CN115975285A - Preparation method and application of antibacterial PP material - Google Patents
Preparation method and application of antibacterial PP material Download PDFInfo
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- CN115975285A CN115975285A CN202210828409.7A CN202210828409A CN115975285A CN 115975285 A CN115975285 A CN 115975285A CN 202210828409 A CN202210828409 A CN 202210828409A CN 115975285 A CN115975285 A CN 115975285A
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 51
- 239000000463 material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 75
- 239000004743 Polypropylene Substances 0.000 claims abstract description 66
- 229920001155 polypropylene Polymers 0.000 claims abstract description 51
- -1 polypropylene Polymers 0.000 claims abstract description 24
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 18
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 18
- 239000007822 coupling agent Substances 0.000 claims abstract description 16
- 239000002250 absorbent Substances 0.000 claims abstract description 13
- 230000002745 absorbent Effects 0.000 claims abstract description 13
- 229920013716 polyethylene resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 150000004693 imidazolium salts Chemical group 0.000 claims description 13
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 10
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical group CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 claims description 8
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 3
- 229920001661 Chitosan Polymers 0.000 claims description 2
- 150000004714 phosphonium salts Chemical group 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000006087 Silane Coupling Agent Substances 0.000 description 5
- 230000005764 inhibitory process Effects 0.000 description 5
- WLFDEVVCXPTAQA-UHFFFAOYSA-N 3-(4-methoxyphenoxy)benzaldehyde Chemical group C1=CC(OC)=CC=C1OC1=CC=CC(C=O)=C1 WLFDEVVCXPTAQA-UHFFFAOYSA-N 0.000 description 4
- 241000588724 Escherichia coli Species 0.000 description 4
- OKOBUGCCXMIKDM-UHFFFAOYSA-N Irganox 1098 Chemical group 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 description 4
- 241000589517 Pseudomonas aeruginosa Species 0.000 description 4
- 241000191967 Staphylococcus aureus Species 0.000 description 4
- 230000001954 sterilising effect Effects 0.000 description 4
- 238000004659 sterilization and disinfection Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910010413 TiO 2 Inorganic materials 0.000 description 3
- 230000001580 bacterial effect Effects 0.000 description 3
- 239000013522 chelant Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 102220040412 rs587778307 Human genes 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 210000000170 cell membrane Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
- 238000007344 nucleophilic reaction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 208000003322 Coinfection Diseases 0.000 description 1
- 206010011409 Cross infection Diseases 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000022 bacteriostatic agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000007254 oxidation reaction Methods 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
- 150000003904 phospholipids Chemical class 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of antibacterial high polymer materials, and provides a preparation method of an antibacterial PP material, wherein in the technology, the raw materials of the antibacterial PP material comprise 30-45% of polypropylene resin, 30-50% of polyethylene resin, 5-10% of a coupling agent, 8-15% of an antibacterial agent, 3-5% of an antioxidant and 0.5-2.0% of an ultraviolet absorbent; the prepared antibacterial PP material has good mechanical property, ultraviolet aging resistance and antibacterial effect by controlling the content of each component in the antibacterial PP material and the production process; the antibacterial PP material prepared by the method can be used for medical antibacterial tools or medical clothing.
Description
Technical Field
The application relates to the technical field of antibacterial high polymer materials, C08L23/12, in particular to a preparation method and application of an antibacterial PP material.
Background
The polypropylene (PP) material has the characteristics of stable chemical property, good mechanical property, no toxicity, heat resistance, lower cost and the like, and is widely applied to industries of automobiles, food packaging, medical biomaterials, household appliances and the like. However, due to the hydrophobic property of PP, bacteria are easy to adhere to the surface of PP and grow, and then a biological film is generated. The presence of biofilms is prone to "secondary infections" and "cross-infections", causing a series of health and health safety problems. In addition, in the medical hygiene field, because the PP material is often sterilized by ultraviolet lamp irradiation, the common PP material is easy to age in the long-term irradiation process, the mechanical property of the PP material is influenced, and the application of the PP material as a medical antibacterial material is limited.
CN109293838B discloses a grafted antibacterial polypropylene and a preparation process thereof, wherein the grafted antibacterial polypropylene is prepared by grafting maleic anhydride containing carbonyl groups onto side chains of polypropylene through a grafting reaction of the polypropylene and the maleic anhydride, so that the grafted polypropylene has carbonyl groups for a nucleophilic reaction; and carrying out nucleophilic reaction on the brominated organic antibacterial agent and the grafted polypropylene to obtain the novel grafted antibacterial polypropylene, wherein although the antibacterial polypropylene prepared by the technology has good and long-acting antibacterial performance, the process has strict requirements on reaction conditions such as temperature, time and purification, and the process is complex and time-consuming.
CN112094431A provides a preparation method of a polypropylene wax-based nano-silver antibacterial material, and discloses that the antibacterial material is nano-silver simple substance particles and/or carrier-loaded nano-silver particles; in order to improve the antibacterial performance of the material, the dosage of the nano-silver antibacterial agent is large, but the high cost of the nano-silver antibacterial agent limits the application range of the nano-silver antibacterial agent; in addition, the nano silver is a contact bacteriostatic agent, and the nano silver in the material does not have a good antibacterial effect, so that the polypropylene material is inhibited from exerting antibacterial performance to a certain extent.
Disclosure of Invention
In order to solve the technical problems, the application provides a preparation method of an antibacterial PP material, which comprises the following steps:
(1) According to the mass percentage, 30 to 45 percent of polypropylene resin, 30 to 50 percent of polyethylene resin, 5 to 10 percent of coupling agent, 8 to 15 percent of antibacterial agent, 3 to 5 percent of antioxidant and 0.5 to 2.0 percent of ultraviolet absorbent are added into a mixer and stirred for 3 to 10 minutes under 300 to 500 revolutions.
(2) Adding the stirred raw materials into a screw extruder, wherein the temperature of the extruder is set as follows: temperature in the first zone: 150-180 ℃, temperature in zone two: 190-200 ℃, three-zone temperature: 210-220 ℃, temperature of discharge port: the rotating speed is controlled to be 350-400 revolutions at 220-240 ℃.
(3) And (5) injection molding.
After the polyethylene resin elastomer and the PP are blended, elastomer particles in the material can absorb part of impact energy, and can be used as a stress concentrator to induce and inhibit crack growth, so that the impact strength of the PP material is improved, and the toughness of the PP is effectively improved.
Preferably, in the step (1), the raw materials include, by mass, 40% of a polypropylene resin, 37% of a polyethylene resin, 8% of a coupling agent, 10% of an antibacterial agent, 4% of an antioxidant, and 1% of an ultraviolet absorber.
Further, the coupling agent is titanate coupling agent and/or silane coupling agent.
Preferably, the coupling agent is a silane coupling agent KH550.
Further, the antibacterial agent includes an inorganic antibacterial agent and an organic antibacterial agent; the synergistic effect of the two antibacterial agents is utilized to achieve the broad-spectrum and high-efficiency sterilization effect.
Further, the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent in the antibacterial agent is 4:1-1:2.
Still further, the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent in the antibacterial agent is 3:1-1:1.
Most of the inorganic antibacterial agents are nano solid particles, the mechanical strength of PP can be increased by adding the inorganic antibacterial agents to a certain degree, but when the dosage of the inorganic antibacterial agents is too much, on one hand, the rigidity of PP materials is excessively increased, on the other hand, the compatibility of a system can be reduced, and partial dissolution of the nano solid particles in the system can be caused, so that the appearance smoothness and the antibacterial property of PP are reduced; the organic antibacterial agent can be mutually stabilized with resin, an antioxidant, a coupling agent and inorganic antibacterial particles in a system through various intermolecular forces, and the organic antibacterial agent carries a part of charge amount, so that the charge amount balance of the system can be destroyed when the organic antibacterial agent is excessive, and the antibacterial property of a PP (polypropylene) production process and a product is influenced; therefore, the ratio of the two needs to be adjusted to balance the antibacterial property and stability of the system.
In a preferred embodiment, when the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent in the antibacterial agent is 2:1, the prepared antibacterial PP material has an initial impact strength of 7.9KJ/m 2 After 15 days of ultraviolet accelerated aging, the impact strength can still keep 75 percent of the original impact strength, the inhibition rate on escherichia coli is 91 percent, the inhibition rate on staphylococcus aureus is 97 percent, and the inhibition rate on pseudomonas aeruginosa is 98 percent.
Further, the inorganic antibacterial agent is one or a combination of several of nano silver, nano zinc oxide and nano titanium dioxide.
Preferably, the inorganic antibacterial agent is nano titanium dioxide (TiO) 2 )。TiO 2 Under the action of light, a large amount of hydroxyl free radicals and oxygen free radicals can be generated on the surface, so that various microorganisms can generate organic substance oxidation reaction, and the sterilization effect can be achieved in a short time. Nanoscale TiO 2 The proportion of the atomic number on the surface of the particle is increased, and the light absorption efficiency is obviously improved, so that the generation concentration of surface photon-generated carriers is increased; in addition TiO 2 The smaller the particle size, the shorter the time required for the carriers to reach the particle surface, and the faster the sterilization speed.
Further, the organic antibacterial agent is one or a combination of several of chitosan, quaternary ammonium salts, modified graphene oxide, quaternary phosphonium salts and imidazolium salts.
Further, the organic antibacterial agent is one or a combination of more of quaternary ammonium salts, modified graphene oxide and imidazolium salts.
According to the application, when the organic antibacterial agent is an imidazolium salt, the PP material prepared by combining the organic antibacterial agent with the inorganic antibacterial agent has the highest inhibition effect on escherichia coli, staphylococcus aureus and pseudomonas aeruginosa. Presumably, the following: the imidazolium salt antibacterial agent has cationic property, when the imidazolium salt antibacterial agent acts on a phospholipid bilayer of a bacterial cell membrane, the hydrophobic end group can destroy the integrity of the bacterial cell membrane attached to the surface of a matrix through electrostatic interaction, so that extracellular substances enter cells or intracellular substances leak out, and the bacterial cells lose activity; in addition, the molecular structure of the imidazolium salt has an unsaturated five-membered ring and an N atom with larger electronegativity, and van der Waals force or hydrogen bond acting force can be formed between the imidazolium salt, the antioxidant and the coupling agent, so that the stability of the imidazolium salt in a system is improved.
Further, the antioxidant is one or a combination of several of amine antioxidant, phenol antioxidant and phosphite antioxidant.
Preferably, the antioxidant is antioxidant 1098.
Further, the ultraviolet absorbent is UV-P; the UV-P is 2- (2-hydroxy-5-methylphenyl) benzotriazole, a conjugated n electron system and an o-hydroxyphenyl substituent are contained in a molecule, hydroxyl and a nitrogen atom form a chelate ring, after the chelate structure absorbs ultraviolet rays, the molecular structure thermal vibration destroys a hydrogen bond, and the chelate ring is opened to change the ultraviolet rays into heat energy to be discharged so as to protect the structure and the performance of the material. In addition, the UV-P exists stably through interaction with other substances in the system, so that the ultraviolet aging resistance of the PP material is maintained.
Further, the extruder temperature in the step (2) is set as follows: temperature in the first zone: 155-170 ℃, temperature of the second zone: 190-197 ℃, three zone temperature: 213-218 ℃, discharge port temperature: 225-235 deg.C, and the rotation speed is controlled at 350-400 rpm. The temperature and the rotating speed of the extruder are regulated and controlled, so that the effective components in the system can be better melted, and the mechanical property and the antibacterial effect of the PP material are improved.
Preferably, the extruder temperature in the step (2) is set as: temperature in the first zone: 160 ℃, temperature in zone two: 195 ℃, three zone temperature: 215 ℃, discharge port temperature: the rotating speed is controlled at 400 revolutions at 230 ℃.
Has the beneficial effects that:
by controlling the content of each component in the antibacterial PP material and the production process, the prepared antibacterial PP material has good mechanical property, ultraviolet aging resistance and antibacterial effect, and has excellent inhibition effect on various bacteria such as escherichia coli, staphylococcus aureus and pseudomonas aeruginosa; the antibacterial PP material prepared by the method has good ultraviolet irradiation resistance and sterilization and bacteriostasis effects, so that the antibacterial PP material can be applied to medical antibacterial tools or medical clothing.
Detailed Description
Examples
Example 1
A preparation method of an antibacterial PP material comprises the following steps:
(1) According to the mass percentage, the raw materials of 40 percent of polypropylene resin, 37 percent of polyethylene resin, 8 percent of coupling agent, 10 percent of antibacterial agent, 4 percent of antioxidant and 1 percent of ultraviolet absorbent are added into a mixer, the temperature is 100 ℃, and the mixture is stirred for 5 minutes under 400 revolutions.
(2) Adding the stirred raw materials into a screw extruder, wherein the temperature of the extruder is set as follows: temperature in the first zone: 160 ℃, temperature in zone two: 195 ℃, three zone temperature: 215 ℃, discharge port temperature: the rotating speed is controlled at 400 revolutions at 230 ℃.
(3) And (5) injection molding.
The antibacterial agent comprises an inorganic antibacterial agent and an organic antibacterial agent, wherein the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent is 2:1; the inorganic antibacterial agent is nano titanium dioxide which is purchased from Xuancheng crystal Rui New Material Co., ltd, model VK-TG01; the imidazolium salt organic antibacterial agent is 4 (5) -hydroxymethyl imidazole hydrochloride (CAS: 32673-41-9) which is purchased from Jing Rui chemical engineering Co., ltd, hebei Heng; the ultraviolet absorbent is UV-P, and the coupling agent is silane coupling agent KH550 which is purchased from Nanjing warp and weft chemical Co., ltd; the antioxidant is an antioxidant 1098 which is purchased from Shanghai Lier New Material Co., ltd; the polypropylene resin is purchased from Shandong Xin Yi hong chemical technology Co., ltd, model T30S, and the polyethylene resin is purchased from Tai Kena, USA, model GUR 4150.
Example 2
A preparation method of an antibacterial PP material comprises the following steps:
(1) According to the mass percentage, 30 percent of polypropylene resin, 50 percent of polyethylene resin, 5 percent of coupling agent, 8 percent of antibacterial agent, 5 percent of antioxidant and 2 percent of ultraviolet absorbent are added into a mixer, the temperature is 120 ℃, and the mixture is stirred for 3 minutes under 400 revolutions.
(2) Adding the stirred raw materials into a screw extruder, wherein the temperature of the extruder is set as follows: temperature in the first zone: 150 ℃, temperature in zone two: 190 ℃, three zone temperature: 220 ℃, discharge port temperature: the rotating speed is controlled at 400 revolutions at 220 ℃.
(3) And (4) injection molding.
The antibacterial agent comprises an inorganic antibacterial agent and an organic antibacterial agent, and the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent is 1:2; the inorganic antibacterial agent is nano titanium dioxide which is purchased from Xuancheng crystal Rui New Material Co., ltd, model VK-TG01; the imidazolium salt organic antibacterial agent is 4 (5) -hydroxymethyl imidazole hydrochloride (CAS: 32673-41-9) which is purchased from Jing Rui chemical engineering Co., ltd, hebei Hu Heng; the ultraviolet absorbent is UV-P, and the coupling agent is silane coupling agent KH550 which is purchased from Nanjing warp and weft chemical Co., ltd; the antioxidant is an antioxidant 1098 which is purchased from Shanghai Lier New Material Co., ltd; the polypropylene resin is purchased from Shandong Xin Yi hong chemical technology Co., ltd, model T30S, and the polyethylene resin is purchased from Tai Kena, USA, model GUR 4150.
Example 3
The preparation method of the antibacterial PP material comprises the following steps:
(1) According to the mass percentage, 45 percent of polypropylene resin, 30 percent of polyethylene resin, 8 percent of coupling agent, 13 percent of antibacterial agent, 3.5 percent of antioxidant and 0.5 percent of ultraviolet absorbent are added into a mixer, the temperature is 120 ℃, and the mixture is stirred for 3 minutes under 400 revolutions.
(2) Adding the stirred raw materials into a screw extruder, wherein the temperature of the extruder is set as follows: temperature in the first zone: the temperature of the second zone is 150 ℃ as follows: 190 ℃, three zone temperature: 220 ℃, discharge port temperature: the rotating speed is controlled at 400 revolutions at 220 ℃.
(3) And (5) injection molding.
The antibacterial agent comprises an inorganic antibacterial agent and an organic antibacterial agent, and the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent is 4:1; the inorganic antibacterial agent is nano titanium dioxide which is purchased from Xuancheng crystal Rui New Material Co., ltd, model VK-TG01; the imidazolium salt organic antibacterial agent is 4 (5) -hydroxymethyl imidazole hydrochloride (CAS: 32673-41-9) which is purchased from Jing Rui chemical engineering Co., ltd, hebei Hu Heng; the ultraviolet absorbent is UV-P, and the coupling agent is silane coupling agent KH550 which is purchased from Nanjing warp and weft chemical Co., ltd; the antioxidant is an antioxidant 1098, which is purchased from Shanghai Li Er New materials Co., ltd; the polypropylene resin is purchased from Shandong Xin Yi hong chemical technology Co., ltd, model T30S, and the polyethylene resin is purchased from Tai Kena, USA, model GUR 4150.
Comparative example 1
The antibacterial agent only adopts organic antibacterial agent 4 (5) -hydroxymethyl imidazole hydrochloride, and is purchased from Jing Rui chemical industry Co., ltd, hebei Hu Heng; the rest was the same as in example 1.
Comparative example 2
The mass ratio of the inorganic antibacterial agent to the organic antibacterial agent in the antibacterial agent is 1: the rest was the same as in example 1.
Comparative example 3
The ultraviolet absorbent UV-9 is purchased from Nanjing warp Tianwei chemical Co Ltd; the rest was the same as in example 1.
The performance test method comprises the following steps:
1. ultraviolet aging test:
the accelerated aging is carried out for 15 days according to a plastic xenon lamp light source exposure test method described in GB/T16422.2-2014, and then the impact performance test is carried out according to GB/T12584-2008, and the test results of the examples are shown in Table 1.
2. And (3) antibacterial testing:
escherichia coli, staphylococcus aureus and pseudomonas aeruginosa are detected according to the standard QB/T2591-2003, the test results are the average values of 3 parallel experiments, and the example results are shown in Table 2.
And (3) performance test results:
TABLE 1
| Sample number | Initial impact Strength KJ/m 2 | Impact strength after aging KJ/m 2 |
| Example 1 | 7.9 | 5.9 |
| Example 2 | 7.5 | 5.3 |
| Example 3 | 7.1 | 4.9 |
| Comparative example 1 | 4.6 | 2.5 |
| Comparative example 2 | 5.8 | 3.5 |
| Comparative example 3 | 5.3 | 2.9 |
TABLE 2
Claims (10)
1. The preparation method of the antibacterial PP material is characterized by comprising the following steps:
(1) According to the mass percentage, 30 to 45 percent of polypropylene resin, 30 to 50 percent of polyethylene resin, 5 to 10 percent of coupling agent, 8 to 15 percent of antibacterial agent, 3 to 5 percent of antioxidant and 0.5 to 2.0 percent of ultraviolet absorbent are added into a mixer and stirred for 3 to 10 minutes under 300 to 500 revolutions;
(2) Adding the stirred raw materials into a screw extruder, wherein the temperature of the extruder is set as follows: temperature in the first zone: 150-180 ℃, temperature in zone two: 190-200 ℃, three-zone temperature: 210-220 ℃, discharge port temperature: controlling the rotation speed at 350-400 revolutions at 220-240 ℃;
(3) And (5) injection molding.
2. The method for preparing the antibacterial PP material according to claim 1, wherein in the step (1), the raw material polypropylene resin is 40%, the polyethylene resin is 37%, the coupling agent is 8%, the antibacterial agent is 10%, the antioxidant is 4%, and the ultraviolet absorbent is 1%.
3. The method for preparing the antibacterial PP material according to claim 1, wherein the antibacterial agent comprises an inorganic antibacterial agent and an organic antibacterial agent.
4. The preparation method of the antibacterial PP material according to claim 1, wherein the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent in the antibacterial agent is 4:1-1:2.
5. The preparation method of the antibacterial PP material according to claim 3, wherein the inorganic antibacterial agent is one or a combination of several of nano silver, nano zinc oxide and nano titanium dioxide.
6. The preparation method of the antibacterial PP material according to claim 3, wherein the organic antibacterial agent is one or a combination of chitosan, quaternary ammonium salts, modified graphene oxide, quaternary phosphonium salts and imidazolium salts.
7. The method for preparing the antibacterial PP material according to claim 3, wherein the organic antibacterial agent is imidazolium salt.
8. The method for preparing the antibacterial PP material according to claim 1, wherein the ultraviolet absorbent is UV-P.
9. The method for preparing antibacterial PP material according to claim 1, wherein the extruder temperature in the step (2) is set as follows: temperature in the first zone: 160 ℃, temperature in zone two: 195 ℃, three zone temperature: 215 ℃, discharge port temperature: the rotating speed is controlled at 400 revolutions at 230 ℃.
10. Use of the antibacterial PP material prepared by the preparation method according to any one of claims 1 to 9 in medical antibacterial tools or medical garments.
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