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Alginic acid fiber with high orientation degree and preparation method thereof

A technology of alginate fiber and high orientation, which is applied in the direction of spinning solution preparation, fiber chemical characteristics, wet spinning method, etc., can solve the problems that high orientation alginate fiber cannot be formed and cannot be stretched, and achieves the weakening of hydrogen bonds , Improve fiber strength, increase the effect of fiber draw ratio

Active Publication Date: 2021-10-01
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of factors such as the movement resistance of alginic acid macromolecules, it is often not stretched or less stretched in actual production, and highly oriented alginic acid fibers cannot be formed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of alginic acid fiber with high degree of orientation, comprising the following steps:

[0027] In the first step, 140kg of polyvinyl alcohol with a degree of alcoholysis of 99% and a degree of polymerization of 1700 is added to 830kg of water, heated at 100°C to fully dissolve, and after the PVA aqueous solution drops below 60°C, add 30kg of 1.2×10^5 Dalton Sodium alginate, fully dissolved to form spinning stock solution;

[0028] In the second step, the spinning stock solution is placed under the condition of 45-60°C for static defoaming;

[0029] In the third step, under the pressure of 0.6Mpa, the first coagulation bath and the second coagulation bath are coagulated by spinning at a speed of 9.5 meters per second through a 0.07mm spinneret hole; the first coagulation bath is sodium sulfate with a mass fraction of 34% Aqueous solution; The second coagulation bath is a calcium chloride aqueous solution with a mass fraction of 3%;

[0030] In the...

Embodiment 2

[0033] A preparation method of alginic acid fiber with high degree of orientation, comprising the following steps:

[0034] In the first step, 140kg of polyvinyl alcohol with a degree of alcoholysis of 99% and a degree of polymerization of 1700 is added to 830kg of water, heated at 100°C to fully dissolve, and after the PVA aqueous solution drops below 60°C, add 30kg of 1.2×10^5 Dalton Sodium alginate, fully dissolved to form spinning stock solution;

[0035] In the second step, the spinning stock solution is placed under the condition of 45-60°C for static defoaming;

[0036] In the third step, under the pressure of 0.6Mpa, the first coagulation bath and the second coagulation bath are coagulated by spinning at a speed of 9.5 meters per second through a 0.07mm spinneret hole; the first coagulation bath is sodium sulfate with a mass fraction of 34% Aqueous solution; The second coagulation bath is a calcium chloride aqueous solution with a mass fraction of 3%;

[0037] In the...

Embodiment 3

[0040] A preparation method of alginic acid fiber with high degree of orientation, comprising the following steps:

[0041] In the first step, 140kg of polyvinyl alcohol with a degree of alcoholysis of 99% and a degree of polymerization of 2400 is added to 830kg of water, heated at 100°C to fully dissolve, and after the PVA aqueous solution drops below 60°C, add 30kg of 1.2×10^5 Dalton Sodium alginate, fully dissolved to form spinning stock solution;

[0042] In the second step, the spinning stock solution is placed under the condition of 45-60°C for static defoaming;

[0043] In the third step, under the pressure of 0.6Mpa, the first coagulation bath and the second coagulation bath are coagulated by spinning at a speed of 9.5 meters per second through a 0.07mm spinneret hole; the first coagulation bath is sodium sulfate with a mass fraction of 34% Aqueous solution; The second coagulation bath is a calcium chloride aqueous solution with a mass fraction of 3%;

[0044]In the ...

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Abstract

The invention discloses alginic acid fiber with high orientation degree and a preparation method thereof, and belongs to the technical field of high polymer materials. The method comprises the following steps of dissolving sodium alginate with the molecular weight of 400-10000 Daltons and polyvinyl alcohol with the alcoholysis degree of 70-100 and the polymerization degree of 500-4000 as raw materials to obtain a spinning solution, performing standing, defoaming and spinning, carrying out first coagulating bath and second coagulating bath treatment, performing stretching, and performing water washing to remove the polyvinyl alcohol to finally obtain the alginic acid fiber with high orientation degree. The molecular weight of the sodium alginate and the alcoholysis degree and polymerization degree of the polyvinyl alcohol are reasonably selected; the alginic acid / polyvinyl alcohol composite fiber with high orientation degree is obtained by optimizing spinning and stretching conditions, and the essence that intermolecular or intramolecular hydrogen bonds hinder fiber super-stretching and finally influence the fiber strength is disclosed; and the purposes of weakening the hydrogen bonds, improving the fiber stretching multiple and finally improving the fiber strength are achieved by changing the conditions.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an alginic acid fiber with a high degree of orientation and a preparation method thereof. Background technique [0002] Alginic acid is a natural polymer composed of polymannuronic acid chain segments, polyguluronic acid chain segments and random copolymerized chain segments of the two. Alginate fiber is a new regenerated fiber in the past ten years. With good hygroscopicity and comfort, it is expected to be applied in large quantities in the textile field. [0003] Chinese Patent Publication No. CN101033564 introduces a preparation method of common and functional calcium alginate fibers: solidify a sodium alginate solution with a mass percentage of 3% to 8% in a sufficient amount of 2% to 5% calcium chloride Calcium alginate fibers were prepared by wet spinning in a bath. Chinese Patent Publication No. CN1978718 discloses a preparation method of high-stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/18D01F8/10D01D1/02D01D5/06D01D5/12D01D5/14
CPCD01F8/18D01F8/10D01D5/06D01D5/12D01D5/14D01D1/02
Inventor 时留新孙海燕
Owner NANJING FORESTRY UNIV
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