Method for preparing high-strength alginate fiber

A seaweed fiber and high-strength technology, which is applied in the fields of fiber chemical characteristics, spinning solution preparation, wet spinning method, etc., can solve the problems of reduction and loss of seaweed fiber mechanical properties, and achieve strong drawability, increased activity, Good effect of anti-degradation

Active Publication Date: 2016-10-12
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ensuing problem is that this method of simply reducing the degree of polymerization of sodium alginate will inevitably lead to different degrees of reduction or loss of the mechanical properties of the final seaweed fiber.

Method used

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  • Method for preparing high-strength alginate fiber
  • Method for preparing high-strength alginate fiber
  • Method for preparing high-strength alginate fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation method includes the following steps:

[0044] In the first step, weigh 3g sodium alginate and 0.003g nano-calcium carbonate at a mass ratio of 100:0.1, and set aside;

[0045] In the second step, add the sodium alginate to 100ml of deionized water to dissolve it, stir at room temperature for 3 hours, then heat to 50°C, continue stirring for 2 hours, and prepare alginic acid with a mass percentage concentration of 3% Sodium solution

[0046] The above sodium alginate solution was divided into two parts A and B according to a ratio of 1:5, 0.003g of nano calcium carbonate was added to part A, and the mixture was continuously stirred for 3 hours at room temperature and then sonicated for 0.5 hours to obtain a mixed solution;

[0047] Then, adding part B to the above-mentioned mixed solution and stirring evenly to prepare nano-calcium carbonate-sodium alginate spinning dope;

[0048] In the third step, the obtained nano-calcium carbonate-sodium alginate spinning dope...

Embodiment 2

[0060] The preparation method includes the following steps:

[0061] In the first step, weigh 5g of sodium alginate and 0.0.025g of nano-calcium carbonate at a mass ratio of 100:0.5, and set aside;

[0062] In the second step, dissolve the sodium alginate taken in water, stir at room temperature for 4 hours, then heat to 50°C, continue stirring for 3.5 hours, and prepare a sodium alginate solution with a concentration of 5% by mass;

[0063] Divide the sodium alginate solution into two parts A and B according to the ratio of 1:4, add 0.025 g of nano calcium carbonate to part A, continue to stir at room temperature for 3 hours, and then ultrasonically treat for 1 hour to obtain a mixed solution;

[0064] Then, adding part B to the above-mentioned mixed solution and stirring evenly to prepare nano-calcium carbonate-sodium alginate spinning dope;

[0065] In the third step, the obtained nano-calcium carbonate-sodium alginate spinning dope was filtered and quickly defoamed under a vacuum of...

Embodiment 3

[0078] The preparation method includes the following steps:

[0079] In the first step, weigh 7g of sodium alginate and 0.07g of nano-calcium carbonate at a mass ratio of 100:1, and set aside;

[0080] In the second step, dissolve the sodium alginate taken in water, stir at room temperature for 5 hours, then heat to 50°C, continue stirring for 4 hours, and prepare a sodium alginate solution with a concentration of 7% by mass;

[0081] Divide the sodium alginate solution into parts A and B according to the ratio of 1:4, add 0.07 g of nano calcium carbonate to part A, continue to stir at room temperature for 3 hours, and then ultrasonically treat for 1.5 hours to obtain a mixed solution;

[0082] Then, add part B to the above-mentioned mixed solution and stir evenly to prepare nano-calcium carbonate-sodium alginate spinning dope;

[0083] In the third step, the obtained nano-calcium carbonate-sodium alginate spinning dope is filtered and quickly defoamed under a vacuum of 100 Pa. The temp...

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Abstract

The invention discloses a method for preparing high-strength alginate fiber. The method mainly includes the following steps that a sodium alginate solution with the mass concentration being 3-12% is prepared and divided into two parts according to the volume ratio of 1:3 to 1:5, and nano calcium carbonate is added into one part; then the other part of the sodium alginate solution is added and evenly stirred, and a spinning solution is prepared; the obtained spinning solution is filtered and quickly defoamed, wet spinning is conducted with calcium chloride as coagulating bath, and nano nascent fiber is obtained; then, the nascent fiber is soaked in deionized water for 24-72 h, and then aftertreatment is conducted to obtain the high-strength alginate fiber. By introducing nano calcium carbonate into the sodium alginate solution and using the principle that interaction adsorption and interface free volume of nanoparticles is increased, viscosity of the spinning solution of the alginate fiber is effectively reduced, spinnability of the fiber is improved, the process is simple and easy to control, and the spun fiber is high in strength and good in degradation resistance.

Description

Technical field [0001] The invention relates to a method for preparing seaweed fibers, in particular to a method for preparing high-strength seaweed fibers. Background technique [0002] Sodium alginate is a natural polysaccharide extracted from the cell wall of brown algae. It is composed of α-L-mannuronic acid (M unit) and β-D-guluronic acid (G unit) through 1,4 -A linear natural polymer connected by glycosidic bonds, with an average molecular weight ranging from several thousand to several hundred thousand. [0003] As we all know, due to the strong intermolecular interaction (hydrogen bond, electrostatic interaction) between the molecular chain and the molecular chain, pure sodium alginate solution shows high viscosity even at a lower concentration, and is easy to Gelation makes spinning impossible. [0004] Therefore, in the prior art sodium alginate fiber wet spinning forming process, in order to ensure the spinnability index, it is necessary to try to reduce the viscosity of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/04D01F1/10D01D1/02D01D5/06D01D5/14D01D10/02
CPCD01D1/02D01D5/06D01D5/14D01D10/02D01F1/10D01F9/04
Inventor 谭业强隋坤艳张庆旭夏延致王立斌桑震于雪雯
Owner QINGDAO UNIV
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