CN113943477A - High-performance PET composite material and preparation method thereof - Google Patents
High-performance PET composite material and preparation method thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 229920003366 poly(p-phenylene terephthalamide) Polymers 0.000 claims abstract description 55
- 239000000835 fiber Substances 0.000 claims abstract description 49
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims abstract description 33
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 claims abstract description 29
- 239000000243 solution Substances 0.000 claims description 44
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 42
- VHYFNPMBLIVWCW-UHFFFAOYSA-N 4-Dimethylaminopyridine Chemical compound CN(C)C1=CC=NC=C1 VHYFNPMBLIVWCW-UHFFFAOYSA-N 0.000 claims description 38
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 21
- 238000005406 washing Methods 0.000 claims description 21
- 238000005303 weighing Methods 0.000 claims description 21
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 20
- 239000003054 catalyst Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 10
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 10
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 7
- 238000000967 suction filtration Methods 0.000 claims description 7
- -1 CeO2-g-KH540 Chemical compound 0.000 claims description 6
- ZAAQJFLUOUQAOG-UHFFFAOYSA-N 4-benzyl-2,6-ditert-butylphenol Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CC=2C=CC=CC=2)=C1 ZAAQJFLUOUQAOG-UHFFFAOYSA-N 0.000 claims description 2
- 239000007983 Tris buffer Substances 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 229920006231 aramid fiber Polymers 0.000 abstract description 2
- 230000003993 interaction Effects 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 230000003746 surface roughness Effects 0.000 abstract description 2
- 239000004760 aramid Substances 0.000 abstract 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 34
- 239000005020 polyethylene terephthalate Substances 0.000 description 34
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 7
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 6
- VSAWBBYYMBQKIK-UHFFFAOYSA-N 4-[[3,5-bis[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-2,4,6-trimethylphenyl]methyl]-2,6-ditert-butylphenol Chemical compound CC1=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C1CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 VSAWBBYYMBQKIK-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 230000036314 physical performance Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009864 tensile test Methods 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
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
- C08K2003/2213—Oxides; Hydroxides of metals of rare earth metal of cerium
-
- 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
- C08K2201/011—Nanostructured additives
-
- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a high-performance PET composite material and a preparation method thereof, the technical scheme is that a layered CeO2@ PPTA material is successfully prepared by electrostatic assembly between 2-butenoic acid grafted to a PPTA fiber with negative charge and positive charge CeO2-g-KH540, the KH540 is grafted to enhance the dispersibility, CeO2 particles are almost uniformly dispersed on the surface, and the CeO2 component on the PPTA surface obviously changes the form and highly increases the surface roughness of aramid fibers. With increasing roughness, the interfacial interaction between the roughened CeO2@ PPTA and the PET matrix is greatly enhanced, which will result in an improvement in the mechanical properties of the PET composite.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a high-performance PET composite material and a preparation method thereof.
Background
Polyethylene terephthalate (PET) is a widely used high molecular polyester resin, and PET has the advantages of good fatigue resistance, good heat resistance, excellent dimensional stability and the like, but in some specific application fields, the physical performance requirement of PET is high, and the common PET material cannot meet the requirement, so that the application of the PET composite material in some specific fields is limited.
Disclosure of Invention
The invention aims to provide a high-performance PET composite material and a preparation method thereof, so as to improve the physical performance of the PET material and expand the application field of the PET composite material.
In order to achieve the purpose, the method is realized by the following technical scheme:
a high-performance PET composite material and a preparation method thereof are prepared from the following components in parts by weight:
80-100 parts of PET;
CeO216-20 parts of @ PPTA fiber;
0.1 to 0.5 portion of antioxidant.
Further, the CeO2The preparation method of the @ PPTA fiber comprises the following steps:
(1) weighing PPTA fiber, 2-butenoic acid, ethanol and a catalyst 4-dimethylaminopyridine in set amounts, putting the PPTA fiber, the 2-butenoic acid, the ethanol and the catalyst into a reaction vessel, and reacting for 10-12h under the irradiation of a UV lamp to obtain a solution A;
(2) carrying out suction filtration, washing and drying on the solution A to obtain PPTA fiber grafted 2-butenoic acid;
(3) weighing the set amount of nano CeO2Putting the silane coupling agent KH-540 and ethanol into a reaction vessel, and reacting in water bath at 60-80 ℃ for 10-16h to obtain a solution B;
(4) filtering, washing and drying the solution B to obtain CeO2-g-KH540；
(5) Weighing PPTA fiber grafted 2-butenoic acid and CeO in set amount2-g-KH540, tetrahydrofuran and catalyst 4-dimethylaminopyridine, placing into a reaction vessel, and reacting in a water bath at 50-70 ℃ for 8-12h to obtain a solution C;
(6) filtering, washing and drying the solution C to obtain CeO2@ PPTA fiber.
Further, the mass ratio of the PPTA fiber, the 2-butenoic acid, the ethanol and the catalyst 4-dimethylaminopyridine in the step (1) is (30-40): (10-20): (100-120): (0.6-0.8).
Further, the nano CeO in the step (3)2The mass ratio of the silane coupling agent KH-540 to the ethanol is (20-30): (2-6): (140-180).
Further, grafting 2-butenoic acid and CeO on the PPTA fiber in the step (5)2-g-KH540, tetrahydrofuran, catalyst 4-dimethylaminopyridine in a mass ratio of (30-40): (20-30): (80-100): (0.6-0.8).
Further, the antioxidant is one or a mixture of more of tris (2, 4-di-tert-butyl) phenyl phosphite, tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester or 1, 3, 5-trimethyl-2, 4, 6- (3, 5-di-tert-butyl-4-hydroxybenzyl) benzene.
A preparation method of a high-performance PET composite material comprises the following steps:
(1) weighing 80-100 parts of PET and 16-20 parts of CeO2Mixing and uniformly stirring the @ PPTA fiber and 0.1-0.5 part of antioxidant to obtain a mixture;
(2) and (2) extruding and granulating the mixture obtained in the step (1) from an extruder to obtain the high-performance PET composite material.
Further, the step (2) is specifically as follows:
and (2) putting the mixture obtained in the step (1) into a hopper of a double-screw extruder to extrude and granulate, so as to obtain the PET composite material, wherein the double-screw extruder comprises six temperature zones which are sequentially arranged, the temperature of the first zone is 240-260 ℃, the temperature of the second zone is 280-300 ℃, the temperature of the third zone is 280-300 ℃, the temperature of the fourth zone is 280-300 ℃, the temperature of the fifth zone is 280-300 ℃, the temperature of the sixth zone is 280-300 ℃, the temperature of a machine head is 280-300 ℃, and the rotation speed of a screw is 200-280 r/min.
The invention has the beneficial effects that:
(1) according to the application, the layered CeO2@ PPTA material is successfully prepared by electrostatic assembly between PPTA fiber with negative charge and positive charge CeO2-g-KH 540.
(2) Since the KH540 grafting enhances the dispersibility, CeO2 particles are almost uniformly spread on the surface. The composition of CeO2 on the PPTA surface significantly changed the morphology and highly increased the aramid fiber surface roughness. With increasing roughness, the interfacial interaction between the roughened CeO2@ PPTA and the PET matrix is greatly enhanced, which will result in an improvement in the mechanical properties of the PET composite.
Detailed Description
The following embodiments are merely exemplary, and can be used to explain and illustrate the technical solution of the present invention, but not be construed as limiting the technical solution of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
The raw materials used in the examples of the invention are as follows:
PET (model 008L), Aclo, canada; nano CeO2, beijing german island gold technologies ltd; silane coupling agent KH-540 (gamma-aminopropyltrimethoxysilane), Nanjing Aureox chemical Co., Ltd; 2-butenoic acid, Shanghai Homing chemical Co., Ltd; ethanol, denna chemical limited; 4-dimethylaminopyridine, Shandong England chemical Co., Ltd; tetrahydrofuran, Shandong Yangso chemical Co., Ltd; PPTA fibers, dupont, usa; antioxidants (type Irganox168, Irganox1010, Irganox1330), from Bassfer.
The test instrument used in the present invention is as follows:
model ZSK30 twin-screw extruder, W & P, Germany; JL-1000 type tensile testing machine, produced by Guangzhou Youcai laboratory instruments; HTL900-T-5B injection molding machine, manufactured by Haita plastics machinery, Inc.; XCJ-500 impact tester, manufactured by Chengde tester; QT-1196 tensile tester, Gaotai detection instruments, Inc. of Dongguan; QD-GJS-B12K model high-speed mixer, HengOde instruments, Beijing.
Preparation example 1
(1) 300g of PPTA fiber, 100g of 2-butenoic acid, 1.0kg of ethanol and 6g of catalyst 4-dimethylaminopyridine are weighed and put into a reaction vessel to react for 10 hours under the irradiation of a UV lamp, so as to obtain a solution A.
(2) And carrying out suction filtration, washing and drying on the solution A to obtain the PPTA fiber grafted 2-butenoic acid.
(3) Weighing 200g of nano CeO220g of silane coupling agent KH-540 (gamma-aminopropyl trimethoxy silane) and 1.4kg of ethanol are put into a reaction vessel and react in a water bath at 60 ℃ for 10 hours to obtain solution B.
(4) Filtering, washing and drying the solution B to obtain CeO2-g-KH540。
(5) Weighing 300g of PPTA fiber grafted 2-butenoic acid and 200g of CeO2-g-KH540, 800g tetrahydrofuran, 6g catalyst 4-dimethylaminopyridine, placing into a reaction vessel, and reacting in a water bath at 50 ℃ for 8h to obtain a solution C.
(6) Filtering, washing and drying the solution C to obtain CeO2@ PPTA fiber M1.
Example 1
(1) Weighing 80 parts of PET, 16 parts of CeO2@ PPTA fiber M1 and 0.1 part of antioxidant Irganox1010, mixing and uniformly stirring to obtain a mixture;
(2) and (3) extruding and granulating the mixture obtained in the step (1) from an extruder to obtain the PET composite material P1.
Wherein the temperature and the screw rotating speed of each area of the double-screw extruder are respectively as follows: the temperature of the first zone is 240 ℃, the temperature of the second zone is 280 ℃, the temperature of the third zone is 280 ℃, the temperature of the fourth zone is 280 ℃, the temperature of the fifth zone is 280 ℃, the temperature of the sixth zone is 280 ℃, the temperature of a machine head is 280 ℃ and the rotating speed of a screw is 200 r/min.
Preparation example 2
(1) 400g of PPTA fiber, 200g of 2-butenoic acid, 1.2kg of ethanol and 8g of catalyst 4-dimethylaminopyridine are weighed and put into a reaction vessel to react for 12 hours under the irradiation of a UV lamp, so as to obtain a solution A.
(2) And carrying out suction filtration, washing and drying on the solution A to obtain the PPTA fiber grafted 2-butenoic acid.
(3) Weighing 300g of nano CeO260g of silane coupling agent KH-540 (gamma-aminopropyltrimethoxysilane), 1.8kg of ethanol, and the like were addedAnd (3) reacting in a water bath at 80 ℃ for 16h in a reaction vessel to obtain a solution B.
(4) Filtering, washing and drying the solution B to obtain CeO2-g-KH540。
(5) Weighing 400g of PPTA fiber grafted 2-butenoic acid and 300g of CeO2-g-KH540, 1.0kg tetrahydrofuran, 8g catalyst 4-dimethylaminopyridine, placing into a reaction vessel, and reacting in a water bath at 70 ℃ for 12h to obtain a solution C.
(6) Filtering, washing and drying the solution C to obtain CeO2@ PPTA fiber M2.
Example 2
(1) Weighing 100 parts of PET, 20 parts of CeO2@ PPTA fiber M2, 0.1 part of Irganox1010, 0.2 part of Irganox168 and 0.2 part of Irganox1330, mixing and uniformly stirring to obtain a mixture;
(2) and (3) extruding and granulating the mixture obtained in the step (1) from an extruder to obtain the PET composite material P2.
Wherein the temperature and the screw rotating speed of each area of the double-screw extruder are respectively as follows: the temperature of the first zone is 260 ℃, the temperature of the second zone is 300 ℃, the temperature of the third zone is 300 ℃, the temperature of the fourth zone is 300 ℃, the temperature of the fifth zone is 300 ℃, the temperature of the sixth zone is 300 ℃, the temperature of the machine head is 300 ℃ and the screw rotation speed is 280 r/min.
Preparation example 3
(1) 350g of PPTA fiber, 150g of 2-butenoic acid, 1.1kg of ethanol and 7g of catalyst 4-dimethylaminopyridine are weighed and put into a reaction vessel to react for 11 hours under the irradiation of a UV lamp, so as to obtain a solution A.
(2) And carrying out suction filtration, washing and drying on the solution A to obtain the PPTA fiber grafted 2-butenoic acid.
(3) Weighing 250g of nano CeO240g of silane coupling agent KH-540 (gamma-aminopropyl trimethoxy silane) and 1.6kg of ethanol are put into a reaction vessel and react in a water bath at 70 ℃ for 13 hours to obtain solution B.
(4) Filtering, washing and drying the solution B to obtain CeO2-g-KH540。
(5) Weighing 350g of PPTA fiber grafted 2-butenoic acid and 250g of CeO2-g-KH540, 900g tetrahydrofuran, 7g catalyst 4-dimethylaminopyridine, placing into a reaction vessel, reacting in a water bath at 60 ℃ for 10h,solution C was obtained.
(6) Filtering, washing and drying the solution C to obtain CeO2@ PPTA fiber M3.
Example 3
(1) Weighing 90 parts of PET, 18 parts of CeO2@ PPTA fiber M3, 0.1 part of Irganox168 and 0.2 part of Irganox1010, mixing and uniformly stirring to obtain a mixture;
(2) and (3) extruding and granulating the mixture obtained in the step (1) from an extruder to obtain the PET composite material P3.
Wherein the temperature and the screw rotating speed of each area of the double-screw extruder are respectively as follows: the temperature of the first zone is 250 ℃, the temperature of the second zone is 290 ℃, the temperature of the third zone is 290 ℃, the temperature of the fourth zone is 290 ℃, the temperature of the fifth zone is 290 ℃, the temperature of the sixth zone is 290 ℃, the temperature of the machine head is 290 ℃, and the rotating speed of the screw is 240 r/min.
Preparation example 4
(1) 395g of PPTA fiber, 165g of 2-butenoic acid, 1.15kg of ethanol and 7.5g of catalyst 4-dimethylaminopyridine are weighed and put into a reaction vessel to react for 10 hours under the irradiation of a UV lamp, so as to obtain a solution A.
(2) And carrying out suction filtration, washing and drying on the solution A to obtain the PPTA fiber grafted 2-butenoic acid.
(3) Weighing 280g of nano CeO255g of silane coupling agent KH-540 (gamma-aminopropyl trimethoxy silane) and 1.56kg of ethanol are put into a reaction vessel and react in a water bath at 65 ℃ for 12 hours to obtain solution B.
(4) Filtering, washing and drying the solution B to obtain CeO2-g-KH540。
(5) 380g of PPTA fiber grafted 2-butenoic acid and 290g of CeO are weighed2-g-KH540, 850g tetrahydrofuran, 6.5g catalyst 4-dimethylaminopyridine, placing into a reaction vessel, and reacting in a water bath at 55 ℃ for 11h to obtain a solution C.
(6) Filtering, washing and drying the solution C to obtain CeO2@ PPTA fiber M4.
Example 4
(1) Weighing 85 parts of PET, 17 parts of CeO2@ PPTA fiber M4, 0.1 part of Irganox1010 and 0.2 part of Irganox1330, mixing and uniformly stirring to obtain a mixture;
(2) and (3) extruding and granulating the mixture obtained in the step (1) from an extruder to obtain the PET composite material P4.
Wherein the temperature and the screw rotating speed of each area of the double-screw extruder are respectively as follows: the temperature of the first zone is 245 ℃, the temperature of the second zone is 285 ℃, the temperature of the third zone is 285 ℃, the temperature of the fourth zone is 285 ℃, the temperature of the fifth zone is 285 ℃, the temperature of the sixth zone is 285 ℃, the temperature of a machine head is 285 ℃, and the rotating speed of a screw is 255 r/min.
Preparation example 5
(1) 325g of PPTA fiber, 105g of 2-butenoic acid, 1.08kg of ethanol and 7.5g of catalyst 4-dimethylaminopyridine are weighed and put into a reaction vessel to react for 12 hours under the irradiation of a UV lamp, so as to obtain a solution A.
(2) And carrying out suction filtration, washing and drying on the solution A to obtain the PPTA fiber grafted 2-butenoic acid.
(3) 295g of nano CeO is weighed255g of silane coupling agent KH-540 (gamma-aminopropyl trimethoxy silane) and 1.75kg of ethanol are put into a reaction vessel and react in a water bath at the temperature of 75 ℃ for 15 hours to obtain solution B.
(4) Filtering, washing and drying the solution B to obtain CeO2-g-KH540。
(5) 385g of PPTA fiber grafted 2-butenoic acid and 295g of CeO are weighed2-g-KH540, 950g tetrahydrofuran, 6.5g catalyst 4-dimethylaminopyridine, placing into a reaction vessel, and reacting in a water bath at 58 ℃ for 11h to obtain a solution C.
(6) Filtering, washing and drying the solution C to obtain CeO2@ PPTA fiber M5.
Example 5
(1) Weighing 95 parts of PET, 19 parts of CeO2@ PPTA fiber M5, 0.1 part of Irganox1010 and 0.1 part of Irganox168, mixing and uniformly stirring to obtain a mixture;
(2) and (3) extruding and granulating the mixture obtained in the step (1) from an extruder to obtain the PET composite material P5.
Wherein the temperature and the screw rotating speed of each area of the double-screw extruder are respectively as follows: the temperature of the first zone is 250 ℃, the temperature of the second zone is 295 ℃, the temperature of the third zone is 295 ℃, the temperature of the fourth zone is 295 ℃, the temperature of the fifth zone is 295 ℃, the temperature of the sixth zone is 295 ℃, the temperature of a machine head is 295 ℃, and the rotating speed of a screw is 270 r/min.
Comparative example 1
(1) Weighing 85 parts of PET, 19 parts of PPTA fiber, 0.1 part of Irganox1010 and 0.1 part of Irganox168, mixing and uniformly stirring to obtain a mixture;
(2) and (3) extruding and granulating the mixture obtained in the step (1) from an extruder to obtain the PET composite material D1.
Wherein the temperature and the screw rotating speed of each area of the double-screw extruder are respectively as follows: the temperature of the first zone is 250 ℃, the temperature of the second zone is 295 ℃, the temperature of the third zone is 295 ℃, the temperature of the fourth zone is 295 ℃, the temperature of the fifth zone is 295 ℃, the temperature of the sixth zone is 295 ℃, the temperature of a machine head is 295 ℃, and the rotating speed of a screw is 270 r/min.
The PET composite materials prepared in the above examples 1-5 and comparative example 1 were molded into bars by an injection molding machine, and the test data are as follows:
it can also be seen from the table that the physical properties of examples 1-5 are all better than those of comparative example 1. Has very important significance for expanding the application field of the PET composite material.
The above disclosure is only for the purpose of describing several embodiments of the present application, but the present application is not limited thereto, and any variations that can be considered by those skilled in the art are intended to fall within the scope of the present application.
Claims (8)
1. The high-performance PET composite material is characterized by being prepared from the following components in parts by weight:
80-100 parts of PET;
CeO216-20 parts of @ PPTA fiber;
0.1 to 0.5 portion of antioxidant.
2. The high performance PET composite material of claim 1 and its preparationMethod characterized in that the CeO2The preparation method of the @ PPTA fiber comprises the following steps:
(1) weighing PPTA fiber, 2-butenoic acid, ethanol and a catalyst 4-dimethylaminopyridine in set amounts, putting the PPTA fiber, the 2-butenoic acid, the ethanol and the catalyst into a reaction vessel, and reacting for 10-12h under the irradiation of a UV lamp to obtain a solution A;
(2) carrying out suction filtration, washing and drying on the solution A to obtain PPTA fiber grafted 2-butenoic acid;
(3) weighing the set amount of nano CeO2Putting the silane coupling agent KH-540 and ethanol into a reaction vessel, and reacting in water bath at 60-80 ℃ for 10-16h to obtain a solution B;
(4) filtering, washing and drying the solution B to obtain CeO2-g-KH540；
(5) Weighing PPTA fiber grafted 2-butenoic acid and CeO in set amount2-g-KH540, tetrahydrofuran and catalyst 4-dimethylaminopyridine, placing into a reaction vessel, and reacting in a water bath at 50-70 ℃ for 8-12h to obtain a solution C;
(6) filtering, washing and drying the solution C to obtain CeO2@ PPTA fiber.
3. The high-performance PET composite material and the preparation method thereof as claimed in claim 2, wherein the mass ratio of PPTA fiber, 2-butenoic acid, ethanol and catalyst 4-dimethylaminopyridine in the step (1) is (30-40): (10-20): (100-120): (0.6-0.8).
4. The high-performance PET composite material and the preparation method thereof according to claim 2, wherein the nano CeO in the step (3)2The mass ratio of the silane coupling agent KH-540 to the ethanol is (20-30): (2-6): (140-180).
5. The high-performance PET composite material and the preparation method thereof as claimed in claim 2, wherein the PPTA fiber in the step (5) is grafted with 2-butenoic acid, CeO2-g-KH540, tetrahydrofuran, catalyst 4-dimethylaminopyridine in a mass ratio of (30-40): (20-30): (80-100): (0.6-0.8).
6. The high performance PET composite material and the preparation method thereof according to claim 1, wherein the antioxidant is one or more of tris (2, 4-di-tert-butyl) phenyl phosphite, pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] or 1, 3, 5-trimethyl-2, 4, 6- (3, 5-di-tert-butyl-4-hydroxybenzyl) benzene.
7. The preparation method of the high-performance PET composite material is characterized by comprising the following steps:
(1) weighing 80-100 parts of PET and 16-20 parts of CeO2Mixing and uniformly stirring the @ PPTA fiber and 0.1-0.5 part of antioxidant to obtain a mixture;
(2) and (2) extruding and granulating the mixture obtained in the step (1) from an extruder to obtain the high-performance PET composite material.
8. The method for preparing a high-performance PET composite material according to claim 7, wherein the step (2) is specifically as follows:
and (2) putting the mixture obtained in the step (1) into a hopper of a double-screw extruder to extrude and granulate, so as to obtain the PET composite material, wherein the double-screw extruder comprises six temperature zones which are sequentially arranged, the temperature of the first zone is 240-260 ℃, the temperature of the second zone is 280-300 ℃, the temperature of the third zone is 280-300 ℃, the temperature of the fourth zone is 280-300 ℃, the temperature of the fifth zone is 280-300 ℃, the temperature of the sixth zone is 280-300 ℃, the temperature of a machine head is 280-300 ℃, and the rotation speed of a screw is 200-280 r/min.
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