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Method for preparing viscose fiber by using pineapple leaf

A viscose fiber and pineapple leaf technology, applied in the field of viscose fiber manufacturing, can solve the problems of high process requirements, 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

However, because the cellulose fibrils in pineapple leaves are short and thick, and the content of hemicellulose and lignin is relatively high, the cellulose fibers directly extracted from pineapple leaves for textile purposes require high technological requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The sorted pineapple leaves with thorns removed from the edges of the pineapple leaves are mechanically beaten and then combed to separate the mesophyll of the pineapple leaves, and the leaves are washed with water to obtain rough pineapple leaf fibers. The crude fiber is immersed in an aqueous solution containing 4% white rot fungus at a ratio of 1:5 by weight of the crude fiber to the microbial solution, and fermented at 35° C. for 15 days.

[0024] The fermented crude fiber is washed with water, immersed in a 3% by weight aqueous solution of hydrogen peroxide to cook, the weight ratio of the pineapple leaf cellulose fiber to the hydrogen peroxide solution is 1:7, and the cooking temperature is 80°C. The time is 3 hours to obtain pure pineapple leaf cellulose. Alpha cellulose ≥ 97%

Embodiment 2

[0026] The sorted pineapple leaves with thorns removed from the edges of the pineapple leaves are mechanically beaten and then combed to separate the mesophyll of the pineapple leaves, and the leaves are washed with water to obtain rough pineapple leaf fibers. The crude fiber is immersed in an aqueous solution containing 4% bacillus at a ratio of 1:10 by weight of the crude fiber to the microbial solution, and fermented at 40° C. for 7 days.

[0027] The fermented crude fiber is washed with water, soaked in a 2% by weight aqueous solution of hydrogen peroxide and cooked, the weight ratio of the pineapple leaf cellulose fiber to the aqueous hydrogen peroxide solution is 1:10, and the cooking temperature is 100°C. The time is 2 hours to obtain pure pineapple leaf cellulose. Alpha cellulose ≥ 96%

Embodiment 3

[0029] The sorted pineapple leaves with thorns removed from the edges of the pineapple leaves are mechanically beaten and then combed to separate the mesophyll of the pineapple leaves, and the leaves are washed with water to obtain rough pineapple leaf fibers. The crude fiber is immersed in an aqueous solution containing 1% bacillus according to the weight ratio of the crude fiber to the microbial solution of 1:8, and fermented at 30° C. for 30 days.

[0030] The fermented crude fiber is washed with water, immersed in a 3% by weight aqueous solution of hydrogen peroxide to cook, the weight ratio of the pineapple leaf cellulose fiber to the hydrogen peroxide solution is 1:8, and the cooking temperature is 90°C. The time is 3 hours to obtain pure pineapple leaf cellulose. Alpha cellulose is 96.5%.

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Abstract

The invention discloses a method for preparing viscose fibers by using pineapple leaves, comprising the following steps: firstly, sorting the pineapple leaves, and removing stings at the edge of each pineapple leaf; secondly, adopting mechanical knock or roll compacting, scraping mesophyll colloid of the pineapple leaves through a combing method, and obtaining crude pineapple leaf cellulose fibers through washing; thirdly, removing residual colloid in microorganism mould solution through fermentation treatment and hydrogen peroxide treatment; fourthly, preparing alkali cellulose; fifthly, yellowing and dissolving the alkali cellulose to manufacture spinning slurry; sixthly, defoaming the spinning slurry; and seventhly, spinning with a wet method. The invention has the advantages that firstly, waste pineapple leaves are fully utilized to prepare the viscose fibers, and the economic value of pineapples is enhanced; secondly, hydrogen peroxide is used to replace sodium sulfite, sodium bisulfite, ammonium oxalate and ammonium citrate in a method patent (ZL200510111703.2) of protobiont-chemistry, and drained waste water has no inorganic matter and is full of biodegradable polysaccharide compounds. Therefore, the invention more accords with the environmental requirements.

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 pineapple leaves. Background technique [0002] Pineapple (also known as pineapple in my country) is a perennial herb whose origin is Brazil in South America. It is one of the three famous fruits in tropical regions. my country's main production areas are in Guangdong, Guangxi, Hainan, Yunnan, Fujian, Taiwan and other places, with an output of more than 1 million tons, and the quantity of pineapple leaves is even greater. However, most of them become agricultural wastes because they have not been fully utilized. These wastes are left to rot in the fields, causing soil degradation and other adverse effects. Rational development and utilization of pineapple leaf fiber can be described as turning waste into treasure, which is in line with the policies of sustainable development and circular econom...

Claims

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Application Information

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