomes an important way for realizing energy conservation and emission reduction and improving the endurance capacity of new energy automobiles, and the carbon fiber composite material is an important basic material for light weight of automobiles. The carbon fiber composite materials used in the automobile industry at present are mainly carbon fiber reinforced thermosetting resin composite materials and a small amount of carbon fiber reinforced thermoplastic composite materials, and spray forming, sheet pressing forming, resin transfer compression molding (RTM), winding forming, injection molding and the like are adopted according to different forming modes. Electronic products such as high-end notebooks and mobile phones have the use of thermosetting resin pre-impregnated carbon fiber sheets, which can greatly reduce the thickness of the products and improve the strength of the materials, so that the electronic products are increasingly lighter, thinner and more portable. The thermosetting carbon fiber composite material has high strength, but the development of the thermosetting carbon fiber composite material in the future is limited due to the defects of complex forming, long period, environmental pollution, incapability of recycling and the like, and the thermoplastic carbon fiber reinforced composite material is an important direction for the development of lightweight automobiles and steel replacement by plastics in the future.
Although the thermoplastic carbon fiber reinforced composite material has great advantages in the molding process and the production process compared with the traditional thermosetting resin pre-impregnated carbon fiber composite material, the price of the carbon fiber cloth is high, so that the composite material has no great competitive advantage. The basalt fiber cloth is woven by basalt fibers, the basalt fibers not only have the advantages of excellent strength, high temperature resistance, acid and alkali resistance, easy infiltration and the like, but also have lower price, and the development of a thermoplastic polymer pre-infiltrated basalt fiber cloth composite material with high strength and low cost is a new development direction. At present, two main defects of thermoplastic pre-impregnated carbon fiber cloth need to be improved: (1) the thermoplastic pre-infiltrated carbon fiber cloth is not fully infiltrated, the surface of the fiber cloth is easy to damage, and an infiltrated layer is easy to fall off; (2) the thermoplastic pre-infiltrated carbon fiber cloth has no lower cost advantage in application because the market price of the carbon fiber is higher.
Disclosure of Invention
The invention aims to provide carbon fiber reinforced polyamide composite material pre-impregnated basalt fiber cloth and a preparation method thereof, so as to overcome the defect of thermoplastic resin pre-impregnated carbon fiber cloth, reduce the cost of a composite material and improve the strength of the pre-impregnated carbon fiber cloth.
The purpose of the invention is realized by the following technical scheme:
a carbon fiber reinforced polyamide composite material pre-infiltrated basalt fiber cloth is prepared by pre-infiltrating a basalt fiber cloth base cloth with a carbon fiber reinforced polyamide composite material and then rolling and drawing; the carbon fiber reinforced polyamide composite material is prepared from the following raw materials in parts by weight:
Figure BDA0002315530490000021
in a further scheme, the basalt fiber cloth base cloth is twistless coarse sand checkered cloth.
Further, the relative viscosity of the PA66 is 2.4-2.7, and the relative viscosity of the PA6 is 2.7-3.4.
Further, the carbon fiber is chopped carbon fiber with the length of 1mm-20 mm.
In a further scheme, the toughening agent is a mixture of POE and nano montmorillonite in a mass ratio of 4: 1; the compatilizer is maleic anhydride grafted POE.
In a further scheme, the filling modifier is a mixture of modified glass powder and silicon dioxide according to the weight ratio of 1:1-2: 1. The modified glass powder is glass powder modified by a coupling agent; the processing method comprises the following steps: adding the glass powder and the coupling agent into a high-speed mixer at 100 ℃, and uniformly mixing and stirring, wherein the mass of the coupling agent is 0.5-1% of that of the glass powder, and specifically can be 0.5%, 0.8%, 1% and the like.
In a further scheme, the antioxidant is a mixture composed of hindered phenols and phosphites; the lubricant is at least 2 of stearate, modified bisstearamide or polyethylene wax
In a further scheme, the dispersing agent is one of a polar copolymer product and silicone master batch.
The invention also aims to provide a preparation method of the carbon fiber reinforced polyamide composite material pre-infiltrated basalt fiber cloth, which comprises the following steps:
(1) adding PA66, PA6, a toughening agent, a compatilizer, a filling modifier, a lubricant, a dispersant and an antioxidant into a high-speed mixer according to a proportion, mixing, and cooling to room temperature to obtain a mixture;
(2) putting the mixture into a double-screw extruder from a main feeding port, adding the short carbon fibers into the double-screw extruder from a side feeding port, preparing the carbon fiber reinforced polypropylene composite material through melting and blending, and conveying the carbon fiber reinforced polyamide composite material into a melt pool; wherein the extrusion temperature of the double-screw extruder is 230-280 ℃, the screw rotating speed is 350-420r/min, and the vacuum degree is less than-0.06 MPa;
(3) after strong acid oxidation treatment, washing and drying the basalt fiber cloth base cloth, and treating the surface of the basalt fiber cloth base cloth by using a coupling agent to obtain pretreated basalt fiber cloth; and (3) infiltrating the pretreated basalt fiber cloth in a melt pool containing the carbon fiber reinforced polyamide composite material in the step (2), and rolling and drawing to prepare the carbon fiber reinforced polyamide composite material preimpregnated basalt fiber cloth.
In the step (3), the acid used in the strong acid oxidation treatment is 20-40% by mass of sulfuric acid, and the mass fraction of the sulfuric acid may be 20%, 30% or 40%.
Compared with the prior art, the invention has the beneficial effects that:
(1) the carbon fiber reinforced polyamide composite material is used for replacing the traditional thermosetting resin impregnated fiber cloth, so that the forming period is shortened, the pollution is reduced, and the carbon fiber reinforced polyamide composite material can be recycled, the short carbon fibers in the composite material have a riveting effect between the basalt fiber cloth and the polyamide resin, the interlayer strength is increased, and the surface defects of the fiber cloth are repaired. And the preparation process is simple and the production cost is low.
(2) The basalt fiber cloth is used as the base cloth, so that the basalt fiber cloth has the advantages of high strength, good heat resistance, acid and alkali resistance and lower price, and can greatly improve the product performance and reduce the production cost. Before the basalt fiber cloth base cloth is soaked with the carbon fiber reinforced polyamide composite material, the surface of the basalt fiber cloth base cloth is treated by a coupling agent to obtain the pretreated basalt fiber cloth, so that the surface polarity of the base cloth is increased, and the bonding strength of the basalt fiber cloth base cloth with polyamide and a filling modifier in the composite material is enhanced.
(3) According to the invention, the mixture of glass powder and silicon dioxide is used as a filling modifier, and the structure of the hard ultrafine particles of the Ammi micro-nano cube has super-strong dispersing ability and anti-settling property in a polymer melt, so that the hard ultrafine particles are very high in hardness and are easily dispersed in the chopped carbon fibers, the aggregation of the chopped carbon fibers is reduced, the carbon fibers are arranged in an anisotropic manner, and the dispersing ability of the carbon fibers in polyamide resin is improved. Meanwhile, the higher polarity plays a role in improving the bonding strength of the carbon fiber reinforced polyamide composite material and the basalt fiber cloth in the infiltration process.
Detailed Description
The present invention will be further described with reference to the following examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The types and suppliers of reagents used in the following examples were as follows: the polar copolymer is KF-027 produced by Jiangzhou Jiahua refined company Limited), the silane coupling agent is KH550 produced by Nanjing eosin fine chemical industry Limited), and the glass powder is FR-01 produced by Guangzhou Songliner; the modified glass powder is glass powder modified by a silane coupling agent KH550, and the mass of the KH550 is 1% of that of the glass powder.
The reagents are provided only for illustrating the sources and components of the reagents used in the experiments of the present invention, so as to be fully disclosed, and do not indicate that the present invention cannot be realized by using other reagents of the same type or other reagents supplied by other suppliers.
Example 1:
the carbon fiber reinforced polyamide composite material is prepared from the following raw materials in parts by weight:
Figure BDA0002315530490000041
the basalt fiber cloth base cloth is selected from 600g/m2And large-tow checkered cloth.
Example 2:
the carbon fiber reinforced polyamide composite material is prepared from the following raw materials in parts by weight:
Figure BDA0002315530490000042
Figure BDA0002315530490000051
the basalt fiber cloth base cloth is selected from 600g/m2And large-tow checkered cloth.
Example 3:
the carbon fiber reinforced polyamide composite material is prepared from the following raw materials in parts by weight:
Figure BDA0002315530490000052
the basalt fiber cloth base cloth is selected from 600g/m2And large-tow checkered cloth.
Example 4:
the carbon fiber reinforced polyamide composite material is prepared from the following raw materials in parts by weight:
Figure BDA0002315530490000053
Figure BDA0002315530490000061
the basalt fiber cloth base cloth is selected from 600g/m2And large-tow checkered cloth.
The preparation method of the carbon fiber reinforced polyamide composite material pre-infiltrated basalt fiber cloth in the above embodiment comprises the following steps:
(1) adding the components into a high-speed mixer according to a ratio, mixing at a high speed of 80 ℃ for 5 minutes to form a uniformly dispersed mixture, opening the high-speed mixer, discharging air, and cooling to room temperature to obtain the mixture;
(2) putting the mixture into a double-screw extruder from a main feeding port, adding the chopped carbon fibers into the double-screw extruder from a side feeding port, preparing the carbon fiber reinforced polyamide composite material through melting and blending, and conveying the carbon fiber reinforced polyamide composite material into a melt pool; wherein, the extrusion temperature of the double-screw extruder is 230 ℃ in a first zone, 270 ℃ in a second zone, 280 ℃ in a third zone, 280 ℃ in a fourth zone, 270 ℃ in a fifth zone, 260 ℃ in a sixth zone, 250 ℃ in a seventh zone, 240 ℃ in an eighth zone, 230 ℃ in a ninth zone, 270 ℃ in a machine head, the rotating speed of the screw is 400RPM, and the vacuum degree is less than-0.06 MPa;
(3) acidifying the basalt fiber cloth base cloth by using 30% concentrated sulfuric acid aqueous solution for 15 minutes, then washing the basalt fiber cloth base cloth by using deionized water, drying the basalt fiber cloth base cloth, spraying 1kg of silane coupling agent to each square meter of basalt fiber cloth base; and (3) infiltrating the pretreated basalt fiber cloth in a melt pool containing the carbon fiber reinforced polyamide composite material in the step (2), and rolling and drawing to prepare the carbon fiber reinforced polyamide composite material preimpregnated basalt fiber cloth.
Comparative example 1
Figure BDA0002315530490000071
Comparative example 2
Figure BDA0002315530490000072
Except for the above-described composition differences, the preparation methods of comparative examples 1 and 2 were the same as those in the examples.
Table 1: EXAMPLES comparison of prepreg Wet cloth Strength
Figure BDA0002315530490000073
Figure BDA0002315530490000081
Remarking: the instrument used for detection is a microcomputer-controlled universal testing machine, and the size of the test sample strip is as follows: the length is 170mm, the end width is 20mm, the narrow width is 10mm, and the thickness is 4 mm; the tensile strength and tensile modulus were measured at a tensile rate of 50 mm/min.
As can be seen from table 1, the carbon fiber reinforced polyamide composite material pre-impregnated basalt fiber cloth prepared in the examples has very high strength, because the carbon fiber reinforced polyamide composite material of the present invention contains chopped carbon fibers, a compatibilizer, and a filling modifier, the acting force between the composite material and the basalt fiber cloth base cloth is greatly improved, and meanwhile, the thermoplastic resin selected from polyamide engineering plastics has very high strength compared with common thermoplastic resins such as polypropylene, polycarbonate, and the like. In comparison with example 4, the tensile strength of the material is reduced by 30MPa and the modulus is reduced by 9GPa after the filling modifier is removed, so that the filling modifier has great effect. Compared with the embodiment 3, the short carbon fiber is removed in the comparative example 2, the material reduction is large, and the scientific short carbon fiber has good riveting and reinforcing effects.
The carbon fiber reinforced polyamide pre-infiltrated basalt fiber cloth prepared by the invention has higher strength, and the basalt fiber cloth with high strength and low cost is selected when a workpiece is molded by hot pressing, so that the cost of the composite material is greatly reduced.
It should be noted that, on the basis of the above embodiments, those skilled in the art add other functional additives such as fillers, color masterbatches, functional masterbatches, antistatic agents, scratch resistance agents, etc. to the preparation components, so that the composite material has corresponding characteristics, which also belongs to the protection scope of the present invention.

Claims (10)

1. A carbon fiber reinforced polyamide composite material pre-infiltrated basalt fiber cloth is characterized in that: pre-infiltrating basalt fiber cloth base cloth with a carbon fiber reinforced polyamide composite material, and then rolling and drawing to prepare the basalt fiber cloth base cloth; the carbon fiber reinforced polyamide composite material is prepared from the following raw materials in parts by weight:
PA 6640-60 parts by weight,
the weight ratio of the PA to the total weight of the rubber is 610-20 parts,
3-5 parts of a compatilizer,
3-5 parts of toughening agent
5-10 parts of a filling modifier,
0.2 to 0.5 portion of antioxidant,
10-30 parts of carbon fiber
0.5 to 1 portion of lubricant,
0.5-1 part of dispersant.
2. The carbon fiber reinforced polyamide composite material pre-impregnated basalt fiber cloth of claim 1, wherein: the basalt fiber cloth base cloth is twistless coarse sand check cloth.
3. The carbon fiber reinforced polyamide composite material pre-impregnated basalt fiber cloth of claim 1, wherein: the relative viscosity of the PA66 is 2.4-2.7, and the relative viscosity of the PA6 is 2.7-3.4.
4. The carbon fiber reinforced polyamide composite material pre-impregnated basalt fiber cloth of claim 1, wherein: the carbon fiber is chopped carbon fiber with the length of 1mm-20 mm.
5. The carbon fiber reinforced polyamide composite material pre-impregnated basalt fiber cloth of claim 1, wherein: the toughening agent is a mixture of POE and nano montmorillonite in a mass ratio of 4: 1; the compatilizer is maleic anhydride grafted POE.
6. The carbon fiber reinforced polyamide composite material pre-impregnated basalt fiber cloth of claim 1, wherein: the filling modifier is a mixture of modified glass powder and silicon dioxide according to the weight ratio of 1:1-2: 1; the modified glass powder is glass powder modified by a coupling agent.
7. The carbon fiber reinforced polyamide composite material pre-impregnated basalt fiber cloth of claim 1, wherein: the antioxidant is a mixture of hindered phenols and phosphites; the lubricant is at least 2 of stearate, modified bisstearamide or polyethylene wax.
8. The carbon fiber reinforced polyamide composite material pre-impregnated basalt fiber cloth of claim 1, wherein: the dispersing agent is one of a polar copolymer product and silicone master batch.
9. The method for preparing the carbon fiber reinforced polyamide composite material pre-impregnated basalt fiber cloth according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
(1) adding PA66, PA6, a toughening agent, a compatilizer, a filling modifier, a lubricant, a dispersant and an antioxidant into a high-speed mixer according to a proportion, mixing, and cooling to room temperature to obtain a mixture;
(2) putting the mixture into a double-screw extruder from a main feeding port, adding carbon fibers into the double-screw extruder from a side feeding port, preparing a carbon fiber reinforced polypropylene composite material through melting and blending, and conveying the carbon fiber reinforced polyamide composite material into a melt pool; wherein the extrusion temperature of the double-screw extruder is 230-280 ℃, the screw rotating speed is 350-420r/min, and the vacuum degree is less than-0.06 MPa;
(3) after strong acid oxidation treatment, washing and drying the basalt fiber cloth base cloth, and treating the surface of the basalt fiber cloth base cloth by using a coupling agent to obtain pretreated basalt fiber cloth; and (3) infiltrating the pretreated basalt fiber cloth in a melt pool containing the carbon fiber reinforced polyamide composite material in the step (2), and rolling and drawing to prepare the carbon fiber reinforced polyamide composite material preimpregnated basalt fiber cloth.
10. The method of claim 9, wherein: in the step (3), the acid used for the strong acid oxidation treatment is sulfuric acid with the mass fraction of 20-40%.
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CN114957975A (en) * 2022-07-06 2022-08-30 连云港爱仕沃玛技术纺织有限公司 Environment-friendly waterproof outdoor cloth and preparation method thereof
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