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A kind of preparation method of superhydrophobic polylactic acid fiber

A polylactic acid fiber, super-hydrophobic technology, applied in fiber processing, fiber chemical characteristics, rayon manufacturing and other directions, can solve the problems of isocyanates that are not environmentally friendly, complex finishing processes, and large environmental pollution, and achieve low environmental pollution and low prices. , the effect of simple production process

Active Publication Date: 2020-12-29
汪健捷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application number 201010593300.7 discloses a simple preparation method and application of superhydrophobic fibers and fabrics. This patent is to modify the fiber material with isocyanate and then modify low surface energy substances. The isocyanate used in this method is not environmentally friendly.
This method also finishes on the surface of the fiber, which needs to use a lot of solvents and resins, etc., which causes great pollution to the environment.
The post-finishing process on the surface of the fiber is relatively complicated and requires high equipment
If the fiber material is mixed with low surface energy substances during the preparation process, so that it has superhydrophobicity, the fabric made of the fiber will also have superhydrophobic function, and such studies have rarely been reported.

Method used

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  • A kind of preparation method of superhydrophobic polylactic acid fiber
  • A kind of preparation method of superhydrophobic polylactic acid fiber
  • A kind of preparation method of superhydrophobic polylactic acid fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of octacosanol: Weigh 300 grams of rice bran wax (produced by Haining Debang Chemical Co., Ltd.) and immerse in 2g / 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 1:20, and the reaction is continuously stirred at 95°C for 10 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 a long-chain fatty alcohol (octacosanol).

[0020] (2) Preparation of spinning solution: L-polylactic acid is selected ...

Embodiment 2

[0026] (1) Preparation of octacosanol: Weigh 300 grams of rice bran wax (produced by Haining Debang Chemical Co., Ltd.) and immerse in 3g / 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 1:25, and the reaction is continuously stirred at 96°C for 12 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 occurs, filter, remove the waste liquid, then wash the filter cake with hot water at 50°C, and dry it in vacuum. Then, acetone was used as the extractant with a solid-to-liquid ratio of 1:18. After seven times of extraction, the extract was collected and distilled under reduced pressure at 46°C to obtain a long-chain fatty alcohol (octacosanol).

[0027] (2) Preparation of spinning solution: L-polylactic acid is selected as p...

Embodiment 3

[0033] (1) Preparation of octacosanol: Weigh 300 grams of rice bran wax (produced by Haining Debang Chemical Co., Ltd.) and immerse in 4g / 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 1:28, and the reaction is continuously stirred at 95°C for 14 hours. After the reaction is completed, 4g / L hydrochloric acid solution is added to neutralize the pH of the solution to 6.8, and then 4g / 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 50°C, and dry it in vacuum. Then, acetone was used as the extractant with a solid-to-liquid ratio of 1:18. After seven times of extraction, the extract was collected and distilled under reduced pressure at 46°C to obtain a long-chain fatty alcohol (octacosanol).

[0034] (2) Preparation of spinning solution: L-polylactic acid is selected as p...

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Abstract

The invention relates to a preparation method for a super-hydrophobic polylactic acid fiber. The preparation method is characterized by cmoprising the following steps: preparing octacosanol with low surface energy; simultaneously dissolving octacosanol and polylactic acid in dichloromethane, thereby acquiring a spinning solution; feeding the spinning solution into an electrostatic spinning machinefor electrostatic spinning, thereby acquiring a fiber; treating the fiber by adopting the processes of washing, applying oil, drying, and the like, thereby acquiring the super-hydrophobic polylacticacid fiber. High strength performance of the super-hydrophobic polylactic acid fiber prepared according to the invention is approximate to the high strength performance of polylactic acid fiber purchased in market, so that the super-hydrophobic polylactic acid fiber is a qualified polylactic acid fiber. The super-hydrophobic polylactic acid fiber prepared according to the invention is spun into apolylactic acid fiber fabric; the range of apparent contact angle of water drop on the polylactic acid fiber fabric is within 153-156 degrees; the polylactic acid fiber prepared according to the invention has super hydrophobicity; the whole production process is simple; the cost is low; the production process has less environmental pollution; the application prospect is broad.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic textiles, and in particular relates to a preparation method of superhydrophobic polylactic acid fibers. Background technique [0002] Superhydrophobic fabrics refer to fabrics whose contact angle with water is greater than 150°. Superhydrophobic fabrics have special surface properties and are widely used in waterproof, antifouling and self-cleaning fields. The research on superhydrophobic fabrics has increasingly become a research hotspot. Superhydrophobic finishing agents are usually a class of low surface energy substances, which are usually coated on the surface of fabrics, so that fabrics have superhydrophobic properties. Commonly used superhydrophobic finishing agents include: fluoroorganosilane, polydimethylsilane base siloxane and long chain fatty silane, etc. At present, there are many methods for preparing superhydrophobic fabrics, such as: sol-gel method, vapor deposition meth...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10D01D11/00D01D10/06D01D5/00
CPCD01D5/0007D01D10/06D01D11/00D01F1/10D01F6/92
Inventor 彭雄义殷国益粟斯伟董雄伟蔡映杰王强
Owner 汪健捷
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