CN115850928A - Antibacterial heat-conducting PBT (polybutylene terephthalate) composite material and preparation method thereof - Google Patents
Antibacterial heat-conducting PBT (polybutylene terephthalate) composite material and preparation method thereof Download PDFInfo
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Abstract
The invention provides an antibacterial heat-conducting PBT (polybutylene terephthalate) composite material and a preparation method thereof, which relate to the technical field of composite materials and are prepared from the following raw materials in parts by weight: 55-65 parts of PBT resin, 15-20 parts of probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer, 3-5 parts of coupling agent, 10-15 parts of carbon fiber, 2-4 parts of graphene oxide, 1-3 parts of nano zinc oxide, 3-6 parts of 4,4' -diacyl chloride diphenyl ether, 1-3 parts of anhydrous aluminum chloride, 0.6-0.8 part of antioxidant and 0.3-0.5 part of lubricant. The antibacterial heat-conducting PBT composite material disclosed by the invention has the advantages of good antibacterial property, obvious heat-conducting effect, sufficient toughness and mechanical properties, good aging resistance and long service life.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to an antibacterial heat-conducting PBT composite material and a preparation method thereof.
Background
Polybutylene terephthalate (PBT) is one of general engineering plastics with excellent comprehensive properties, has excellent mechanical properties, is easy to process, has heat resistance, chemical corrosion resistance and good weather resistance, and has excellent electrical insulating property, so that the PBT material can be applied to the fields of automobile industry, hardware machinery, electronic and electrical appliances and the like, and the application field is very wide. However, PBT has obvious defects, such as sensitivity to notch, low notch impact strength, large molding shrinkage, and insufficient antibacterial property and thermal conductivity, which become a great obstacle to the popularization and application of PBT.
In order to solve the above problems, chinese patent document CN114479368A discloses a heat conductive PBT composite material, which is prepared from the following components in parts by weight: 100 parts of PBT, 8-20 parts of aluminum oxide, 2-3 parts of nano silicon dioxide, 1-2 parts of coupling agent, 0.5-1 part of pentaerythritol and 0.5-1 part of antioxidant. The invention also discloses a preparation method of the heat-conducting PBT composite material, which comprises the following steps: spraying a coupling agent into the mixture of aluminum oxide and nano silicon dioxide under the stirring condition, and uniformly mixing to obtain a filling material; the PBT composite material is prepared by mixing the filling material, the PBT, the pentaerythritol and the antioxidant, adding the mixture into a double-screw extruder, and performing melt extrusion, granulation and drying. However, it has no antibacterial property, and its toughness, heat aging resistance and mechanical properties are yet to be further improved.
Therefore, the PBT composite material which has the advantages of good antibacterial property, obvious heat conduction effect, enough toughness and mechanical properties, good aging resistance and long service life and the preparation method thereof are still needed in the field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the PBT composite material which has the advantages of good antibacterial property, obvious heat conduction effect, sufficient toughness and mechanical property, good aging resistance and long service life and the preparation method thereof.
The invention can be realized by the following technical scheme:
the antibacterial heat-conducting PBT composite material is prepared from the following raw materials in parts by weight: 55-65 parts of PBT resin, 15-20 parts of probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer, 3-5 parts of coupling agent, 10-15 parts of carbon fiber, 2-4 parts of graphene oxide, 1-3 parts of nano zinc oxide, 3-6 parts of 4,4' -diacyl chloride diphenyl ether, 1-3 parts of anhydrous aluminum chloride, 0.6-0.8 part of antioxidant and 0.3-0.5 part of lubricant.
Preferably, the lubricant is at least one of paraffin and polydimethylsiloxane.
Preferably, the antioxidant is at least one of antioxidant 1010 and antioxidant 168.
Preferably, the particle size of the nano zinc oxide is 20-60nm.
Preferably, the graphene oxide is hexa-structured LG-1401 graphene oxide, and the particle size is 800-1200 meshes.
Preferably, the carbon fibers have an average diameter of 3 to 5 μm and a length of 1 to 3mm.
Preferably, the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH570.
Preferably, the preparation method of the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer comprises the following steps: adding probenazole, 1-vinylimidazole, N- (4-cyano-3-trifluoromethylphenyl) methacrylamide and an initiator into a high-boiling-point solvent, stirring and reacting for 3-5 hours at 60-80 ℃ in an inert gas atmosphere, then precipitating out in water, and drying the precipitated polymer in a vacuum drying oven at 85-95 ℃ to constant weight to obtain the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer.
Preferably, the mass ratio of the probenazole, the 1-vinyl imidazole, the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, the initiator and the high boiling point solvent is 1 (0.8-1.2) to (1-3) to (0.03-0.06) to (15-20).
Preferably, the initiator is azobisisobutyronitrile; the high boiling point solvent is at least one of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone; the inert gas is any one of nitrogen, helium and neon.
Preferably, the PBT resin is American Tycona 1700A high molecular weight PBT Celanex.
The invention also provides a preparation method of the antibacterial heat-conducting PBT composite material, which comprises the following steps: uniformly mixing the raw materials in parts by weight to obtain a mixed material, and then putting the mixed material into a double-screw extruder for extrusion molding to obtain the antibacterial heat-conducting PBT composite material.
Preferably, the extrusion molding process parameters are as follows: the temperature of each section of the double-screw extruder is 195-210 ℃, 215-225 ℃, 230-240 ℃, 245-255 ℃, 255-260 ℃ and 255-260 ℃ from the charging opening in sequence, the temperature of the extruder head is 250-260 ℃, and the rotating speed of the screw is 230-440 r/min.
Compared with the prior art, the invention has the beneficial effects that:
(1) The preparation method of the antibacterial heat-conducting PBT composite material disclosed by the invention is simple in process, convenient to operate, low in energy consumption, low in equipment dependence, high in yield of the prepared product, and capable of meeting the requirement of continuous large-scale production.
(2) The invention discloses an antibacterial heat-conducting PBT (polybutylene terephthalate) composite material which is prepared from the following raw materials in parts by weight: 55-65 parts of PBT resin, 15-20 parts of probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer, 3-5 parts of coupling agent, 10-15 parts of carbon fiber, 2-4 parts of graphene oxide, 1-3 parts of nano zinc oxide, 3-6 parts of 4,4' -diacyl chloride diphenyl ether, 1-3 parts of anhydrous aluminum chloride, 0.6-0.8 part of antioxidant and 0.3-0.5 part of lubricant. Through reasonable selection of raw material proportion and types, the raw materials can be better matched, and the product has the advantages of good antibacterial property, remarkable heat conduction effect, sufficient toughness and mechanical properties, good aging resistance and long service life.
(3) According to the antibacterial heat-conducting PBT composite material disclosed by the invention, the inorganic nano zinc oxide and the organic copolymer are compounded to serve as antibacterial active ingredients, so that the advantages of the inorganic nano zinc oxide and the organic copolymer can be combined, and the antibacterial broad spectrum property and the antibacterial durability are improved; the allylbenzothiazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer is prepared by allylbenzothiazole, 1-vinylimidazole and N- (4-cyano-3-trifluoromethylphenyl) methacrylamide through free radical copolymerization, propylbenzene thiazole, imidazolyl, cyano, trifluoromethylphenyl and acylamino are simultaneously introduced into the molecular structure of the composite material, and under the multiple actions of electronic effect, steric hindrance effect and conjugation effect, the prepared PBT composite material has obvious antibacterial effect, good heat-resistant aging performance and sufficient thermal conductivity, toughness and mechanical property.
(4) According to the antibacterial heat-conducting PBT composite material disclosed by the invention, benzene rings on the PBT resin and the probenazole/1-vinyl imidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer can chemically react with acyl chloride groups on 4,4' -diacyl chloride diphenyl ether under the catalytic action of anhydrous aluminum chloride to form an interpenetrating network structure, so that the heat resistance, aging resistance, heat conductivity, toughness and mechanical properties of the composite material can be effectively improved; the added carbon fiber and graphene oxide can play a role in reinforcement, and can only endow the material with excellent heat-conducting property.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following provides a detailed description of the product of the present invention with reference to the examples.
Example 1
The antibacterial heat-conducting PBT composite material is prepared from the following raw materials in parts by weight: 55 parts of PBT resin, 15 parts of probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer, 3 parts of coupling agent, 10 parts of carbon fiber, 2 parts of graphene oxide, 1 part of nano zinc oxide, 3 parts of 4,4' -diacyl chloride diphenyl ether, 1 part of anhydrous aluminum chloride, 0.6 part of antioxidant and 0.3 part of lubricant.
The lubricant is paraffin; the antioxidant is 1010; the particle size of the nano zinc oxide is 20nm; the graphene oxide is hexa-structured LG-1401 graphene oxide, and the particle size is 800 meshes; the carbon fiber has an average diameter of 3 μm and a length of 1mm; the coupling agent is a silane coupling agent KH550.
The preparation method of the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer comprises the following steps: adding probenazole, 1-vinyl imidazole, N- (4-cyano-3-trifluoromethylphenyl) methacrylamide and initiator into high boiling point solvent under inert gasStirring and reacting for 3 hours at 60 ℃ in an atmosphere, then precipitating in water, and drying the precipitated polymer in a vacuum drying oven at 85 ℃ to constant weight to obtain an allylbenzothiazole/1-vinyl imidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer; the mass ratio of the probenazole to the 1-vinyl imidazole to the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide to the initiator to the high boiling point solvent is 1; the initiator is azobisisobutyronitrile; the high boiling point solvent is dimethyl sulfoxide; the inert gas is nitrogen. The M of the copolymer was determined by GPC measurement n =19470g/mol，M W /M n =1.435; the mass ratio of the resulting units introduced in the copolymer by probenazole, 1-vinylimidazole, N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, respectively, calculated by elemental analysis and weight change, was 0.98.
The PBT resin is American Tycona 1700A high molecular weight PBT Celanex.
A preparation method of an antibacterial heat-conducting PBT composite material comprises the following steps: uniformly mixing the raw materials in parts by weight to obtain a mixed material, and then putting the mixed material into a double-screw extruder for extrusion molding to obtain the antibacterial heat-conducting PBT composite material; the extrusion molding process parameters are as follows: the temperature of each section of the double-screw extruder is 195 ℃, 215 ℃, 230 ℃, 245 ℃, 255 ℃ and 255 ℃ from the feed inlet, the head temperature of the extruder is 250 ℃, and the rotating speed of the screw is 230r/min.
Example 2
The antibacterial heat-conducting PBT composite material is prepared from the following raw materials in parts by weight: 58 parts of PBT resin, 17 parts of probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer, 3.5 parts of coupling agent, 12 parts of carbon fiber, 2.5 parts of graphene oxide, 1.5 parts of nano zinc oxide, 4 parts of 4,4' -diacyl chloride diphenyl ether, 1.5 parts of anhydrous aluminum chloride, 0.65 part of antioxidant and 0.35 part of lubricant.
The lubricant is polydimethylsiloxane; the antioxidant is antioxidant 168; the particle size of the nano zinc oxide is 30nm; the graphene oxide is hexa-structured LG-1401 graphene oxide, and the particle size is 900 meshes; the carbon fibers have an average diameter of 3.5 μm and a length of 1.5mm; the coupling agent is a silane coupling agent KH560.
The preparation method of the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer comprises the following steps: adding probenazole, 1-vinylimidazole, N- (4-cyano-3-trifluoromethylphenyl) methacrylamide and an initiator into a high-boiling-point solvent, stirring and reacting for 3.5 hours at 65 ℃ in an inert gas atmosphere, then precipitating in water, and drying the precipitated polymer in a vacuum drying oven at 87 ℃ to constant weight to obtain probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer; the mass ratio of the probenazole to the 1-vinyl imidazole to the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide to the initiator to the high boiling point solvent is 1.9; the initiator is azobisisobutyronitrile; the high boiling point solvent is N, N-dimethylformamide; the inert gas is helium.
The PBT resin is American Tycona 1700A high molecular weight PBT Celanex.
A preparation method of an antibacterial heat-conducting PBT composite material comprises the following steps: uniformly mixing the raw materials in parts by weight to obtain a mixed material, and then putting the mixed material into a double-screw extruder for extrusion molding to obtain the antibacterial heat-conducting PBT composite material; the extrusion molding process parameters are as follows: the temperature of each section of the double-screw extruder is 200 ℃, 218 ℃, 233 ℃, 248 ℃, 257 ℃ and 257 ℃ in sequence from a feed inlet, the head temperature of the extruder is 253 ℃, and the screw rotating speed is 280r/min.
Example 3
The antibacterial heat-conducting PBT composite material is prepared from the following raw materials in parts by weight: 55-65 parts of PBT resin, 18 parts of probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer, 4 parts of coupling agent, 13 parts of carbon fiber, 3 parts of graphene oxide, 2 parts of nano zinc oxide, 4.5 parts of 4,4' -diacyl chloride diphenyl ether, 2 parts of anhydrous aluminum chloride, 0.7 part of antioxidant and 0.4 part of lubricant.
The lubricant is paraffin; the antioxidant is antioxidant 168; the particle size of the nano zinc oxide is 40nm; the graphene oxide is hexa-structured LG-1401 graphene oxide, and the particle size is 1000 meshes; the average diameter of the carbon fiber is 4 mu m, and the length of the carbon fiber is 2mm; the coupling agent is a silane coupling agent KH570.
The preparation method of the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer comprises the following steps: adding probenazole, 1-vinylimidazole, N- (4-cyano-3-trifluoromethylphenyl) methacrylamide and an initiator into a high-boiling-point solvent, stirring and reacting for 4 hours at 70 ℃ in an inert gas atmosphere, then precipitating in water, and drying the precipitated polymer in a vacuum drying oven at 90 ℃ to constant weight to obtain a probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer; the mass ratio of the probenazole to the 1-vinyl imidazole to the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide to the initiator to the high boiling point solvent is 1; the initiator is azobisisobutyronitrile; the high boiling point solvent is N-methyl pyrrolidone; the inert gas is neon.
The PBT resin is American taconi 1700A high molecular weight PBT Celanex.
A preparation method of an antibacterial heat-conducting PBT composite material comprises the following steps: uniformly mixing the raw materials in parts by weight to obtain a mixed material, and then putting the mixed material into a double-screw extruder for extrusion molding to obtain the antibacterial heat-conducting PBT composite material; the extrusion molding process parameters are as follows: the temperature of each section of the double-screw extruder is 202 ℃, 220 ℃, 235 ℃, 250 ℃, 257 ℃ and 258 ℃ from a feed inlet in sequence, the head temperature of the extruder is 255 ℃, and the rotating speed of the screw is 380r/min.
Example 4
The antibacterial heat-conducting PBT composite material is prepared from the following raw materials in parts by weight: 63 parts of PBT resin, 19 parts of probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer, 4.5 parts of coupling agent, 14 parts of carbon fiber, 3.5 parts of graphene oxide, 2.5 parts of nano zinc oxide, 5.5 parts of 4,4' -diacyl chloride diphenyl ether, 2.5 parts of anhydrous aluminum chloride, 0.75 part of antioxidant and 0.45 part of lubricant.
The lubricant is a mixture formed by mixing paraffin and polydimethylsiloxane according to the mass ratio of 3; the antioxidant is a mixture formed by mixing an antioxidant 1010 and an antioxidant 168 according to a mass ratio of 1; the particle size of the nano zinc oxide is 50nm; the graphene oxide is hexa-structured LG-1401 graphene oxide, and the particle size is 1100 meshes; the carbon fibers have an average diameter of 4.5 μm and a length of 2.5mm; the coupling agent is a mixture formed by mixing a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH570 in a mass ratio of 1.
The preparation method of the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer comprises the following steps: adding probenazole, 1-vinylimidazole, N- (4-cyano-3-trifluoromethylphenyl) methacrylamide and an initiator into a high-boiling-point solvent, stirring and reacting for 4.5 hours at 75 ℃ in an inert gas atmosphere, then precipitating in water, and drying the precipitated polymer in a vacuum drying oven at 93 ℃ to constant weight to obtain probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer; the mass ratio of the probenazole to the 1-vinyl imidazole to the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide to the initiator to the high boiling point solvent is 1.1; the initiator is azobisisobutyronitrile; the high boiling point solvent is a mixture formed by mixing dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone according to a mass ratio of 1; the inert gas is nitrogen.
The PBT resin is American Tycona 1700A high molecular weight PBT Celanex.
A preparation method of an antibacterial heat-conducting PBT composite material comprises the following steps: uniformly mixing the raw materials in parts by weight to obtain a mixed material, and then putting the mixed material into a double-screw extruder for extrusion molding to obtain the antibacterial heat-conducting PBT composite material; the extrusion molding process parameters are as follows: the temperature of each section of the double-screw extruder is 208 ℃, 223 ℃, 238 ℃, 253 ℃, 258 ℃ and 258 ℃ from a feed inlet in sequence, the head temperature of the extruder is 257 ℃ and the screw rotating speed is 420r/min.
Example 5
The antibacterial heat-conducting PBT composite material is prepared from the following raw materials in parts by weight: 65 parts of PBT resin, 20 parts of probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer, 5 parts of coupling agent, 15 parts of carbon fiber, 4 parts of graphene oxide, 3 parts of nano zinc oxide, 6 parts of 4,4' -diacyl chloride diphenyl ether, 3 parts of anhydrous aluminum chloride, 0.8 part of antioxidant and 0.5 part of lubricant.
The lubricant is paraffin; the antioxidant is 1010; the particle size of the nano zinc oxide is 60nm; the graphene oxide is hexa-structured LG-1401 graphene oxide, and the particle size is 1200 meshes; the carbon fiber has an average diameter of 5 μm and a length of 3mm; the coupling agent is a silane coupling agent KH560.
The preparation method of the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer comprises the following steps: adding probenazole, 1-vinylimidazole, N- (4-cyano-3-trifluoromethylphenyl) methacrylamide and an initiator into a high-boiling-point solvent, stirring and reacting for 5 hours at 80 ℃ in an inert gas atmosphere, then precipitating in water, and drying the precipitated polymer in a vacuum drying oven at 95 ℃ to constant weight to obtain a probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer; the mass ratio of the probenazole to the 1-vinyl imidazole to the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide to the initiator to the high boiling point solvent is 1.2; the initiator is azobisisobutyronitrile; the high boiling point solvent is N-methyl pyrrolidone; the inert gas is nitrogen.
The PBT resin is American Tycona 1700A high molecular weight PBT Celanex.
A preparation method of an antibacterial heat-conducting PBT composite material comprises the following steps: uniformly mixing the raw materials in parts by weight to obtain a mixed material, and then putting the mixed material into a double-screw extruder for extrusion molding to obtain the antibacterial heat-conducting PBT composite material; the extrusion molding process parameters are as follows: the temperature of each section of the double-screw extruder is from a feed inlet, and is sequentially 210 ℃, 225 ℃, 240 ℃, 255 ℃, 260 ℃ and 260 ℃, the head temperature of the extruder is 260 ℃, and the screw rotating speed is 440r/min.
Comparative example 1
An antibacterial heat-conducting PBT composite material has a formula and a preparation method which are basically the same as those of example 1, except that probenazole is not added in the preparation process of the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer.
Comparative example 2
An antibacterial heat-conducting PBT composite material has a formula and a preparation method which are basically the same as those of example 1, except that 1-vinylimidazole is not added in the preparation process of the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer.
Meanwhile, in order to evaluate the specific technical effect of the antibacterial heat-conducting PBT composite material, the antibacterial heat-conducting PBT composite material in the embodiment and the comparative example of the invention is subjected to related performance tests, and the adopted standards and test results of the tests are shown in Table 1. The heat aging resistance is measured by placing each product in hot air at 90 ℃ for an artificial accelerated aging test for 96h, and the larger the value is, the better the heat aging resistance is.
TABLE 1
| Item | Tensile Strength (MPa) | Notched impact strength 23 ℃ (KJ/m) 2 ) | Coefficient of thermal conductivity (W/m. K) | Staphylococcus aureus antibacterial ratio (%) | Thermal aging resistance (%) |
| Test standard | GB/T 1040.1-2018 | GB/T20186.1-2006 | ASTM D5470 | JIS Z 2801 | — |
| Example 1 | 97.0 | 8.8 | 2.45 | 99.62 | 99.21 |
| Example 2 | 98.3 | 9.0 | 2.58 | 99.79 | 99.45 |
| Example 3 | 99.4 | 9.3 | 2.66 | 99.85 | 99.53 |
| Example 4 | 100.9 | 9.4 | 2.79 | 99.93 | 99.69 |
| Example 5 | 102.0 | 9.6 | 2.90 | 99.99 | 99.85 |
| Comparative example 1 | 95.4 | 7.8 | 2.36 | 95.88 | 97.89 |
| Comparative example 2 | 94.7 | 8.2 | 2.40 | 96.23 | 98.76 |
As can be seen from Table 1, the antibacterial heat-conducting PBT composite material disclosed by the embodiment of the invention has better mechanical property, toughness, heat conductivity, antibacterial property and heat aging resistance compared with a comparative product, and the introduction of the probenazole and 1-vinylimidazole structures is beneficial to improving the above properties.
The foregoing is illustrative of the preferred embodiments of the present invention, and is not to be construed as limiting the invention in any way; those of ordinary skill in the art can readily practice the present invention as described herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The antibacterial heat-conducting PBT composite material is characterized by being prepared from the following raw materials in parts by weight: 55-65 parts of PBT resin, 15-20 parts of probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer, 3-5 parts of coupling agent, 10-15 parts of carbon fiber, 2-4 parts of graphene oxide, 1-3 parts of nano zinc oxide, 3-6 parts of 4,4' -diacyl chloride diphenyl ether, 1-3 parts of anhydrous aluminum chloride, 0.6-0.8 part of antioxidant and 0.3-0.5 part of lubricant.
2. The antibacterial heat-conducting PBT composite material as claimed in claim 1, wherein said lubricant is at least one of paraffin and polydimethylsiloxane; the antioxidant is at least one of antioxidant 1010 and antioxidant 168.
3. The antibacterial heat-conducting PBT composite material as claimed in claim 1, wherein the particle size of the nano zinc oxide is 20-60nm; the graphene oxide is hexa-structured LG-1401 graphene oxide, and the particle size of the graphene oxide is 800-1200 meshes.
4. The antibacterial heat-conducting PBT composite material as claimed in claim 1, wherein the carbon fibers have an average diameter of 3-5 μm and a length of 1-3mm; the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH570.
5. The antibacterial heat-conducting PBT composite material as claimed in claim 1, wherein the preparation method of the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer comprises the following steps: adding probenazole, 1-vinylimidazole, N- (4-cyano-3-trifluoromethylphenyl) methacrylamide and an initiator into a high-boiling-point solvent, stirring and reacting for 3-5 hours at 60-80 ℃ in an inert gas atmosphere, then precipitating out in water, and drying the precipitated polymer in a vacuum drying oven at 85-95 ℃ to constant weight to obtain the probenazole/1-vinylimidazole/N- (4-cyano-3-trifluoromethylphenyl) methacrylamide copolymer.
6. The antibacterial heat-conducting PBT composite material as claimed in claim 5, wherein the mass ratio of the probenazole, the 1-vinylimidazole, the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, the initiator and the high boiling point solvent is 1 (0.8-1.2) (1-3) (0.03-0.06) (15-20).
7. The antibacterial heat-conducting PBT composite material as claimed in claim 5, wherein said initiator is azobisisobutyronitrile; the high boiling point solvent is at least one of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone; the inert gas is any one of nitrogen, helium and neon.
8. The antibacterial heat-conducting PBT composite material of claim 1, wherein the PBT resin is a high molecular weight PBT Celanex of Taconna 1700A.
9. A method for preparing the antibacterial heat-conducting PBT composite material as claimed in any one of claims 1-8, which comprises the following steps: uniformly mixing the raw materials in parts by weight to obtain a mixed material, and then putting the mixed material into a double-screw extruder for extrusion molding to obtain the antibacterial heat-conducting PBT composite material.
10. The preparation method of the antibacterial heat-conducting PBT composite material as claimed in claim 9, wherein the extrusion molding process parameters are as follows: the temperature of each section of the double-screw extruder is 195-210 ℃, 215-225 ℃, 230-240 ℃, 245-255 ℃, 255-260 ℃ and 255-260 ℃ from the charging opening in sequence, the temperature of the extruder head is 250-260 ℃, and the rotating speed of the screw is 230-440 r/min.
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Application publication date: 20230328 |