CN115678142A - Antibacterial plastic, preparation method of antibacterial plastic and antibacterial plastic product - Google Patents
Antibacterial plastic, preparation method of antibacterial plastic and antibacterial plastic product Download PDFInfo
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- CN115678142A CN115678142A CN202110877435.4A CN202110877435A CN115678142A CN 115678142 A CN115678142 A CN 115678142A CN 202110877435 A CN202110877435 A CN 202110877435A CN 115678142 A CN115678142 A CN 115678142A
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- 150000001875 compounds Chemical class 0.000 claims abstract description 14
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- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims 1
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- 239000000463 material Substances 0.000 abstract description 20
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- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 2
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 2
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- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical group C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/28—Nitrogen-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/413—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties containing granules other than absorbent substances
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H13/00—Other non-woven fabrics
Abstract
The invention relates to the technical field of plastics and discloses an antibacterial plastic, a preparation method of the antibacterial plastic and an antibacterial plastic product, wherein the antibacterial plastic is prepared from C 3 N 4 And the compound and the thermoplastic thereof are prepared by heating and melting, and the C is 3 N 4 And the mass ratio of the compound thereof to the thermoplastic is 0.01-5:100. the antibacterial plastic has excellent antibacterial effect in the presence or absence of light, the antibacterial rate of escherichia coli and staphylococcus aureus is greater than 99.99%, the antibacterial capability is stable, metal pollution is avoided, and the antibacterial plastic can be used in the field of medical antibacterial materials according to the excellent antibacterial effect; and the antibacterial agent of the antibacterial plastic is only an inorganic non-metallic material C 3 N 4 And the compound and the thermoplastic plastic are only heated and melted after being mixed, and the preparation method is simple and has low production cost.
Description
Technical Field
The invention relates to the technical field of plastics, in particular to an antibacterial plastic, a preparation method of the antibacterial plastic and an antibacterial plastic product.
Background
Plastics are high molecular compounds (macromolecules) which are polymerized by polyaddition or polycondensation reactions using monomers as raw materials. The composite material has the advantages of light weight, stable chemical property, good impact resistance, higher transparency and abrasion resistance, good insulativity, low thermal conductivity, good formability and colorability, low processing cost and the like.
The plastic products play an indispensable role in the daily life and the industry and agriculture of the public, but the plastic products only provide convenience and ignore the antibacterial property, and a large amount of bacteria can be bred after long-term use and accumulation, thereby threatening the food safety and the human health. To overcome the antibacterial property, antibacterial agents are often added into plastics to form antibacterial plastics and plastic products. The mainstream antibacterial materials of the antibacterial plastics in the market at present are silver ion antibacterial agents and ZnO series antibacterial agents, but the cost of the antibacterial agents is high, and the prepared antibacterial plastics have the problems of metal pollution, large difference of antibacterial performance and instability. In addition, the existing photocatalytic material only has good photocatalytic effect under the condition of illumination, and the application of the material under the condition of no light is greatly limited.
Disclosure of Invention
The invention mainly aims to provide an antibacterial plastic, a preparation method of the antibacterial plastic and an antibacterial plastic product, and aims to solve the technical problems that the existing antibacterial plastics of silver ion antibacterial agents and ZnO series antibacterial agents are high in cost, unstable in antibacterial effect, and metal pollution exists, and a photocatalytic material has a good photocatalytic effect only under the illumination condition.
In order to achieve the above object, the present invention provides an antibacterial plastic, which is antibacterialThe plastic is composed of C 3 N 4 And its compound and thermoplastic plastics are made up by heating and melting, and the described C 3 N 4 And the mass ratio of the compound thereof to the thermoplastic is 0.01-5:100.
optionally, in one embodiment, the thermoplastic has the formula comprising-CH 3 and/or-CH 2 -a structure.
Optionally, in an embodiment, the thermoplastic comprises one or more of Polyethylene (PE), polyethylene terephthalate (PET), polycarbonate (PC), polymethylmethacrylate (PMMA), polyvinyl chloride (PVC), polypropylene (PP), polystyrene (PS), acrylonitrile Butadiene Styrene (ABS), polyamide (PA), thermoplastic Polyurethane (TPU).
Optionally, in an embodiment, the Polyethylene (PE) includes one or more of Low Density Polyethylene (LDPE), high Density Polyethylene (HDPE), and Linear Low Density Polyethylene (LLDPE).
Optionally, in an embodiment, the C 3 N 4 And complexes thereof comprising C 3 N 4 graphene/C 3 N 4 、SiO 2 /C 3 N 4 、GO/C 3 N 4 Boron doped with C 3 N 4 Silicon doped with C 3 N 4 Carbon doped with C 3 N 4 Phosphorus doped with C 3 N 4 Nitrogen doped with C 3 N 4 Oxygen-doped C 3 N 4 Sulfur doped with C 3 N 4 One or more of them.
In order to achieve the above object, the present invention further provides a method for preparing an antibacterial plastic, wherein the method for preparing the antibacterial plastic comprises the following steps:
respectively weighing C according to the proportion 3 N 4 And composites and thermoplastics thereof;
subjecting the C to 3 N 4 And the compound thereof and the thermoplastic plastic are uniformly mixed to obtain a mixture;
heating and melting the mixture.
Optionally, in an embodiment, the heating and melting temperature range is 100 ℃ to 300 ℃.
Optionally, in an embodiment, the time for heating and melting is 1 to 10 hours.
In order to achieve the aim, the invention also provides an antibacterial plastic product which is prepared from the antibacterial plastic through a plastic processing process.
Optionally, in one embodiment, the plastic processing process comprises injection molding, blow molding, suction molding, and extrusion molding.
In the technical scheme provided by the invention, an inorganic non-metallic material C is added 3 N 4 And the compound thereof is used as an antibacterial agent and added into thermoplastic plastics, so that the plastics have excellent antibacterial and catalytic properties, and the antibacterial and catalytic properties are mixed in a heating and melting way, and the inorganic non-metallic material C 3 N 4 And the compound thereof and the thermoplastic plastic react with each other to ensure that the inorganic non-metallic material C 3 N 4 And the compound thereof is firmly combined with the thermoplastic plastic, thereby forming the antibacterial plastic. The antibacterial plastic has excellent antibacterial effect and stable antibacterial capability under the condition of no light, and has no metal pollution; and the antibacterial agent of the antibacterial plastic is only an inorganic non-metallic material C 3 N 4 And the compound of the antibacterial plastic and the thermoplastic plastic can be heated and melted after being mixed, so that the preparation method of the antibacterial plastic is simple and the production cost is low.
Drawings
One or more embodiments are illustrated in the accompanying drawings, which correspond to the accompanying drawings, and the description is not to be construed as limiting the embodiments, unless otherwise specified, and the drawings are not to scale.
Fig. 1 is a raman spectrum of an antimicrobial plastic and Polyethylene (PE) material provided in an embodiment of the present invention in a certain period;
FIG. 2 is a Raman spectrum of an antimicrobial plastic and Polyethylene (PE) material in another interval provided in an embodiment of the present invention;
fig. 3 is an infrared spectrum of an antibacterial plastic and Polyethylene (PE) material provided in an embodiment of the present invention.
Detailed Description
In order to facilitate an understanding of the invention, reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
The antibacterial plastic comprises the following components of an inorganic non-metallic material C 3 N 4 And composites and thermoplastics thereof, said C 3 N 4 And complexes thereof comprising C 3 N 4 graphene/C 3 N 4 、SiO 2 /C 3 N 4 、GO/C 3 N 4 Boron doped with C 3 N 4 Silicon doped with C 3 N 4 Carbon doped with C 3 N 4 Phosphorus doped with C 3 N 4 Nitrogen doped with C 3 N 4 Oxygen-doped C 3 N 4 Sulfur doped with C 3 N 4 And the like; the thermoplastic plastics comprise one or more of Polyethylene (PE), polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), polypropylene (PP), polystyrene (PS), acrylonitrile-butadiene-styrene (ABS), polyamide (PA), thermoplastic Polyurethane (TPU) and other high polymer plastics. Wherein the Polyethylene (PE) can be one or more of Low Density Polyethylene (LDPE), high Density Polyethylene (HDPE), and Linear Low Density Polyethylene (LLDPE).
The antibacterial plastic has obvious antibacterial effect and can be applied to the field of medical antibacterial materials. In order to control the quality of medical plastic products, medical grade thermoplastic plastics are selected when medical antibacterial plastics are prepared.
The embodiment provides a preparation method of an antibacterial plastic, which comprises the following steps: respectively weighing 1 part by mass of inorganic nonmetallic material C 3 N 4 100 parts by mass of polyethylene, mixing the inorganic nonmetal material C 3 N 4 And fully and uniformly mixing with polyethylene, heating to 120-135 ℃, melting and mixing for 1-10 hours to obtain the antibacterial plastic.
The antibacterial plastic in the embodiment is further processed by a plastic processing technology to obtain an antibacterial plastic product. The antibacterial plastic can be made into an antibacterial plastic bag or a plastic film by using a plastic blow molding process, and in other embodiments, other plastic processing processes such as injection molding, plastic sucking, extrusion molding and the like can be used for preparing more different types of antibacterial plastic products.
The antibacterial plastic product prepared from the antibacterial plastic disclosed by the invention also has excellent antibacterial capability, and can be widely applied to various occasions needing antibiosis. According to different requirements, various antibacterial plastic products with different types and different purposes can be prepared and obtained through different plastic processing technologies. Various plastic articles such as those used in public places; plastic products used for food packaging and containing, plastic products used for decoration and the like.
According to the test data in the tables 2 and 3, the antibacterial plastic has excellent antibacterial effect under both the illumination and non-illumination conditions, the antibacterial rate of escherichia coli and staphylococcus aureus is more than 99.99%, the antibacterial capability is stable, and no metal pollution is caused. The excellent antibacterial effect of the antibacterial plastic can meet the daily antibacterial requirement and also meet the antibacterial requirement of medical antibacterial products. Therefore, the antibacterial plastic product can be used as a medical plastic product, in particular to a medical antibacterial plastic product, which comprises a medical cannula, a medical catheter, a medical hose, a medical straw, a medical pipeline, a dialysis filter, an oxygen mask, a medical shell, an injection container, a medical packaging product, an experimental vessel, a catheter plate, a transparent plastic cover, a disposable injector and the like.
1. And (3) comparison test of the antibacterial plastic:
1. the raman spectra of the antibacterial plastic and the Polyethylene (PE) material prepared in the examples are shown in fig. 1 and 2, respectively, the characteristic raman shift of the polyethylene chemical bond is shown in table 1,
TABLE 1 characteristic Raman shifts of polyethylene chemical bonds
| Raman shift/cm -1 | Corresponding structures and features | The |
| 1459 | CH 2 bending | N |
| 1438 | CH 2 bending | N |
| 1417 | CH 2 bending | C |
| 1293 | CH 2 twsiting | |
| 1127 | C-C stretching | C, |
| 1062 | C-C stretching | C,N |
In table 1, a, amorphous phase; c, a crystalline phase; n, intermediate phase.
The comparison between FIG. 1 and FIG. 2 shows that 1000-1500cm is shown in FIG. 1 -1 The antibacterial plastic is 1293cm -1 、1438cm -1 、1459cm -1 Signal enhancement, 1417cm -1 The signal was reduced, as can be seen from Table 1, 1293cm -1 -CH as crystalline and mesophase PE 2 Characteristic peak, 1417cm -1 is-CH of crystalline phase 2 Characteristic peak, 1438cm -1 Of mesophase PE 2 Characteristic peak, 1459cm -1 -CH for mesophase PE 2 -a characteristic peak; as shown in FIG. 2, 2700-3050cm -1 In the range of 2929cm, the antibacterial plastic -1 、2900cm -1 And 2846cm -1 The signal is weakened according to the research on the crystallization behavior and the structural property relationship of the ultra-high molecular weight polyethylene in the reference' Shuxin]Application of Shanghai, china east science and engineering university 2016 and Chenjiu Raman Spectrum in quality detection of polymer products [ D]Zhejiang university 2010, it is known that 2846cm-1 and 2879cm-1 are-CH 3 2900cm -1 、2929cm -1 Are respectively-CH 3 Symmetric tensile vibration peak and-CH 2 -stretching vibration peak.
Therefore, as can be seen from fig. 1 and 2 in combination with table 1, the inorganic nonmetallic material C 3 N 4 Adding to PE, after heating to melt mix, -CH in PE 3 and-CH 2 Molecular Structure and inorganic nonmetallic materials C 3 N 4 React to form-CH 3 and-CH 2 The breakage of the bonds, which allows the PE molecules to rearrange and form new crystalline and intermediate PE molecules.
2. The antibacterial plastic and Polyethylene (PE) materials prepared in the examples were respectively subjected to infrared spectroscopy, and the obtained infrared spectra are shown in fig. 3.
Polyethylene (PE) at 1471cm -1 The characteristic peak of (A) is the typical C-H in-plane bending vibration peak, and 2774-3117cm -1 The broad peak is C-H stretching vibration peak and is positioned at 1376cm -1 At sum of 1302cm -1 The peak is C-C stretching vibration peak, the peak positions are infrared characteristic peaks of Polyethylene (PE), and inorganic non-metal material C is added into PE 3 N 4 Then the peak intensities of the characteristic peaks are correspondingly weakened; and adding an inorganic non-metallic material C 3 N 4 After, -CH 2 -a characteristic peak position of from 1083cm -1 Offset to 1016cm -1 Thus, it can be seen that the inorganic nonmetallic material C 3 N 4 Has strong interaction with PE, and can be observed to be positioned at 775cm in the infrared spectrum of the antibacterial plastic -1 C of (A) 3 N 4 The bending vibration peak of the triazine ring in the structure is positioned at 2152cm -1 C of (A) 3 N 4 A characteristic peak of C.ident.N in the structure, the above-mentioned C 3 N 4 All proves that the inorganic nonmetallic material C 3 N 4 Was successfully introduced into the PE.
Thus inorganic non-metallic material C in antibacterial plastics 3 N 4 The antibacterial plastic is firmly combined with PE molecules and is not easy to fall off, so that the antibacterial performance of the antibacterial plastic is stable and long-lasting.
2. And (3) antibacterial property test of the antibacterial plastic:
1. antibacterial tests of the antibacterial plastics prepared in the examples were carried out according to the national standard GB/T31402-2015 test method for antibacterial property of plastic surface, the test results are shown in Table 2, and the tests were carried out in a normal low-light environment.
TABLE 2 GB/T31402-2015 test result of plastic surface antibacterial property test method
In Table 2, the non-processed test pieces were polyethylene, and the antibacterial test pieces were antibacterial plastics
2. Antibacterial tests of the antibacterial plastics prepared in the examples are carried out according to national standard GB/T30706-2014 antibacterial test method and evaluation of photocatalytic antibacterial materials and products under visible light irradiation, and the test results are shown in Table 3.
TABLE 3 GB/T30706-2014 antibacterial test method and evaluation test result for photocatalytic antibacterial material and product under visible light irradiation
In table 3, the blank control sample is polyethylene, the control sample is the film for the experimental test, and the photocatalytic sample is antibacterial plastic.
3. Pure phase C is tested according to national standard GB/T30706-2014 antibacterial test method and evaluation of photocatalytic antibacterial material and product under visible light irradiation 3 N 4 The powders were subjected to the antibacterial test, and the test results are shown in table 4.
TABLE 4 pure phase C under irradiation of visible light GB/T30706-2014 3 N 4 Powder antibacterial test method and evaluation
In Table 4, the blank control was polyethylene, the control was the experimental test membrane, and the photocatalytic sample was pure phase C 3 N 4 And (3) powder.
Pure phase inorganic non-metallic material C 3 N 4 The antibacterial rate to escherichia coli and staphylococcus aureus is about 80% generally; the test results in tables 2 and 3 show that the antibacterial plastic prepared in the examples has an antibacterial rate of over 99% for both escherichia coli and staphylococcus aureus, and has strong antibacterial property.
In addition, as can be seen from the test results of tables 3 and 4, phase C was pure under dark conditions 3 N 4 The antibacterial rate of the powder is as follows: [ (7X 10) 6 )-(3.3×10 6 )]/(7×10 6 ) 100% =52.9%, while being implemented in dark conditionsThe antibacterial rate of the antibacterial plastic prepared in the example is as follows: [ (4.9X 10) 6 )-(1.2×10 2 )]/(4.9×10 6 ) 100% =99.99%, and shows that the antibacterial plastic prepared by the invention has excellent antibacterial effect under both light and no light conditions.
In conclusion, the antibacterial plastic prepared by the invention has excellent antibacterial property for bacteria such as escherichia coli, staphylococcus aureus and the like, and the application range of the thermoplastic material in the field of antibacterial products is greatly expanded.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An antibacterial plastic is characterized by consisting of C 3 N 4 And the compound and the thermoplastic thereof are prepared by heating and melting, and the C is 3 N 4 And the mass ratio of the compound thereof to the thermoplastic is 0.01-5:100.
2. the antimicrobial plastic of claim 1, wherein the thermoplastic has the formula comprising-CH 3 and/or-CH 2 -a structure.
3. The antimicrobial plastic of claim 2, wherein the thermoplastic comprises one or more of polyethylene, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, polyvinyl chloride, polypropylene, polystyrene, acrylonitrile-butadiene-styrene, polyamide, thermoplastic polyurethane.
4. Antimicrobial plastic according to claim 3, wherein the polyethylene comprises one or more of low density polyethylene, high density polyethylene, linear low density polyethylene.
5. Antimicrobial plastic according to claim 1, characterized in that C is 3 N 4 And complexes thereof comprising C 3 N 4 graphene/C 3 N 4 、SiO 2 /C 3 N 4 、GO/C 3 N 4 Boron doped with C 3 N 4 Silicon doped with C 3 N 4 Carbon doped with C 3 N 4 Phosphorus doped C 3 N 4 Nitrogen doped with C 3 N 4 Oxygen-doped C 3 N 4 Sulfur doped with C 3 N 4 One or more of them.
6. A preparation method of antibacterial plastic, which is used for preparing the antibacterial plastic of any one of claims 1-5, and comprises the following steps:
weighing C according to the proportion 3 N 4 And composites and thermoplastics thereof;
subjecting said C to 3 N 4 And the compound and the thermoplastic plastic are mixed uniformly to obtain a mixture;
heating and melting the mixture.
7. The method for preparing antibacterial plastic according to claim 6, wherein the temperature range of the heating and melting is 100-300 ℃.
8. The method for preparing antibacterial plastic according to claim 7, wherein the time for heating and melting is 1-10 hours.
9. An antimicrobial plastic product, characterized in that the antimicrobial plastic product is produced by a plastic processing technology according to any one of claims 1-5.
10. The antimicrobial plastic article of claim 9, wherein the plastic processing comprises injection molding, blow molding, suction molding, and extrusion molding.
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