CN112480615A - Carbon fiber/PET composite material and preparation method and application thereof - Google Patents
Carbon fiber/PET composite material and preparation method and application thereof Download PDFInfo
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- CN112480615A CN112480615A CN202011435236.XA CN202011435236A CN112480615A CN 112480615 A CN112480615 A CN 112480615A CN 202011435236 A CN202011435236 A CN 202011435236A CN 112480615 A CN112480615 A CN 112480615A
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 59
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 59
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 65
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 65
- 239000002667 nucleating agent Substances 0.000 claims abstract description 43
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 30
- 239000008187 granular material Substances 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000012745 toughening agent Substances 0.000 claims abstract description 19
- 238000007639 printing Methods 0.000 claims abstract description 18
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- QYMGIIIPAFAFRX-UHFFFAOYSA-N butyl prop-2-enoate;ethene Chemical compound C=C.CCCCOC(=O)C=C QYMGIIIPAFAFRX-UHFFFAOYSA-N 0.000 claims description 7
- 229920006245 ethylene-butyl acrylate Polymers 0.000 claims description 7
- 238000001291 vacuum drying Methods 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 6
- 229920006225 ethylene-methyl acrylate Polymers 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 claims description 3
- 229940083037 simethicone Drugs 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 238000005491 wire drawing Methods 0.000 claims description 2
- 239000002202 Polyethylene glycol Substances 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 229920001223 polyethylene glycol Polymers 0.000 claims 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 238000005469 granulation Methods 0.000 abstract description 4
- 230000003179 granulation Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002270 dispersing agent Substances 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000004594 Masterbatch (MB) Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 238000010146 3D printing Methods 0.000 description 4
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 239000005043 ethylene-methyl acrylate Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920002545 silicone oil Polymers 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 208000034530 PLAA-associated neurodevelopmental disease Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/004—Additives being defined by their length
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
Abstract
The invention relates to a carbon fiber/PET composite material and a preparation method and application thereof. The carbon fiber/PET composite material is prepared from the following raw materials, by weight, 60-90 parts of polyethylene terephthalate, 10-40 parts of polybutylene terephthalate, 5-20 parts of chopped carbon fibers, 1-15 parts of a compatilizer, 10-30 parts of a flexibilizer, 0.1-1 part of a nucleating agent and 0.1-10 parts of other auxiliaries. The carbon fiber/PET composite material disclosed by the invention is prepared by firstly coating a nucleating agent on a compatilizer and a toughening agent so as to be beneficial to dispersion of the nucleating agent, then mixing the nucleating agent with PET, PBT, chopped carbon fiber and other auxiliaries according to a formula, adding the mixture into a double-screw extruder for extrusion granulation, drying the modified granules, and then extruding the dried granules through a single-screw extruder to obtain the wire rod suitable for an FDM printer. The prepared wire and the printed product have smooth and flat surfaces and do not warp or deform in the printing process. The nucleating agent can well coat the heated compatilizer, so that the nucleating agent can be well dispersed in the subsequent mixing, the addition of a dispersing agent can be reduced, and the cost is saved.
Description
Technical Field
The invention belongs to the technical field of materials for 3D printing, and particularly relates to a carbon fiber/PET composite material and a preparation method and application thereof.
Background
The fused deposition technology (FDM) has the highest occupancy in the 3D printing market, and its features such as rapid prototyping and low cost are popular in the industries of home, education, and literary creation. However, the existing wire materials are insufficient in types, have certain performance defects and cannot meet the requirements of more users, so that the development of FDM printing is restricted. Therefore, there is an urgent need for a novel functional wire.
In recent years, research on FDM printing of fiber composite thermoplastic material wires has become a hotspot. The composite material for FDM 3D printing mainly comprises fiber composite PLA and ABS, Carbon Fiber (CF)/nylon and carbon fiber/Polycarbonate (PC) exist in the market, and the mechanical property of a printed product can be improved by adding the fiber. Short fiber reinforced thermoplastic composites have a relatively simple and mature manufacturing process compared to long fibers.
Polyethylene terephthalate (PET) has many advantages as engineering plastics, such as excellent fatigue resistance, friction resistance and aging resistance, outstanding electrical insulation, low production energy consumption and good processability. However, the PET is directly used for 3D printing, and the mixed extrusion filamentation process has the defects of poor processability, too fast fluidity and the like, and even after printing and forming, the mechanical strength of the product is not high.
Therefore, the prepared CF/PET wire with excellent performance suitable for FDM printing has great significance for subsequent research and market.
Disclosure of Invention
The invention aims to provide a carbon fiber/PET composite material and a preparation method and application thereof.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a carbon fiber/PET composite material which is prepared from the following raw materials in parts by weight:
60-90 parts of polyethylene terephthalate (PET);
10-40 parts of polybutylene terephthalate (PBT);
5-20 parts of short carbon fibers;
1-15 parts of a compatilizer;
10-30 parts of a toughening agent;
0.1-1 part of nucleating agent;
0.1 to 10 portions of other auxiliary agents.
In one embodiment of the invention, the polyethylene terephthalate and polybutylene terephthalate are both extrusion grades and have melt indices of 15 to 35 g/min.
The invention takes the blend of polyethylene terephthalate and polybutylene terephthalate as the matrix resin of the composite material.
In one embodiment of the present invention, the chopped carbon fibers have a diameter of 7 to 10 μm and an aspect ratio of 10:1 to 13: 1.
In one embodiment of the present invention, the toughening agent is selected from one or more of ethylene-methyl acrylate (EMA) copolymer or ethylene-butyl acrylate (EBA) copolymer.
In one embodiment of the present invention, the compatibilizer is one or two or more selected from ethylene-methyl acrylate copolymers.
In one embodiment of the invention, the nucleating agent is selected from talc or a polyester nucleating agent.
In one embodiment of the present invention, the other auxiliary agent is selected from one or more of simethicone, an antioxidant or a silane coupling agent.
The invention also provides a preparation method of the carbon fiber/PET composite material, which comprises the following steps:
preparing the following raw materials in parts by weight: 60-90 parts of polyethylene terephthalate, 10-40 parts of polybutylene terephthalate, 5-20 parts of chopped carbon fibers, 1-15 parts of compatilizer, 10-30 parts of flexibilizer, 0.1-1 part of nucleating agent and 0.1-10 parts of other auxiliary agents;
A. respectively vacuum-drying PET, PBT, chopped carbon fiber, a compatilizer, a flexibilizer, a nucleating agent and other auxiliaries;
B. heating and high-speed mixing the toughening agent, the nucleating agent and the compatilizer, and heating by a high-speed mixer to enable the nucleating agent to be adhered to the surface of the compatilizer to obtain a mixed dispersing aid H1;
C. accurately weighing the PET, the PBT, the chopped carbon fibers and other additives dried in the step A according to a formula, and then mixing the PET, the PBT, the chopped carbon fibers and other additives with the mixed dispersing additive H1 in the step B to obtain a mixture H2;
D. mixing and extruding the mixture H2 through a double-screw extruder, and then cutting into granules through a granulator to obtain modified granules H3; drying the modified granules H3, and then carrying out wire drawing and extrusion molding by a single-screw extruder to obtain the carbon fiber/PET composite wire.
In one embodiment of the present invention, step B is carried out by heating and high-speed mixing in a high-speed mixer at a temperature of 45 to 60 ℃.
In the step D, the temperature of a charging barrel of the double-screw extruder is 190-260 ℃, the rotating speed of a screw is 10-100 rpm, and the processing temperature of the single-screw extruder is 220-270 ℃.
In one embodiment of the invention, the temperatures of the sections of the twin-screw extruder are set in sequence as follows: the first zone is 160-;
in one embodiment of the invention, the temperature of each heating region of the single-screw extruder is set to be 225 ℃ in the first region, 260 ℃ in the second region, 250 ℃ in the third region, 260 ℃ in the fourth region, 250 ℃ in the fourth region, 260 ℃ in the fifth region, 245 ℃ in the sixth region, 255 ℃ in the hot water temperature of 45-55 ℃ and 20-30 ℃ in the cold water temperature.
The invention also provides application of the carbon fiber/PET composite material, and particularly relates to the carbon fiber/PET composite material serving as a filament for FDM printing, wherein the filament has high strength and high toughness. Preferably, the wire diameter is 1.75mm or 3mm,
compared with the prior art, the invention has the beneficial effects that:
the carbon fiber/PET composite material is prepared by firstly mixing a compatilizer, a toughening agent and a nucleating agent at a high speed in a high-speed mixer to enable the nucleating agent to be adhered to the compatilizer and the toughening agent, so that the nucleating agent is favorably dispersed, then mixing the nucleating agent with PET, PBT, chopped carbon fiber and other auxiliaries according to a formula, adding the mixture into a double-screw extruder to extrude and granulate, drying the modified granules, and then extruding the dried granules through a single-screw extruder to obtain the wire rod suitable for an FDM printer. The prepared wire and the printed product have smooth and flat surfaces and do not warp or deform in the printing process. The nucleating agent can well coat the heated compatilizer, and the method can well disperse the nucleating agent in the subsequent mixing, reduce the addition of the dispersing agent and save the cost.
Detailed Description
The present invention will be described in detail with reference to specific examples.
Example 1
The embodiment provides a carbon fiber/PET composite material for FDM printing, which comprises the following components in parts by weight:
the preparation method of the carbon fiber/PET composite material for FDM printing comprises the following steps of 80 parts of PET, 20 parts of PBT, 7 parts of a compatilizer (AX8900), and 20 parts of a toughening agent A (EBA):
respectively vacuum-drying PET, PBT, a compatilizer and a flexibilizer;
the compounding is mixed through the twin-screw and is extruded, cuts grain on the pelleter, obtains the modified aggregate, and the twin-screw extruder each section temperature sets gradually: 170 ℃ in the first zone, 180 ℃ in the second zone, 200 ℃ in the third zone, 245 ℃ in the fourth zone, 245 ℃ in the fifth zone, 245 ℃ in the sixth zone, 250 ℃ in the seventh zone, 250 ℃ in the eighth zone, 250 ℃ in the ninth zone, 240 ℃ at the head, 300r/min at the main engine speed and 15r/min at the feeding frequency;
drying the modified granules, extruding the dried modified granules by a single screw, and controlling the diameter of an extruded filament within the range of the printer. The temperature of each heating region of the single-screw extruder is set to be 220 ℃ in the first region, 265 ℃ in the second region, 265 ℃ in the third region, 265 ℃ in the fourth region, 265 ℃ in the fifth region, 255 ℃ in the sixth region, 50 ℃ for hot water and 30 ℃ for cold water.
Example 2
The embodiment provides a carbon fiber/PET composite material for FDM printing, which comprises the following components in parts by weight:
70 parts of PET, 30 parts of PBT, 10 parts of compatilizer (AX8900), and 15 parts of flexibilizer B (EMA)
The preparation method of the carbon fiber/PET composite material for FDM printing comprises the following steps:
respectively vacuum-drying PET, PBT, a compatilizer and a flexibilizer;
the compounding is mixed through the twin-screw and is extruded, cuts grain on the pelleter, obtains modified aggregate H3, and each section temperature of screw extruder sets gradually as: 170 ℃ in the first zone, 180 ℃ in the second zone, 200 ℃ in the third zone, 240 ℃ in the fourth zone, 240 ℃ in the fifth zone, 245 ℃ in the sixth zone, 250 ℃ in the seventh zone, 250 ℃ in the eighth zone, 250 ℃ in the ninth zone, 240 ℃ in the head, 300r/min of the rotating speed of the main engine and 15r/min of the feeding frequency;
drying the modified granules, extruding the dried modified granules by a single screw, and controlling the diameter of an extruded filament within the range of the printer. The temperature of each heating zone of the single-screw extruder is set to be 200 ℃ in a first zone, 260 ℃ in a second zone, 260 ℃ in a third zone, 260 ℃ in a fourth zone, 260 ℃ in a fifth zone, 250 ℃ in a sixth zone, 50 ℃ of hot water and 25 ℃ of cold water.
Example 3
The embodiment provides a carbon fiber/PET composite material for FDM printing, which comprises the following components in parts by weight:
80 parts of PET, 20 parts of PBT, 4 parts of compatilizer (AX8900), 15 parts of toughener A (EBA) and 0.5 part of nucleating agent A (talcum powder)
The preparation method of the carbon fiber/PET composite material for FDM printing comprises the following steps:
respectively vacuum-drying PET, PBT, chopped carbon fiber, a compatilizer, a flexibilizer and a nucleating agent;
weighing a toughening agent, a compatilizer and a nucleating agent according to a formula, mixing the toughening agent, the compatilizer and the nucleating agent at a high speed in a high-speed mixer, and coating the nucleating agent on the compatilizer by utilizing heat generated in the high-speed mixing process to obtain a mixed master batch H1;
mixing the mixed master batch H1 obtained in the step B with the weighed PET and PBT to obtain a mixture H2;
and (3) carrying out mixing extrusion on the mixture H2 through a double screw, and carrying out granulation on a granulator to obtain modified granules H3, wherein the temperature of each section of the screw extruder is sequentially set as follows: the first zone is 180 ℃, the second zone is 190 ℃, the third zone is 200 ℃, the fourth zone is 245 ℃, the fifth zone is 245 ℃, the sixth zone is 250 ℃, the seventh zone is 250 ℃, the eighth zone is 255 ℃, the ninth zone is 255 ℃, the head is 245 ℃, the main engine speed is 300r/min, and the feeding frequency is 15 r/min;
drying the modified granules, extruding the dried modified granules by a single screw, and controlling the diameter of an extruded filament within the range of the printer. The temperature of each heating zone of the single-screw extruder is set to be 220 ℃ in the first zone, 265 ℃ in the second zone, 265 ℃ in the third zone, 265 ℃ in the fourth zone, 265 ℃ in the fifth zone, 265 ℃ in the sixth zone, 50 ℃ in the hot water temperature and 30 ℃ in the cold water temperature.
Example 4
70 parts of PET, 30 parts of PBT, 5 parts of chopped carbon fiber, 4 parts of compatilizer (AX8900), 15 parts of toughener A (EBA), 0.2 part of nucleating agent B (polyester nucleating agent), 3g of dimethyl silicone oil and 0.2 part of antioxidant
The preparation method of the carbon fiber/PET composite material for FDM printing comprises the following steps:
respectively vacuum-drying PET, PBT, chopped carbon fiber, a compatilizer, a flexibilizer, a nucleating agent and an antioxidant;
weighing a toughening agent, a compatilizer and a nucleating agent according to a formula, mixing the toughening agent, the compatilizer and the nucleating agent at a high speed in a high-speed mixer, and coating the nucleating agent on the compatilizer by utilizing heat generated in the high-speed mixing process to obtain a mixed master batch H1;
mixing the mixed master batch H1 obtained in the step B with the weighed PET, PBT, chopped carbon fibers, antioxidant and dimethyl silicone oil to obtain a mixture H2;
and (3) carrying out mixing extrusion on the mixture H2 through a double screw, and carrying out granulation on a granulator to obtain modified granules H3, wherein the temperature of each section of the screw extruder is sequentially set as follows: 170 ℃ in the first zone, 180 ℃ in the second zone, 200 ℃ in the third zone, 245 ℃ in the fourth zone, 250 ℃ in the fifth zone, 250 ℃ in the sixth zone, 250 ℃ in the seventh zone, 255 ℃ in the eighth zone, 255 ℃ in the ninth zone, 245 ℃ in the head, 300r/min in the rotating speed of the main engine and 15r/min in the feeding frequency;
drying the modified granules, extruding the dried modified granules by a single screw, and controlling the diameter of an extruded filament within the range of the printer. The temperature of each heating region of the single-screw extruder is set to be 220 ℃ in the first region, 265 ℃ in the second region, 265 ℃ in the third region, 265 ℃ in the fourth region, 265 ℃ in the fifth region, 255 ℃ in the sixth region, 50 ℃ for hot water and 30 ℃ for cold water.
Example 5
80 parts of PET, 20 parts of PBT, 10 parts of chopped carbon fiber, 4 parts of compatilizer (AX8900), 15 parts of toughener A (EBA), 0.2 part of nucleating agent B (polyester nucleating agent), 0.2 part of antioxidant, 4g of dimethyl silicone oil and 3g of silane coupling agent
The preparation method of the carbon fiber/PET composite material for FDM printing comprises the following steps:
respectively vacuum-drying PET, PBT, chopped carbon fiber, a compatilizer, a flexibilizer, a nucleating agent and an antioxidant;
weighing a toughening agent, a compatilizer and a nucleating agent according to a formula, mixing the toughening agent, the compatilizer and the nucleating agent at a high speed in a high-speed mixer, and coating the nucleating agent on the compatilizer by utilizing heat generated in the high-speed mixing process to obtain a mixed master batch H1;
mixing the mixed master batch H1 obtained in the step B with the weighed PET, PBT, chopped carbon fibers, an antioxidant, simethicone and a silane coupling agent to obtain a mixture H2;
and (3) carrying out mixing extrusion on the mixture H2 through a double screw, and carrying out granulation on a granulator to obtain modified granules H3, wherein the temperature of each section of the screw extruder is sequentially set as follows: the first zone is 180 ℃, the second zone is 190 ℃, the third zone is 210 ℃, the fourth zone is 250 ℃, the fifth zone is 250 ℃, the sixth zone is 250 ℃, the seventh zone is 255 ℃, the eighth zone is 255 ℃, the ninth zone is 255 ℃, the head is 245 ℃, the rotating speed of the main engine is 300r/min, and the feeding frequency is 15 r/min;
drying the modified granules, extruding the dried modified granules by a single screw, and controlling the diameter of an extruded filament within the range of the printer. The temperature of each heating zone of the single-screw extruder is set to be 220 ℃ in the first zone, 265 ℃ in the second zone, 265 ℃ in the third zone, 265 ℃ in the fourth zone, 265 ℃ in the fifth zone, 250 ℃ in the sixth zone, 50 ℃ for hot water and 25 ℃ for cold water.
The wires of examples 1-5 were printed on a sample through an FDM 3D printer to check the print effect and test the sample performance, the print conditions were: the temperature of the printing nozzle is 260 ℃, the temperature of the bottom plate is 60 ℃, and the printing speed is 60 mm/s. The tensile strength (GB/T1040.2-2006) and impact strength (GB/T1043.1-2008) of the printed splines were measured, and the presence or absence of warpage of the splines was observed, with the results shown in Table 1.
Table 1 materials print results and performance results for examples 1-5
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The carbon fiber/PET composite material is characterized by being prepared from the following raw materials in parts by weight:
60-90 parts of polyethylene glycol terephthalate;
10-40 parts of polybutylene terephthalate;
5-20 parts of short carbon fibers;
1-15 parts of a compatilizer;
10-30 parts of a toughening agent;
0.1-1 part of nucleating agent;
0.1 to 10 portions of other auxiliary agents.
2. The carbon fiber/PET composite of claim 1, wherein the polyethylene terephthalate and polybutylene terephthalate are both extrusion grades and have a melt index of 15-35 g/min.
3. The carbon fiber/PET composite material according to claim 1, wherein the chopped carbon fibers have a diameter of 7 to 10 μm and an aspect ratio of 10:1 to 13: 1.
4. The carbon fiber/PET composite material according to claim 1, wherein the toughening agent is selected from one or more of ethylene-methyl acrylate copolymer and ethylene-butyl acrylate copolymer.
5. The carbon fiber/PET composite material according to claim 1, wherein the compatibilizer is one or more selected from ethylene-methyl acrylate copolymers.
6. The carbon fiber/PET composite material according to claim 1, wherein the nucleating agent is selected from talc or a polyester nucleating agent.
7. The carbon fiber/PET composite material as claimed in claim 1, wherein the other auxiliary agent is selected from one or more of simethicone, antioxidant or silane coupling agent.
8. A method for preparing a carbon fiber/PET composite material as claimed in any one of claims 1 to 7, characterized by comprising the steps of:
preparing the following raw materials in parts by weight: 60-90 parts of polyethylene terephthalate, 10-40 parts of polybutylene terephthalate, 5-20 parts of chopped carbon fibers, 1-15 parts of compatilizer, 10-30 parts of flexibilizer, 0.1-1 part of nucleating agent and 0.1-10 parts of other auxiliary agents;
A. respectively vacuum-drying PET, PBT, chopped carbon fiber, a compatilizer, a flexibilizer, a nucleating agent and other auxiliaries;
B. heating and high-speed mixing the toughening agent, the nucleating agent and the compatilizer, and heating by a high-speed mixer to enable the nucleating agent to be adhered to the surface of the compatilizer to obtain a mixed dispersing aid H1;
C. accurately weighing the PET, the PBT, the chopped carbon fibers and other additives dried in the step A according to a formula, and then mixing the PET, the PBT, the chopped carbon fibers and other additives with the mixed dispersing additive H1 in the step B to obtain a mixture H2;
D. mixing and extruding the mixture H2 through a double-screw extruder, and then cutting into granules through a granulator to obtain modified granules H3; drying the modified granules H3, and then carrying out wire drawing and extrusion molding by a single-screw extruder to obtain the carbon fiber/PET composite wire.
9. The method for preparing a carbon fiber/PET composite material according to claim 8, wherein in the step B, the carbon fiber/PET composite material is heated and mixed at a high speed in a high speed mixer, the temperature of the high speed mixer is 45-60 ℃,
in the step D, the temperature of a charging barrel of the double-screw extruder is 190-260 ℃, the rotating speed of a screw is 10-100 rpm, and the processing temperature of the single-screw extruder is 220-270 ℃.
10. Use of the carbon fiber/PET composite material according to any one of claims 1 to 7 as a filament for FDM printing.
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| CN114196112A (en) * | 2021-12-28 | 2022-03-18 | 黑龙江鑫达企业集团有限公司 | PP/CF composite wire for FDM 3D printing and preparation method thereof |
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Application publication date: 20210312 |