Method for preparing regenerated straw fiber by directly spinning straw

A technology of straw fiber and straw is applied in the field of fiber spinning preparation, which can solve the problems of waste of biomass resources and environmental pollution, and achieve the effects of shortening the production process, solving the problem of environmental pollution and good thermal stability.

Inactive Publication Date: 2011-08-10
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Except for a few straws that are used as livestock feed, farm manure and rural fuel, most straws are piled up or directly burned, which not only causes a huge waste of biomass resources, but also brings serious environmental pollution problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The method for preparing regenerated straw fiber by direct spinning of straw comprises the following steps:

[0025] 1) After washing the straw stalks with water, air-dry them, cut them into short stems with a length of 5 mm, pulverize them with a pulverizer, put them into a pressure cooker of 1.2 MPa and boil them in water for 10 minutes, filter and dehydrate to remove the extractables, and obtain short fibers; then use the short fibers with H with a pH of 8-9 2 o 2 Bleaching solution bleaching (bleaching process), liquor ratio 1:50 (ie H 2 o 2 weight ratio of bleaching solution to short fibers), bleaching time was 20 minutes, and the leached matter was filtered out with a 200-mesh filter screen, dried after washing 3 times, and crushed again to obtain pretreated straw powder;

[0026] 2) Mix the pretreated straw powder with 1-butyl-3-methylimidazole chloride ([bmim]Cl) at a mass ratio of 1:30, preheat and swell at 100°C, and raise the temperature to 120°C in an oil...

Embodiment 2

[0031] The method for preparing regenerated straw fiber by direct spinning of straw comprises the following steps:

[0032] 1) According to the mass ratio of rice straw and cotton straw as 1:1, select rice straw and cotton straw, and process the cotton straw into cotton linters; wash and air-dry the rice straw, cut into short stems with a length of 5 mm, and grind them with a pulverizer Put it into a 1.2MPa pressure cooker and boil for 10 minutes after crushing, filter and dehydrate to remove the dissolved matter, and obtain short straw fibers; then short straw fibers and cotton linters are respectively treated with H 2 o 2 Bleaching solution bleaching (bleaching process), liquor ratio 1:50 (ie H 2 o 2 The weight ratio of bleaching solution to short fiber), bleaching time 20 minutes, and filter out the dissolved matter with 200 mesh filter screen, dry after repeated washing 5 times, both are pulverized together to obtain the mixed powder of pretreated rice straw and cotton l...

Embodiment 3

[0038] The method for preparing regenerated straw fiber by direct spinning of straw comprises the following steps:

[0039] 1) Wash the straw stalks with water and air-dry them, cut them into short stems with a length of 5 mm, pulverize them with a pulverizer, put them into a pressure cooker of 1.2 MPa, boil them in water for 10 minutes, filter and dehydrate to remove the dissolved matter, and obtain short fibers; crush them again to obtain pretreatment straw powder;

[0040] 2) Mix the pretreated straw powder with 1-butyl-3-methylimidazole chloride ([bmim]Cl) at a mass ratio of 1:30, preheat and swell at 95°C, and raise the temperature to 120°C in an oil bath under mechanical stirring. ℃, temperature control, slowly add dimethyl sulfoxide (DMSO) dropwise, add 5mL dimethyl sulfoxide for every 0.5g of straw powder, continue to stir until the solution becomes viscous, until the solution is observed under a polarizing microscope to completely dissolve the cellulose, Obtain high-...

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PUM

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Abstract

The invention discloses a method for preparing regenerated straw fiber by directly spinning straw, belonging to the field of spinning of regenerated fiber. The method is characterized by comprising the following steps of: (1) washing straw with water, drying in the air, smashing, bleaching and filtering to obtain pretreated straw powder; (2) mixing the pretreated straw powder with chlorinated 1- butyl-3-methyl glyoxaline in the mass ratio of 1:30, preheating, swelling, dropwise adding dimethyl sulfoxide, adding 5 mL of dimethyl sulfoxide into every 0.5g of straw powder and stirring at controlled temperature to obtain high-viscosity spinning liquid; (3) filtering the high-viscosity spinning liquid, defoaming, spirally extruding, spraying by using a porous spinning head, drawing and curing in a coagulation bath to obtain fiber yarn, wherein the coagulation bath is water or an ion liquid aqueous solution with the concentration of 1-60 percent, the temperature of the coagulation bath is between 0 DEG C and 90 DEG C and the spinning speed is between 5 meters per minute and 150 meters per minute; and (4) drawing the fiber yarn, washing with water, applying oil and drying to obtain the regenerated straw fiber. The method has the characteristics of simple process, small equipment investment and low running cost.

Description

technical field [0001] The invention belongs to the field of regenerated fiber spinning, in particular to a preparation method of fiber spinning which retains the original ecological structure of plants. Background technique [0002] my country is a large agricultural country, with about 700 million tons of agricultural waste produced every year, including 1.1 tons of wheat straw (the output of wheat straw accounts for about 18% of the total straw), 180 million tons of rice straw, 13 million tons of cotton stalk, soybean 15 million tons of straw. Except for a few straws that are used as livestock feed, farm manure and rural fuel, most straws are piled up or directly burned, which not only causes a huge waste of biomass resources, but also brings serious environmental pollution problems. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing regenerated straw fiber by direct spinning of straw, which has the characteristi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/02D01C1/00D01D5/06
Inventor 王晓广吴海燕王霞汤月华
Owner WUHAN TEXTILE UNIV
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