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Method for preparing porous fiber from natural polymers and product and application thereof

A technology of natural polymers and porous fibers, which is applied in the field of preparing porous fibers from natural polymers. It can solve the problems of inability to realize continuous large-scale preparation and limit the application of porous fibers, and achieve the effects of simple preparation methods, low cost and wide sources.

Inactive Publication Date: 2019-11-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the traditional directional freezing method cannot achieve continuous large-scale preparation due to the limitation of its mold. For the occasions that require large-scale continuous preparation of porous fibers, this shortcoming severely limits the application of directional freezing method to prepare porous fibers.

Method used

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  • Method for preparing porous fiber from natural polymers and product and application thereof
  • Method for preparing porous fiber from natural polymers and product and application thereof
  • Method for preparing porous fiber from natural polymers and product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Dissolve 0.2 g of sodium carboxymethyl cellulose powder in 10 ml of deionized water, and after dissolving completely, prepare a sodium carboxymethyl cellulose solution with a mass fraction of 2%.

[0039] (2) Put the solution in the syringe, extrude the solution through the extrusion pump, place the copper ring in a low-temperature reaction bath, the temperature of the copper ring is -90 ° C, the solution passes through the copper ring for freezing-spinning process, and freezes The final fiber is collected by motor.

[0040] (3) Freeze-drying the frozen fiber obtained in step (2) for 24 hours to remove the solvent to obtain a porous fiber with an oriented porous structure.

[0041] (4) Weaving the porous fiber obtained in step (3) into a fabric.

Embodiment 2

[0043](1) Dissolve 1 g of sodium carboxymethyl cellulose powder in 10 ml of deionized water, and after dissolving completely, make a sodium carboxymethyl cellulose solution with a mass fraction of 10%.

[0044] (2) Put the solution in the syringe, extrude the solution through the extrusion pump, place the copper ring in a low-temperature reaction bath, the temperature of the copper ring is -50 ° C, the solution passes through the copper ring for freezing-spinning process, and freezes The final fiber is collected by motor.

[0045] (3) Freeze-drying the frozen fiber obtained in step (2) for 24 hours to remove the solvent to obtain a porous fiber with an oriented porous structure.

[0046] (4) Weaving the porous fiber obtained in step (3) into a fabric.

Embodiment 3

[0048] (1) Dissolve 0.5 g of sodium carboxymethyl cellulose powder in 10 ml of deionized water, and after dissolving completely, prepare a sodium carboxymethyl cellulose solution with a mass fraction of 5%.

[0049] (2) Put the solution in the syringe, squeeze out the solution through the extrusion pump, place the copper ring in a low-temperature reaction bath, the temperature of the copper ring is -100 ° C, the solution passes through the copper ring for freezing-spinning process, and freezes The final fiber is collected by motor.

[0050] (3) Freeze-drying the frozen fiber obtained in step (2) for 24 hours to remove the solvent to obtain a porous fiber with an oriented porous structure.

[0051] (4) Weaving the porous fiber obtained in step (3) into a fabric.

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Abstract

The invention relates to a method for preparing a porous fiber from natural polymers and a product and application thereof. The preparation method includes the following steps that 1, a natural polymer solution for spinning is prepared; 2, the natural polymer solution is subjected to solution spinning, directional freezing is conducted at the time of spinning, and fiber is collected; 3, the fiberis freeze-dried to remove ice crystals, and the porous fiber with an oriented pore structure is obtained. Through the combination of directional freezing and solution spinning, the obtained porous fiber has the oriented pore structure, and the method can be widely used for preparing porous fiber materials from different kinds of natural polymers.

Description

technical field [0001] The invention relates to the field of preparation of porous fibers, in particular to a method for preparing porous fibers from natural polymers and its products and applications. Background technique [0002] Natural polymers refer to macromolecular organic compounds that are not artificially synthesized and naturally exist in animals, plants and microorganisms. They have the advantages of environmental protection, environmental friendliness, wide sources, and low cost. As a renewable and sustainable resource, natural polymer materials have begun to show increasingly important economic status and strategic significance in today's increasingly urgent energy issue. [0003] Common natural polymers mainly include cellulose, lignin, starch, chitin, chitosan, other polysaccharides, proteins, and natural rubber. Among them, briefly introduce the four natural polymers used in the patent: cellulose, starch, chitosan, and silk protein. 1. Cellulose. Cellulos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D1/02D01F2/28D01F9/00D01F4/02
CPCD01D1/02D01D5/00D01F2/28D01F4/02D01F9/00
Inventor 柏浩崔滢
Owner ZHEJIANG UNIV
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