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Antibacterial nylon 6 containing guanidyl group and preparation method thereof

A nylon and group technology, applied in the field of antibacterial material preparation, can solve the problems of poor heat resistance and inability to meet the processing conditions of thermoplastic materials, and achieve the effects of simple and convenient operation, prevention of bacterial drug resistance, and lasting effect

Active Publication Date: 2022-03-15
HANGZHOU JUHESHUN NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of the above use organic compounds (chitosan, ammonium salt and haloamine, etc.) as antibacterial agents. The advantage is that a small amount of addition can achieve high sterilization efficiency, but there is a shortcoming of poor heat resistance, so it cannot be used. Meet the processing conditions of thermoplastic materials, most of these antibacterial agents are only used for surface modification

Method used

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  • Antibacterial nylon 6 containing guanidyl group and preparation method thereof
  • Antibacterial nylon 6 containing guanidyl group and preparation method thereof
  • Antibacterial nylon 6 containing guanidyl group and preparation method thereof

Examples

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Effect test

preparation example Construction

[0039]Specifically, the preparation method comprises: adding caprolactam, deionized water, concentrated phosphoric acid and 6-guanidinohexanoic acid to 100% by mass percentage: (1-2%): (1-3%): (0.8-5.0 %) into the reaction device, heat up in a nitrogen atmosphere and react for a preset time, then vacuumize to carry out a reduced-pressure compression polymerization reaction, and finally end the reaction, pour the melt out and cool it to shape, and the antibacterial nylon 6 is obtained.

[0040] The preset time for the temperature rise reaction includes: under the reflux condition of the condenser tube, after the preset time of reaction at the stirring speed of 120-150r / min and 250-260°C, the temperature of the polymerization reaction system is raised to 270-280°C, and the stirring speed is Adjust it to 250-300r / min, change the condenser tube to a vacuum device, and turn off the nitrogen.

[0041] The preset reaction time is preferably 3-4 hours.

[0042] The time for the reduc...

Embodiment 1

[0045] A kind of antibacterial nylon 6 containing guanidine group, prepared through the following steps:

[0046] After setting up the reaction device, feed nitrogen into the device as a protective gas, so that the reaction is in a continuous nitrogen flow. After ventilating for 10 to 15 minutes, add the medicines weighed in proportion to the device, caprolactam, deionized water, concentrated phosphoric acid and 6 -Guanidinohexanoic acid (infrared spectrum such as figure 2 Shown) the mass percent is 100%:1.5%:2%:1%. The ring-opening reaction of caprolactam is carried out under the conditions of reflux in the condenser tube, stirring (120-150 r / min) and reaction temperature (250-260° C.). After 3-4 hours, raise the temperature of the polymerization reaction system (270-280°C), increase the stirring speed (250-300r / min), change the condenser tube to a vacuum device, turn off the nitrogen, and vacuum the reaction system to decompress The polycondensation reaction takes 10 to 3...

Embodiment 2-3

[0053] An antibacterial nylon 6 containing a guanidino group, the difference compared with Example 1 is that the amount of 6-guanidinohexanoic acid added is as shown in Table 1. Others are substantially the same as in Embodiment 1, and will not be repeated here.

[0054] Preparation conditions and bactericidal rate of table 1 embodiment 1-3 and comparative examples

[0055]

[0056] It can be seen from Table 1 that with the increase of the dosage of 6-guanidine hexanoic acid, the sterilization rate of antibacterial nylon gradually increased, but due to the access of 6-guanidine hexanoic acid, the intrinsic viscosity of antibacterial nylon was affected to a certain extent. The more the amount of 6-guanidinohexanoic acid is used, the lower the intrinsic viscosity and the lower the tensile strength, but it can still meet the application requirements. If 6-guanidinohexanoic acid is not added to the polymerization system, the resulting nylon has higher intrinsic viscosity and t...

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Abstract

The invention provides antibacterial nylon 6 containing guanidyl groups and a preparation method of the antibacterial nylon 6. According to the antibacterial nylon 6, an organic small molecule guanidine salt compound is modified, and a 6-guanidino hexanoic acid antibacterial agent which has relatively strong interaction with nylon is developed. 6-guanidino hexanoic acid has an active reactive group and can be directly copolymerized and grafted into a nylon polymer chain, and the antibacterial agent not only can have certain binding capacity with a nylon matrix, but also can be uniformly distributed in the nylon matrix, and can effectively prevent the generation of bacterial drug resistance so as to obtain a better antibacterial effect. The invention provides an effective way for the novel structure and the preparation method of the antibacterial nylon 6, and the antibacterial nylon 6 can be widely used for preparing antibacterial fibers, antibacterial films, antibacterial engineering plastics and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of antibacterial materials, in particular to an antibacterial nylon 6 containing a guanidine group and a preparation method thereof. Background technique [0002] As a commonly used engineering plastic, polyamide (nylon) has excellent physical and chemical properties such as high mechanical strength, good electrical properties, wear resistance, oil resistance, weak acid resistance, weak alkali and weak polar organic solvents, and good processing fluidity. , has been widely used in the fields of construction, automobile, communication, packaging, personal care and fabrics. When nylon materials are used in food packaging and biomedical fields (medical sutures, medical catheters, bone tissue scaffolds and dialysis membranes, etc.), their antibacterial properties have received high attention. Therefore, the research and development of nylon products with antibacterial properties is of great signi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/14C08G69/16
CPCC08G69/14C08G69/16Y02A50/30
Inventor 王栋王雯雯李晓光周鹏程易礼婷严忠孙权李佳囡
Owner HANGZHOU JUHESHUN NEW MATERIAL CO LTD
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