CN114292490B - Continuous fiber reinforced thermoplastic composite material and preparation method and application thereof - Google Patents
Continuous fiber reinforced thermoplastic composite material and preparation method and application thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 63
- 239000011199 continuous fiber reinforced thermoplastic Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 46
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 80
- 239000004917 carbon fiber Substances 0.000 claims abstract description 80
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000004696 Poly ether ether ketone Substances 0.000 claims abstract description 26
- 229920002530 polyetherether ketone Polymers 0.000 claims abstract description 26
- 229920002492 poly(sulfone) Polymers 0.000 claims abstract description 19
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 11
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 10
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 10
- 238000000465 moulding Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 77
- 235000012239 silicon dioxide Nutrition 0.000 claims description 36
- 239000005543 nano-size silicon particle Substances 0.000 claims description 31
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 20
- 239000000835 fiber Substances 0.000 claims description 12
- 229910001961 silver nitrate Inorganic materials 0.000 claims description 10
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 9
- 238000007731 hot pressing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 238000002715 modification method Methods 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000004513 sizing Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- 239000000805 composite resin Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 19
- 239000000377 silicon dioxide Substances 0.000 description 9
- 239000006185 dispersion Substances 0.000 description 5
- 229920001169 thermoplastic Polymers 0.000 description 5
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000004416 thermosoftening plastic Substances 0.000 description 4
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- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910021392 nanocarbon Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
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- 229920000642 polymer Polymers 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical group CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
- 239000004697 Polyetherimide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
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- 125000000524 functional group Chemical group 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
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- 239000000543 intermediate Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
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- 238000002844 melting Methods 0.000 description 1
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- 239000007800 oxidant agent Substances 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
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- Reinforced Plastic Materials (AREA)
Abstract
The application relates to the field of thermoplastic resin composite materials, and particularly discloses a continuous fiber reinforced thermoplastic composite material, and a preparation method and application thereof. The continuous fiber reinforced thermoplastic composite material comprises the following raw materials in parts by weight: 100-180 parts of polyether-ether-ketone, 150-250 parts of continuous carbon fiber, 15-30 parts of polysulfone, 0.5-1.5 parts of antioxidant and 1.5-3 parts of processing aid; the preparation method comprises the following steps: s1, preparing a unidirectional prepreg tape; s2, placing a master slice; s3, hot press molding. The continuous fiber reinforced thermoplastic composite material can be used for propeller blades, and has excellent impact performance and tensile performance.
Description
Technical Field
The application relates to the field of thermoplastic resin composite materials, in particular to a continuous fiber reinforced thermoplastic composite material and a preparation method thereof.
Background
Along with the improvement of living standard, more and more sports move into the life of people, and rowing exercise belongs to water sports projects, and is an exercise of making a boat advance on the water surface by manpower rowing, and the paddle is an indispensable tool in rowing exercise, and the paddle is a key component of the paddle.
At present, common paddle materials in the market comprise aluminum alloy materials, plastic materials, thermosetting composite materials, thermoplastic composite materials and the like. The fatigue resistance of the aluminum alloy blade is poor, and the thermal deformation is large; the mechanical property of the plastic blade is poor; the thermosetting composite material is brittle, low in impact strength and difficult to recycle; thermoplastic composites are relatively excellent in overall properties.
The continuous fiber reinforced thermoplastic composite material is a novel thermoplastic composite material which is formed by taking thermoplastic resin as a matrix, taking continuous fibers and fabrics thereof as reinforcing materials and performing procedures such as resin melting, dipping, extrusion and the like.
In view of the above-mentioned related art, the applicant has found that the impact resistance of a paddle blade made of a continuous fiber reinforced thermoplastic composite material can be further improved to extend the service life of the blade.
Disclosure of Invention
In order to improve the impact performance of the continuous fiber reinforced thermoplastic composite material and prolong the service life of the paddle blade, the application provides the continuous fiber reinforced thermoplastic composite material and a preparation method thereof.
In a first aspect, the present application provides a continuous fiber reinforced thermoplastic composite material, which adopts the following technical scheme: the continuous fiber reinforced thermoplastic composite material comprises the following raw materials in parts by weight: 100-180 parts of polyether-ether-ketone, 150-250 parts of continuous carbon fiber, 5-15 parts of polysulfone, 0.5-1.5 parts of antioxidant and 1.5-3 parts of processing aid.
By adopting the technical scheme, the polyether-ether-ketone is a crystalline polymer and has excellent impact resistance and damage resistance; the continuous fiber reinforced thermoplastic composite material prepared by using the polyether-ether-ketone as a matrix and the continuous carbon fiber as a reinforcing material has high strength, high rigidity and good dimensional stability. However, the continuous carbon fiber can generate uneven dispersion phenomenon in the polyether-ether-ketone, so that the performance of the composite material is affected, polysulfone is also a thermoplastic polymer, and a certain amount of polysulfone is added into the polyether-ether-ketone, so that on one hand, the polysulfone can be used as a base material, on the other hand, the polysulfone can improve the dispersion uniformity of the continuous carbon fiber in the polyether-ether-ketone, the impact performance and the tensile performance of the composite material are further improved, and the maximum impact force can reach 2789-3684N.
Preferably, the material comprises the following raw materials in parts by weight: 120-150 parts of polyether-ether-ketone, 180-220 parts of continuous carbon fiber, 8-12 parts of polysulfone, 0.8-1.2 parts of antioxidant and 2-2.8 parts of processing aid.
By adopting the technical scheme, the proportion of raw materials in the composite material is further optimized, and the comprehensive performance of the composite material is improved.
Preferably, the continuous carbon fiber is a continuous carbon fiber modified by nano silicon dioxide, and the modification method comprises the following steps: soaking continuous carbon fiber in acetone suspension of nano silicon dioxide, performing sizing treatment at 80-85 ℃, and then drying at 95-100 ℃ to obtain nano silicon dioxide modified continuous carbon fiber; the weight ratio of the nano silicon dioxide to the continuous carbon fiber is 1: (1.5-2.5).
By adopting the technical scheme, the continuous carbon fiber is modified by the nano silicon dioxide, the nano silicon dioxide is wrapped on the surface of the continuous carbon fiber, so that on one hand, the roughness of the surface of the continuous carbon fiber is improved, the contact area between the nano carbon fiber and the polyether-ether-ketone is improved, and on the other hand, the active group is introduced on the surface of the inert continuous carbon fiber, the active group is connected with the polyether-ether-ketone through a chemical bond, the connectivity between the continuous carbon fiber and the polyether-ether-ketone is enhanced, and the interface effect between the continuous carbon fiber and the polyether-ether-ketone is improved, so that the impact performance and the tensile performance of the composite material are improved.
Preferably, the continuous carbon fiber is subjected to an oxidation treatment.
By adopting the technical scheme, before the modification of the nano silicon dioxide on the continuous carbon fiber, the continuous carbon fiber is subjected to oxidation treatment, the surface active groups of the continuous carbon fiber are increased, the reactive functional groups are formed on the surface of the continuous carbon fiber, then the nano silicon dioxide is used for treatment, and the connectivity between the nano silicon dioxide and the continuous carbon fiber is improved.
Preferably, the oxidation treatment method of the continuous carbon fiber comprises the following steps:
1) Ultrasonically dissolving silver nitrate in water to obtain a silver nitrate solution;
2) Adding potassium persulfate into a silver nitrate solution, and stirring until the solution is black to obtain an oxidation solution;
3) Soaking continuous carbon fiber in oxidizing solution, and heating at 65-75deg.C until the solution is transparent;
4) The continuous carbon fiber is taken out and washed, and then dried.
By adopting the technical scheme, the continuous carbon fiber is oxidized by taking potassium persulfate as an oxidant and silver nitrate as a catalyst, so that the surface active groups of the continuous carbon fiber are added without any effect; the body strength of the continuous carbon fiber is damaged, so that the strength of the continuous carbon fiber is ensured, and the impact performance of the composite material is ensured.
The reaction temperature in step 3) may be any temperature between 65 and 75℃such as 65℃and 70℃and 75℃and the like.
Preferably, the nano silicon dioxide is modified by a silane coupling agent.
By adopting the technical scheme, the nano-grade silicon dioxide has large specific surface area and is easy to agglomerate, the silane coupling agent is used for treating the nano-grade silicon dioxide, a lubricating film is formed on the surface of the nano-grade silicon dioxide, the probability of agglomeration of the nano-grade silicon dioxide is reduced, the uniformity of dispersion of the nano-grade silicon dioxide on the continuous carbon fiber is improved, the interface performance between the continuous carbon fiber and the polyether-ether-ketone is further enhanced, and the impact performance and the tensile performance of the composite material are improved.
Preferably, the particle size of the nano silicon dioxide is 40-60nm.
By adopting the technical scheme, the nano silicon dioxide in the secondary particle size range can wrap the continuous carbon fiber well, the interface performance of the continuous carbon fiber and the polyether-ether-ketone is improved, the effect of improving the interface performance can not be reduced due to overlarge size of the silicon dioxide, and the waste and aggregation of the nano silicon dioxide can not be caused due to overlarge particle size.
In a second aspect, the application provides a method for preparing a continuous fiber reinforced thermoplastic composite material, which adopts the following technical scheme:
a method for preparing a continuous fiber reinforced thermoplastic composite material, comprising the steps of:
s1, preparing a unidirectional prepreg tape: melt blending polyether-ether-ketone, polysulfone, an antioxidant and a processing aid to obtain a thermoplastic resin film; impregnating, cooling and rolling the continuous carbon fiber and the thermoplastic resin film to obtain a unidirectional prepreg tape;
s2, placing a master slice: cutting the unidirectional prepreg tape into a plurality of master sheets with the same shape and size along the continuous fiber direction, and recording the master sheets as 0 DEG master sheets; cutting the unidirectional prepreg tape into a plurality of master sheets with the same shape and size along the direction of vertical continuous fibers, and recording the master sheets as 90 degrees; alternately and orthogonally stacking the 0-degree master slice group and the 90-degree master slice group;
s3, hot press molding: carrying out hot press molding on the placed master slice to obtain a continuous fiber reinforced thermoplastic composite material; the hot pressing temperature is 250-320 ℃, the pressure is 2-5MPa, and the time is 5-10min.
By adopting the technical scheme, the one-step molding is realized by adopting a hot-pressing process, the process is simple and easy to operate, the molding time is short, the product size is accurate and controllable, the manufacturing cost is low, and the method is suitable for mass production.
Wherein the hot pressing temperature in the hot pressing process can be any temperature of 250-320 ℃, the pressure can be any pressure of 2-5Mpa, and the time can be any time of 5-10min, for example, hot pressing for 10min at 250 ℃ and 5 Mpa; hot-pressing at 300 deg.C under 3Mpa for 8min; hot-pressing at 320 deg.C under 2Mpa for 5min, etc.
In a third aspect, the present application provides the use of any one of the continuous fibre reinforced thermoplastic composite materials described above in the manufacture of a paddle blade.
In summary, the application has the following beneficial effects:
1. the application adopts the mutual synergy of the polyether-ether-ketone, the continuous carbon fiber and the polysulfone to prepare the composite material, the maximum impact force of the prepared composite material can reach 2789-2875N, the tensile strength can reach 40.25-40.35Mpa, the elongation at break can reach 0.43-0.48%, and the prepared composite material has excellent impact performance and tensile performance.
2. In the application, the nano silicon dioxide is preferably adopted to carry out modification treatment on the continuous carbon fiber, the maximum impact force of the prepared composite material can reach 3395-3684N, the tensile strength can reach 40.61-42.37Mpa, the elongation at break can reach 0.53-0.85%, and the impact performance and the tensile performance of the composite material are further improved.
Detailed Description
The present application will be described in further detail with reference to examples.
Preparation examples of starting materials and intermediates
Raw materials
The raw materials of the embodiment of the application can be obtained by market;
polysulfone is named P-3500;
the model of the polyether-ether-ketone is LCL-4033EM;
the antioxidant is antioxidant 168;
the processing aid is silicone powder;
the silane coupling agent is KH-550.
Preparation example
Preparation example 1
A preparation method of the silane coupling agent modified nano silicon dioxide comprises the following steps:
the nano silicon dioxide is soaked in the silane coupling agent solution, stirred for 3 hours at 90 ℃, filtered, washed and dried in vacuum for 12 hours to obtain the silane coupling agent modified nano silicon dioxide.
Preparation example 2
An oxidized continuous carbon fiber, the preparation method of which comprises:
1) 1kg of silver nitrate is ultrasonically dissolved in water to obtain a silver nitrate solution;
2) Adding 16kg of potassium persulfate into the silver nitrate solution, and ultrasonically stirring until the solution is black to obtain an oxidation solution;
3) Soaking continuous carbon fiber in an oxidizing solution, and heating at 70 ℃ until the solution is transparent;
4) The continuous carbon fiber was taken out and washed, and dried in vacuum at 70℃for 8 hours.
Preparation example 3
An oxidized continuous carbon fiber, the preparation method of which comprises:
soaking continuous carbon fiber in HNO with concentration of 13mol/L 3 The solution was taken out after 2h and dried under vacuum at 70℃for 8h.
Preparation example 4
An oxidized continuous carbon fiber, the preparation method of which comprises:
the continuous carbon fiber is used as an anode, graphite is used as a cathode, ammonium bicarbonate is used as electrolyte, and the surface treatment is carried out on the carbon fiber through the chemical oxidation reaction of the anode.
Preparation example 5
A preparation method of the nano silicon dioxide modified continuous carbon fiber comprises the following steps:
10kg of nano silicon dioxide with the particle size of 40-60nm is dispersed in acetone by ultrasonic to obtain nano silicon dioxide suspension, 15kg of continuous carbon fiber is soaked in the nano silicon dioxide suspension to react for 30min at 80 ℃, then the continuous carbon fiber is taken out and dried at 100 ℃ to obtain the nano silicon dioxide modified continuous carbon fiber.
Preparation example 6
Unlike in preparation example 5, the amount of the continuous carbon fiber in preparation example 6 was 20kg.
Preparation example 7
Unlike in preparation example 5, the amount of the continuous carbon fiber in preparation example 7 was 25kg.
Preparation example 8
Unlike in preparation example 5, the amount of the continuous carbon fiber in preparation example 8 was 10kg.
Preparation example 9
Unlike in preparation example 5, the amount of the continuous carbon fiber in preparation example 9 was 30kg.
Preparation examples 10 to 12
Unlike in preparation example 7, the continuous carbon fibers in preparation examples 10 to 12 were derived from preparation examples 2 to 4, respectively.
Preparation example 13
Unlike preparation example 10, the nano silica in preparation example 13 is derived from preparation example 1.
PREPARATION EXAMPLE 14
Unlike preparation example 13, the nano silica in preparation example 14 has a particle size of 20 to 30nm.
Preparation example 15
Unlike preparation example 13, the nano-silica in preparation example 15 has a particle size of 80 to 100nm.
Examples
Examples 1 to 5
A preparation method of the continuous fiber reinforced thermoplastic composite material comprises the following steps:
s1, preparing a unidirectional prepreg tape: according to the raw material proportion in the table 1, the polyether-ether-ketone, the polysulfone, the antioxidant and the processing aid are melt blended and extruded at 380 ℃ to obtain a thermoplastic resin film; impregnating, cooling and rolling the continuous carbon fiber and the thermoplastic resin film to obtain a unidirectional prepreg tape;
s2, placing a master slice: cutting the unidirectional prepreg tape into a plurality of master sheets with the same shape and size along the continuous fiber direction, and recording the master sheets as 0 DEG master sheets; cutting the unidirectional prepreg tape into a plurality of master sheets with the same shape and size along the direction of vertical continuous fibers, and recording the master sheets as 90 degrees; alternately and orthogonally stacking the 0-degree master slice group and the 90-degree master slice group;
s3, hot press molding: carrying out hot press molding on the placed master slice to obtain a continuous fiber reinforced thermoplastic composite material; the hot pressing temperature is 300 ℃, the pressure is 3MPa, and the time is 8min.
Table 1 examples 1-5 raw materials proportioning table (kg)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Polyether-ether-ketone | 100 | 120 | 135 | 150 | 180 |
| Continuous carbon fiber | 250 | 220 | 200 | 180 | 150 |
| Polysulfone (PSO) | 5 | 8 | 10 | 12 | 15 |
| Antioxidant | 1.5 | 1.2 | 1.0 | 0.8 | 0.5 |
| Processing aid | 1.5 | 2.0 | 2.5 | 2.8 | 3.0 |
Examples 6 to 16
Unlike example 3, the continuous carbon fibers in examples 6 to 16 were derived from preparation examples 5 to 15, respectively.
Comparative example
Comparative example 1
Unlike example 1, the polyetheretherketone was replaced with an equivalent amount of polyethylene in comparative example 1.
Comparative example 2
Unlike example 1, the polyetheretherketone was replaced with an equivalent amount of polyetherimide in comparative example 2.
Comparative example 3
Unlike example 1, the carbon fibers were replaced with the same amount of aramid fibers in comparative example 3.
Comparative example 4
Unlike example 1, comparative example 4 does not contain polysulfone.
Performance test
Detection method/test method
Impact performance detection: the composites of examples 1 to 16 and comparative examples 1 to 4 were tested according to ASTM D7136, test method for evaluating the damage resistance of composite laminates, with a spherical punch having a diameter of 16mm and an impact energy of 20J.
Transverse tensile property detection: the composites of examples 1-16 and comparative examples 1-4 were tested according to ASTM D3039, polymer-based composite tensile Property test method, for a loading speed of 2mm/min.
The performance test results are shown in Table 2.
TABLE 2 Performance test results
As can be seen by combining examples 1-16 with comparative examples 1-4 and by combining Table 2, the maximum impact force of the composites of examples 1-16 is significantly higher than that of comparative examples 1-4, and the tensile strength and elongation at break of the composites of examples 1-16 are also better than those of comparative examples 1-4, indicating that the tensile properties and impact properties of the composites made according to the present application are better.
As can be seen from the combination of examples 1 and comparative examples 1 to 4 and table 2, the use of different thermoplastic resins in comparative examples 1 to 2, and the use of different fibers in comparative example 3, and the absence of polysulfone in comparative example 4, the impact and tensile properties of the composites of comparative examples 1 to 4 are significantly reduced as compared to example 1, probably because polysulfone enhances the dispersion of the continuous carbon fibers in the polyetheretherketone, and the polyetheretherketone and the continuous carbon fibers cooperate with each other to enhance the overall properties of the composites.
As can be seen from the combination of examples 1 to 16 and Table 1, the impact performance and tensile performance of the composite materials in examples 6 to 16 are better than those of examples 1 to 5, which is probably due to the fact that the continuous carbon fibers are modified by the nano silicon dioxide, the nano silicon dioxide is wrapped outside the continuous carbon fibers, the roughness of the surfaces of the nano carbon fibers is improved, active groups are formed on the surfaces of the continuous carbon fibers, the interface performance of fibers/resin in the composite materials is improved, and therefore the comprehensive performance of the composite materials is improved.
As can be seen from the combination of examples 6-10 and Table 1, the impact and tensile properties of the composites of examples 6-8 are better than those of examples 9-10, which means that the impact and tensile properties of the composite materials made from nanosilica and continuous carbon fibers in the ratio range defined in the application are better, and too much or too little ratio reduces the impact and tensile properties of the composite materials.
It can be seen from the combination of examples 7 and examples 11 to 13 and the combination of table 1 that the impact performance and tensile properties of the composites in examples 11 to 13 are better than those of example 7, which means that the impact performance and tensile properties of the composites can be improved by oxidizing the continuous carbon fibers before modifying the continuous carbon fibers with the nanosilicon dioxide, which is probably because the oxidation treatment can increase the active groups on the surface of the continuous carbon fibers and improve the interfacial properties of the fibers/resins in the composites, thereby improving the overall properties of the composites.
As can be seen from a combination of examples 11 and examples 14-16 and from table 1, the impact and tensile properties of the composites of examples 14-16 are better than those of example 11, which suggests that the silane coupling agent treatment of the nanosilica can improve the impact and tensile properties of the composites, probably because the silane coupling agent treatment of the nanosilica can reduce the agglomeration of the nanosilica and improve the dispersion of the nanosilica on the continuous carbon fibers, thereby improving the interfacial properties of the fibers/resins in the composites.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (4)
1. The continuous fiber reinforced thermoplastic composite material is characterized by comprising the following raw materials in parts by weight: 100-180 parts of polyether-ether-ketone, 150-250 parts of continuous carbon fiber, 15-30 parts of polysulfone, 0.5-1.5 parts of antioxidant and 1.5-3 parts of processing aid; the processing aid is silicone powder;
the continuous carbon fiber is modified by nano silicon dioxide, and the modification method comprises the following steps:
soaking continuous carbon fiber in acetone suspension of nano silicon dioxide, performing sizing treatment at 80-85 ℃, and then drying at 95-100 ℃ to obtain nano silicon dioxide modified continuous carbon fiber; the weight ratio of the nano silicon dioxide to the continuous carbon fiber is 1: (1.5-2.5);
the continuous carbon fiber is subjected to oxidation treatment, and the specific steps are as follows:
1) Ultrasonically dissolving silver nitrate in water to obtain a silver nitrate solution;
2) Adding potassium persulfate into a silver nitrate solution, and stirring until the solution is black to obtain an oxidation solution;
3) Soaking continuous carbon fiber in oxidizing solution, and heating at 65-75deg.C until the solution is transparent;
4) Taking out and cleaning the continuous carbon fiber, and then drying;
the nano silicon dioxide is modified by a silane coupling agent; the particle size of the nano silicon dioxide is 40-60nm.
2. A continuous fiber reinforced thermoplastic composite in accordance with claim 1, wherein: the material comprises the following raw materials in parts by weight: 120-150 parts of polyether-ether-ketone, 180-220 parts of continuous carbon fiber, 20-25 parts of polysulfone, 0.8-1.2 parts of antioxidant and 2-2.8 parts of processing aid.
3. A method of preparing a continuous fiber reinforced thermoplastic composite material according to any one of claims 1-2, comprising the steps of:
s1, preparing a unidirectional prepreg tape: melt blending polyether-ether-ketone, polysulfone, an antioxidant and a processing aid to obtain a thermoplastic resin film; impregnating, cooling and rolling the continuous carbon fiber and the thermoplastic resin film to obtain a unidirectional prepreg tape;
s2, placing a master slice: cutting the unidirectional prepreg tape into a plurality of master sheets with the same shape and size along the continuous fiber direction, and recording the master sheets as 0 DEG master sheets; cutting the unidirectional prepreg tape into a plurality of master sheets with the same shape and size along the direction of vertical continuous fibers, and recording the master sheets as 90 degrees; alternately and orthogonally stacking the 0-degree master slice group and the 90-degree master slice group;
s3, hot press molding: carrying out hot press molding on the placed master slice to obtain a continuous fiber reinforced thermoplastic composite material; the hot pressing temperature is 250-320 ℃, the pressure is 2-5MPa, and the time is 5-10min.
4. Use of a continuous fiber reinforced thermoplastic composite material according to any of claims 1-2 for the manufacture of a paddle blade.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210014081.5A CN114292490B (en) | 2022-01-06 | 2022-01-06 | Continuous fiber reinforced thermoplastic composite material and preparation method and application thereof |
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| CN202210014081.5A CN114292490B (en) | 2022-01-06 | 2022-01-06 | Continuous fiber reinforced thermoplastic composite material and preparation method and application thereof |
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| CN114292490A CN114292490A (en) | 2022-04-08 |
| CN114292490B true CN114292490B (en) | 2023-11-28 |
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