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Macroscopic quantity preparation method for macromolecule-based silver-loaded composite nanofiber membrane

A nanofiber membrane and macro-quantity technology, which is applied in fiber treatment, spinning solution preparation, textiles and papermaking, etc., can solve the problems of poor mechanical properties of composite fiber membranes, inability to mass-produce, unstable antibacterial performance, etc., and achieve thermal The effect of good stability, stable size, and excellent antibacterial performance

Inactive Publication Date: 2015-09-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a method for macromolecularly preparing polymer-based silver-loaded composite nanofiber membranes by using an in-situ synthesis method, so as to solve the problem of large silver-loaded particle size, easy agglomeration, and problems in the prior art. Uneven distribution, unstable antibacterial properties, and poor mechanical properties of composite fiber membranes, which cannot be mass-produced

Method used

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  • Macroscopic quantity preparation method for macromolecule-based silver-loaded composite nanofiber membrane
  • Macroscopic quantity preparation method for macromolecule-based silver-loaded composite nanofiber membrane
  • Macroscopic quantity preparation method for macromolecule-based silver-loaded composite nanofiber membrane

Examples

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Comparison scheme
Effect test

Embodiment 1

[0054] A kind of macro preparation method of PA / Ag composite nanofibrous film, comprises steps as follows:

[0055] (1) Preparation of spinning solution

[0056] Mix 146.7g of formic acid aqueous solution with a concentration of 88wt% and 293.4g of glacial acetic acid evenly, add 60g of nylon 6 particles under stirring, stir until nylon 6 is completely dissolved, and then add 0.6g of AgNO 3 Stir in the dark until the AgNO 3 Dissolve completely to obtain a colorless and clear spinning solution;

[0057] In the spinning solution, the concentration of nylon 6 is 12wt%, and the concentration of formic acid is 25.8wt%; formic acid aqueous solution: glacial acetic acid=1:2, mass ratio; AgNO 3 The added amount accounts for 1% of the mass of nylon 6;

[0058] (2) Electrospinning

[0059] Use the electrospinning equipment Nano Spider NS LAB 500 of Elmarco Company to carry out electrospinning, pour the spinning solution prepared in step (1) into the spinning tank, and use a rotating...

Embodiment 2

[0065] As described in Example 1, the difference is:

[0066] Concentration in step (1) is 145g formic acid aqueous solution of 88wt%, glacial acetic acid 290g, formic acid aqueous solution: glacial acetic acid=1:2, mass ratio, the quality of nylon 6 is 65g;

[0067] In the spinning solution, the concentration of nylon 6 is 13wt%, the concentration of formic acid is 25.5wt%; AgNO 3 The mass of is 0.65g, accounting for 1% of the mass of nylon 6;

[0068] Step (2) is with embodiment 1;

[0069] Step (3) is the same as in Example 1.

[0070] In the composite nanofiber membrane precursor obtained in step (2) of this example, some AgNO 3 reduced to nano-Ag, as attached image 3 shown.

[0071] The SEM photo of the PA / Ag composite nanofibers obtained in this embodiment is as follows figure 2 shown by figure 2 It can be seen that the PA / Ag composite nanofibers have a uniform diameter, with an average diameter of about 90nm. The nano-Ag particles in the fiber are evenly dist...

Embodiment 3

[0074] As described in Example 1, the difference is:

[0075] In step (1), the formic acid aqueous solution with concentration of 88wt% is 145g, glacial acetic acid 290g, formic acid aqueous solution: glacial acetic acid=1:2, mass ratio, and the quality of nylon 6 is 65g;

[0076] In the spinning solution, the concentration of nylon 6 is 13wt%, the concentration of formic acid is 25.5wt%; AgNO 3 The mass of is 0.78g, accounting for 1.2% of the mass of nylon 6;

[0077] Step (2) is with embodiment 1;

[0078] In step (3), the composite nanofiber membrane precursor obtained in step (2) is irradiated with ultraviolet light for 1 hour, wherein the intensity of ultraviolet light is 30w, and the wavelength is 254nm. During the irradiation process, the fiber film slowly changed from white to yellowish brown, indicating the formation of nano-Ag particles.

[0079] The diameter of the PA / Ag composite nanofiber obtained in this example is uniform, with an average diameter of 90 nm. ...

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Abstract

The invention relates to a macroscopic quantity preparation method for a macromolecule-based silver-loaded composite nanofiber membrane. The method comprises the steps of a spinning solution preparation step, an electrostatic spinning step and precursor reduction. According to the prepared macromolecule-based silver-loaded composite nanofiber membrane, the sizes of silver nanoparticles are stable, obvious agglomeration does not exist, and the distribution is even; the macromolecule-based silver-loaded composite nanofiber membrane has the advantages that the fiber length-diameter ratio is big, and the specific surface area is higher; therefore, the contact ratio of nano-silver and noxious bacteria in fiber is greatly increased, and the antibacterial effect of the nano-silver can be exerted to the maximum extent.

Description

technical field [0001] The invention relates to a macromolecule-based silver-loaded composite nanofiber film preparation method, which belongs to the technical field of nanomaterial preparation. Background technique [0002] Due to the surface effect, quantum size effect and other characteristics of nano powder materials, the material itself usually has special properties different from its macroscopic substances. For a long time, nano-silver has been used as an efficient antibacterial material because of its excellent chemical stability and catalytic activity. It has the characteristics of broad-spectrum antibacterial, safe and stable, and does not produce drug resistance. For polymer-based silver-loaded composite nanofibers, due to the characteristics of large specific surface area and high porosity of nanofibers, the contact ratio between nanoparticles and harmful bacteria in the fibers is greatly increased, and the antibacterial effect of nanosilver can be maximized. At...

Claims

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Application Information

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IPC IPC(8): D04H1/4382D04H1/728D01D1/02D01D5/00D06C7/00
Inventor 焦秀玲杨杰陈代荣
Owner SHANDONG UNIV
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