Blended fiber of sodium alginate/water soluble chitin, preparation method and application thereof

A technology of water-soluble chitin and sodium alginate, applied in the field of polymer chemical materials, can solve the problems of alginate fiber elasticity and unsatisfactory strength, and achieve the effects of good mechanical properties, abundant raw material sources and low price

Inactive Publication Date: 2007-08-15
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the shortcomings that the elasticity and strength of the alginate fiber are not ideal enough, and through blending and modification, which is a simple and effective method for improving the performance of polymer materials, sodium alginate is co-mixed with water-soluble chitin that has the function of promoting wound healing. It provides a kind of sodium alginate / water-soluble chitin blended fiber with ideal comprehensive performance. The blended fiber has good physiological activity, mechanical properties and water absorption performance, and the present invention also provides a method for preparing sodium alginate / gelatin The method of blending fibers, which is simple, feasible and low in cost

Method used

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  • Blended fiber of sodium alginate/water soluble chitin, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: get 45g sodium alginate and be dissolved in 855ml distilled water and obtain the sodium alginate solution of 5% (mass percentage); 40g chitosan is dissolved in 600ml40% (volume percentage) methyl alcohol, 3% (volume percentage) in the mixed aqueous solution of acetic acid , add 15g of acetic anhydride, stir and react at room temperature for 6 hours, add enough acetone, the precipitate is filtered, desalinated, and dried to obtain water-soluble chitin. 5 g of water-soluble chitin was dissolved in distilled water to obtain a 5% (mass percent) water-soluble chitin solution. The above two solutions were fully mixed, filtered, and after degassing under reduced pressure, at room temperature, the composition was 5% (mass percentage) CaCl 2 Sodium alginate / water-soluble chitin fibers were prepared by solution spinning in the coagulation liquid of the mixed liquid of the aqueous solution and 30% (volume percent) absolute ethanol, and the fiber elongation rate was 3...

Embodiment 2

[0012] Embodiment 2: get 35g sodium alginate and be dissolved in 840ml distilled water and obtain 4% (mass percentage) sodium alginate solution; 40g chitosan is dissolved in 600ml50% (volume percentage) methanol, 4% (volume percentage) in the mixed aqueous solution of acetic acid , add 17g of acetic anhydride, stir and react at room temperature for 5 hours, add enough acetone, the precipitate is filtered, desalinated, and dried to obtain water-soluble chitin. 15 g of water-soluble chitin was dissolved in distilled water to obtain a 4% (mass percentage) water-soluble chitin solution. The above two solutions were fully mixed, filtered, and after degassing under reduced pressure, at room temperature, the composition was 7% (mass percentage) CaCl 2 Sodium alginate / water-soluble chitin fibers were prepared by solution spinning in the coagulation liquid of the mixed liquid of the aqueous solution and 40% (volume percent) absolute ethanol, and the fiber elongation rate was 20%.

Embodiment 3

[0013] Embodiment 3: get 25g sodium alginate and be dissolved in 808ml distilled water and obtain 3% (mass percentage) sodium alginate solution; 40g chitosan is dissolved in 600ml60% (volume percentage) methanol, 5% (volume percentage) in the mixed aqueous solution of acetic acid , add 18g of acetic anhydride, stir and react at room temperature for 3 hours, add a sufficient amount of acetone, the precipitate is filtered, desalinated, and dried to obtain water-soluble chitin. 25 g of water-soluble chitin was dissolved in distilled water to obtain a 3% (mass percent) water-soluble chitin solution. The above two solutions were fully mixed, filtered, and after degassing under reduced pressure, at room temperature, the composition was 10% (mass percentage) CaCl 2 Sodium alginate / water-soluble chitin fibers were prepared by solution spinning in the coagulation liquid of the mixed liquid of the aqueous solution and 50% (volume percent) absolute ethanol, and the fiber elongation rate ...

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Abstract

The present invention discloses a blend fiber of sodium alginate / water-soluble chitin and its usage and preparation. The blend fiber of sodium alginate / water-soluble chitin is made as following ways: Mix the solution of sodium alginate which quality percentage is 3 - 5% and the solution of water-soluble chitin which quality percentage is 3 - 5%. The gelatin contains 10 - 70% of the production (blend fiber), and then percolate it and deaerating it in low pressture. Prepare blend fiber of sodium alginate / water-soluble chitin in coagulation fluid by means of spinning. The stretches ratio is 10 - 30%. The blend fiber has good capability of biological activity, good capability of mechanics and water-absorptivity. There are also abundant stuff and low-lying cost. It has good prospect in the domain of medicine, weave and so on, especially for chitosan nonwoven as dressing of wound.

Description

technical field [0001] The invention relates to a sodium alginate / water-soluble chitin blend fiber which can be used for making non-woven fabrics, a preparation method and application thereof, and belongs to the field of macromolecule chemical materials. Background technique [0002] Alginic acid is a heteropolysaccharide composed of β-1,4-D-mannuronic acid and α-1,4-L-glucuronic acid. with Ca 2+ The solution is a coagulation liquid, and sodium alginate can be made into fibers by wet spinning. Ca in fiber 2+ Can interact with Na in human wound secretion + Performs ion exchange to form a wet gel on the affected area. Due to the two advantages of forming a moist wound healing environment and high body absorbability, alginic acid dressings have been more and more widely used today. However, the elasticity and strength of alginate fiber are not ideal, and its economic cost is also relatively high. Chitosan can promote wound healing, but the rigid structure of chitosan make...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/18
Inventor 杜予民樊李红张宝忠杨建红
Owner WUHAN UNIV
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