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Preparation method of composite fiber membrane for improving loading stability of silver nanoparticles

A composite fiber membrane and silver nanoparticle technology, applied in the field of materials, can solve the problems of high silver particle agglomeration and shedding rate, which limit the application of silver nanocomposites, and achieve controllable shape, high axial strength, and simple preparation process Effect

Pending Publication Date: 2021-01-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for preparing a composite fiber membrane that improves the loading stability of silver nanoparticles, which can effectively solve the disadvantages of the agglomeration and high shedding rate of silver particles in the material prepared by the traditional method in the actual application process proposed in the above-mentioned background technology, Issues Limiting the Applications of Silver Nanocomposites

Method used

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  • Preparation method of composite fiber membrane for improving loading stability of silver nanoparticles
  • Preparation method of composite fiber membrane for improving loading stability of silver nanoparticles
  • Preparation method of composite fiber membrane for improving loading stability of silver nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: as figure 1 , 4 As shown in -6, the present invention provides a technical solution, the preparation of mercapto-functionalized graphene oxide: add 0.1gPAN in 10mlDMF, magnetically stir for 30min until PAN dissolves, ultrasonically disperse 0.02g graphene oxide, and the ultrasonic time is 30min;

[0035] Add 0.0224g of cysteamine hydrochloride to dissolve it ultrasonically, add 0.0012g of DMAP, and finally add 0.0398g of DCC after dissolving, and carry out esterification reaction at room temperature for 4 hours with low-speed magnetic stirring;

[0036] According to the above-mentioned technical scheme, DMF is in anhydrous state, and is stirred by a glass rod during ultrasonic dispersion, and is operated under an ice bath state.

[0037] According to the above technical solution, the DMAP ratio is nCH / nDMAP=2:1, and the DCC ratio is nCH / nDCC=1:6.18.

[0038] After the reaction is completed, the liquid is suction-filtered, and the filtrate is washed with ...

Embodiment 2

[0045] Embodiment 2: as figure 2 As shown, the preparation of AgNPs@PAN by in situ reduction method: First, disperse 0.1g PVP in 10gDMF with magnetic stirring, add 0.02gAgNO3, put the mixed solution in an oil bath at 60°C for 6h, and then pour it into the obtained orange solution Add 1g of PAN (10wt%) and magnetically stir for 24 hours at room temperature to obtain a uniform and stable precursor solution;

[0046] The electrospinning parameters are controlled as follows: the injector push speed is maintained at 0.48ml / h, the distance from the needle to the collector is 20cm, the voltage is 21kv, the inner diameter of the stainless steel needle is 0.6mm, the ambient temperature and relative humidity are 25±2°C and 40± 5%, dried in a vacuum oven at 60°C for 6h.

[0047] The AgNPs@PAN nanofiber membrane prepared by in situ reduction method was characterized as follows: figure 2 .

[0048] The above 20*20mm2 membrane material was subjected to a stability test at different pH,...

Embodiment 3

[0050]Example 3: Preparation of AgNPs@PAN by ultraviolet reduction method: disperse 1gPAN in 10gDMF, stir magnetically for 24h, and obtain a homogeneous PAN solution with a concentration of 10wt%;

[0051] The electrospinning parameters are controlled as follows: the injector push speed is maintained at 0.72ml / h, the distance from the needle to the collector is 18cm, the voltage is 21kv, the inner diameter of the stainless steel needle is 0.67mm, and the ambient temperature and relative humidity are 25±2°C and 40± 5%.

[0052] After spinning, cut the membrane into 20*20mm2, soak it in AgNO3 (2wt%) solution for 24 hours, take it out, wash it with ultrapure water for 2-3 times, and dry it in a freeze dryer for 24 hours. After drying, take out the film, spread it on a sterile black plastic bag, and restore it by UV sterilizing lamp irradiation. Finally, the membrane was washed 2-3 times, and dried in a vacuum oven at 60° C. for 6 hours.

[0053] The AgNPs@PAN nanofiber membrane...

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Abstract

The invention discloses a preparation method of a composite fiber membrane for improving loading stability of silver nanoparticles. The preparation method comprises the following steps of S1, preparing sulfydryl functionalized graphene oxide; S2, preparing a sulfydryl functionalized graphene oxide doped PAN nanofiber membrane by using an electrostatic spinning technology; and S3, soaking the sulfydryl functionalized graphene oxide doped PAN nanofiber membrane into a nano-silver colloidal solution to obtain the composite fiber membrane loaded with the nano-silver particles on the surface. The composite fiber membrane is scientific and reasonable in structure, safe and convenient to use, simple in preparation process and simple in required instrument and equipment, and the process environment required by preparation is normal temperature and normal pressure; and a prepared nanofiber membrane material is compared with membrane materials prepared by in-situ reduction and subsequent compounding methods on the aspect of the nano silver shedding rate under different PHs, temperatures and stirring speeds, and data shows that the shedding rate of the membrane material prepared by the methodis reduced by 60.81% compared with the shedding rate of the materials synthesized by the two traditional methods.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a method for preparing a composite fiber membrane for improving the loading stability of silver nanoparticles. Background technique [0002] Silver is an effective antibacterial agent, nano silver, is the use of cutting-edge nanotechnology to nano silver, silver, the bactericidal ability in the nano state has produced a qualitative leap, a very small amount of nano silver can produce a strong bactericidal effect, nano Silver particles directly enter the bacteria and combine with oxygen metabolizing enzyme (-SH) to suffocate the bacteria to death. It can kill most bacteria, fungi, molds, spores and other microorganisms that come into contact with it. According to research statistics, a small amount Nano-silver can kill more than 650 kinds of bacteria in a few minutes. It has broad-spectrum sterilization and no drug resistance. It can promote wound healing, cell growth and repair...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D01D5/00D01F1/10D01F6/54D04H1/43D04H1/728D06M101/28
CPCD06M11/83D01F6/54D01F1/10D04H1/43D04H1/728D01D5/003D01D5/0092D01D5/0069D01D5/0061D06M2101/28
Inventor 苑春刚李治穷
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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