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A method for preparing pa6/mesoporous nanomaterials@ag composite antibacterial fibers based on in-situ polymerization

A nanomaterial and composite antibacterial technology, which is applied in the field of preparation of composite antibacterial fibers, can solve problems such as low efficiency, complex process methods, environmental pollution, etc., and achieve the effects of broad application prospects, environmental friendliness, and stable and lasting antibacterial properties.

Active Publication Date: 2020-11-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only needs to add polythiol compounds for reduction and modification, but also introduces organic solvents. The process method is relatively complicated, the efficiency is low, and it will bring environmental pollution problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Dissolve 2g of silver acetate in 60mL of water to form a silver acetate solution, add 35g of mesoporous silica and 0.5g of polyvinylpyrrolidone (PVP) to the solution, form a suspension by ultrasonic stirring, and add it to a 5L polymerization kettle Mesoporous nanomaterials loaded with silver acetate were prepared by applying vacuum negative pressure.

[0022] (2) Add 1.5 kg of caprolactam into the above reaction kettle, then raise the temperature to 240° C., and react at this temperature for 2 hours. After removing water, the whole reaction system continued to heat up to 260°C, reacted for 2.5 hours, and prepared PA6 / mesoporous silica@Ag composite antibacterial resin in one step.

[0023] (3) Granulate and dry PA6 / mesoporous silica@Ag composite antibacterial resin in step (2), and melt-spin with polyamide 6 resin at a mass ratio of 40:60 at a spinning speed of 600m / min Spinning, winding and stretching to obtain PA6 / mesoporous silica@Ag composite antibacterial fibe...

Embodiment 2

[0026] (1) Dissolve 2.5g silver acetate in 70mL water to form a silver acetate solution, add 40g halloysite nanotubes and 0.6g polyvinylpyrrolidone (PVP) to the solution, form a suspension by ultrasonic stirring, add it to 5L polymerization The mesoporous nanomaterials loaded with silver acetate were prepared in the autoclave and applied vacuum negative pressure.

[0027] (2) Add 1.5 kg of caprolactam into the above reaction kettle, then raise the temperature to 250° C., and react at this temperature for 2.5 hours. After removing water, the whole reaction system continued to heat up to 270°C, and reacted for 2 hours to complete the preparation of PA6 / halloysite nanotube@Ag composite antibacterial resin in one step.

[0028] (3) Granulate and dry PA6 / halloysite nanotube@Ag composite antibacterial resin in step (2), and melt-spin with polyamide 6 resin at a mass ratio of 50:50 at a spinning speed of 700m / min Spinning, winding and stretching to obtain PA6 / Hallotysite nanotube@Ag...

Embodiment 3

[0031] (1) Dissolve 3g of silver acetate in 65mL of water to form a silver acetate solution, add 45g of mesoporous titanium dioxide and 0.5g of polyvinylpyrrolidone (PVP) to the solution, form a suspension by ultrasonic stirring, add it to a 5L polymerization kettle and Preparation of mesoporous nanomaterials loaded with silver acetate by applying vacuum negative pressure.

[0032] (2) Add 1.5 kg of caprolactam into the above reaction kettle, then raise the temperature to 245° C., and react at this temperature for 2 hours. After removing water, the whole reaction system continued to heat up to 265°C and reacted for 4 hours to complete the preparation of PA6 / mesoporous titanium dioxide@Ag composite antibacterial resin in one step.

[0033] (3) Granulate and dry the PA6 / mesoporous titanium dioxide@Ag composite antibacterial resin in step (2), melt-spin with polyamide 6 resin at a mass ratio of 50:50, and spin at a spinning speed of 800m / min Winding and stretching to obtain PA6 / ...

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Abstract

The invention relates to a method for preparing a PA6 (polyamide 6) / mesoporous nanometer material@Ag (silver) composite antibacterial fiber based on an in-situ polymerizing method. The method comprises the following steps of dissolving silver acetate in water, adding mesoporous inorganic nanoparticles and PVP (polyvinyl pyrrolidone), stirring by ultrasonic waves to form a turbid liquid, and applying vacuum negative pressure, so as to obtain the mesoporous nanometer material loaded with the silver acetate; adding caprolactam, performing loop-opening reaction, removing water, and polycondensing,so as to obtain the PA6 / mesoporous nanometer material@Ag composite antibacterial resin; granulating and drying, melting with the PA6 resin, and spinning, so as to obtain the PA6 / mesoporous nanometermaterial@Ag composite antibacterial fiber. The method has the advantages that by adopting the antibacterial functional medium assembly and functional PA6 in-situ polymerizing method, when the antibacterial object component is added into the PA6 main body, the adding amount is large, the dispersing is uniform, the operation is simple, the efficiency is high, and the cost is low; the processing andapplication range is broad, the organic solvent and other chemical matters are not introduced, the environment-friendly effect is realized, and the application prospect is broad.

Description

technical field [0001] The invention belongs to the field of preparation of composite antibacterial fibers, in particular to a method for preparing PA6 / mesoporous nanomaterial@Ag composite antibacterial fibers based on an in-situ polymerization method. Background technique [0002] Today's social environment is seriously polluted, the ecological environment is gradually deteriorating, and special living microenvironments such as various confined spaces have accelerated the development and utilization of functional protective textiles. At present, ordinary textile fibers themselves do not have antibacterial ability, and under certain conditions, they will provide an environment for bacteria to survive and reproduce, threatening human health. The main method to solve the antibacterial problem of fibers is to introduce antibacterial agents (including organic antibacterial agents, organometallic antibacterial agents, compound antibacterial agents, nano-metal antibacterial agents...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08K3/08C08K7/26C08K7/24C08G69/14
CPCC08G69/14C08K2003/0806C08K2201/011C08L77/02C08L2205/025C08L2205/16C08K7/26C08K3/08C08K7/24
Inventor 朱美芳张杨凯相恒学胡泽旭
Owner DONGHUA UNIV
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