Antibacterial nylon composite material for robot and preparation method of antibacterial nylon composite material
By grafting halogenated amine antibacterial agents onto nylon materials, the problem of easy leaching of antibacterial agents from nylon materials was solved, achieving long-lasting and highly efficient antibacterial properties for robot materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-04-07
AI Technical Summary
In existing nylon materials used in robotic applications, antibacterial agents are easily leached out, resulting in short-lasting antibacterial performance and making it difficult to meet the demand for long-lasting and efficient antibacterial protection.
A halogenated amine antibacterial agent was grafted onto the nylon macromolecular chain using a grafting method, and the precipitation resistance of the halogenated amine antibacterial agent was improved by an amidation reaction, thus preparing an antibacterial nylon composite material.
This achieves long-lasting high antibacterial properties in robot materials, maintaining excellent antibacterial effects.
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of antibacterial material preparation technology, specifically relating to an antibacterial nylon composite material for robots and its preparation method. Background Technology
[0002] With the development of science and technology, the requirements for material performance in robots are becoming increasingly stringent. Currently, robots are expected to encompass multiple dimensions such as lightweight, wear resistance, and impact resistance. Nylon (polyamide resin), due to its high mechanical strength, outstanding fatigue resistance, and low surface friction coefficient, has become the preferred material for robot shells, joint components, and 3D printed parts, while also meeting the requirements of lightweight and durability. Furthermore, endowing robots with antibacterial properties could demonstrate significant advantages and application potential in fields such as medical care and household cleaning, while also preventing bacterial growth during human-robot interaction. In terms of antibacterial properties, halogenated amine antibacterial agents have advantages such as high bactericidal efficiency, renewability, and broad-spectrum antibacterial activity, making them a focus of attention. However, because N-halogenated amines are small molecule compounds, they are easily consumed and dissolved during use, resulting in short-lived antibacterial efficacy. Therefore, how to enable nylon robots to possess long-lasting antibacterial properties has become an urgent problem to be solved. Summary of the Invention
[0003] To address the aforementioned technical problems, this invention provides an antibacterial nylon composite material for robots and its preparation method. By using a grafting method, the exudation of halogenated amine antibacterial agents is reduced, enabling the robot to maintain high antibacterial properties for a long time.
[0004] The technical solution adopted in this invention is as follows: In a first aspect, the present invention provides an antibacterial nylon composite material for robots, comprising the following components based on an alloy content of 100 parts by weight: Nylon 30-60 parts, glass fiber 20-60 parts, toughening agent 0-10 parts, antioxidant 0-3 parts, lubricant 0-3 parts, 1-aminohydantoin hydrochloride 0.5-3 parts, amide condensing agent 0.5-3 parts.
[0005] Furthermore, the nylon includes at least one of PA6, PA66, PA12, and PA6T.
[0006] Furthermore, the toughening agent includes at least one of POE-g-MAH, PE-g-MAH, and SEBS-g-MAH.
[0007] Furthermore, the antioxidant includes at least one of antioxidant 1010, antioxidant 1076, antioxidant TPP, antioxidant 1024, antioxidant 168, antioxidant 1098, and antioxidant 9228.
[0008] Furthermore, the lubricant includes at least one of methanamide, calcium stearate, EMI-200, and polymer wax.
[0009] Furthermore, the amide condensing agent includes at least one of active esters, onium salt condensing agents, and organophosphorus condensing agents.
[0010] Secondly, the present invention provides a method for preparing an antibacterial nylon composite material for robots, comprising the following steps: (1) Nylon, toughening agent, antioxidant, lubricant, 1-aminohydantoin hydrochloride and amide condensing agent are mixed evenly in a high-speed mixer. Then the mixture is placed in the main feed bin of the extruder and the glass fiber is placed in the side feed bin. The mixture in the main feed bin and the glass fiber in the side feed bin are combined at the top hopper of the extruder and enter the extruder. The mixture is melted, dispersed and mixed in the extruder. Finally, it is extruded and pelletized to obtain modified glass fiber reinforced nylon composite masterbatch. (2) The modified glass fiber reinforced nylon composite masterbatch is placed in an injection molding machine and injection molded to obtain robot nylon parts; (3) The robot nylon parts are placed in hypochlorous acid solution for chlorination to obtain antibacterial nylon parts containing N-haloamine antibacterial agent.
[0011] Furthermore, in step (1), the extruder temperature is 240~400℃, and the residence time of the mixture in the extruder is 0.5~2min.
[0012] Furthermore, in step (3), the concentration of the hypochlorous acid solution is 8~15wt%, and the pH is 7.
[0013] Furthermore, the chlorination time in step (3) is 20~40 min.
[0014] The beneficial effects of this invention are as follows: This invention provides an antibacterial nylon composite material for robots and its preparation method. By introducing a halogenated amine antibacterial agent into the nylon system and grafting the halogenated amine antibacterial agent onto the nylon macromolecular chain using an amidation reaction, the leaching resistance of the halogenated amine antibacterial agent is improved, enabling the robot to maintain high antibacterial properties for a long time. Detailed Implementation
[0015] This invention provides an antibacterial nylon composite material for robots and its preparation method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0016] In a first aspect, the present invention provides an antibacterial nylon composite material for robots, comprising the following components in a total content of 100 parts by weight: Nylon 30-60 parts, glass fiber 20-60 parts, toughening agent 0-10 parts, antioxidant 0-3 parts, lubricant 0-3 parts, 1-aminohydantoin hydrochloride 0.5-3 parts, amide condensing agent 0.5-3 parts.
[0017] In the above technical solution, nylon is the main component of the robot parts, and glass fiber can further enhance the mechanical strength and fatigue resistance of nylon; 1-aminohydantoin hydrochloride is an antibacterial agent, giving nylon antibacterial properties; amide condensing agent is a reaction aid, promoting the amidation reaction between nylon and 1-aminohydantoin hydrochloride.
[0018] In some embodiments of the present invention, the nylon mentioned above includes at least one of PA6, PA66, PA12, and PA6T.
[0019] In some embodiments of the present invention, the toughening agent includes at least one of POE-g-MAH, PE-g-MAH, and SEBS-g-MAH.
[0020] In some embodiments of the present invention, the antioxidants include at least one of antioxidant 1010, antioxidant 1076, antioxidant TPP, antioxidant 1024, antioxidant 168, antioxidant 1098, and antioxidant 9228.
[0021] In some embodiments of the present invention, the above-mentioned lubricant includes at least one of methanamide, calcium stearate, EMI-200, and polymer wax.
[0022] In some embodiments of the present invention, the aforementioned amide condensing agent includes at least one of an active ester, an onium salt condensing agent, and an organophosphorus condensing agent. Specifically, the active ester includes p-nitrobenzene ester; the onium salt condensing agent is at least one of HATU, HBTU, HCTU, TBTU, TSTU, and TNTU; and the organophosphorus condensing agent is at least one of diphenylphosphine chloride (DPP-Cl), diethyl cyanophosphate (DECP), diphenyl azidophosphate (DPPA), thiodimethylphosphoazide (MPTA), and bis(2-oxo-3-azoloalkyl)phosphine chloride (BOP-Cl).
[0023] Secondly, the present invention provides a method for preparing an antibacterial nylon composite material for robots, comprising the following steps: (1) Nylon, toughening agent, antioxidant, lubricant, 1-aminohydantoin hydrochloride and amide condensing agent are mixed evenly in a high-speed mixer. Then the mixture is placed in the main feed bin of the extruder and the glass fiber is placed in the side feed bin. The mixture in the main feed bin and the glass fiber in the side feed bin are combined at the top hopper of the extruder and enter the extruder. They are melted, dispersed and mixed in the extruder. Finally, they are extruded and pelletized to obtain modified glass fiber reinforced nylon composite masterbatch. (2) The modified glass fiber reinforced nylon composite masterbatch is placed in an injection molding machine and injection molded to obtain robot nylon parts; (3) The robot nylon parts are placed in hypochlorous acid solution for chlorination to obtain antibacterial nylon parts containing N-haloamine antibacterial agent.
[0024] In some embodiments of the present invention, the extruder temperature in step (1) is 240~400°C, and the residence time of the mixture in the extruder is 0.5~2 min.
[0025] In the above technical solution, by controlling the extrusion temperature and extrusion time, not only is the melting of the mixture guaranteed, but also the amidation reaction of nylon and 1-aminohydantoin hydrochloride is guaranteed, so that the antibacterial agent can be grafted onto the nylon macromolecule.
[0026] In some embodiments of the present invention, the concentration of hypochlorous acid solution in step (3) is 8~15wt%, pH=7, and the chlorination time is 20~40min.
[0027] Example 1 This embodiment provides an antibacterial nylon composite material for robots, and the preparation process is as follows: (1) 55 parts of nylon PA66, 4 parts of toughening agent POE-g-MAH, 2.5 parts of antioxidant 1010, 2.5 parts of lubricant mesoamide, 3 parts of 1-aminohydantoin hydrochloride, and 3 parts of amide condensing agent p-nitrobenzene were placed in a high-speed mixer and mixed evenly at room temperature. The mixing speed was 300 r / min and the time was 3 min. Then the mixture was placed in the main feed bin of the extruder and 30 parts of glass fiber were placed in the side feed bin. The mixture in the main feed bin and the glass fiber in the side feed bin were combined at the collection hopper above the extruder and entered the extruder. The mixture was melted, dispersed and mixed in the extruder. The melting temperature was 280℃ and the residence time was 2 min. Finally, it was extruded and pelletized to obtain modified glass fiber reinforced nylon composite masterbatch. (2) The modified glass fiber reinforced nylon composite masterbatch is placed in an injection molding machine and injection molded to obtain robot nylon parts; (3) The robot nylon parts were placed in a hypochlorous acid solution with a concentration of 10wt% and a pH of neutral for chlorination for 30 minutes to obtain antibacterial nylon parts containing N-haloamine antibacterial agent.
[0028] Example 2 This embodiment provides an antibacterial nylon composite material for robots, and the preparation process is as follows: (1) 38 parts of nylon PA6, 4 parts of toughening agent PE-g-MAH, 2 parts of antioxidant TPP, 2 parts of lubricant calcium stearate, 2 parts of 1-aminohydantoin hydrochloride, and 2 parts of onium salt condensing agent HATU were placed in a high-speed mixer and mixed evenly at room temperature. The mixing speed was 200 r / min and the time was 5 min. Then the mixture was placed in the main feed bin of the extruder and 50 parts of glass fiber were placed in the side feed bin. The mixture in the main feed bin and the glass fiber in the side feed bin were combined at the collection hopper above the extruder and entered the extruder. The mixture was melted, dispersed and mixed in the extruder. The melting temperature was 300℃ and the residence time was 1.5 min. Finally, it was extruded and pelletized to obtain modified glass fiber reinforced nylon composite masterbatch. (2) The modified glass fiber reinforced nylon composite masterbatch is placed in an injection molding machine and injection molded to obtain robot nylon parts; (3) The robot nylon parts were placed in a hypochlorous acid solution with a concentration of 12wt% and a pH of neutral for 25 minutes to obtain antibacterial nylon parts containing N-haloamine antibacterial agent.
[0029] Example 3 This embodiment provides an antibacterial nylon composite material for robots, and the preparation process is as follows: (1) 34 parts of nylon PA66, 1 part of toughening agent POE-g-MAH, 0.5 parts of antioxidant 1010, 0.5 parts of lubricant mesoamide, 3 parts of 1-aminohydantoin hydrochloride, and 1 part of amide condensing agent p-nitrobenzene were placed in a high-speed mixer and mixed evenly at room temperature. The mixing speed was 300 r / min and the time was 3 min. Then the mixture was placed in the main feed bin of the extruder and 60 parts of glass fiber were placed in the side feed bin. The mixture in the main feed bin and the glass fiber in the side feed bin were combined at the collection hopper above the extruder and entered the extruder. The mixture was melted, dispersed and mixed in the extruder. The melting temperature was 400℃ and the residence time was 1 min. Finally, it was extruded and pelletized to obtain modified glass fiber reinforced nylon composite masterbatch. (2) The modified glass fiber reinforced nylon composite masterbatch is placed in an injection molding machine and injection molded to obtain robot nylon parts; (3) The robot nylon parts were placed in a hypochlorous acid solution with a concentration of 15wt% and a pH of neutral for 20 minutes to obtain antibacterial nylon parts containing N-haloamine antibacterial agent.
[0030] Example 4 This embodiment prepares an antibacterial nylon composite material for robots. The difference between this embodiment and Example 3 is that the amount of 1-aminohydantoin hydrochloride added is 1 part, and the amount of nylon PA66 added is 36 parts. Other preparation processes and parameters are the same as in Example 3.
[0031] Comparative Example 1 This comparative example prepares an antibacterial nylon composite material for robots. The difference between this comparative example and Example 3 is that the amide condensing agent p-nitrobenzene ester was not added in this comparative example. Other preparation processes and parameters are the same as in Example 3.
[0032] The nylon composite materials prepared in Examples 1-4 and Comparative Example 1 were subjected to antibacterial tests. The tests were performed according to the standard GB / T20944.2-2007. The test results are shown in Table 1 below.
[0033] Table 1. Results of antibacterial performance test Analysis of the antibacterial performance test results in Table 1 above shows that the antibacterial nylon parts of Examples 1-3 of this invention have an antibacterial rate of over 99%, exhibiting good antibacterial effects. In Example 4, the amount of antibacterial agent added was small, resulting in a lower final antibacterial performance. In Comparative Example 1, the antibacterial agent was added directly without the addition of an amide condensing agent, resulting in significantly lower antibacterial performance. This is because the antibacterial agent was not grafted onto the macromolecular nylon. During extrusion granulation or subsequent chlorination, the small molecule antibacterial agent precipitated out, leading to partial loss and thus reducing its antibacterial properties. In the subsequent use of the antibacterial nylon parts prepared in Comparative Example 1, the small molecule antibacterial agent continued to precipitate out and be lost, causing the antibacterial performance to gradually weaken and unable to maintain a long-term high antibacterial performance.
[0034] It should be noted that any parts not mentioned in this invention can be achieved by using or referencing existing technologies.
[0035] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. An antibacterial nylon composite material for robots, characterized in that, Based on a total content of 100 parts by weight, it includes the following components: Nylon 30-60 parts, glass fiber 20-60 parts, toughening agent 0-10 parts, antioxidant 0-3 parts, lubricant 0-3 parts, 1-aminohydantoin hydrochloride 0.5-3 parts, amide condensing agent 0.5-3 parts.
2. The antibacterial nylon composite material for robots according to claim 1, characterized in that, The nylon includes at least one of PA6, PA66, PA12, and PA6T.
3. The antibacterial nylon composite material for robots according to claim 1, characterized in that, The toughening agent includes at least one of POE-g-MAH, PE-g-MAH, and SEBS-g-MAH.
4. The antibacterial nylon composite material for robots according to claim 1, characterized in that, The antioxidants include at least one of antioxidant 1010, antioxidant 1076, antioxidant TPP, antioxidant 1024, antioxidant 168, antioxidant 1098, and antioxidant 9228.
5. The antibacterial nylon composite material for robots according to claim 1, characterized in that, The lubricant includes at least one of the following: mesoamide, calcium stearate, EMI-200, and polymer wax.
6. The antibacterial nylon composite material for robots according to claim 1, characterized in that, The amide condensing agent includes at least one of active esters, onium salt condensing agents, and organophosphorus condensing agents.
7. A method for preparing an antibacterial nylon composite material for robots according to any one of claims 1-6, characterized in that, Including the following steps: (1) Nylon, toughening agent, antioxidant, lubricant, 1-aminohydantoin hydrochloride and amide condensing agent are mixed evenly in a high-speed mixer. Then the mixture is placed in the main feed bin of the extruder and the glass fiber is placed in the side feed bin. The mixture in the main feed bin and the glass fiber in the side feed bin are combined at the top hopper of the extruder and enter the extruder. The mixture is melted, dispersed and mixed in the extruder. Finally, it is extruded and pelletized to obtain modified glass fiber reinforced nylon composite masterbatch. (2) The modified glass fiber reinforced nylon composite masterbatch is placed in an injection molding machine and injection molded to obtain robot nylon parts; (3) The robot nylon parts are placed in hypochlorous acid solution for chlorination to obtain antibacterial nylon parts containing N-haloamine antibacterial agent.
8. The method for preparing an antibacterial nylon composite material for robots according to claim 7, characterized in that, In step (1), the extruder temperature is 240~400℃, and the residence time of the mixture in the extruder is 0.5~2min.
9. The method for preparing an antibacterial nylon composite material for robots according to claim 7, characterized in that, In step (3), the concentration of hypochlorous acid solution is 8~15wt%, and the pH is 7.
10. The method for preparing an antibacterial nylon composite material for robots according to claim 7, characterized in that, The chlorination time in step (3) is 20~40 min.