CN112143029B - Antibacterial agent preparation method, antibacterial agent and composite material - Google Patents

Antibacterial agent preparation method, antibacterial agent and composite material Download PDF

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CN112143029B
CN112143029B CN202011010160.6A CN202011010160A CN112143029B CN 112143029 B CN112143029 B CN 112143029B CN 202011010160 A CN202011010160 A CN 202011010160A CN 112143029 B CN112143029 B CN 112143029B
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CN112143029A (en
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刘凯
怀自力
陈伟
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Anhui Jianghuai Automobile Group Corp
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    • 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
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • 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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Abstract

The invention discloses an antibacterial agent preparation method, an antibacterial agent and a composite material, wherein the preparation method comprises the following steps of S1, weighing a certain amount of sodium hydroxide, tetraethyl orthosilicate, samarium nitrate hexahydrate, sodium dodecyl benzene sulfonate and deionized water, adding the weighed materials into a reaction vessel, and reacting at a first set temperature for a first set time to obtain a solution A; s2, weighing a certain amount of modified palygorskite B and solution A, reacting at a second set temperature for a second set time, filtering, washing, and drying in a vacuum drying oven at a third set temperature for a third set time to obtain solid C; s3, the solid C is placed in a muffle furnace and calcined at a fourth set temperature for a fourth set time. The invention has high antibacterial effect on staphylococcus aureus and escherichia coli.

Description

Antibacterial agent preparation method, antibacterial agent and composite material
Technical Field
The invention relates to a preparation method of an antibacterial agent, in particular to a preparation method of an antibacterial agent, an antibacterial agent and a composite material.
Background
With the development of society and the continuous improvement of the living standard of people, people put forward higher requirements on the quality and the sanitary level of the environment depending on living. Meanwhile, various pathogenic microorganisms are widely distributed in the nature, grow, reproduce and even mutate under certain conditions, not only can cause corrosion and decomposition of materials, but also threaten the health of human beings. Therefore, antibacterial products capable of guaranteeing health are increasingly favored by people. This is particularly important in automotive interiors, household articles, and children's toys.
An antimicrobial agent is a substance that effectively controls the growth of microorganisms or that can kill microorganisms directly. The present invention is intended to provide a novel antibacterial agent for plastic articles which can be applied to automobiles.
Disclosure of Invention
The invention aims to provide a preparation method of an antibacterial agent, which aims to overcome the defects in the prior art and can be widely applied to plastics in automobiles and household articles to improve the bacterium resistance of the plastics.
The invention provides a method for preparing an antibacterial agent, which comprises the following steps,
s1, weighing a certain amount of sodium hydroxide, tetraethyl orthosilicate, samarium nitrate hexahydrate, sodium dodecyl benzene sulfonate and deionized water, adding into a reaction vessel, and reacting at a first set temperature for a first set time to obtain a solution A;
s2, weighing a certain amount of modified palygorskite B and solution A, reacting at a second set temperature for a second set time, filtering, washing, and drying in a vacuum drying oven at a third set temperature for a third set time to obtain solid C;
s3, the solid C is placed in a muffle furnace and calcined at a fourth set temperature for a fourth set time.
The method for preparing the antibacterial agent, wherein optionally, the first set temperature is 50-70 ℃, and the first set time is 8-12 hours;
the second set temperature is 80-100 ℃, and the second set time is 9-11 hours;
the third set temperature is 70-90 ℃, and the third set time is 10-16 hours;
the fourth setting temperature is 600-800 ℃, and the fourth setting time is 6-8 hours.
The method for producing an antibacterial agent as described above, wherein, optionally, the modified palygorskite B in step S2 is produced by:
s21, taking a certain amount of palygorskite;
s22, grinding into powder and sieving with a 1000-mesh sieve.
The method for preparing an antibacterial agent as described above, wherein, optionally, in step S1, the mass ratio of sodium hydroxide, tetraethyl orthosilicate, samarium nitrate hexahydrate, sodium dodecylbenzenesulfonate, deionized water is 0.1 to 0.3: 50-70: 40-60: 0.2-0.4: 240-300.
The method for producing an antibacterial agent as described above, wherein, optionally, in step S2, the mass ratio of the modified palygorskite B to the solution a is 30 to 40: 120-160.
The invention also provides an antibacterial agent, wherein the antibacterial agent is prepared by the preparation method of any one of the antibacterial agents.
The invention also proposes a composite material, wherein the composite material comprises an antimicrobial agent as described above.
The composite material as described above, wherein optionally, the composite material is prepared by mixing 4 parts of the antibacterial agent per 96 parts of the thermoplastic, and extruding the mixture through a twin-screw extruder;
wherein, the mixing conditions of the thermoplastic and the antibacterial agent are as follows: stirred for at least 10 minutes by a high-speed mixer.
The composite material as described above, wherein optionally, the twin-screw extruder comprises six temperature zones arranged in sequence, the temperature of the first temperature zone is 120-230 ℃, the temperature of the second temperature zone is 180-.
The composite material as described above, wherein optionally the thermoplastic is one or a combination of polyethylene, polypropylene, polystyrene, polybutylene terephthalate, polyamide 6.
Compared with the prior art, the invention synthesizes a novel palygorskite/samarium oxide/SiO 2 type antibacterial agent, the antibacterial performance of the thermoplastic plastic can be improved by modifying the thermoplastic plastic with the antibacterial agent, and the antibacterial agent has great popularization significance in application to parts of automobile inner chambers, household articles and children toys. Especially has good antibacterial effect on staphylococcus aureus and escherichia coli.
Drawings
FIG. 1 is a flow chart of the steps of the present invention.
Detailed Description
The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The present invention will be described in detail with reference to the following embodiments in order to make the aforementioned objects, features and advantages of the invention more comprehensible.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
The raw materials used in the examples of the invention are as follows:
sodium hydroxide, chemical products, henan Hua Shuo, Inc.; tetraethyl orthosilicate, hominine new materials ltd; palygorskite, Gansu river rare earth new materials Co., Ltd; sm (NO3) 36H 2O, New materials, Shandong Desheng, Inc.; sodium dodecyl benzene sulfonate, chemical ltd, denv century dada; deionized water, Shanghai Joint test chemical reagents, Inc.; PBT (model 2002U), Japan treaty; PP (model Z30S), mazineb petrochemical; PE (model 5070), brocade ethylene; PA6 (model CM1017), eastern japan; PS (model 350), taiwan george.
The test instrument used in the present invention is as follows:
ZSK30 type twin-screw extruder, Germany W & P company; JL-1000 type tensile testing machine, produced by Guangzhou Youcai laboratory instruments; HTL900-T-5B injection molding machine, manufactured by Haita plastics machinery, Inc.; XCJ-500 impact tester, manufactured by Chengde tester; QT-1196 tensile tester, Gaotai detection instruments, Inc. of Dongguan; QD-GJS-B12K model high-speed mixer, Beijing Hengoded instruments and meters Co.
In the case of the example 1, the following examples are given,
referring to fig. 1, the present embodiment provides a method for preparing an antibacterial agent, wherein, with reference to the raw materials and the equipment used, the present embodiment comprises the following steps,
s1, weighing a certain amount of sodium hydroxide, tetraethyl orthosilicate, samarium nitrate hexahydrate, sodium dodecyl benzene sulfonate and deionized water, adding into a reaction vessel, and reacting at a first set temperature for a first set time to obtain a solution A; in the step, the mass ratio of sodium hydroxide, tetraethyl orthosilicate, samarium nitrate hexahydrate, sodium dodecyl benzene sulfonate and deionized water is 0.1-0.3: 50-70: 40-60: 0.2-0.4: 240-300.
S2, weighing a certain amount of modified palygorskite B and solution A, reacting at a second set temperature for a second set time, filtering, washing, and drying in a vacuum drying oven at a third set temperature for a third set time to obtain solid C; specifically, the modified palygorskite B is obtained by the following method: s21, taking a certain amount of palygorskite; s22, grinding into powder and sieving with a 1000-mesh sieve. Thus obtaining the modified palygorskite. Wherein the mass ratio of the modified palygorskite B to the solution A is 30-40: 120-160.
S3, the solid C is placed in a muffle furnace and calcined at a fourth set temperature for a fourth set time.
Specifically, the first set temperature may be 50 to 70 ℃, specifically 55 ℃, 60 ℃, 65 ℃ or the like, and the first set time may be 8 to 12 hours, specifically 8.5 hours, 9 hours, 9.5 hours, 10 hours, 10.5 hours, 11 hours, 11.5 hours.
The second set temperature is 80-100 deg.C, specifically 85 deg.C, 90 deg.C, 95 deg.C, 100 deg.C; the second set time is 9 to 11 hours, specifically 9.5 hours, 10 hours, 10.5 hours;
the third set temperature is 70 to 90 ℃, specifically 75 ℃, 80 ℃, 85 ℃ and the like, and the third set time is 10 to 16 hours, specifically 10.5 hours, 11 hours, 11.5 hours, 12 hours, 12.5 hours, 13 hours, 13.5 hours, 14 hours, 14.5 hours, 15 hours, 15.5 hours and the like; the fourth setting temperature is 600-800 deg.C, such as 610 deg.C, 620 deg.C, 630 deg.C, 640 deg.C, 650 deg.C, 660 deg.C, 670 deg.C, 680 deg.C, 690 deg.C, 700 deg.C, 710 deg.C, 720 deg.C, 730 deg.C, 740 deg.C, 750 deg.C, 760 deg.C, 770 deg.C, 780 deg.C, 790 deg.C, etc., and the fourth setting time is 6-8 hours, such as 6.5 hours, 7 hours, 7.5 hours, etc.
Example 2
This example presents an antimicrobial agent prepared by the method of preparation described in example 1.
Example 3
This example presents a composite material, wherein the composite material comprises an antimicrobial agent as described in example 2.
The composite material is prepared by mixing 4 parts of the antibacterial agent in 96 parts of thermoplastic plastics and extruding the mixture by a double-screw extruder; wherein, the mixing conditions of the thermoplastic and the antibacterial agent are as follows: stirred for at least 10 minutes by a high-speed mixer.
Specifically, the double-screw extruder comprises six temperature zones which are sequentially arranged, wherein the temperature of the first temperature zone is 200 ℃, the temperature of the second temperature zone is 230 ℃, the temperature of the third temperature zone is 230 ℃, the temperature of the fourth temperature zone is 230 ℃, the temperature of the fifth temperature zone is 230 ℃, the temperature of the sixth temperature zone is 230 ℃, the head temperature of the double-screw extruder is 230 ℃, and the screw rotating speed is 200 r/min.
In this embodiment, the thermoplastic is one or more of polyethylene, polypropylene, polystyrene, polybutylene terephthalate, and polyamide 6.
In order to facilitate a clear understanding of the concept and effects of the invention, the following description is given in terms of preparation, application and comparative examples, respectively, for different components:
preparation example 1
(1) Weighing 1g of sodium hydroxide and 500g of orthosilicic acidTetraethyl ester, 400g samarium nitrate hexahydrate (Sm (NO)3)3·6H2O), 2g of sodium dodecyl benzene sulfonate and 2.4kg of deionized water are added into a reaction vessel and reacted for 8 hours at 50 ℃ to obtain a solution A.
(2) Weighing a certain amount of palygorskite, grinding into powder, and sieving with a 1000-mesh sieve to obtain modified palygorskite B.
(3) Weighing 300g of modified palygorskite B and 1.2kg of solution A, adding into a reaction vessel, reacting for 9h at 80 ℃, filtering, washing, and placing in a vacuum drying oven at 70 ℃ for 10h to obtain solid C.
(4) Placing the solid C in a muffle furnace, calcining for 6hh at 600 ℃ to obtain palygorskite/samarium oxide/SiO2Type antibacterial agent P1.
Application example 1
And adding 4 parts of P1 into 96 parts of PP, stirring for 10min by a high-speed mixer, and then adding into a double-screw extruder for blending and extruding to obtain the PP composite material X1.
The double-screw extruder comprises six temperature zones which are sequentially arranged, wherein the temperature of the first temperature zone is 200 ℃, the temperature of the second temperature zone is 230 ℃, the temperature of the third temperature zone is 230 ℃, the temperature of the fourth temperature zone is 230 ℃, the temperature of the fifth temperature zone is 230 ℃, the temperature of the sixth temperature zone is 230 ℃, the head temperature of the double-screw extruder is 230 ℃, and the screw rotating speed is 200 r/min.
Comparative example 1
And (3) taking 96 parts of PP, stirring for 10min by using a high-speed mixer, and then adding the PP into a double-screw extruder for blending and extruding to obtain the PP composite material D1.
The antibacterial performance data of the PP composite materials prepared in the application example 1 and the comparative example 1 are shown in the following table:
Figure BDA0002697314720000061
from the above table, it can be seen that X1 has better antibacterial property than D1, which indicates that the antibacterial property of the PP composite material is better after the antibacterial agent of the present invention is added.
Preparation example 2
(1) 3g of hydrogen hydroxide are weighedSodium, 700g of tetraethylorthosilicate, 600g of samarium nitrate hexahydrate (Sm (NO)3)3·6H2O), 4g of sodium dodecyl benzene sulfonate and 3.0kg of deionized water are added into a reaction vessel and reacted for 12 hours at 70 ℃ to obtain a solution A.
(2) Weighing a certain amount of palygorskite, grinding into powder, and sieving with a 1000-mesh sieve to obtain modified palygorskite B.
(3) Weighing 400g of modified palygorskite B and 1.6kg of solution A, adding into a reaction vessel, reacting for 11h at 100 ℃, filtering, washing, and placing in a vacuum drying oven at 90 ℃ for 16h to obtain solid C.
(4) Placing the solid C in a muffle furnace, calcining for 8h at 800 ℃ to obtain palygorskite/samarium oxide/SiO2Type antibacterial agent P2.
Application example 2
Adding 4 parts of P2 into 96 parts of polybutylene terephthalate (PBT), stirring for 10min by a high-speed mixer, and then adding into a double-screw extruder for blending and extruding to obtain the PBT composite material X2.
The double-screw extruder comprises six temperature zones which are sequentially arranged, wherein the temperature of the first temperature zone is 200 ℃, the temperature of the second temperature zone is 260 ℃, the temperature of the third temperature zone is 260 ℃, the temperature of the fourth temperature zone is 260 ℃, the temperature of the fifth temperature zone is 260 ℃, the temperature of the sixth temperature zone is 260 ℃, the head temperature of the double-screw extruder is 260 ℃, and the screw rotating speed is 300 r/min.
Comparative example 2
And (3) taking 96 parts of PBT, stirring for 10min by using a high-speed mixer, and then adding the PBT into a double-screw extruder for blending and extruding to obtain the PBT composite material D2.
The antibacterial performance data of the PBT composite materials prepared in application example 2 and comparative example 2 are shown in the following table:
Figure BDA0002697314720000071
as can be seen from the above table, X2 has better antibacterial property than D2, which shows that the antibacterial property of the PBT composite material is better after the antibacterial agent is added.
Preparation example 3
(1) 2g of sodium hydroxide, 600g of tetraethyl orthosilicate and 500g of samarium nitrate hexahydrate (Sm (NO)3)3·6H2O), 3g of sodium dodecyl benzene sulfonate and 2.7kg of deionized water are added into a reaction vessel and reacted for 10 hours at the temperature of 60 ℃ to obtain a solution A.
(2) Weighing a certain amount of palygorskite, grinding into powder, and sieving with a 1000-mesh sieve to obtain modified palygorskite B.
(3) 350g of modified palygorskite B and 1.4kg of solution A are weighed, added into a reaction vessel, reacted for 10 hours at 90 ℃, filtered, washed and placed in a vacuum drying oven at 80 ℃ for 13 hours to obtain solid C.
(4) Placing the solid C in a muffle furnace, calcining for 6-8 h at 700 ℃ to obtain palygorskite/samarium oxide/SiO2Type antibacterial agent P3.
Application example 3
Adding 4 parts of P3 into 96 parts of Polyethylene (PE), stirring for 10min by a high-speed mixer, and then adding into a double-screw extruder for blending and extruding to obtain a PE composite material X3.
The double-screw extruder comprises six temperature zones which are sequentially arranged, wherein the temperature of the first temperature zone is 120 ℃, the temperature of the second temperature zone is 180 ℃, the temperature of the third temperature zone is 180 ℃, the temperature of the fourth temperature zone is 180 ℃, the temperature of the fifth temperature zone is 180 ℃, the temperature of the sixth temperature zone is 180 ℃, the head temperature of the double-screw extruder is 180 ℃, and the screw rotating speed is 300 r/min.
Comparative example 3
And (3) taking 96 parts of PE, stirring for 10min by using a high-speed mixer, and then adding the PE into a double-screw extruder for blending and extruding to obtain the PE composite material D3.
The antibacterial performance data of the PE composite prepared in application example 3 and comparative example 3 are shown in the following table:
Figure BDA0002697314720000081
from the above table, it can be seen that X3 is more antibacterial than D3, which indicates that the antibacterial performance of the PE composite is better after the antibacterial agent of the present invention is added.
Preparation example 4
(1) 3g of sodium hydroxide, 650g of tetraethyl orthosilicate and 460g of samarium nitrate hexahydrate (Sm (NO)3)36H2O), 4g of sodium dodecyl benzene sulfonate and 2.9kg of deionized water are added into a reaction vessel and reacted for 11 hours at 55 ℃ to obtain a solution A.
(2) Weighing a certain amount of palygorskite, grinding into powder, and sieving with a 1000-mesh sieve to obtain modified palygorskite B.
(3) 380g of modified palygorskite B and 1.5kg of solution A are weighed and added into a reaction vessel, the mixture reacts for 10 hours at 85 ℃, and after filtration and washing, the mixture is placed in a vacuum drying oven at 85 ℃ for 14 hours to obtain solid C.
(4) Placing the solid C in a muffle furnace, calcining for 8h at 650 ℃ to obtain palygorskite/samarium oxide/SiO2Type antibacterial agent P4.
Application example 4
Adding 4 parts of P4 into 96 parts of polyamide 6(PA6), stirring for 10min by a high-speed mixer, and then adding into a double-screw extruder for blending and extruding to obtain a PA6 composite material X4.
The double-screw extruder comprises six temperature zones which are sequentially arranged, wherein the temperature of the first temperature zone is 230 ℃, the temperature of the second temperature zone is 260 ℃, the temperature of the third temperature zone is 260 ℃, the temperature of the fourth temperature zone is 260 ℃, the temperature of the fifth temperature zone is 260 ℃, the temperature of the sixth temperature zone is 260 ℃, the head temperature of the double-screw extruder is 260 ℃, and the screw rotating speed is 320 r/min.
Comparative example 4
And (3) taking 96 parts of PA6, stirring for 10min by using a high-speed mixer, and then adding the PA6 into a double-screw extruder for blending and extruding to obtain the PA6 composite material D4.
The antibacterial performance data of the PA6 composite materials prepared in application example 4 and comparative example 4 are shown in the following table:
Figure BDA0002697314720000091
from the above table, it can be seen that X4 has better antibacterial property than D4, which indicates that PA6 composite material has better antibacterial property after the antibacterial agent of the present invention is added.
Preparation example 5
(1) 1g of sodium hydroxide, 660g of tetraethyl orthosilicate and 480g of samarium nitrate hexahydrate (Sm (NO)3)3·6H2O), 4g of sodium dodecyl benzene sulfonate and 2.9kg of deionized water are added into a reaction vessel and reacted for 10 hours at the temperature of 55 ℃ to obtain a solution A.
(2) Weighing a certain amount of palygorskite, grinding into powder, and sieving with a 1000-mesh sieve to obtain modified palygorskite B.
(3) 380g of modified palygorskite B and 1.5kg of solution A are weighed and added into a reaction vessel, the mixture reacts for 9 hours at the temperature of 85 ℃, and after filtration and washing, the mixture is placed in a vacuum drying oven at the temperature of 75 ℃ for 11 hours to obtain solid C.
(4) Placing the solid C in a muffle furnace, calcining for 7h at 610 ℃ to obtain palygorskite/samarium oxide/SiO2Type antibacterial agent P5.
Application example 5
Adding 4 parts of P5 into 96 Parts of Styrene (PS), stirring for 10min by a high-speed mixer, and then adding into a double-screw extruder for blending and extruding to obtain the PS composite material X5.
The double-screw extruder comprises six temperature zones which are sequentially arranged, wherein the temperature of the first temperature zone is 160 ℃, the temperature of the second temperature zone is 200 ℃, the temperature of the third temperature zone is 200 ℃, the temperature of the fourth temperature zone is 200 ℃, the temperature of the fifth temperature zone is 200 ℃, the temperature of the sixth temperature zone is 200 ℃, the head temperature of the double-screw extruder is 200 ℃, and the screw rotating speed is 280 r/min.
Comparative example 5
And (3) taking 96 parts of PS, stirring for 10min by using a high-speed mixer, and then adding the PS into a double-screw extruder for blending and extruding to obtain the PS composite material D5.
The antibacterial performance data of the PS composite materials prepared in the above application example 5 and comparative example 5 are shown in the following table:
Figure BDA0002697314720000101
as can be seen from the above table, X5 is more antibacterial than D5, which indicates that the antibacterial property of the PS composite material is better after the antibacterial agent of the present invention is added.
The preparation method of the antibacterial agent provided by the invention has the advantages that the antibacterial performance of the polyolefin material prepared by the preparation method is improved to a certain extent, the variety and the application field of the antibacterial agent are greatly expanded, and the preparation method has very important significance.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.

Claims (10)

1. A method for preparing an antibacterial agent, which is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s1, weighing a certain amount of sodium hydroxide, tetraethyl orthosilicate, samarium nitrate hexahydrate, sodium dodecyl benzene sulfonate and deionized water, adding into a reaction vessel, and reacting at a first set temperature for a first set time to obtain a solution A;
s2, weighing a certain amount of modified palygorskite B and solution A, reacting at a second set temperature for a second set time, filtering, washing, and drying in a vacuum drying oven at a third set temperature for a third set time to obtain solid C;
s3, the solid C is placed in a muffle furnace and calcined at a fourth set temperature for a fourth set time.
2. The method for producing an antibacterial agent according to claim 1, characterized in that: the first set temperature is 50-70 ℃, and the first set time is 8-12 hours;
the second set temperature is 80-100 ℃, and the second set time is 9-11 hours;
the third set temperature is 70-90 ℃, and the third set time is 10-16 hours;
the fourth setting temperature is 600-800 ℃, and the fourth setting time is 6-8 hours.
3. The method for producing an antibacterial agent according to claim 2, characterized in that: the modified palygorskite B in step S2 is prepared by the following steps:
s21, taking a certain amount of palygorskite;
s22, grinding into powder and sieving with a 1000-mesh sieve.
4. The method for producing an antibacterial agent according to claim 1, characterized in that: in step S1, the mass ratio of sodium hydroxide, tetraethyl orthosilicate, samarium nitrate hexahydrate, sodium dodecylbenzenesulfonate, and deionized water is 0.1 to 0.3: 50-70: 40-60: 0.2-0.4: 240-300.
5. The method for producing an antibacterial agent according to claim 4, characterized in that: in step S2, the mass ratio of the modified palygorskite B to the solution A is 30-40: 120-160.
6. An antimicrobial agent characterized by: the antibacterial agent is produced by the method for producing an antibacterial agent according to any one of claims 1 to 5.
7. A composite material characterized by: the composite material comprising the antimicrobial agent of claim 6.
8. The composite material of claim 7, wherein: the composite material is prepared by mixing 4 parts of the antibacterial agent in 96 parts of thermoplastic plastics and extruding the mixture by a double-screw extruder;
wherein, the mixing conditions of the thermoplastic and the antibacterial agent are as follows: stirred for at least 10 minutes by a high-speed mixer.
9. The composite material of claim 8, wherein: the double-screw extruder comprises six temperature zones which are sequentially distributed, wherein the temperature of the first temperature zone is 120-230 ℃, the temperature of the second temperature zone is 180-260 ℃, the temperature of the third temperature zone is 180-260 ℃, the temperature of the fourth temperature zone is 180-260 ℃, the temperature of the fifth temperature zone is 180-260 ℃, the temperature of the sixth temperature zone is 180-260 ℃, the head temperature of the double-screw extruder is 180-260 ℃, and the screw rotating speed is 200-320 r/min.
10. The composite material according to any one of claims 8 to 9, characterized in that: the thermoplastic plastic is one or the combination of more of polyethylene, polypropylene, polystyrene, polybutylene terephthalate and polyamide 6.
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