Antibacterial abs particles and method for making same

Abstract

The application relates to the technical field of ABS particle preparation, and discloses an antibacterial ABS particle and a preparation method thereof, the antibacterial ABS particle comprising the following raw materials: ABS resin, anti-aging natural rubber, a flame retardant, a lubricant, an ultraviolet absorber, antibacterial halloysite nanotubes and an initiator; wherein the anti-aging natural rubber is prepared by reacting epoxidized natural rubber with 2-mercaptobenzimidazole; the antibacterial halloysite nanotubes are prepared by reacting halloysite nanotubes with isonicotinic acid, and then reacting with 8-bromo-1-octene. The antibacterial ABS particle prepared by the application has excellent impact resistance, toughness, anti-aging performance and antibacterial performance, can exert long-term antibacterial and anti-aging effects, can meet the application requirements in various environments, greatly expands the use field of the ABS particle, significantly prolongs the service life of the ABS particle, and can generate great economic benefits.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ABS particle preparation, and particularly relates to an antibacterial ABS particle and a preparation method thereof. BACKGROUND

[0002] ABS particles are a kind of high polymer material synthesized by acrylonitrile, butadiene and styrene three chemical monomers. Because the ABS particles have the characteristics of non-toxicity, odorlessness, low water absorption and easy processing and strong dyeing performance, they become the first choice of raw materials for various products. However, the performance requirements of raw materials are different in different fields. When the ABS particles are applied to the field of automobile manufacturing, they are often used to produce bumpers, doors and other parts, which requires the ABS particles to have excellent impact resistance and toughness, so as to protect the stress change generated by the buffer when the vehicle collides and protect the safety of passengers. When the ABS particles are applied to the field of household appliance manufacturing, they are often used to produce refrigerators, washing machines, air conditioners and other electrical appliances, which requires the ABS particles to have good oxidation resistance, so as to maintain the smoothness and color stability of the surface of household appliances, prevent the household appliances from discoloration, aging and cracking due to oxidation, affect the appearance quality of the products, and ensure that the parts of the electrical appliances are not affected by oxidation for a long time, maintain good electrical performance, improve the safety and service life of the products, and have excellent antibacterial performance when the ABS particles are applied to the field of medical equipment and food packaging, so as to prevent the growth and reproduction of bacteria, fungi and other microorganisms and ensure the hygiene and safety of medical equipment and food.

[0003] However, the traditional ABS particles have poor antibacterial and antioxidant ability, and the impact resistance and toughness are difficult to meet the standards of high-demand fields, so the ABS particles usually need to be modified during use. For example, the patent with the publication number CN113278243B discloses an antibacterial and antistatic ABS plastic for household appliance shell and a preparation method thereof. The composite antibacterial aerogel powder with antibacterial effect is prepared, the defect that silver ions are difficult to release due to the adsorption of particulate impurities in the air by the traditional loaded antibacterial agent is overcome, the prepared ABS plastic has excellent antibacterial performance, and in order to prevent the oxidation of the household appliance shell from affecting the appearance and safety of the electrical appliance, the antioxidant is directly added to participate in the preparation process of the ABS plastic. However, the small-molecule antioxidant is prone to precipitation after a long time, and has the problem of short anti-aging effect, which affects the service life of the household electrical appliance. SUMMARY

[0004] The application aims to provide an antibacterial ABS particle and a preparation method thereof, and solves the following technical problems: (1) the common ABS particle does not have antibacterial function, which limits its application field; (2) the common ABS particle has low toughness and poor impact resistance; (3) the common ABS particle has poor aging resistance and short service life.

[0005] The application can achieve the above-mentioned purposes through the following technical solutions.

[0006] An antibacterial ABS particle comprises the following raw materials by weight: 60-80 parts of ABS resin, 15-20 parts of anti-aging natural rubber, 3-5 parts of flame retardant, 2-4 parts of lubricant, 1-3 parts of ultraviolet absorber, 5-8 parts of antibacterial halloysite nanotube and 1-2 parts of initiator; the anti-aging natural rubber is prepared by reacting epoxidized natural rubber with 2-mercaptobenzimidazole; the antibacterial halloysite nanotube is prepared by reacting halloysite nanotube with isonicotinic acid, and then reacting with 8-bromo-1-octene.

[0007] Further, the flame retardant is any one of allyl phosphonic acid diethyl ester and triisopropyl phosphate; the lubricant is any one of stearic acid and stearic acid amide; the ultraviolet absorber is any one of ultraviolet absorber UV326 and ultraviolet absorber UV328; and the initiator is any one of dicumyl peroxide, benzoyl peroxide and di-t-butyl peroxide.

[0008] Further, the preparation method of the anti-aging natural rubber is as follows:

[0009] The epoxidized natural rubber is placed in N,N-dimethylformamide, fully stirred, and then nitrogen is introduced, 2-mercaptobenzimidazole and a catalyst are added, the temperature is raised to 80-90 DEG C, and the reaction is carried out for 12-20 hours, and then the product is collected to obtain the anti-aging natural rubber.

[0010] In the present application, under the action of the catalyst, the epoxy group in the structure of the epoxidized natural rubber reacts with the mercapto group in the structure of 2-mercaptobenzimidazole to obtain the anti-aging natural rubber, which has excellent elasticity and high ductility, and can absorb and disperse energy when the ABS particle is impacted, reduce the tendency of stress concentration and crack propagation, improve the toughness of the ABS particle, and the benzimidazole group in the structure of the anti-aging natural rubber can improve the rigidity of the ABS particle, and can also capture free radicals to block the oxidation degradation reaction caused by the free radicals, and the reducing sulfur bond in the structure can react with the oxidizing agent to prevent the oxidation process of the ABS particle, significantly improve the aging resistance of the ABS particle, and prolong the service life.

[0011] Further, the catalyst is triethylamine.

[0012] Further, the preparation method of the antibacterial halloysite nanotube is:

[0013] S1: placing halloysite nanotubes in tetrahydrofuran, ultrasonic dispersion for 15-20 min, adding sodium hydroxide for activation treatment for 3-5 h, adding isonicotinic acid, fully stirring for 6-8 h, and obtaining modified halloysite nanotubes after filtering, washing and drying;

[0014] S2: placing the modified halloysite nanotubes in ethanol, adding 8-bromo-1-octene, and refluxing to react, and then filtering, washing and vacuum drying to obtain antibacterial halloysite nanotubes.

[0015] In this scheme, the activity of the surface hydroxyl group of the halloysite nanotubes is enhanced after the activation treatment with sodium hydroxide, thereby interacting with the carboxyl group in the structure of isonicotinic acid, so that it can be coated on the surface of the halloysite nanotubes to obtain modified halloysite nanotubes. Through the refluxing reaction, the tertiary amine on the surface of the halloysite nanotubes undergoes quaternization reaction with the active bromine in the structure of 8-bromo-1-octene, and multiple quaternary ammonium groups and carbon-carbon double bonds are coated on the surface of the halloysite nanotubes to obtain antibacterial halloysite nanotubes. The antibacterial halloysite nanotubes have excellent mechanical properties. The double bonds coated on the surface can produce crosslinking sites, and can produce crosslinking reaction with the matrix when mixed with the matrix in a molten state, so that they can be uniformly dispersed in the matrix and are not easy to agglomerate, thereby significantly enhancing the mechanical properties of the ABS particles. Meanwhile, the surface is also coated with quaternary ammonium groups. Such groups can destroy the cell membrane structure of bacteria and affect the survival and reproduction of bacteria, thereby having a broad-spectrum bactericidal effect. After being mixed with the matrix, the ABS particles can have excellent antibacterial properties, and the antibacterial substances are not easy to precipitate even after long-term use, thereby having a long-term antibacterial effect and meeting the application requirements in various fields, thereby greatly expanding the application field of the ABS particles.

[0016] Further, in step S1, the concentration of the sodium hydroxide is 1-2 mol / L.

[0017] Further, in step S2, the refluxing reaction time is 24-48 h.

[0018] A preparation method of antibacterial ABS particles, comprising the following steps:

[0019] Step one, placing ABS resin, anti-aging natural rubber, flame retardant, lubricant, and ultraviolet absorber in a high-speed mixer, and fully mixing to obtain a premix;

[0020] Step two, the premix is placed in a twin-screw extruder, the antibacterial halloysite nanotube and the initiator are added, the screw rotation speed and the temperature of each zone of the twin-screw extruder are set, and the melt extrusion granulation is carried out, and after being cooled to room temperature, the ABS particles are obtained.

[0021] Further, in step two, the screw rotation speed of the twin-screw extruder is 150-250 r / min; the temperature of each zone of the twin-screw extruder is respectively a zone temperature of 200-210 DEG C, a zone temperature of 210-220 DEG C, a zone temperature of 220-230 DEG C, a zone temperature of 230-240 DEG C, a zone temperature of 210-220 DEG C, and an extrusion temperature of 190-200 DEG C.

[0022] Advantages of the present application

[0023] The present application is prepared by preparing anti-aging natural rubber and antibacterial halloysite nanotube into the preparation process of ABS particles, so that the prepared ABS particles have excellent mechanical properties, anti-aging properties and antibacterial properties, and have long-lasting antibacterial and anti-aging effect, which can meet the needs of various application fields, and has long service life.

[0024] Of course, it is not necessary to achieve all the advantages described above when implementing any product of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 The infrared spectrum of the antibacterial halloysite nanotube in the embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] In the following examples and comparative examples of the present application, the preparation method of the anti-aging natural rubber and the antibacterial halloysite nanotube used is as follows:

[0029] I. Preparation of anti-aging natural rubber

[0030] Put 3g of epoxidized natural rubber in 100ml of N,N-dimethylformamide, after fully stirring, pass nitrogen, add 2.5g of 2-mercapto benzimidazole and 0.2g of triethylamine, heat to 80℃ for 12h, collect the product after reaction, and obtain the anti-aging natural rubber.

[0031] The nitrogen and sulfur elements in the epoxidized natural rubber and the anti-aging natural rubber are analyzed by using EA2400II type element analyzer, and it is found that the epoxidized natural rubber does not contain nitrogen and sulfur elements, the content of nitrogen element in the anti-aging natural rubber is 2.2%, and the content of sulfur element is 2.5%, the presence of nitrogen and sulfur elements is due to the ring-opening reaction of the epoxy group in the structure of the epoxidized natural rubber and the mercapto group in the structure of 2-mercapto benzimidazole.

[0032] II. Preparation of antibacterial halloysite nanotubes

[0033] S1: Put 2g of halloysite nanotubes in 120ml of tetrahydrofuran, ultrasonic dispersion for 15min, add 5ml of 1mol / L sodium hydroxide for activation treatment for 3h, add 1.5g of isonicotinic acid, fully stir for 6h, filter, wash, and dry to obtain modified halloysite nanotubes;

[0034] S2: Put 2.5g of modified halloysite nanotubes in 150ml of ethanol, add 2g of 8-bromo-1-octene, heat to reflux for 24h, cool to room temperature, filter, wash, and vacuum dry to obtain antibacterial halloysite nanotubes.

[0035] Using a Fourier infrared spectrometer, the antibacterial halloysite nanotubes are mixed and ground with potassium bromide for tabletting treatment, and infrared spectrum test is performed; Figure 1 It is found that 3065cm -1 is the absorption peak of carbon-hydrogen bond in carbon-carbon double bond, 2932cm -1 is the absorption peak of carbon-hydrogen bond in methylene, 1001cm -1 is the absorption peak of siloxane bond, 3021cm -1 is the stretching vibration peak of carbon-hydrogen bond in quaternary ammonium group, 1456cm -1 is the bending vibration peak of carbon-hydrogen bond in quaternary ammonium group; 3065cm -1 is the absorption peak of carbon-hydrogen bond in carbon-carbon double bond, 3021cm -1 is the stretching vibration peak of carbon-hydrogen bond in quaternary ammonium group, 1456cm -1 is the bending vibration peak of carbon-hydrogen bond in quaternary ammonium group, which indicates that the tertiary amine group on the surface of the modified halloysite nanotubes has undergone quaternization reaction with the active bromine in the structure of 8-bromo-1-octene.

[0036] Example 1

[0037] Preparation of ABS particles

[0038] Step one, 60 parts of ABS resin, 15 parts of anti-aging natural rubber, 3 parts of allyl phosphonic acid diethyl ester, 2 parts of stearic acid, 1 part of ultraviolet absorber UV326, were placed in a high-speed mixer, and after sufficient mixing, a premix was obtained;

[0039] Step two, the premix was placed in a twin-screw extruder, 5 parts of antibacterial halloysite nanotubes and 1 part of dicumyl peroxide were added, the screw speed was set to 150 r / min, the temperature of the first zone of the extruder was 200℃, the temperature of the second zone was 210℃, the temperature of the third zone was 220℃, the temperature of the fourth zone was 230℃, the temperature of the fifth zone was 210℃, and the extrusion temperature was 190℃, and the melt extrusion granulation was carried out, and after cooling to room temperature, ABS particles were obtained.

[0040] Example 2

[0041] Preparation of ABS particles

[0042] Step one, 70 parts of ABS resin, 18 parts of anti-aging natural rubber, 4 parts of triisopropyl phosphate, 3 parts of stearic acid amide, 2 parts of ultraviolet absorber UV328, were placed in a high-speed mixer, and after sufficient mixing, a premix was obtained;

[0043] Step two, the premix was placed in a twin-screw extruder, 7 parts of antibacterial halloysite nanotubes and 1.5 parts of benzoyl peroxide were added, the screw speed was set to 200 r / min, the temperature of the first zone of the extruder was 205℃, the temperature of the second zone was 216℃, the temperature of the third zone was 225℃, the temperature of the fourth zone was 237℃, the temperature of the fifth zone was 214℃, and the extrusion temperature was 196℃, and the melt extrusion granulation was carried out, and after cooling to room temperature, ABS particles were obtained.

[0044] Example 3

[0045] Preparation of ABS particles

[0046] Step one, 80 parts of ABS resin, 20 parts of anti-aging natural rubber, 5 parts of allyl phosphonic acid diethyl ester, 4 parts of stearic acid, 3 parts of ultraviolet absorber UV326, were placed in a high-speed mixer, and after sufficient mixing, a premix was obtained;

[0047] Step two, the premix was placed in a twin-screw extruder, 8 parts of antibacterial halloysite nanotubes and 2 parts of dicumyl peroxide were added, the screw speed was set to 250 r / min, the temperature of the first zone of the extruder was 210℃, the temperature of the second zone was 220℃, the temperature of the third zone was 230℃, the temperature of the fourth zone was 240℃, the temperature of the fifth zone was 220℃, and the extrusion temperature was 200℃, and the melt extrusion granulation was carried out, and after cooling to room temperature, ABS particles were obtained.

[0048] Comparative Example 1

[0049] Preparation of ABS particles

[0050] Step one, 70 parts of ABS resin, 4 parts of triisopropyl phosphate, 3 parts of stearic acid amide, 2 parts of ultraviolet absorber UV328, were placed in a high-speed mixer, and after sufficient mixing, a premix was obtained;

[0051] Step two, the premix was placed in a twin-screw extruder, 7 parts of antibacterial halloysite nanotubes and 1.5 parts of benzoyl peroxide were added, the screw speed was set to 200 r / min, the temperature of the first zone of the extruder was 205℃, the temperature of the second zone was 216℃, the temperature of the third zone was 225℃, the temperature of the fourth zone was 237℃, the temperature of the fifth zone was 214℃, and the extrusion temperature was 196℃, and the melt extrusion granulation was carried out, and after cooling to room temperature, ABS particles were obtained.

[0052] Comparative example 2

[0053] Preparation of ABS particles

[0054] Step one, 70 parts of ABS resin, 18 parts of anti-aging natural rubber, 4 parts of triisopropyl phosphate, 3 parts of stearic acid amide, 2 parts of ultraviolet absorber UV328, were placed in a high-speed mixer, and after sufficient mixing, a premix was obtained;

[0055] Step two, the premix was placed in a twin-screw extruder, 1.5 parts of benzoyl peroxide was added, the screw speed was set to 200 r / min, the temperature of the first zone of the extruder was 205℃, the temperature of the second zone was 216℃, the temperature of the third zone was 225℃, the temperature of the fourth zone was 237℃, the temperature of the fifth zone was 214℃, and the extrusion temperature was 196℃, and the melt extrusion granulation was carried out, and after cooling to room temperature, ABS particles were obtained.

[0056] Comparative example 3

[0057] Preparation of ABS particles

[0058] Step one, 70 parts of ABS resin, 4 parts of triisopropyl phosphate, 3 parts of stearic acid amide, 2 parts of ultraviolet absorber UV328, were placed in a high-speed mixer, and after sufficient mixing, a premix was obtained;

[0059] Step two, the premix was placed in a twin-screw extruder, 1.5 parts of benzoyl peroxide was added, the screw speed was set to 200 r / min, the temperature of the first zone of the extruder was 205℃, the temperature of the second zone was 216℃, the temperature of the third zone was 225℃, the temperature of the fourth zone was 237℃, the temperature of the fifth zone was 214℃, and the extrusion temperature was 196℃, and the melt extrusion granulation was carried out, and after cooling to room temperature, ABS particles were obtained.

[0060] Comparative example 4

[0061] Preparation of ABS particles

[0062] Step one, 70 parts of ABS resin, 18 parts of epoxidized natural rubber, 4 parts of triisopropyl phosphate, 3 parts of stearic acid amide, 2 parts of ultraviolet absorber UV328, were placed in a high-speed mixer, and the premix was obtained after sufficient mixing;

[0063] Step two, the premix was placed in a twin-screw extruder, 7 parts of antibacterial halloysite nanotube and 1.5 parts of benzoyl peroxide were added, the screw speed was set to 200 r / min, the extruder zone one temperature was 205℃, the zone two temperature was 216℃, the zone three temperature was 225℃, the zone four temperature was 237℃, the zone five temperature was 214℃, the extrusion temperature was 196℃, and the melt extrusion granulation was carried out, and after cooling to room temperature, ABS particles were obtained.

[0064] Comparative example 5

[0065] Preparation of ABS particles

[0066] Step one, 70 parts of ABS resin, 18 parts of anti-aging natural rubber, 4 parts of triisopropyl phosphate, 3 parts of stearic acid amide, 2 parts of ultraviolet absorber UV328, were placed in a high-speed mixer, and the premix was obtained after sufficient mixing;

[0067] Step two, the premix was placed in a twin-screw extruder, 7 parts of antibacterial halloysite nanotube and 1.5 parts of benzoyl peroxide were added, the screw speed was set to 200 r / min, the extruder zone one temperature was 205℃, the zone two temperature was 216℃, the zone three temperature was 225℃, the zone four temperature was 237℃, the zone five temperature was 214℃, the extrusion temperature was 196℃, and the melt extrusion granulation was carried out, and after cooling to room temperature, ABS particles were obtained.

[0068] Performance testing

[0069] The ABS particles prepared in examples 1-3, comparative examples 1-5 were pressed into tablets in a flat vulcanizing machine with a molding pressure of 20 MPa, and samples meeting the specifications were prepared. The tensile strength of the samples and the samples treated in an 80℃ aging treatment box for 2d was tested according to standard GB / T1040.3-2006 to determine the tensile strength and aging resistance of the samples; the impact strength of the samples was tested according to standard GB / T1043.1-2008; the bending strength of the samples was tested according to standard GB / T9341-2008; the antibacterial performance of the samples was tested according to standard GB / T31402-2015; the specific test results are shown in the table below:

[0070]

[0071] From the above table, it can be seen that the samples prepared in Examples 1-3 all have excellent tensile strength, impact strength, toughness, and anti-oxidation and antibacterial ability. The samples prepared in Comparative Examples 1 and 3 do not have added anti-aging natural rubber, and have poor anti-aging performance. The sample prepared in Comparative Example 1 has good tensile strength, impact performance and antibacterial performance, but poor toughness. The sample prepared in Comparative Example 3 has poor antibacterial performance and toughness. The samples prepared in Comparative Examples 2 and 3 do not have added antibacterial halloysite nanotubes, and have general tensile strength and impact performance. The sample prepared in Comparative Example 2 has good anti-aging performance, but poor antibacterial performance. The sample prepared in Comparative Example 3 is poor in antibacterial and anti-aging performance. The sample prepared in Comparative Example 4 directly adds epoxidized natural rubber, and has good toughness, impact performance and antibacterial performance, but poor anti-aging performance. The sample prepared in Comparative Example 5 directly adds halloysite nanotubes, and has almost no antibacterial effect, and has poor tensile strength, impact performance and toughness, because the directly added halloysite nanotubes have agglomeration phenomenon in the matrix.

[0072] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled person in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0073] The above is only an example and description of the concept of the present application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace, as long as they do not deviate from the scope defined by the concept of the application, which shall belong to the protection scope of the present application.

Claims

1. An antibacterial ABS particle, characterized in that, The raw materials include the following parts by weight: 60-80 parts ABS resin, 15-20 parts anti-aging natural rubber, 3-5 parts flame retardant, 2-4 parts lubricant, 1-3 parts ultraviolet absorber, 5-8 parts antibacterial halloysite nanotubes, and 1-2 parts initiator; the anti-aging natural rubber is prepared by reacting epoxidized natural rubber with 2-mercaptobenzimidazole; the antibacterial halloysite nanotubes are prepared by reacting halloysite nanotubes with isonicotinic acid and then with 8-bromo-1-octene.

2. The antibacterial ABS particles according to claim 1, characterized in that, The flame retardant is any one of allyl phosphonate diethyl ester and triisopropyl phosphate; the lubricant is any one of stearic acid and stearamide; the ultraviolet absorber is any one of ultraviolet absorber UV326 and ultraviolet absorber UV328; and the initiator is any one of dicumyl peroxide, benzoyl peroxide, and di-tert-butyl peroxide.

3. The antibacterial ABS granules according to claim 1, characterized in that, The preparation method of the anti-aging natural rubber is as follows: Epoxidized natural rubber was placed in N,N-dimethylformamide, stirred thoroughly, and then nitrogen gas was introduced. 2-Mercaptobenzimidazole and a catalyst were added, and the mixture was heated to 80-90℃ and reacted for 12-20 hours. After collecting the product, anti-aging natural rubber was obtained.

4. The antibacterial ABS granules according to claim 3, characterized in that, The catalyst is triethylamine.

5. The antibacterial ABS granules according to claim 1, characterized in that, The method for preparing the antibacterial halloysite nanotubes is as follows: S1: Halloysite nanotubes were placed in tetrahydrofuran and ultrasonically dispersed for 15-20 min. Sodium hydroxide was added for activation treatment for 3-5 h. Isonicotinic acid was added and stirred thoroughly for 6-8 h. After filtration, washing and drying, modified halloysite nanotubes were obtained. S2: Modified halloysite nanotubes were placed in ethanol, 8-bromo-1-octene was added, the mixture was heated to reflux and reacted, cooled to room temperature, filtered, washed, and vacuum dried to obtain antibacterial halloysite nanotubes.

6. The antibacterial ABS granules according to claim 5, characterized in that, In step S1, the concentration of sodium hydroxide is 1-2 mol / L.

7. The antibacterial ABS granules according to claim 5, characterized in that, In step S2, the heating and reflux reaction time is 24-48 hours.

8. A method for preparing antibacterial ABS particles as described in claim 1, characterized in that, The method for preparing the antibacterial ABS particles includes the following steps: Step 1: Place ABS resin, anti-aging natural rubber, flame retardant, lubricant, and UV absorber in a high-speed mixer and mix thoroughly to obtain a premix. Step 2: Place the premixed material in a twin-screw extruder, add antibacterial halloysite nanotubes and an initiator, set the screw speed and temperature of each zone of the twin-screw extruder, and perform melt extrusion granulation. After cooling to room temperature, ABS granules are obtained.

9. The method for preparing antibacterial ABS particles according to claim 8, characterized in that, In step two, the screw speed of the twin-screw extruder is 150-250 r / min; the temperatures of each zone of the twin-screw extruder are as follows: zone one: 200-210℃; zone two: 210-220℃; zone three: 220-230℃; zone four: 230-240℃; zone five: 210-220℃; and the extrusion temperature is 190-200℃.

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