Method for preparing cotton stalk skin fiber for spinning with combination between steam explosion and alkali treatment

A technology of combining cotton stalks and husks, applied in the field of textile fiber preparation, can solve the problems of thick cotton stalk husks, waste of resources, burning, etc.

Active Publication Date: 2014-09-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a long period of time, most of the cotton stalks are burned as waste, resulting in waste of resources
[0003] At present, the patents for preparing cotton stalk husk fibers mainly include: (1) Alkali treatment to prepare cotton stalk husk fibers, such as the invention patent "A Method for Preparing Cotton stalk husk cellulose fibers by direct degumming of cotton stalks" (CN102286789A) introduces the use of alkali The method of treatment prepares cotton stalk skin fiber; (2) biological enzyme pr...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) cutting: the cotton stalk bark is cut into 8cm long fragments;

[0028] (2) Soaking: put the cut cotton stalk skin in clear water with a liquor ratio of 1:20, and soak for 24 hours;

[0029] (3) Steam flash explosion: put the soaked cotton stalk skin into the flash explosion tank, feed saturated water vapor, make the saturated water vapor pressure reach 2.0MPa, maintain the saturated water vapor pressure for 120s, and then flash instantly within 0.0875s ;

[0030] (4) hot water washing: the cotton stalk sheath fiber after the flash explosion is washed in hot water at 90° C. for 1 hour, the bath ratio is 1:40, and the aperture is 20 mesh to filter;

[0031] (5) lye scouring: process the cotton stalk skin fiber obtained in step (4) with KOH solution, the bath ratio is 1:30, the temperature is 100°C, the KOH solution mass percentage concentration is 15%, and the treatment time is 120min;

[0032] (6) Washing and neutralization: the cotton stalk husk fiber after alkal...

Embodiment 2

[0038] (1) cutting: the cotton stalk bark is cut into 9cm long fragments;

[0039] (2) Soaking: put the cut cotton stalk skin in clear water with a liquor ratio of 1:15, and soak for 18 hours;

[0040] (3) Steam flash explosion: put the soaked cotton stalk skin into the flash explosion tank, feed saturated water vapor, make the saturated water vapor pressure reach 2.5MPa, maintain the saturated water vapor pressure for 60s, and then flash instantly within 0.0875s ;

[0041] (4) Washing with hot water: the cotton stalk sheath fiber after the flash explosion was washed in hot water at 85°C for 1.5 hours, the bath ratio was 1:30, and the aperture was filtered with a 20-mesh screen;

[0042] (5) lye scouring: process the cotton stalk skin fiber obtained in step (4) with KOH solution, the bath ratio is 1:20, the temperature is 80°C, the KOH solution mass percentage concentration is 10%, and the treatment time is 150min;

[0043] (6) Washing and neutralization: the cotton stalk hu...

Embodiment 3

[0049] (1) cutting: the cotton stalk bark is cut into 10cm long fragments;

[0050] (2) Soaking: put the cut cotton stalk skin in clear water with a liquor ratio of 1:10, and soak for 12 hours;

[0051] (3) Steam flash explosion: put the soaked cotton stalk skin into the flash explosion tank, feed saturated water vapor, make the saturated water vapor pressure reach 1.5MPa, maintain the saturated water vapor pressure for 180s, and then flash instantly within 0.0875s ;

[0052] (4) hot water washing: the cotton stalk sheath fiber after the flash explosion was washed in hot water at 80°C for 2 hours, the bath ratio was 1:20, and the aperture was 20 mesh to filter;

[0053](5) lye scouring: process the cotton stalk skin fiber obtained in step (4) with KOH solution, the bath ratio is 1:10, the temperature is 85°C, the KOH solution mass percentage concentration is 5%, and the treatment time is 140min;

[0054] (6) Washing and neutralization: the cotton stalk husk fiber after alkal...

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PUM

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Abstract

The invention relates to a method for preparing a cotton stalk skin fiber for spinning with combination between steam explosion and alkali treatment. The technological process comprises the steps of cotton stalk skin cutting, soaking, steam explosion, hot water cleaning, alkali liquor boiling and refining, washing, neutralizing, bleaching, washing, lubricating treatment, washing, airing, combing and cotton stalk skin fiber obtaining. The fineness of the cotton stalk skin fiber treated through the method can reach about 27 dtex to the minimum, and the cellulose content of the cotton stalk skin fiber treated through the method can reach about 82% to the maximum. Compared with traditional alkali boiling preparation of the cotton stalk skin fiber, the cotton stalk skin is separated through steam explosion pretreatment, a steam explosion technological test stand is different from a traditional steam explosion device, the explosion time is quite short and is 0.0875 s, the acting force on the fiber during the explosion moment is larger, and the obtained fiber is finer.

Description

technical field [0001] The invention relates to a method for preparing textile cotton stalk sheath fibers by combining steam flash explosion and alkali treatment, which belongs to the field of textile fiber preparation. Background technique [0002] my country is a big cotton producing country, and the cotton straw resources are very rich. Cotton stalk is a renewable resource, and its cellulose content is about 40%. Extracting cotton stalk fibers suitable for textile and composite materials from cotton stalk husks will help increase the value of cotton crops. However, in a long period of time, most of the cotton stalks are burned as waste, resulting in a waste of resources. [0003] At present, the patents for preparing cotton stalk husk fibers mainly include: (1) Alkali treatment to prepare cotton stalk husk fibers, such as the invention patent "A Method for Preparing Cotton stalk husk cellulose fibers by direct degumming of cotton stalks" (CN102286789A) introduces the use...

Claims

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Application Information

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IPC IPC(8): D01B1/10D01C1/02
Inventor 侯秀良董震张莉李琪超
Owner JIANGNAN UNIV
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