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Preparation method of antibacterial nanofibers

A technology of nanofibers and cellulose acetate, applied in fiber treatment, artificial filaments made of cellulose derivatives, fiber chemical characteristics, etc., can solve the problems of electrospinning fiber diameter influence and uncontrollability, and achieve low cost , simple operation, good application prospects

Inactive Publication Date: 2015-01-28
吴江中天喷织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defect that the diameter of the electrospun fiber is greatly affected by the spinning solution and cannot be controlled in the prior art, the present invention proposes a cellulose acetate-based electrospinning solution that is simple to operate and can better control the diameter of the spinning fiber Method for preparing antibacterial nanofibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Taking mass as the unit, 6 parts of acetone, 1 part of dimethylacetamide and 0.5 part of water are used as raw materials, mixed and configured as a solvent, after adding cellulose acetate particles and silver nitrate crystals, slowly heated at a heating rate of 4 °C until Stir at 60°C for 120 minutes to fully dissolve the cellulose acetate particles to obtain a composite cellulose acetate solution containing 1wt% silver nitrate, then add 1wt% ammonium bicarbonate and stir to easily double the expansion. The concentration of cellulose acetate in the solution is 10wt%.

[0022] The above solution was electrospun at a spinning speed of 0.6ml / h and a voltage of 15kV. The jet flow formed by the spinning solution was of average stability. It is difficult to form electrospun fibers. The applicant believes that the solubility of silver nitrate in the composite cellulose acetate solution is not good, and the dispersion in the composite cellulose acetate solution is uneven, resu...

Embodiment 2

[0025] Taking mass as unit, 9 parts of acetone, 3 parts of dimethylacetamide and 2 parts of water are used as raw materials, mixed and configured as a solvent, after adding cellulose acetate particles and silver nitrate crystals, slowly heated at a heating rate of 2 °C until Stir at 80°C for 100 minutes to fully dissolve the cellulose acetate particles to obtain a composite cellulose acetate solution containing 3wt% silver nitrate, then add 2wt% ammonium bicarbonate and stir to easily expand 1.5 times. The concentration of cellulose acetate in the solution is 10wt%.

[0026] The above solution is electrospun at a spinning speed of 0.6ml / h and a voltage of 15kV. The jet flow formed by the spinning solution is more stable, and there will be no more droplets in the above-mentioned Example 1 that are not fully drawn. It is difficult to form electrospun fibers by stretching out directly. The applicant believes that this is due to the fact that water is a good solvent for silver ni...

Embodiment 3

[0030] Taking mass as the unit, 8 parts of acetone, 2 parts of dimethylacetamide and 1 part of water are used as raw materials, mixed and configured as a solvent, after adding cellulose acetate particles and silver nitrate crystals, slowly heating at a heating rate of 5°C until Stir at 80°C for 60 minutes to fully dissolve the cellulose acetate particles to obtain a composite cellulose acetate solution containing 2wt% silver nitrate, then add 3wt% ammonium bicarbonate and stir to make it easy to expand twice. The concentration of cellulose acetate in the solution is 10wt%.

[0031] Electrospinning the above solution at a spinning speed of 0.6ml / h and a voltage of 15kV, the jet flow formed by the spinning solution has the best stability, and there will be no more droplets in the above Example 1 without sufficient It is difficult to form electrospun fibers by stretching and throwing out directly, and the phenomenon of easy clogging of the nozzle in Example 2 does not occur. The...

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Abstract

The invention discloses a preparation method of antibacterial nanofibers, which comprises the following steps of: by mass, using 6 to 9 parts of acetone, 1 to 3 parts of dimethylacetamide and 0.5 to 2 parts of water as the raw materials, mixing the raw materials to prepare a solvent and adding cellulose acetate particles and silver nitrate crystals into the solvent to prepare cellulose acetate electrostatic spinning solution; carrying out electrostatic spinning on the cellulose acetate electrostatic spinning solution; carrying out drying treatment on the obtained electrostatic spinning fibers at a temperature of 60 DEG C and under the vacuum condition; and irradiating the dried electrostatic spinning fibers for 4 to 8 hours by ultraviolet light and reducing silver ions into silver nanoparticles so as to obtain the nanorfibers with an antibacterial function. The preparation method enables the electrostatic spinning solution to stably prepare the nano cellulose with the antibacterial function mainly by determining the optimal content of water and silver nitrate in the electrostatic spinning solution, is simple to operate and is low in cost.

Description

technical field [0001] The invention relates to the technical field of electrospinning, in particular to a method for preparing antibacterial nanofibers based on cellulose acetate electrospinning solution. Background technique [0002] Cellulose Acetate (Cellulose Acetate, abbreviated as CA, or cellulose acetate, cellulose acetate) is the acetate of cellulose, which was first prepared in 1865. It was esterified with acetic acid or acetic anhydride under the action of a catalyst. , and a thermoplastic resin obtained. Cellulose acetate is used in the base of photographic film, as a component of some adhesives, and as a synthetic fiber. Cellulose acetate has the characteristics of rich raw material sources, easy solubility and fusibility, safety, mildness and good biocompatibility, and is currently a common raw material for preparing nanofibers. [0003] Electrospinning is a special form of electrostatic atomization of polymer fluids. At this time, the substances split by ato...

Claims

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Application Information

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IPC IPC(8): D01F2/28D01F1/10D01F11/02D01D5/00D01D10/06
CPCD01D5/00D01D10/06D01F1/10D01F2/28D01F11/02
Inventor 刘秀珠
Owner 吴江中天喷织有限公司
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