CN114031938B - High-temperature nylon and preparation method thereof - Google Patents
High-temperature nylon and preparation method thereof Download PDFInfo
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- CN114031938B CN114031938B CN202111367583.8A CN202111367583A CN114031938B CN 114031938 B CN114031938 B CN 114031938B CN 202111367583 A CN202111367583 A CN 202111367583A CN 114031938 B CN114031938 B CN 114031938B
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- 239000004677 Nylon Substances 0.000 title claims abstract description 78
- 229920001778 nylon Polymers 0.000 title claims abstract description 78
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 199
- 239000002073 nanorod Substances 0.000 claims abstract description 104
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 93
- 150000001875 compounds Chemical class 0.000 claims abstract description 42
- 229920001971 elastomer Polymers 0.000 claims abstract description 30
- 239000000806 elastomer Substances 0.000 claims abstract description 30
- 229920006111 poly(hexamethylene terephthalamide) Polymers 0.000 claims abstract description 26
- 239000002994 raw material 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
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 71
- 238000001035 drying Methods 0.000 claims description 48
- 238000005406 washing Methods 0.000 claims description 28
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 26
- 235000012239 silicon dioxide Nutrition 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000001125 extrusion Methods 0.000 claims description 13
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 13
- OKOBUGCCXMIKDM-UHFFFAOYSA-N Irganox 1098 Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)NCCCCCCNC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 OKOBUGCCXMIKDM-UHFFFAOYSA-N 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 8
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 8
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 8
- DZGCGKFAPXFTNM-UHFFFAOYSA-N ethanol;hydron;chloride Chemical compound Cl.CCO DZGCGKFAPXFTNM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- WTJKGGKOPKCXLL-RRHRGVEJSA-N phosphatidylcholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCCC=CCCCCCCCC WTJKGGKOPKCXLL-RRHRGVEJSA-N 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- ROFVEXUMMXZLPA-UHFFFAOYSA-N Bipyridyl Chemical compound N1=CC=CC=C1C1=CC=CC=N1 ROFVEXUMMXZLPA-UHFFFAOYSA-N 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 238000005469 granulation Methods 0.000 claims description 7
- 230000003179 granulation Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- OETHQSJEHLVLGH-UHFFFAOYSA-N metformin hydrochloride Chemical compound Cl.CN(C)C(=N)N=C(N)N OETHQSJEHLVLGH-UHFFFAOYSA-N 0.000 claims description 7
- 229960004329 metformin hydrochloride Drugs 0.000 claims description 7
- XZWYZXLIPXDOLR-UHFFFAOYSA-N metformin hydrochloride Natural products CN(C)C(=N)NC(N)=N XZWYZXLIPXDOLR-UHFFFAOYSA-N 0.000 claims description 7
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- GAODDBNJCKQQDY-UHFFFAOYSA-N 2-methyl-4,6-bis(octylsulfanylmethyl)phenol Chemical compound CCCCCCCCSCC1=CC(C)=C(O)C(CSCCCCCCCC)=C1 GAODDBNJCKQQDY-UHFFFAOYSA-N 0.000 claims description 2
- 229920002943 EPDM rubber Polymers 0.000 claims description 2
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical class C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 claims description 2
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 26
- 230000032683 aging Effects 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 230000004048 modification Effects 0.000 abstract description 6
- 238000012986 modification Methods 0.000 abstract description 6
- 239000011159 matrix material Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 230000014759 maintenance of location Effects 0.000 description 10
- 238000004132 cross linking Methods 0.000 description 9
- MPTQRFCYZCXJFQ-UHFFFAOYSA-L copper(II) chloride dihydrate Chemical compound O.O.[Cl-].[Cl-].[Cu+2] MPTQRFCYZCXJFQ-UHFFFAOYSA-L 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 8
- VZJJZMXEQNFTLL-UHFFFAOYSA-N chloro hypochlorite;zirconium;octahydrate Chemical compound O.O.O.O.O.O.O.O.[Zr].ClOCl VZJJZMXEQNFTLL-UHFFFAOYSA-N 0.000 description 7
- 239000002539 nanocarrier Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 230000035484 reaction time Effects 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- -1 PA T Polymers 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 229920006012 semi-aromatic polyamide Polymers 0.000 description 3
- 125000003396 thiol group Chemical group [H]S* 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- 229920003231 aliphatic polyamide Polymers 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000003486 chemical etching Methods 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003000 extruded plastic Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000002991 molded plastic Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920006115 poly(dodecamethylene terephthalamide) Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000002444 silanisation Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 239000004953 Aliphatic polyamide Substances 0.000 description 1
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 229920000147 Styrene maleic anhydride Polymers 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 125000000879 imine group Chemical group 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920006128 poly(nonamethylene terephthalamide) Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000009423 ventilation 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
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- 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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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 the technical field of nylon preparation, and particularly discloses high-temperature nylon and a preparation method thereof. The high-temperature nylon consists of the following raw materials in parts by weight: 35-50 parts of nylon 6T, 35-50 parts of nylon 12T, 10-20 parts of elastomer, 0.5-1.5 parts of antioxidant and 3-8 parts of functionalized mesoporous silica nanorod. According to the invention, the functional compound is loaded on the mesoporous silica nanorod and then is subjected to blending modification with nylon, so that the process is simple, the effect is obvious, and the prepared high-temperature nylon has both thermo-oxidative aging resistance and chemical resistance and has good market prospect.
Description
Technical Field
The invention relates to the technical field of nylon preparation, in particular to high-temperature nylon and a preparation method thereof.
Background
Polyamide is commonly called nylon, which is a general term of high polymers containing amide groups in the repeat structure of the main chain of the macromolecule and capable of forming a certain hydrogen bond density. Among plastic applications, engineering plastics having the greatest amount of use and the greatest application have been developed because of their excellent physical and mechanical properties, electrical insulation properties, oil resistance, abrasion resistance, solvent resistance, corrosion resistance, self-lubricity, and the like. Polyamides can be classified into aliphatic polyamides, wholly aromatic polyamides and semiaromatic polyamides according to monomer composition. The semi-aromatic polyamide is a polyamide prepared by polycondensation of raw material diacid or diamine monomer containing aromatic ring under certain reaction condition, and has excellent thermal performance, rigidity, chemical resistance, dimensional stability and good processability, and the main product of the semi-aromatic polyamide has PA6T, PA9T, PA T, PA12T and the like, and is widely applied to the fields of automobiles, packaging industry, sports equipment, electronics industry, aviation and the like at present.
Chinese patent 201410789880.5 discloses a high-fluidity high-temperature nylon and a preparation method thereof, wherein the nylon is prepared by copolymerizing 30-85 wt% of high-temperature nylon salt, 10-50 wt% of aliphatic nylon salt, 1-15 wt% of polyamine, 0.4-20 wt% of auxiliary agent and 1-25 wt% of water, and the auxiliary agent comprises 0.1-5 wt% of heat stabilizer, 0.1-5 wt% of antioxidant, 0.1-5 wt% of end capping agent and 0.1-5 wt% of catalyst. The application adopts copolymerization to modify high-temperature nylon, belongs to chemical modification, and the prepared modified nylon has more stable performance than modified nylon obtained by physical modification. However, the high-temperature nylon has single performance and is difficult to meet diversified market demands, so that research on the high-temperature nylon with excellent comprehensive performance has important significance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides high-temperature nylon and a preparation method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
the high-temperature nylon consists of the following raw materials: nylon 6T, nylon 12T, an elastomer, an antioxidant and a functionalized mesoporous silica nanorod.
The high-temperature nylon consists of the following raw materials in parts by weight: 35-50 parts of nylon 6T, 35-50 parts of nylon 12T, 10-20 parts of elastomer, 0.5-1.5 parts of antioxidant and 3-8 parts of functionalized mesoporous silica nanorod.
The elastomer is any one of maleic anhydride grafted ethylene-octene copolymer, maleic anhydride grafted hydrogenated styrene-butadiene-styrene triblock copolymer and maleic anhydride grafted ethylene propylene diene monomer.
The antioxidant is any one of an antioxidant 1098, an antioxidant KY2468 and an antioxidant 1520.
The nano silicon dioxide has volume effect and quantum tunneling effect, is easy to generate penetration effect, can penetrate into the vicinity of two bonds of a high polymer compound, and overlaps with electron cloud of the high polymer compound to form a space reticular structure, so that the mechanical strength, toughness, wear resistance, ageing resistance, ultraviolet resistance and other performances of the high polymer material are greatly improved. The mesoporous silica nanorod with the pore structure has the advantages of adjustable pore diameter, controllable morphology, ordered pore channels, large specific surface area, easy modification and the like, and is often used as an excellent nano carrier for adsorbing and continuously releasing active molecules.
The preparation method of the functionalized mesoporous silica nanorod comprises the following steps:
s1, adding 3-5 parts by weight of hexadecyl trimethyl ammonium bromide into 20-30 parts by weight of water, adding 0.3-0.5 part by weight of phosphatidylcholine after ultrasonic dispersion is uniform, stirring for 20-40min at room temperature at a rotating speed of 1000-1500rpm, then adding 20-30 parts by weight of 20-30wt% ammonia water, continuously stirring for 1-3h, then adding 10-20 parts by weight of tetraethyl orthosilicate, continuously stirring for 3-5h, centrifuging, washing and drying after the completion of the stirring, thus obtaining the silicon dioxide nanorod;
s2, adding all the silica nanorods obtained in the step S1 into 40-60 parts by weight of 10-15% hydrochloric acid ethanol solution, stirring at the temperature of 70-80 ℃ at the rotation speed of 400-800rpm for reaction for 8-16 hours, centrifuging after finishing, washing, and drying to obtain the mesoporous silica nanorods;
and S3, adding 4-6 parts by weight of functional compound into 15-30 parts by weight of acetone, stirring at the room temperature at the rotation speed of 1200-1800rpm for 20-40min, then adding all the mesoporous silica nanorods obtained in the step S2, continuously stirring for 12-24h, centrifuging after the completion, washing and drying to obtain the functionalized mesoporous silica nanorods.
Further, the preparation method of the functionalized mesoporous silica nanorods comprises the following steps:
s1, adding 3-5 parts by weight of hexadecyl trimethyl ammonium bromide into 20-30 parts by weight of water, adding 0.3-0.5 part by weight of phosphatidylcholine after ultrasonic dispersion is uniform, stirring for 20-40min at room temperature at a rotating speed of 1000-1500rpm, then adding 20-30 parts by weight of 20-30wt% ammonia water, continuously stirring for 1-3h, then adding 10-20 parts by weight of tetraethyl orthosilicate, continuously stirring for 3-5h, centrifuging, washing and drying after the completion of the stirring, thus obtaining the silicon dioxide nanorod;
s2, adding 6-10 parts by weight of (3-mercaptopropyl) trimethoxysilane into 250-310 parts by weight of absolute ethyl alcohol, stirring at the room temperature at the rotation speed of 1000-1500rpm for 10-20min, then adding all the silica nanorods obtained in the step S1, stirring at the temperature of 65-75 ℃ at the rotation speed of 300-600rpm for reaction for 8-15h, centrifuging after the completion, washing and drying to obtain modified silica nanorods;
s3, adding all the modified silica nanorods obtained in the step S2 into 40-60 parts by weight of 10-15% ethanol hydrochloride solution, stirring at the temperature of 70-80 ℃ at the rotation speed of 400-800rpm for reaction for 8-16 hours, centrifuging after finishing, washing, and drying to obtain the modified mesoporous silica nanorods;
and S4, adding 4-6 parts by weight of functional compound into 15-30 parts by weight of acetone, stirring at the room temperature at the rotation speed of 1200-1800rpm for 20-40min, then adding all the modified mesoporous silica nanorods obtained in the step S3, continuing stirring for 12-24h, centrifuging after the completion, washing, and drying to obtain the functionalized mesoporous silica nanorods.
The invention adopts (3-mercaptopropyl) trimethoxy silane to modify the silicon dioxide nano rod, and the methoxy group in the silane coupling agent and the silicon hydroxyl hydrogen on the surface of the silicon dioxide nano rod undergo elimination reaction to form a firm chemical bond, so that the mercapto functional group is connected on the surface of the silicon dioxide nano rod in a chemical bonding mode, and an active center is provided for the combination of functional compounds; meanwhile, along with the elimination of silicon hydroxyl on the surface of the silicon dioxide nano rod, the interface compatibility between the nano carrier and the high polymer matrix is also improved, so that the dispersibility of the silicon dioxide nano rod in the matrix is improved.
The preparation method of the functional compound comprises the following steps: adding 1-3 parts by weight of metformin hydrochloride and 1-3 parts by weight of 2, 2-bipyridine into 50-80 parts by weight of acetone, stirring for 15-30min at a rotating speed of 600-1000rpm, adding 3-8 parts by weight of metal salt, continuously stirring for 8-15min, heating and refluxing for 1-3h at 40-55 ℃, centrifuging the obtained mixed solution, taking the bottom precipitate, and drying to obtain the functional compound.
The metal salt is a mixture of copper chloride dihydrate and zirconium oxychloride octahydrate, wherein the mass ratio of the copper chloride dihydrate to the zirconium oxychloride octahydrate is 1 (1-3).
According to the invention, metformin hydrochloride and 2, 2-bipyridine are used as bidentate ligands, and are respectively used as coordination sites to coordinate with metal ions through two nitrogen atoms and pyridine ring groups of imine groups to form a functional compound, and the functional compound can increase the density of chemical bonds and form an excellent protective barrier through chemical interaction and binding affinity between a molecular active part and a nano-carrier-modified mesoporous silica nano-rod, so that a compact crosslinked network is formed between polymer matrixes, and the nylon performance is improved.
The invention adopts the copper chloride dihydrate and the zirconium oxychloride octahydrate to be compounded as metal salts, and the reason is that the compound formed by zirconium ions with high-atomic-weight octahedral structure has higher chemical reactivity, and the combination effect between the functional compound and the modified mesoporous silica nanorod is enhanced, so that the crosslinking strength is improved; the compound formed by the copper ions with the high-efficiency dipole moment and the distorted octahedral structure has high electron affinity, occupies part of mesoporous channels of the silica nanorods, increases the chemical bond density, reduces free volume crosslinking and induces the crosslinking strength in the matrix; the two components are synergistic, so that the crosslinking strength of the matrix is improved together, and the chemical resistance of the nylon is improved. In addition, according to the classical Mark triangle principle of macromolecule aging, the introduction of a cross-linking structure can improve the aging resistance of the system.
The preparation method of the high-temperature nylon comprises the following steps:
drying nylon 6T, nylon 12T and an elastomer in a blast drying oven at 75-85 ℃ for 8-15h according to a formula, adding the nylon 6T, the nylon 12T, the elastomer, an antioxidant and the functionalized mesoporous silica nanorod into an internal mixer for banburying, and discharging the banburying materials into a screw extruder, and carrying out melt blending extrusion granulation to obtain the high-temperature nylon.
The banburying temperature of the banburying machine is 295-315 ℃, and the banburying reaction time is 8-12min.
The extrusion process conditions of the screw extruder are that the first zone 275-285 ℃, the second zone 295-305 ℃, the third zone 315-325 ℃, the fourth zone 315-325 ℃, and the fifth zone 315-325 ℃, and the screw rotating speed is 40-50r/min.
The invention has the following advantages:
1. according to the invention, the mesoporous silica nanorods are used as nano carriers, and then the functional compounds are loaded on the mesoporous silica nanorods, so that not only is migration of functional compound molecules in a matrix effectively restricted, but also continuous release of effective active molecules in the functional compounds is realized.
2. In the preparation method, when mesoporous silica nanorods are prepared, silanization modification is carried out on the silica nanorods, on one hand, methoxy groups in a coupling agent and silicon hydroxyl hydrogen on the surfaces of the silica nanorods are utilized to carry out elimination reaction to form firm chemical bonds, so that mercapto functional groups are connected to the surfaces of the silica nanorods in a chemical bonding mode, and an effective reactive center is provided for the combination of functional compounds; on the other hand, the silicon hydroxyl content of the surface of the silicon dioxide nano rod is improved, and the interface compatibility between the nano carrier and the high polymer matrix is also improved, so that the dispersibility of the carrier in the matrix is improved, and the performance is promoted.
3. The functional compound prepared by complexing the coordination sites of the bidentate ligand and the metal ions is adopted in the functionalized modification of the mesoporous silica nanorod, the density of chemical bonds is increased and an excellent protective barrier is formed through the chemical interaction and the binding affinity between the molecular active part and the nano carrier-modified mesoporous silica nanorod, and a compact crosslinked network is formed between high polymer matrixes, so that the chemical resistance and ageing resistance of nylon are improved.
4. According to the invention, the functional compound is loaded on the mesoporous silica nanorod to prepare the functionalized mesoporous silica nanorod, and then the functionalized mesoporous silica nanorod is blended and modified with nylon, so that the process is simple, the effect is obvious, and the prepared high-temperature nylon has the heat-oxygen aging resistance and chemical resistance and has good market prospect.
Detailed Description
The above summary of the present invention is described in further detail below in conjunction with the detailed description, but it should not be understood that the scope of the above-described subject matter of the present invention is limited to the following examples.
Introduction of some of the raw materials in this application:
nylon 6T, abbreviated as PA6T, model: C430N, supplied by the mitsunobu chemical company of japan.
Nylon 12T, abbreviated as PA12T, model: NC010, available from DuPont, U.S.A.
Maleic anhydride grafted ethylene-octene copolymer, brand: GR216, grafted maleic anhydride content: 0.5-1%, tensile strength at break: 9MPa, elongation at break: 1000, supplied by the united states dow company.
Example 1
The high-temperature nylon consists of the following raw materials in parts by weight: 40 parts by weight of nylon 6T, 40 parts by weight of nylon 12T, 14 parts by weight of elastomer, 1 part by weight of antioxidant 1098 and 5 parts by weight of mesoporous silica nanorod.
The elastomer is a maleic anhydride grafted ethylene-octene copolymer.
The preparation method of the mesoporous silica nanorod comprises the following steps:
s1, adding 3.5 parts by weight of cetyl trimethyl ammonium bromide into 25 parts by weight of water, uniformly dispersing by ultrasonic, adding 0.4 part by weight of phosphatidylcholine, stirring at room temperature at a rotation speed of 1200rpm for 30min, then adding 25 parts by weight of 25wt% ammonia water, continuously stirring for 2h, then adding 15 parts by weight of tetraethyl orthosilicate, continuously stirring for 4h, centrifuging, washing, and drying to obtain a silicon dioxide nano rod;
s2, adding all the silica nanorods obtained in the step S1 into 50 parts by weight of 13% ethanol hydrochloride solution, stirring at the temperature of 75 ℃ at the rotation speed of 500rpm for reaction for 12 hours, centrifuging after finishing, washing, and drying to obtain the mesoporous silica nanorods.
The preparation method of the high-temperature nylon comprises the following steps:
and drying nylon 6T, nylon 12T and an elastomer in an air blast drying oven at 80 ℃ for 12 hours according to a formula, adding the nylon 6T, the nylon 12T, the elastomer, an antioxidant 1098 and a mesoporous silica nano rod into an internal mixer for banburying, and discharging the banburying materials into a screw extruder, and carrying out melt blending extrusion granulation to obtain the high-temperature nylon.
The banburying temperature of the banburying machine is 305 ℃, and the banburying reaction time is 10min.
The extrusion process conditions of the screw extruder are 280 ℃ in the first area, 300 ℃ in the second area, 320 ℃ in the third area, 320 ℃ in the fourth area, 320 ℃ in the fifth area and 46r/min of screw rotation speed.
Example 2
The high-temperature nylon consists of the following raw materials in parts by weight: 40 parts by weight of nylon 6T, 40 parts by weight of nylon 12T, 14 parts by weight of elastomer, 1 part by weight of antioxidant 1098 and 5 parts by weight of functionalized mesoporous silica nanorod.
The elastomer is a maleic anhydride grafted ethylene-octene copolymer.
The preparation method of the functionalized mesoporous silica nanorod comprises the following steps:
s1, adding 3.5 parts by weight of cetyl trimethyl ammonium bromide into 25 parts by weight of water, uniformly dispersing by ultrasonic, adding 0.4 part by weight of phosphatidylcholine, stirring at room temperature at a rotation speed of 1200rpm for 30min, then adding 25 parts by weight of 25wt% ammonia water, continuously stirring for 2h, then adding 15 parts by weight of tetraethyl orthosilicate, continuously stirring for 4h, centrifuging, washing, and drying to obtain a silicon dioxide nano rod;
s2, adding all the modified silicon dioxide nano rods obtained in the step S1 into 50 parts by weight of 13% hydrochloric acid ethanol solution, stirring at the temperature of 75 ℃ at the rotation speed of 500rpm for reaction for 12 hours, centrifuging after the reaction, washing, and drying to obtain mesoporous silicon dioxide nano rods;
and S3, adding 5 parts by weight of functional compound into 20 parts by weight of acetone, stirring at 1500rpm for 30min at room temperature, then adding all the mesoporous silica nanorods obtained in the step S2, continuing stirring for 18h, centrifuging after the completion, washing, and drying to obtain the functionalized mesoporous silica nanorods.
The preparation method of the functional compound comprises the following steps: adding 2 parts by weight of metformin hydrochloride and 1.6 parts by weight of 2, 2-bipyridine into 70 parts by weight of acetone, stirring for 20min at a speed of 800rpm, adding 5 parts by weight of copper chloride dihydrate, continuously stirring for 10min, heating and refluxing for 2h at 50 ℃, centrifuging the obtained mixed solution, taking a bottom precipitate, and drying to obtain the functional compound.
The preparation method of the high-temperature nylon comprises the following steps:
and drying nylon 6T, nylon 12T and an elastomer in an air blast drying oven at 80 ℃ for 12 hours according to a formula, adding the nylon 6T, the nylon 12T, the elastomer, an antioxidant 1098 and the functionalized mesoporous silica nanorod into an internal mixer for banburying, and discharging the banburying materials into a screw extruder, and carrying out melt blending extrusion granulation to obtain the high-temperature nylon.
The banburying temperature of the banburying machine is 305 ℃, and the banburying reaction time is 10min.
The extrusion process conditions of the screw extruder are 280 ℃ in the first area, 300 ℃ in the second area, 320 ℃ in the third area, 320 ℃ in the fourth area, 320 ℃ in the fifth area and 46r/min of screw rotation speed.
Example 3
The high-temperature nylon consists of the following raw materials in parts by weight: 40 parts by weight of nylon 6T, 40 parts by weight of nylon 12T, 14 parts by weight of elastomer, 1 part by weight of antioxidant 1098 and 5 parts by weight of functionalized mesoporous silica nanorod.
The elastomer is a maleic anhydride grafted ethylene-octene copolymer.
The preparation method of the functionalized mesoporous silica nanorod comprises the following steps:
s1, adding 3.5 parts by weight of cetyl trimethyl ammonium bromide into 25 parts by weight of water, uniformly dispersing by ultrasonic, adding 0.4 part by weight of phosphatidylcholine, stirring at room temperature at a rotation speed of 1200rpm for 30min, then adding 25 parts by weight of 25wt% ammonia water, continuously stirring for 2h, then adding 15 parts by weight of tetraethyl orthosilicate, continuously stirring for 4h, centrifuging, washing, and drying to obtain a silicon dioxide nano rod;
s2, adding 7.5 parts by weight of (3-mercaptopropyl) trimethoxysilane into 300 parts by weight of absolute ethyl alcohol, stirring at room temperature for 15min at a rotation speed of 1200rpm, adding all the silica nanorods obtained in the step S1, stirring at a temperature of 70 ℃ at a rotation speed of 500rpm for reaction for 12h, centrifuging after the completion, washing, and drying to obtain modified silica nanorods;
s3, adding all the modified silicon dioxide nano rods obtained in the step S2 into 50 parts by weight of hydrochloric acid ethanol solution with the volume fraction of 13%, stirring at the temperature of 75 ℃ at the rotation speed of 500rpm for reaction for 12 hours, centrifuging after the reaction, washing, and drying to obtain the modified mesoporous silicon dioxide nano rods;
and S4, adding 5 parts by weight of functional compound into 20 parts by weight of acetone, stirring at 1500rpm for 30min at room temperature, then adding all the modified mesoporous silica nanorods obtained in the step S3, continuing stirring for 18h, centrifuging after the completion, washing, and drying to obtain the functionalized mesoporous silica nanorods.
The preparation method of the functional compound comprises the following steps: adding 2 parts by weight of metformin hydrochloride and 1.6 parts by weight of 2, 2-bipyridine into 70 parts by weight of acetone, stirring for 20min at a speed of 800rpm, adding 5 parts by weight of copper chloride dihydrate, continuously stirring for 10min, heating and refluxing for 2h at 50 ℃, centrifuging the obtained mixed solution, taking a bottom precipitate, and drying to obtain the functional compound.
The preparation method of the high-temperature nylon comprises the following steps:
and drying nylon 6T, nylon 12T and an elastomer in an air blast drying oven at 80 ℃ for 12 hours according to a formula, adding the nylon 6T, the nylon 12T, the elastomer, an antioxidant 1098 and the functionalized mesoporous silica nanorod into an internal mixer for banburying, and discharging the banburying materials into a screw extruder, and carrying out melt blending extrusion granulation to obtain the high-temperature nylon.
The banburying temperature of the banburying machine is 305 ℃, and the banburying reaction time is 10min.
The extrusion process conditions of the screw extruder are 280 ℃ in the first area, 300 ℃ in the second area, 320 ℃ in the third area, 320 ℃ in the fourth area, 320 ℃ in the fifth area and 46r/min of screw rotation speed.
Example 4
The high-temperature nylon consists of the following raw materials in parts by weight: 40 parts by weight of nylon 6T, 40 parts by weight of nylon 12T, 14 parts by weight of elastomer, 1 part by weight of antioxidant 1098 and 5 parts by weight of functionalized mesoporous silica nanorod.
The elastomer is a maleic anhydride grafted ethylene-octene copolymer.
The preparation method of the functionalized mesoporous silica nanorod comprises the following steps:
s1, adding 3.5 parts by weight of cetyl trimethyl ammonium bromide into 25 parts by weight of water, uniformly dispersing by ultrasonic, adding 0.4 part by weight of phosphatidylcholine, stirring at room temperature at a rotation speed of 1200rpm for 30min, then adding 25 parts by weight of 25wt% ammonia water, continuously stirring for 2h, then adding 15 parts by weight of tetraethyl orthosilicate, continuously stirring for 4h, centrifuging, washing, and drying to obtain a silicon dioxide nano rod;
s2, adding 7.5 parts by weight of (3-mercaptopropyl) trimethoxysilane into 300 parts by weight of absolute ethyl alcohol, stirring at room temperature for 15min at a rotation speed of 1200rpm, adding all the silica nanorods obtained in the step S1, stirring at a temperature of 70 ℃ at a rotation speed of 500rpm for reaction for 12h, centrifuging after the completion, washing, and drying to obtain modified silica nanorods;
s3, adding all the modified silicon dioxide nano rods obtained in the step S2 into 50 parts by weight of hydrochloric acid ethanol solution with the volume fraction of 13%, stirring at the temperature of 75 ℃ at the rotation speed of 500rpm for reaction for 12 hours, centrifuging after the reaction, washing, and drying to obtain the modified mesoporous silicon dioxide nano rods;
and S4, adding 5 parts by weight of functional compound into 20 parts by weight of acetone, stirring at 1500rpm for 30min at room temperature, then adding all the modified mesoporous silica nanorods obtained in the step S3, continuing stirring for 18h, centrifuging after the completion, washing, and drying to obtain the functionalized mesoporous silica nanorods.
The preparation method of the functional compound comprises the following steps: adding 2 parts by weight of metformin hydrochloride and 1.6 parts by weight of 2, 2-bipyridine into 70 parts by weight of acetone, stirring for 20min at a speed of 800rpm, adding 5 parts by weight of zirconium oxychloride octahydrate, continuously stirring for 10min, heating and refluxing for 2h at 50 ℃, centrifuging the obtained mixed solution, taking the bottom precipitate, and drying to obtain the functional compound.
The preparation method of the high-temperature nylon comprises the following steps:
and drying nylon 6T, nylon 12T and an elastomer in an air blast drying oven at 80 ℃ for 12 hours according to a formula, adding the nylon 6T, the nylon 12T, the elastomer, an antioxidant 1098 and the functionalized mesoporous silica nanorod into an internal mixer for banburying, and discharging the banburying materials into a screw extruder, and carrying out melt blending extrusion granulation to obtain the high-temperature nylon.
The banburying temperature of the banburying machine is 305 ℃, and the banburying reaction time is 10min.
The extrusion process conditions of the screw extruder are 280 ℃ in the first area, 300 ℃ in the second area, 320 ℃ in the third area, 320 ℃ in the fourth area, 320 ℃ in the fifth area and 46r/min of screw rotation speed.
Example 5
The high-temperature nylon consists of the following raw materials in parts by weight: 40 parts by weight of nylon 6T, 40 parts by weight of nylon 12T, 14 parts by weight of elastomer, 1 part by weight of antioxidant 1098 and 5 parts by weight of functionalized mesoporous silica nanorod.
The elastomer is a maleic anhydride grafted ethylene-octene copolymer.
The preparation method of the functionalized mesoporous silica nanorod comprises the following steps:
s1, adding 3.5 parts by weight of cetyl trimethyl ammonium bromide into 25 parts by weight of water, uniformly dispersing by ultrasonic, adding 0.4 part by weight of phosphatidylcholine, stirring at room temperature at a rotation speed of 1200rpm for 30min, then adding 25 parts by weight of 25wt% ammonia water, continuously stirring for 2h, then adding 15 parts by weight of tetraethyl orthosilicate, continuously stirring for 4h, centrifuging, washing, and drying to obtain a silicon dioxide nano rod;
s2, adding 7.5 parts by weight of (3-mercaptopropyl) trimethoxysilane into 300 parts by weight of absolute ethyl alcohol, stirring at room temperature for 15min at a rotation speed of 1200rpm, adding all the silica nanorods obtained in the step S1, stirring at a temperature of 70 ℃ at a rotation speed of 500rpm for reaction for 12h, centrifuging after the completion, washing, and drying to obtain modified silica nanorods;
s3, adding all the modified silicon dioxide nano rods obtained in the step S2 into 50 parts by weight of hydrochloric acid ethanol solution with the volume fraction of 13%, stirring at the temperature of 75 ℃ at the rotation speed of 500rpm for reaction for 12 hours, centrifuging after the reaction, washing, and drying to obtain the modified mesoporous silicon dioxide nano rods;
and S4, adding 5 parts by weight of functional compound into 20 parts by weight of acetone, stirring at 1500rpm for 30min at room temperature, then adding all the modified mesoporous silica nanorods obtained in the step S3, continuing stirring for 18h, centrifuging after the completion, washing, and drying to obtain the functionalized mesoporous silica nanorods.
The preparation method of the functional compound comprises the following steps: adding 2 parts by weight of metformin hydrochloride and 1.6 parts by weight of 2, 2-bipyridine into 70 parts by weight of acetone, stirring for 20min at a speed of 800rpm, adding 5 parts by weight of metal salt, continuously stirring for 10min, heating and refluxing for 2h at 50 ℃, centrifuging the obtained mixed solution, taking the bottom precipitate, and drying to obtain the functional compound.
The metal salt is a mixture of copper chloride dihydrate and zirconium oxychloride octahydrate, wherein the mass ratio of the copper chloride dihydrate to the zirconium oxychloride octahydrate is 1:2.
The preparation method of the high-temperature nylon comprises the following steps:
and drying nylon 6T, nylon 12T and an elastomer in an air blast drying oven at 80 ℃ for 12 hours according to a formula, adding the nylon 6T, the nylon 12T, the elastomer, an antioxidant 1098 and the functionalized mesoporous silica nanorod into an internal mixer for banburying, and discharging the banburying materials into a screw extruder, and carrying out melt blending extrusion granulation to obtain the high-temperature nylon.
The banburying temperature of the banburying machine is 305 ℃, and the banburying reaction time is 10min.
The extrusion process conditions of the screw extruder are 280 ℃ in the first area, 300 ℃ in the second area, 320 ℃ in the third area, 320 ℃ in the fourth area, 320 ℃ in the fifth area and 46r/min of screw rotation speed.
Test example 1
Thermal oxidative aging resistance test: determination of Plastic tensile Properties according to national Standard GB/T1040.2-2006 section 2: test conditions for molded and extruded plastics the tensile properties of the test specimens before and after thermal oxidative aging were tested using a CMT-5104 universal tester. The high temperature nylon prepared in the examples was injection molded into 1BA type small specimens 75mm in overall length, 25mm in gauge length, 10mm in end width, 2mm in thickness, and 5mm in width in the middle parallel portion. Tensile test conditions: the stretching speed was 20mm/min. Thermal oxidative aging conditions: the test sample is put into a thermo-oxidative aging experiment box, the experiment temperature is set to 160 ℃, ventilation is carried out once every one minute, the rotating speed is 30r/min, and aging is carried out for 50 days. The test results were averaged over 5 samples of 5 samples per group. The thermal oxidative aging resistance of nylon is represented by the tensile strength retention, the greater the retention, the better the thermal oxidative aging resistance.
Tensile strength retention (%) =tensile strength of sample after aging/tensile strength of sample without aging×100%
TABLE 1 results of thermal oxidative aging resistance test
| Retention of tensile strength,% | |
| Example 1 | 71.7 |
| Example 2 | 81.9 |
| Example 3 | 88.3 |
| Example 4 | 88.1 |
| Example 5 | 92.4 |
The above results show that the thermo-oxidative aging resistance of example 2 is significantly improved compared with example 1, which is probably due to the fact that the mesoporous silica nanorods are used as the nano-carriers, and the functional compound is loaded on the mesoporous silica nanorods, so that migration of the functional compound molecules in the matrix can be effectively limited, continuous release of effective active molecules in the functional compound can be realized, and the thermo-oxidative aging resistance is promoted. The tensile strength retention of example 3 is significantly higher than that of example 2, probably because in example 3, when preparing a mesoporous silica nanorod, the silica nanorod is subjected to silanization modification, on the one hand, the methoxy group in the coupling agent and the silicon hydroxyl hydrogen on the surface of the silica nanorod are utilized to perform elimination reaction to form a firm chemical bond, so that the mercapto functional group is connected on the surface of the silica nanorod in a chemical bonding manner, and an effective reactive center is provided for the combination of functional compounds; on the other hand, the silicon hydroxyl content of the surface of the silicon dioxide nano rod is improved, and the interface compatibility between the nano carrier and the high polymer matrix is also improved, so that the dispersibility of the functionalized mesoporous silicon dioxide nano rod in the matrix is improved, and the performance is promoted.
Test example 2
Chemical resistance performance test: determination of Plastic tensile Properties according to national Standard GB/T1040.2-2006 section 2: test conditions for molded and extruded plastics tensile properties of the specimens before and after chemical etching were tested using a CMT-5104 universal tester. The high temperature nylon prepared in the examples was injection molded into 1BA type small specimens 75mm in overall length, 25mm in gauge length, 10mm in end width, 2mm in thickness, and 5mm in width in the middle parallel portion. Tensile test conditions: the stretching speed is 50mm/min, the temperature is 15 ℃, and the humidity is 10% RH. Chemical etching conditions: the test specimens were placed in beakers containing 1000mL of ethylene glycol, respectively, and after standing at 25℃for 7d, they were taken out, and the medium on the surfaces of the specimens was cleaned with gauze, and the tensile strength of the specimens was measured. The test results were averaged over 5 samples of 5 samples per group. The chemical resistance of nylon is expressed in terms of tensile strength retention, the greater the retention, the better the chemical resistance.
Tensile strength retention (%) =tensile strength after specimen corrosion/tensile strength without specimen corrosion×100%
Table 2 chemical resistance test results
| Retention of tensile strength,% | |
| Example 1 | 70.5 |
| Example 2 | 78.8 |
| Example 3 | 85.2 |
| Example 4 | 85.0 |
| Example 5 | 89.3 |
The result shows that the high-temperature nylon prepared by the technical scheme of the invention has good chemical corrosion resistance. In example 5, the tensile strength retention ratio of the metal salt in the functional compound prepared by adopting the copper chloride dihydrate and the zirconium oxychloride octahydrate is superior to that of example 3 or 4 using a single metal salt, probably because the compound formed by zirconium ions with a high-atomic weight octahedral structure has higher chemical reactivity, the bonding effect between the functional compound and the modified mesoporous silica nanorods is enhanced, and the crosslinking strength is improved; the compound formed by the copper ions with the high-efficiency dipole moment and the distorted octahedral structure has high electron affinity, occupies part of mesoporous channels of the silica nanorods, increases the chemical bond density, reduces free volume crosslinking and induces the crosslinking strength in the matrix; the two components are synergistic, so that the crosslinking strength of the matrix is improved together, and the chemical resistance of the nylon is improved.
Claims (4)
1. The high-temperature nylon is characterized by comprising the following raw materials in parts by weight: 35-50 parts by weight of nylon 6T, 35-50 parts by weight of nylon 12T, 10-20 parts by weight of elastomer, 0.5-1.5 parts by weight of antioxidant and 3-8 parts by weight of functionalized mesoporous silica nanorod;
the preparation method of the functionalized mesoporous silica nanorod comprises the following steps:
s1, adding 3-5 parts by weight of hexadecyl trimethyl ammonium bromide into 20-30 parts by weight of water, adding 0.3-0.5 part by weight of phosphatidylcholine after ultrasonic dispersion is uniform, stirring for 20-40min at room temperature at a rotating speed of 1000-1500rpm, then adding 20-30 parts by weight of 20-30wt% ammonia water, continuously stirring for 1-3h, then adding 10-20 parts by weight of tetraethyl orthosilicate, continuously stirring for 3-5h, centrifuging, washing and drying after the completion of the stirring, thus obtaining the silicon dioxide nanorod;
s2, adding 6-10 parts by weight of (3-mercaptopropyl) trimethoxysilane into 250-310 parts by weight of absolute ethyl alcohol, stirring at the room temperature at the rotation speed of 1000-1500rpm for 10-20min, then adding all the silica nanorods obtained in the step S1, stirring at the temperature of 65-75 ℃ at the rotation speed of 300-600rpm for reaction for 8-15h, centrifuging after the completion, washing and drying to obtain modified silica nanorods;
s3, adding all the modified silica nanorods obtained in the step S2 into 40-60 parts by weight of 10-15% ethanol hydrochloride solution, stirring at the temperature of 70-80 ℃ at the rotation speed of 400-800rpm for reaction for 8-16 hours, centrifuging after finishing, washing, and drying to obtain the modified mesoporous silica nanorods;
s4, adding 4-6 parts by weight of functional compound into 15-30 parts by weight of acetone, stirring at the room temperature at the rotation speed of 1200-1800rpm for 20-40min, then adding all the modified mesoporous silica nanorods obtained in the step S3, continuing stirring for 12-24h, centrifuging after the completion, washing, and drying to obtain the functionalized mesoporous silica nanorods;
the preparation method of the functional compound comprises the following steps: adding 1-3 parts by weight of metformin hydrochloride and 1-3 parts by weight of 2, 2-bipyridine into 50-80 parts by weight of acetone, stirring for 15-30min at a rotating speed of 600-1000rpm, adding 3-8 parts by weight of metal salt, continuously stirring for 8-15min, heating and refluxing for 1-3h at 40-55 ℃, centrifuging the obtained mixed solution, taking the bottom precipitate, and drying to obtain the functional compound.
2. The high temperature nylon of claim 1 wherein the elastomer is any one of a maleic anhydride grafted ethylene-octene copolymer, a maleic anhydride grafted hydrogenated styrene-butadiene-styrene triblock copolymer, and a maleic anhydride grafted ethylene propylene diene monomer.
3. The high temperature nylon of claim 1, wherein the antioxidant is any one of an antioxidant 1098 and an antioxidant 1520.
4. The method for preparing high temperature nylon as claimed in claim 1, comprising the steps of:
drying nylon 6T, nylon 12T and an elastomer in a blast drying oven at 75-85 ℃ for 8-15h according to a formula, adding the nylon 6T, the nylon 12T, the elastomer, an antioxidant and the functionalized mesoporous silica nanorod into an internal mixer for banburying, and discharging the banburying materials into a screw extruder, and carrying out melt blending extrusion granulation to obtain the high-temperature nylon.
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