Method for preparing rare earth polysaccharide composite fibers

A polysaccharide compounding and fiber technology, which is applied to artificial filaments made of cellulose derivatives, chemical characteristics of fibers, chemical post-treatment of cellulose/protein rayon, etc., can solve problems such as poor stability and application limitations, and achieve High water absorption, low price, effect of reducing dependence

Inactive Publication Date: 2015-03-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Rare earth complexes have unique optical, electrical, and magnetic properties of rare earth metal ions, and are widely used in the fields of luminescence and display due to their unique fluorescence properties and excellent paramagnetism. However, due to their poor stability, their applications are limited. limits

Method used

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  • Method for preparing rare earth polysaccharide composite fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Raw material: sodium carboxymethyl cellulose, viscosity: 200-800mPa·s (10g / L, 20°C).

[0038] A preparation method of rare earth polysaccharide composite fiber, specifically:

[0039] Add the dry sodium carboxymethylcellulose powder into deionized water to prepare a sodium carboxymethylcellulose solution with a mass fraction of 5%, stir at room temperature at a speed of 200rpm for 4 hours, let it stand for swelling for 2h, and stir at a speed of 400rpm After 6 hours, a stable and uniform spinning solution was obtained, and filtered. The filter material had a pore size of 800 mesh and a filter pressure of 0.5 MPa, and stood still for 24 hours to remove air bubbles.

[0040] Dissolve lanthanum chloride powder in deionized water to obtain a coagulation bath, and Ce in the coagulation bath 3+ The concentration is 0.5mol / L, pH=2.

[0041] Using the wet spinning process, the spinneret has 6 holes, and the diameter of a single spinneret hole is 0.1mm. The above-mentioned spi...

Embodiment 2

[0043] Raw material: sodium carboxymethyl cellulose, viscosity: 200-800mPa·s (10g / L, 20°C).

[0044] A preparation method of rare earth polysaccharide composite fiber, specifically:

[0045] Add the dry sodium carboxymethylcellulose powder into deionized water to prepare a sodium carboxymethylcellulose solution with a mass fraction of 5%, stir at room temperature at a speed of 200rpm for 4 hours, let it stand for swelling for 2h, and stir at a speed of 400rpm After 6 hours, a stable and uniform spinning solution was obtained, and filtered. The filter material had a pore size of 800 mesh and a filter pressure of 0.5 MPa, and stood still for 24 hours to remove air bubbles.

[0046] Dissolve lanthanum chloride powder in deionized water to obtain a coagulation bath, and in the coagulation bath, La 3+ The concentration is 0.5mol / L, pH=2.

[0047] Using the wet spinning process, the spinneret has 6 holes, and the diameter of a single spinneret hole is 0.1mm. The above-mentioned spin...

Embodiment 3

[0049] Raw material: sodium alginate, viscosity: 200-800m Pa·s (10g / L, 20°C).

[0050] A preparation method of rare earth polysaccharide composite fiber, specifically:

[0051] Add the dry sodium alginate powder into deionized water to prepare a sodium alginate solution with a mass fraction of 5%. Stir at room temperature at a speed of 200rpm for 4 hours, let it stand for swelling for 2 hours, and stir at a speed of 400rpm for 6 hours to obtain a stable and uniform solution. Filtration, the pore size of the filter material is 800 mesh, the filter pressure is 0.5MPa, let it stand for 24 hours to remove air bubbles.

[0052] Dissolve lanthanum chloride powder in deionized water to obtain a coagulation bath, and in the coagulation bath, La 3+ The concentration is 0.5mol / L, pH=2.

[0053] Using the wet spinning process, the spinneret has 6 holes, and the diameter of a single spinneret hole is 0.1mm. The above-mentioned spinning solution is measured by a metering pump and then ex...

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Abstract

The invention provides a method for preparing rare earth polysaccharide composite fibers. The method is characterized by comprising the following specific steps: step 1, dissolving polysaccharides to prepare a spinning solution; step 2, preparing a coagulating bath, wherein the coagulating bath contains rare earth metal ions; step 3, metering the spinning solution obtained in the step 1 by virtue of a metering pump, extruding the spinning solution to enter the coagulating bath obtained in the step 2 by virtue of a spinning nozzle, wherein the polysaccharides and the rare earth metal ions are subjected to coordination complexation, and the fibers are subjected to coagulation forming; and step 4, cleaning the obtained fibers by virtue of deionized water and drying, thus obtaining the rare earth polysaccharide composite fibers. According to the method disclosed by the invention, the spinning solution with a certain concentration is prepared by utilizing the polysaccharides, the rare earth metal ions are prepared into the coagulating bath of a certain concentration, and the rare earth polysaccharide composite fibers are prepared by virtue of coordination of the polysaccharides and the rare earth metal ions. The spinneret orifice is not blocked during wet spinning, and the spinning operation has high production continuity.

Description

technical field [0001] The invention relates to a preparation method of a rare earth polysaccharide composite fiber, which belongs to the technical field of preparation of functional fibers. Background technique [0002] For more than half a century, the rise of synthetic polymer materials has brought a lot of convenience to people's life, but it is also facing serious challenges. First of all, the performance of synthetic polymer materials needs to be improved; secondly, the recycling and biodegradability of products are poor, and wastes have brought serious environmental pollution, such as disposable polystyrene tableware discarded everywhere, and PVC that deteriorates soil quality Agricultural plastic film, etc.; thirdly, petroleum, the main raw material for synthetic polymer materials, is a non-renewable resource, and its reserves are getting smaller and smaller. According to experts' estimates, the current petroleum reserves are only enough for human use for 20 to 30 ye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/28D01F9/00D01F11/02D01D5/06
Inventor 闻林刚李皆富刘树勇杨曙光
Owner DONGHUA UNIV
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