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Method for preparing viscose fiber by sisal leaves

A technology of viscose fiber and sisal, which is applied in the field of synthetic fiber manufacturing, can solve serious environmental pollution and other problems, achieve the effect of improving economic value and meeting environmental protection requirements

Inactive Publication Date: 2009-11-11
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the cellulose pulp used for viscose uses concentrated alkali and sodium sulfite to decompose lignin, hemicellulose and pectin in plant fibers to obtain α-cellulose, which seriously pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for producing viscose fiber with sisal leaves, comprising the following steps:

[0027] (1) sorting sisal leaves;

[0028] (2) mechanically knocking or rolling is adopted, and the mesophyll jelly of the sisal leaves is scraped off by the carding method, and the thick sisal leaf cellulose fibers are obtained by washing;

[0029] (3) microbial and hydrogen peroxide treatment to remove residual colloid;

[0030] (4) Preparation of alkali cellulose;

[0031] (5) Alkali cellulose yellowing and dissolving to prepare spinning slurry;

[0032] (6) Spinning slurry degassing;

[0033] (7) Wet spinning.

[0034] The sorted sisal leaves are mechanically beaten and then combed and separated, the mesophyll gum of the sisal leaves is scraped off, and the leaves are washed with water to obtain rough sisal leaf fibers. The crude fiber is immersed in an aqueous solution containing 3% bacillus according to the weight ratio of the crude fiber to the mold solution being 1:7, a...

Embodiment 2

[0037] The sorted sisal leaves are mechanically tapped and then combed and separated to scrape off the mesophyll gum of the sisal leaves, and the leaves with the mesophyll gum removed are washed with water to obtain rough sisal leaf fibers. According to the weight ratio of the crude fiber to the mold solution being 1:5, the crude fiber is immersed in an aqueous solution containing 2% bacillus, and fermented at 40° C. for 30 days.

[0038] The fermented crude fiber is washed with water, soaked in 1% by weight hydrogen peroxide solution and cooked, the weight ratio of sisal leaf cellulose fiber and hydrogen peroxide solution is 1:7, and the cooking temperature is 80°C , the time is 4 hours to obtain pure sisal leaf alpha cellulose≥96%.

Embodiment 3

[0040] The sorted sisal leaves are mechanically tapped and then combed and separated to scrape off the mesophyll gum of the sisal leaves, and the leaves with the mesophyll gum removed are washed with water to obtain rough sisal leaf fibers. According to the weight ratio of the crude fiber to the mold solution being 1:10, the crude fiber is immersed in an aqueous solution containing 41% white rot fungus, and fermented at 40° C. for 10 days.

[0041] The fermented crude fiber is washed with water, soaked in a 4% by weight aqueous solution of hydrogen peroxide for cooking, the weight ratio of sisal leaf cellulose fiber and hydrogen peroxide solution is 1:7, and the cooking temperature is 100°C , the time is 2 hours to obtain pure sisal leaf alpha cellulose is 96.5%.

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Abstract

The invention relates to a method for preparing viscose fiber by sisal leaves. The method comprises the following steps: (1) sorting the sisal leaves; (2) adopting mechanical knocking or roll compacting, carrying out devillication with a carding method so as to scrap off diachyma colloid of the sisal leaves, carrying out water washing, and obtaining sisal leaves cellulose base fiber; (3) carrying out fermentation treatment in a microorganic mould solution and then peroxide treatment so as to remove residual colloid; (4) preparing soda cellulose; (5) etiolating and dissolving the soda cellulose to obtain filature serosity; (6) defoaming the filature serosity; and (7) wet spinning. The invention has the advantages that the method fully utilizes the waste sisal leaves to prepare the viscose fiber and improves the economic value of the sisal leaves; peroxide is used for replacing sodium sulfite, sodium bisulfite, ammonium oxalate, ammonium citrate in the ZL200510111703.2 biological-chemical method patent; and the discharged sewage contains no inorganic matters but polysaccharide compounds which are biologically degradable, and more conforms to the environment friendly requirement.

Description

technical field [0001] The invention belongs to the technical field of synthetic fiber production, in particular to a method for producing viscose fiber by extracting cellulose from sisal leaves. Background technique [0002] Sisal, also known as sisal, is a kind of agave hemp, belonging to the genus Agave Linnaeus of the family Agavaceae. It is named for its shape resembling a sword. It is native to Central America and has a cultivation history of more than 80 years in my country. As early as 1901, my country introduced it from the Philippines to Hengchun, Kaohsiung, and Qishan in Taiwan for cultivation. In 1928, some overseas Chinese imported dozens of sisal seedlings from the Philippines to Hainan Island for planting, and later spread to other regions. At present, the planting area of ​​sisal in my country is 15,000 hm 2 , The total fiber output is 37,000 tons, ranking first in the world, and the planting areas are mainly distributed in Guangdong, Guangxi, Hainan, Fujia...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01D1/10D01D5/06D01B1/10D01C1/00D01F2/06C08B9/00
Inventor 郁崇文吴苏明章倩章悦庭张元明
Owner DONGHUA UNIV
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