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Preparation method of cellulose acetate electrostatic spinning solution

A cellulose acetate and electrospinning technology, which is applied in the direction of spinning solution preparation, rayon manufacturing, and fiber chemical characteristics, can solve the problems of uncontrollability and the influence of electrospinning fiber diameter, etc., and achieve low cost, simple operation, The effect of good application prospects

Inactive Publication Date: 2015-03-11
苏州丽达纺织有限公司
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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 electrospinning solution that is simple to operate and can better control the diameter of the spinning fiber Preparation

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0014] The application proposes a method for preparing a cellulose acetate electrospinning solution that is simple to operate and can better control the diameter of the spinning fiber, including steps:

[0015] First, taking mass as a unit, 6-9 parts of acetone, 1-3 parts of dimethylacetamide and 0.5-2 parts of water are used as raw materials, mixed and then configured into a solvent.

[0016] Next, add cellulose acetate particles with an average molecular weight of 50,000 and silver nitrate crystals to the above solvent, slowly heat to 60-80°C at a heating rate of 2-5°C per minute, and stir for 60-120 minutes to make the cellulose acetate The particles are fully dissolved to obtain a composite cellulose acetate solution containing 1wt% to 3wt% of silver nitrate, wherein the concentration of the cellulose acetate in the solution is 5wt% to 12wt%.

[0017] Again, after cooling the composite cellulose acetate solution, add ammonium bicarbonate with 1wt% to 3wt% of the composite ...

Embodiment 1

[0019] 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%.

[0020] 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

[0023] 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%.

[0024] 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...

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Abstract

The invention discloses a preparation method of a cellulose acetate electrostatic spinning solution. The preparation method comprises the following steps of taking 6-9 parts of acetone by mass, 1-3 parts of dimethylacetamide by mass and 0.5-2 parts of water by mass as raw materials to prepare solvent after mixing; adding cellulose acetate particles and silver nitrate crystals into the solvent, slowly heating to 60-80 DEG C at the heating speed of increasing by 2-5 DEG C at every minute and stirring for 60-120 minutes to fully dissolve the cellulose acetate particles so as to obtain a composite cellulose acetate solution containing 1 wt%-3wt% of silver nitrate; after the composite cellulose acetate solution is cooled, adding ammonium bicarbonate which is 1 wt%-3wt% of the mass of the composite cellulose acetate solution, placing in water bath at 40 DEG C, and mechanically stirring to carry out expansion treatment so as to obtain the cellulose acetate electrostatic spinning solution. According to the preparation method, nano-cellulose with an anti-bacterial function is stably prepared by the electrostatic spinning solution through determining the optimum contents of water and silver nitrate in the electrostatic spinning solution, and the preparation method has the advantages of simplicity in operation and low cost.

Description

technical field [0001] The invention relates to the technical field of electrospinning, in particular to a method for preparing a 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 atomization are not tiny droplets, ...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01F1/10
CPCD01D1/02D01F1/103
Inventor 刘秀珠
Owner 苏州丽达纺织有限公司
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