A kind of preparation method of superhydrophobic lyocell fiber

A fiber and super-hydrophobic technology, applied in the field of preparation of super-hydrophobic lyocell fibers, can solve the problems of high equipment requirements and complex preparation process, and achieve the effects of strong super-hydrophobicity, simple production process and little environmental pollution.

Active Publication Date: 2021-01-01
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is obtained by modifying the surface of the fiber material, and the preparation process is relatively complicated
At present, the methods for preparing superhydrophobic fibers mainly include self-assembly method, sol-gel method, and vapor deposition method. Most of these methods modify or modify the surface of the fiber. The preparation process is complicated and the equipment requirements are high.

Method used

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  • A kind of preparation method of superhydrophobic lyocell fiber
  • A kind of preparation method of superhydrophobic lyocell fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of low surface energy substances: Weigh 200 grams of rice bran wax (produced by Haining Debang Chemical Co., Ltd.) and immerse in 1g / L sodium hydroxide aqueous solution, the quality of rice bran wax (g) and the volume of sodium hydroxide aqueous solution (mL) The bath ratio is 1:30, and the reaction is continuously stirred at 90°C for 15 hours. After the reaction is completed, 1g / L hydrochloric acid solution is added to neutralize the pH of the solution to 6, and then 1g / L calcium chloride solution is added, and stirred evenly to make Precipitation occurs, filter, remove the waste liquid, then wash the filter cake with hot water at 40°C, and dry it in vacuum. Then, acetone was used as the extractant with a solid-to-liquid ratio of 1:10. After five extractions, the extract was collected and distilled under reduced pressure at 40°C to obtain long-chain fatty alcohols.

[0022] (2) Preparation of spinning solution: the aqueous solution of NMMO with a mass f...

Embodiment 2

[0030] (1) Preparation of low surface energy substances: Weigh 200 grams of rice bran wax (produced by Haining Debang Chemical Co., Ltd.) and immerse in 2g / L sodium hydroxide aqueous solution, the mass of rice bran wax (g) and the volume of sodium hydroxide aqueous solution (mL) The bath ratio is 1:35, and the reaction is continuously stirred at 95°C for 18 hours. After the reaction is completed, 2g / L hydrochloric acid solution is added to neutralize the pH of the solution to 6.5, and then 2g / L calcium chloride solution is added and stirred evenly to make Precipitation occurred, filtered, and the waste liquid was removed, and the filter cake was washed with hot water at 45°C and dried in vacuum. Then, acetone was used as the extractant with a solid-to-liquid ratio of 1:15. After 6 extractions, the extract was collected and distilled under reduced pressure at 45°C to obtain long-chain fatty alcohols.

[0031] (2) Preparation of spinning solution: the aqueous solution of 54.3% N...

Embodiment 3

[0039] (1) Preparation of low surface energy substances: Weigh 200 grams of rice bran wax (produced by Haining Debang Chemical Co., Ltd.) and immerse in 3g / L sodium hydroxide aqueous solution, the mass of rice bran wax (g) and the volume of sodium hydroxide aqueous solution (mL) The bath ratio is 1:35, and the reaction is continuously stirred at 95°C for 18 hours. After the reaction is completed, 3g / L hydrochloric acid solution is added to neutralize the pH of the solution to 6.5, and then 3g / L calcium chloride solution is added, and stirred evenly to make Precipitation occurred, filtered, and the waste liquid was removed, and the filter cake was washed with hot water at 45°C and dried in vacuum. Then, acetone was used as the extractant with a solid-to-liquid ratio of 1:15. After 7 extractions, the extract was collected and distilled under reduced pressure at 45°C to obtain long-chain fatty alcohols.

[0040] (2) Preparation of spinning solution: the aqueous solution of 52.7% ...

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Abstract

The invention relates to a preparation method of super-hydrophobic lyocell fiber. The preparation method is characterized in that long-chain fatty alcohol with low surface energy matter is prepared, and the long-chain fatty alcohol and cotton pulp are dissolved in a water solution of N-methylmorpholine-N-oxidant to prepare spinning liquid; the spinning liquid enters a spinning system, the jet yarns are perpendicularly stretched in the air and enter a coagulating tank to be coagulated into fiber; and fiber is subjected to technologies such as alcohol washing, bleaching, water washing, oil-applying and drying, and the super-hydrophobic lyocell fiber is obtained. The dry breaking strength of the prepared lyocell fiber is between 42-44 cN / tex, and the dry breaking elongation is between 13.5-15%. The wet breaking strength of the lyocell fiber is between 26-28 cN / tex, the wet breaking elongation of the fiber is between 15.5-17%, and the main strength performance of the lyocell fiber is closeto the strength performance of lyocell fiber purchased from the market. When the prepared lyocell fiber is woven into textiles, the apparent contact angle of water drops on the textiles is between 151 and 153 degrees, and the prepared lyocell fiber has outstanding super-hydrophobic property according to the definition of the super-hydrophobic function of the textiles.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic textiles, and in particular relates to a preparation method of superhydrophobic lyocell fibers. Background technique [0002] Lyocell fiber has the hygroscopicity, dyeability and wearing comfort of natural fibers. In addition, it has excellent physical properties such as high strength of synthetic fibers, and is an excellent wearing fiber. The preparation method of the lyocell fiber is to use N-methylmorpholine-N-oxide (abbreviation: NMMO) as a solvent to directly dissolve the spinning pulp, and prepare it through a dry spraying-wet spinning process. The production process of lyocell fiber has no pollution to the environment, and it can be degraded naturally. It is called the revolutionary fiber and textile raw material in the 21st century. With the improvement of social living standards, the market demand for multifunctional textiles is increasing day by day, and among them, textiles wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/02D01F1/10D06L4/27D06L1/12
CPCD01F1/10D01F2/02D06L1/12D06L4/27
Inventor 董雄伟黄宇娇陈悟彭雄义朱立成
Owner WUHAN TEXTILE UNIV
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