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Preparation method of alkylation chitosan fiber

A technology for chitosan and alkylation, which is applied in the field of preparation of alkylated chitosan fibers, can solve the problems of poor mechanical properties of fibers and increasing the hydrophobicity of chitosan.

Inactive Publication Date: 2013-10-16
DALIAN HONGYE MARINE BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may be due to the introduction of long-chain alkanes, which increased the hydrophobicity of chitosan, resulting in poorer mechanical properties of fibers obtained under the existing dissolution and coagulation bath conditions

Method used

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  • Preparation method of alkylation chitosan fiber
  • Preparation method of alkylation chitosan fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Hexadecyl chitosan raw material: 800mPa·s (when the concentration of glacial acetic acid is 1%), the degree of substitution is 60%, the ash content is 0.3%, and the moisture content is 10%.

[0019] Get 500g concentration and be the glycine propionate ionic liquid of 5% and 2% urea mixed solution, slowly add 55.6g hexadecyl chitosan at 25 ℃, stir 3h after the hexadecyl chitosan is completely dissolved, Carry out 2 times of filtration with 300 mesh filter cloths, and stand overnight to obtain the light yellow transparent hexadecyl chitosan spinning solution. The hexadecyl chitosan spinning solution was transferred into a self-designed spinning kettle, and the hexadecyl chitosan solution was extruded from a spinneret with a hole diameter of 0.08mm at an extrusion speed of 0.05m / s. Extrude from the wire sheet, and then enter the coagulation bath (-50% stretching) with a temperature of 5°C and a concentration of 4% ammonium sulfate ethanol solution and a stretching bath wit...

Embodiment 2

[0030] Octyl chitosan raw material: 1000mPa·s (when the concentration of glacial acetic acid is 1%), the degree of substitution is 20%, the ash content is 0.9%, and the moisture content is 5%.

[0031] Get 500g concentration and be 5% proline butyrate ionic liquid and 2% urea mixed solution, slowly add 37.6g octane chitosan at 25 ℃, stir 2h after octane chitosan is completely dissolved, use The 300-mesh filter cloth is filtered twice, and degassed by high-speed centrifugation to obtain a light yellow transparent octyl chitosan spinning solution. The octyl chitosan spinning solution was transferred into a self-designed spinning kettle, and the octyl chitosan solution was extruded from the spinneret with a hole diameter of 0.06 mm at an extrusion speed of 0.05 m / s, followed by After entering the stretching bath (1.3 times stretching) with a temperature of 5°C and a concentration of 2% ammonium sulfate ethanol solution (-50% stretching) and a temperature of 5°C and a concentratio...

Embodiment 3

[0033] Decyl chitosan raw material: 1500mPa·s (when the concentration of glacial acetic acid is 1%), the degree of substitution is 40%, the ash content is 0.6%, and the moisture content is 2%.

[0034] Get 500g concentration and be the glycine propionate ionic liquid of 5% and 2% urea mixed solution, slowly add 43.5g decanyl chitosan at 25 ℃, stir 3.5h after decanyl chitosan is completely dissolved, use 300 mesh filter cloth is carried out 2 times of filtration, and high-speed centrifugation defoaming, obtains light yellow transparent decanyl chitosan spinning solution. Transfer the decanyl chitosan spinning solution into a self-designed spinning kettle, extrude the decanyl chitosan solution from the spinneret with a hole diameter of 0.07mm at an extrusion speed of 0.05m / s, and enter the Equipped with a coagulation bath (-50% stretching) of a 4% ammonium sulfate ethanol solution at a temperature of 5°C and a stretching bath (1.5 times stretching) of a 3% ammonium sulfate ethan...

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Abstract

The invention discloses a preparation method of an alkylation chitosan fiber, which comprises dissolving alkylation chitosan in 5% of amino acid carboxylate ionic liquid and 2% of urea mixing solution, preparing alkylation chitosan spinning solution with the concentration of 8-10wt%, and obtaining the alkylation chitosan fiber after operation of filter pressing, static deaeration, spinneret plate extrusion, coagulating bath solidification of ammonium sulfate ethanol solution of 2-4%, stretch bath stretching of ammonium sulfate ethanol solution of 1%, washing in hot-water bath of 50 DEG C, natural airing and the like. The fineness of the alkylation chitosan fiber is 1.0-7.0dtex, the strength of the alkylation chitosan fiber is not smaller than 2.0CN / dtex, the stretch of the alkylation chitosan fiber is larger than 8%, and the initial modulus of the alkylation chitosan fiber is larger than 0.8kg / mm<2>. The fiber can serve as an operation suture line, a surgical auxiliary material and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of fiber materials, and in particular relates to a preparation method of alkylated chitosan fiber. Specifically, high molecular weight long-chain alkylated chitosan is used as a raw material, and the mixed aqueous solution of amino acid carboxylate ionic liquid and urea is used as a solvent to prepare a suitable spinning solution; after spinning, coagulation, stretching and other processes, Preparation of Alkylated Chitosan Fibers. Background technique [0002] Chitosan fiber is a polymer functional fiber material with certain mechanical strength, which is made of chitosan as the main raw material through spinning, coagulation, stretching and other processes. It has non-toxic, degradable, antibacterial, anti-mildew, It has excellent properties such as deodorization and heat preservation, and is widely used in the fields of textiles and medical materials. Its preparation technology is a resear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/00D01D5/06D01D5/14D01D1/02D01D1/10
Inventor 于世涛李露刘仕伟袁冰解从霞刘福胜高国辉
Owner DALIAN HONGYE MARINE BIOTECH