Method for preparing ramie fiber by using 2,2,6,6-tetramethylpiperidine-1-oxide radical oxidation system

A technology of tetramethylpiperidine and oxidation system, applied in the field of textile processing, can solve the problems of long production process, complex equipment, long time-consuming degumming process, etc., and achieve the effects of reducing energy consumption for degumming, reducing COD value, and shortening degumming time.

Active Publication Date: 2017-06-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention is to solve is the technical problem that the existing degumming process ta

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of method that uses 2,2,6,6-tetramethylpiperidine-1-oxide free radical oxidation system to prepare ramie fiber:

[0026] Add 8 mg of TEMPO, 88 mg of sodium bromide, 0.2 g of anthraquinone, 0.3 g of sodium tripolyphosphate, 0.4 g of sodium tripolyphosphate, 20 g of raw hemp, and 20 g of 11% sodium hypochlorite into 200 mL of water to make an oxidation degumming solution , Soak at 20°C for 10 minutes, during this period use 0.5mol / L sodium hydroxide solution to adjust the pH value of the degumming solution to 10.5; add 2mL ethanol to terminate the oxidation reaction; add 0.4g sodium hydroxide after the reaction, heat up to 100°C and keep warm 60 minutes; take out the fiber and rinse it with clear water, immerse the cleaned fiber in 200 mL of a solution containing 1 gram of sodium bisulfite, and keep it warm at 80° C. for 60 minutes; oil it and dry it to obtain ramie fiber.

Embodiment 2

[0028] A kind of method that uses 2,2,6,6-tetramethylpiperidine-1-oxide free radical oxidation system to prepare ramie fiber:

[0029] Add 16 mg of TEMPO, 176 mg of sodium bromide, 0.5 g of anthraquinone, 0.65 g of sodium tripolyphosphate, 0.8 g of sodium tripolyphosphate, 40 g of raw hemp, and 35 g of 12% sodium hypochlorite into 400 mL of water to form an oxidation degumming solution , Soak at 20°C for 10 minutes, during this period use 0.5mol / L sodium hydroxide solution to adjust the pH value of the degumming solution to 10.5; add 2mL of ethanol to terminate the oxidation reaction; add 0.75g of sodium hydroxide after the reaction, heat up to 100°C and keep it warm 70 minutes; take out the fiber and rinse it with clear water, immerse the cleaned fiber in 400mL of a solution containing 2 grams of sodium hydrosulfite, and keep it warm at 80°C for 60 minutes; oil and dry to obtain ramie fiber.

Embodiment 3

[0031] A kind of method that uses 2,2,6,6-tetramethylpiperidine-1-oxide free radical oxidation system to prepare ramie fiber:

[0032] Add 16 mg of TEMPO, 176 mg of sodium bromide, 0.5 g of anthraquinone, 0.65 g of sodium tripolyphosphate, 0.8 g of sodium tripolyphosphate, 40 g of raw hemp, and 35 g of 12% sodium hypochlorite into 400 mL of water to form an oxidation degumming solution , Soak at 20°C for 10 minutes, during this period use 0.5mol / L sodium hydroxide solution to adjust the pH value of the degumming solution to 11.0; add 2mL of ethanol to terminate the oxidation reaction; add 0.75g of sodium hydroxide after the reaction, heat up to 100°C and keep it warm 60 minutes; take out the fibers and rinse them with clear water, immerse the cleaned fibers in 400 mL of a solution containing 2.5 grams of thiourea dioxide, and keep warm at 80° C. for 60 minutes; oil and dry to obtain ramie fibers.

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PUM

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Abstract

The invention discloses a method for preparing ramie fiber by using a 2,2,6,6-tetramethylpiperidine-1-oxide radical oxidation (TEMPO) system. The method is characterized by comprising the following steps: preparing oxidized degumming liquid from a degumming aid and a reagent of the 2,2,6,6-tetramethylpiperidine-1-oxide radical oxidation system, adding the original ramie, and soaking at room temperature; adding ethanol into the degumming liquid to terminate oxidation reaction; adding sodium hydroxide into the degumming liquid, heating, and preserving heat after heating to 100 DEG C; taking out fiber in the degumming liquid, performing treatment by using a reducing agent, applying oil and drying to obtain the ramie fiber. The ramie is oxidized and degummed by the TEMPO system, so that the technical effects of shortening the degumming time, reducing the degumming energy consumption and reducing the COD value of degumming waste water are achieved.

Description

technical field [0001] The invention relates to a method for preparing ramie fiber by using a 2,2,6,6-tetramethylpiperidine-1-oxide free radical oxidation system, which belongs to the technical field of textile processing. Background technique [0002] Ramie is an important fiber crop, commonly known as "Chinese grass", and is a unique textile material in China. It has strong adaptability to climate and soil, short harvest period, and high economic value. Ramie fiber is long, high strength, white and mercerized in color. In the field of clothing, its fabric has the characteristics of crispness, coolness, fast moisture absorption and heat dissipation, and not close-fitting, and can be processed into fine or rough fabrics. In the field of industrial use, it can be used as a raw material for aircraft wing cloth, fishing nets, high-grade paper, gunpowder, and rayon due to its corrosion resistance, insulation, and antibacterial properties. [0003] The main component of ramie i...

Claims

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Application Information

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IPC IPC(8): D01C1/02
Inventor 孟超然郁崇文黄晶崔启璐张斌
Owner DONGHUA UNIV
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