Preparation method of chitosan/cellulose homogeneous spinning solution

A technology of spinning stock solution and chitosan, which is applied in the direction of spinning solution preparation, cellulose/protein conjugated artificial filament, fiber chemical characteristics, etc., can solve the problems of difficult mixing evenly, easy generation of bubbles, long time, etc. To achieve the effect of continuous processing, cost saving and simple process route

Active Publication Date: 2015-04-08
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the blending process is easy to generate bubbles, and the blending solution is difficult to mix evenly due to the difference in viscosity of the cellulose and chitosan solutions.
Patent application 200710043563.9 adopts directly dissolving cellulose, chitin / chitosan and ionic liquid to prepare spinning dope. The dissolving process does not carry out swelling of chitin / chitosan, the dissolution process takes a long time, and it is difficult to obtain uniform dope

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Add 3g of chitosan (viscosity-average mass fraction: 1.1 million) into 315g of 1-ethyl-3-methylimidazolium acetate ([EMIM]Ac) ionic liquid, mix well, seal well, and swell at room temperature 4 hours;

[0035] 2. Add 32g of bamboo pulp cellulose (polymerization degree: 500), knead and mix evenly, add to the dissolution kettle, seal it well, vacuumize to 0.1-0.5 atmospheric pressure, and further mix and swell for 12 hours;

[0036]3. Turn on the stirring, the stirring speed is 30 rpm, set the heating rate at 5°C / 5min, rise from room temperature to 95°C, stop heating after reaching the set value, and carry out constant temperature dissolution at this temperature, keep warm After dissolving for 6 hours, the sample was observed under a polarizing microscope as a uniform black field of view to obtain a homogeneous cellulose / chitosan ionic liquid spinning stock solution.

Embodiment 2

[0038] 1. Add 3.5g of chitosan (viscosity-average mass fraction: 390,000) into 315g of 1-butyl-3-methylimidazole acetate ([BMIM]Ac) ionic liquid, mix well, seal well, and store at room temperature Swell for 4 hours;

[0039] 2. Add 31.5g of hemp pulp cellulose (polymerization degree 600), knead and mix evenly, add to the dissolution kettle, seal it well, vacuumize to 0.1-0.5 atmospheric pressure, and further mix and swell for 12 hours;

[0040] 3. Turn on the stirring, the stirring speed is 90 rpm, set the heating rate at 5°C / 5min, rise from room temperature to 90°C, stop heating after reaching the set value, and carry out constant temperature dissolution at this temperature, keep warm After dissolving for 4 hours, the sample was observed under a polarizing microscope as a uniform black field of view to obtain a homogeneous cellulose / chitosan ionic liquid spinning stock solution. Example 3

Embodiment 3

[0041] 1. Add 3g of chitosan (viscosity-average mass fraction: 150,000) into 315g of 1-allyl-3-methylimidazolium chloride ([AMIM]Cl) ionic liquid, mix well, seal well, and swell at room temperature 4 hours;

[0042] 2. Add 32g of bagasse pulp cellulose (polymerization degree 500), knead and mix evenly, add to the dissolution kettle, seal well, vacuumize to 0.1-0.5 atmospheric pressure, and further mix and swell for 12 hours;

[0043] 3. Turn on the stirring, the stirring speed is 120 rpm, set the heating rate at 5°C / 5min, rise from room temperature to 95°C, stop heating after reaching the set value, and carry out constant temperature dissolution at this temperature, dissolve 4 Hours later, the sample was observed under a polarizing microscope as a uniform black field of view, and a homogeneous cellulose / chitosan ionic liquid spinning stock solution was obtained.

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Abstract

The invention relates to a preparation method of a spinning solution. Specifically, the invention relates to a preparation method of a chitosan / cellulose homogeneous spinning solution. The preparation method comprises the steps that: chitosan is swelled in an ionic liquid; cellulose is added, and the mixture is well mixed by stirring; swelling is carried out again; and stirring and dissolving are carried out under a vacuum heating condition, such that the chitosan / cellulose homogeneous spinning solution is obtained. The processing method provided by the invention is simple, fast, and highly efficient. A processing process is continuous, and is beneficial for industrial large-scale productions. A simultaneous dissolving method is adopted during the processing process, such that a defect of uniform mixing difficulty caused by gas bubbles produced by separate solution mixing is avoided, such that production cost is saved.

Description

technical field [0001] The invention relates to a preparation method of a spinning stock solution, in particular to a preparation method of a chitosan / cellulose homogeneous spinning stock solution. Background technique [0002] With the rise of oil prices and the one-time resource depletion problem in the near future, the chemical fiber industry based on oil is facing great challenges. Therefore, bio-sourced fibers with excellent performance and in line with sustainable development strategies have become the leading development in the future. direction. Cellulose is the natural polymer with the largest reserves in nature, which can be regenerated rapidly, and the annual regeneration capacity exceeds 1.0×10 10 Ton. Chitin is a natural polymer with natural reserves second only to cellulose, and its annual biosynthesis is nearly 10 billion tons. Chitosan is the deacetylation product of chitin and is the most abundant alkaline biopolysaccharide in nature. Cellulose fiber has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/18D01F8/02D01D1/02
Inventor 段先泉徐纪刚李晓俊朱庆松孙玉山必新义
Owner CHINESE TEXTILE ACAD
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