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Preparation method of alkali-soluble hydroxyethylcellulose fiber spinning solution with high solid content

A technology of hydroxyethyl cellulose and cellulose fiber, which is applied in the field of preparation of high solid content alkali-soluble hydroxyethyl cellulose fiber spinning solution, can solve the problems of high cost, difficulty in industrialization, and low dissolution efficiency. Achieve the effects of cost reduction, extensive industrialization prospects, and improvement of dissolution efficiency

Inactive Publication Date: 2010-10-27
YANCHENG LANBANG TECHN FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of ionic liquids as the cellulose solvent system has the problems of low dissolution efficiency, high cost, and difficulty in industrialization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 8.0wt% sodium hydroxide solution and hydroxyethyl cellulose powder with a degree of etherification of 0.40 were fed into the Φ40 , the first counter-rotating twin-screw extruder with an aspect ratio of 15, the screw speed is controlled at 120rpm, after being fully mixed, it is continuously extruded into the second co-rotating twin-screw extruder with a diameter of Φ55 and an aspect ratio of 60 , control the temperature of the second twin-screw extruder to -20°C, and the rotation speed to 40rpm to obtain a transparent and uniform spinning dope that is fully dissolved, well adjusted in temperature, and free of air bubbles. The spinnability is very good. After metering and filtering , the breaking strength of the hydroxyethyl cellulose fiber obtained after wet spinning and heat treatment is 2.53cn / dtex, the tensile modulus is 70cn / dtex, and the elongation is 15.2%.

Embodiment 2

[0025] 8.0wt% sodium hydroxide solution and hydroxyethyl cellulose powder with a degree of etherification of 0.40 were fed into the Φ40 , the first counter-rotating twin-screw extruder with an aspect ratio of 15, the screw speed is controlled at 120rpm, after being fully mixed, it is continuously extruded into the second co-rotating twin-screw extruder with a diameter of Φ55 and an aspect ratio of 60 , control the temperature of the second twin-screw extruder to -25°C, and the rotation speed to 40rpm to obtain a transparent and uniform spinning dope that is fully dissolved, well adjusted in temperature, and free of air bubbles. The spinnability is very good. After metering and filtering , the breaking strength of the hydroxyethyl cellulose fiber obtained after wet spinning and heat treatment is 2.96cn / dtex, the tensile modulus is 73cn / dtex, and the elongation is 14.6%.

Embodiment 3

[0027] 8.0wt% sodium hydroxide solution and hydroxyethyl cellulose powder with a degree of etherification of 0.40 were fed into the Φ40 , the first counter-rotating twin-screw extruder with an aspect ratio of 15, the screw speed is controlled at 120rpm, after being fully mixed, it is continuously extruded into the second co-rotating twin-screw extruder with a diameter of Φ55 and an aspect ratio of 60 , control the temperature of the second twin-screw extruder to -25°C, and the rotation speed to 40rpm to obtain a transparent and uniform spinning dope that is fully dissolved, well adjusted in temperature, and free of air bubbles. The spinnability is very good. After metering and filtering , the breaking strength of the hydroxyethyl cellulose fiber obtained after wet spinning and heat treatment is 2.99cn / dtex, the tensile modulus is 78cn / dtex, and the elongation is 13.1%.

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Abstract

The invention relates to a preparation method of a alkali-soluble hydroxyethylcellulose fiber spinning solution with high solid content, belonging to the technical field of novel environment-friendly fiber material preparation. The preparation method comprises the following steps of: (1) separately, continuously and quantificationally adding a dilute alkali solution with the concentration of 4-12 percent and alkali-soluble hydroxyethylcellulose powder with the etherification degree of 0.2-0.6 to a first counter-rotating twin screw extruder, wherein the weight percentage of the alkali-soluble hydroxyethylcellulose is 6-18 percent; and (2) sufficiently mixing and then continuously extruding into a second co-rotating twin screw extruder, regulating dissolution temperature to -30-5 DEG C and setting material residence time to 10-60 minutes, sufficiently dissolving, regulating the temperature, defoaming and then extruding to form the alkali-soluble hydroxyethylcellulose fiber spinning solution, and directly measuring and filtering and then carrying out wet spinning. The invention has continuous and efficient material mixing, dissolving and deforming process and is beneficial to realizing the continuous and stable spinning of the alkali-soluble hydroxyethylcellulose.

Description

technical field [0001] The invention relates to the technical field of manufacturing new environment-friendly fiber materials, in particular to a method for preparing high-solid-content alkali-soluble hydroxyethyl cellulose fiber spinning dope. Background technique [0002] Plant cellulose is a natural polymer, the most abundant source of naturally occurring organic polymers, and it is renewable and biodegradable. Due to the complex crystalline and amorphous forms, a large number of hydrogen bonds and high molecular weight in the fiber, cellulose is neither molten nor soluble in many solvents, so that cellulose is far from being fully utilized. Therefore, any effective, Simple or rapid dissolution methods are of great importance. [0003] At present, the main regenerated cellulose products basically adopt the traditional viscose process, which is to impregnate the cellulose with 18% sodium hydroxide, react with carbon disulfide to form cellulose sulfonate, and then dissolve...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01D13/02D01F2/02
Inventor 尤秀兰念军尤松
Owner YANCHENG LANBANG TECHN FIBER
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