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Preparation method of cotton bast fiber and chitosan composite nonwoven fabric for filtering

The technology of non-woven fabric and cotton stalk skin is applied in the field of preparation of cotton stalk skin fiber and chitosan composite non-woven fabric for filtration, which can solve the problems of complex electrospinning process, unsuitable for industrialization, and not easy to degrade, etc. The effect of mechanical properties and filtration efficiency, reducing damage and enhancing mechanical properties

Active Publication Date: 2018-01-19
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Composite antibacterial nanofiber air filter materials are mainly prepared by electrospinning, and the filtering effect of the material is good, but the electrospinning process is complex and not suitable for industrialization and mass production
Most of the raw materials used are petroleum-based chemical materials such as PP, which are not easy to degrade, and will cause environmental pollution after the materials are discarded

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of cotton bast fiber and chitosan composite nonwoven fabric for filtering
  • Preparation method of cotton bast fiber and chitosan composite nonwoven fabric for filtering
  • Preparation method of cotton bast fiber and chitosan composite nonwoven fabric for filtering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) cutting: the cotton stalk bark is cut into 1.5cm fragments;

[0061] (2) Soaking: put the cut cotton stalk skin in clear water with a liquor ratio of 1:15, and soak for 2 hours at a water temperature of 80°C;

[0062] (3) Fractional flash explosion: put the soaked cotton stalks into the flash explosion material bin, inject saturated water vapor, make the saturated water vapor pressure reach 2MPa, maintain the saturated water vapor pressure for 60s and then flash explosion; repeat this flash Burst step, burst 3 times;

[0063] (4) Cleaning: the cotton stalk skin fiber after the flash explosion is cleaned 5 times at room temperature to remove massive impurities;

[0064] (5) Beating: adopt frequency modulation beater to beat, control the slurry concentration to be 60%, after dispersing for 5 minutes, beat for 15 minutes;

[0065] (6) Manufacture: Weigh 4g of the slurry that has been beaten and dried to dryness, add water to 2L, and then use a decomposer to decompose...

Embodiment 2

[0074] (1) cutting: the cotton stalk bark is cut into 2cm fragments;

[0075] (2) Soaking: put the cut cotton stalk skin in clear water with a liquor ratio of 1:20, and soak for 3 hours at a water temperature of 75°C;

[0076] (3) Fractional flash explosion: put the soaked cotton stalks into the flash explosion material bin, feed saturated water vapor, make the saturated water vapor pressure reach 1.5MPa, maintain the saturated water vapor pressure for 60s and then flash explosion; repeat this process Flash explosion step, explode 3 times;

[0077] (4) Cleaning: the cotton stalk skin fiber after the flash explosion is cleaned 5 times at room temperature to remove massive impurities;

[0078] (5) Beating: adopt frequency modulation beater to beat, control the slurry concentration to be 60%, after dispersing for 5 minutes, beat for 20 minutes;

[0079] (6) Manufacture: Weigh 5g of the pulp that has been beaten and dried to dryness, add water to 2L, and then use a decomposer to...

Embodiment 3

[0087] (1) cutting: the cotton stalk bark is cut into 2cm fragments;

[0088] (2) Soaking: put the cut cotton stalk skin in clear water with a liquor ratio of 1:30, and soak for 3 hours at a water temperature of 70°C;

[0089] (3) Fractional flash explosion: put the soaked cotton stalks into the flash explosion material bin, inject saturated water vapor, make the saturated water vapor pressure reach 2MPa, maintain the saturated water vapor pressure for 60s and then flash explosion; repeat this flash Burst step, burst 3 times;

[0090] (4) Cleaning: the cotton stalk skin fiber after the flash explosion is cleaned 5 times at room temperature to remove massive impurities;

[0091] (5) Beating: use a frequency modulation beating machine to beat, control the concentration of the slurry to less than 60%, and after dispersing for 5 minutes, beat for 10 minutes;

[0092] (6) Manufacture: Weigh 2 g of the slurry that has been beaten and dried to dryness, add water to 2 L, and then us...

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Abstract

The invention discloses a preparation method of cotton bast fiber and chitosan composite nonwoven fabric for filtering, and belongs to the technical field of fiber materials. Cotton bast is separatedthrough steam flash-explosion pretreatment, formation is conducted by a papermaking method, and chitosan is added to enhance the mechanical property and the filtering efficiency. The preparation method is simple, convenient and environment-friendly in process flow and adapts to industrialized production. The nonwoven fabric adopts lignin-enriched cotton bast fiber and chitosan as raw materials, sothat the nonwoven fabric has high antibacterial property. The cotton bast and the chitosan are biology-based materials and can be degraded in the natural environment after use, so that environmentalburden is reduced and the problem that the electrostatic spinning method is difficult in industrialized and mass production is solved.

Description

technical field [0001] The invention relates to a preparation method of a cotton stalk skin fiber and chitosan composite non-woven fabric for filtering, and belongs to the technical field of fiber materials. Background technique [0002] China is the largest cotton producer in the world, and its annual cotton production rate accounts for about 30% of the world. The annual output of cotton stalks is as high as 20 million tons, while the utilization rate of resources only accounts for about 5%. Cotton stalks can be processed to make feed and fertilizer, produce ethanol, and be used in textiles, composite materials and other fields. 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 utilization of cotton stalk fiber mainly includes: (1) Alkali treatment to prepare cotton stalk fiber, such as the invention patent "A Method for Preparing Cotton Stalk Cellulose Fiber by Direct Degumming of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12D21H17/24D21H21/36D21B1/36
CPCD21B1/36D21H11/12D21H17/24B01D39/18B01D2239/10B01D2239/0442D21H21/18D21H27/08D21D1/02D21D1/40D21F13/00B01D2239/1233B01D2239/0618B01D2239/1225D21H21/36
Inventor 侯秀良杨丹马博谋潘刚伟刘国维
Owner JIANGNAN UNIV
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