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Biological extraction method of pineapple leaf fibers

A pineapple leaf fiber, biological extraction technology, applied in fiber processing, fiber mechanical separation, textiles and papermaking, etc., can solve the problems of limited removal of non-cellulose substances, high corrosion of equipment, environmental pollution, etc., to avoid fiber damage and/or loss, good quality, high softness effect

Active Publication Date: 2020-11-27
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality and stability of pineapple leaf fibers produced by chemical methods still need to be improved, and the discharge of chemical reagents pollutes the environment, damages fibers, and is more corrosive to equipment
The physical method is to rely on physical external force to remove the colloid in the pineapple leaf fiber. At present, there are mainly ultrasonic method and flash explosion method, but the removal effect of physical method on non-cellulose substances is limited, and it must be combined with chemical method to effectively extract pineapple. leaf fiber

Method used

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  • Biological extraction method of pineapple leaf fibers
  • Biological extraction method of pineapple leaf fibers
  • Biological extraction method of pineapple leaf fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) mechanical treatment of pineapple blades: cut off the thorns on pineapple blade edges, adopt the mode of beating or rolling to make pineapple blades crack, and mechanically scrape off most of the mesophyll;

[0035] (II) Microbial treatment: inoculate Aspergillus niger spores in Chapei medium, culture at 36°C, 200r / min, shaker for 24h to obtain spore suspension, add 50mL / kg pineapple leaves to the mechanically treated pineapple leaves Spray the spore suspension of Aspergillus niger HYA4 evenly, incubate at 35°C for 4 days, wash with water, dry, knead and loosen to obtain the pineapple leaf fiber raw material;

[0036] (1) Enzyme treatment: the liquor ratio is 1:50 (kg / L), the pineapple leaf fiber raw material is added to pH 5.0, in the enzyme liquid containing 0.3wt% laccase and 0.3wt% xylanase, 45 ℃, enzymatic treatment for 4h;

[0037] (2) Enzyme inactivation and rinsing: Prepare a rinsing solution of 5g / L sodium silicate, 1.5g / L sodium hydroxide, and 10g / L hydro...

Embodiment 2

[0041] (1) mechanical treatment of pineapple blades: cut off the thorns on pineapple blade edges, adopt the mode of beating or rolling to make pineapple blades crack, and mechanically scrape off most of the mesophyll;

[0042](II) Microbial treatment: inoculate Aspergillus niger spores in Chapei medium, 30°C, 200r / min, shaker culture for 30h to obtain spore suspension, add 10mL / kg pineapple leaves to the mechanically treated pineapple leaves Spray the spore suspension of Aspergillus niger HYA4 evenly, incubate at 30°C for 7 days, wash with water, dry, knead and loosen to obtain the pineapple leaf fiber raw material;

[0043] (1) Enzyme treatment: according to the bath ratio of 1:50 (kg / L), the pineapple leaf fiber raw material is added to pH 5.0, in the enzyme solution containing 0.2wt% laccase and 0.2wt% xylanase, 50 ℃, enzymatic treatment for 4h;

[0044] (2) Enzyme inactivation and rinsing: Prepare a rinsing solution of 5g / L sodium silicate, 1g / L sodium hydroxide, and 8g / L...

Embodiment 3

[0048] (1) mechanical treatment of pineapple blades: cut off the thorns on pineapple blade edges, adopt the mode of beating or rolling to make pineapple blades crack, and mechanically scrape off most of the mesophyll;

[0049] (II) Microbial treatment: inoculate Aspergillus niger spores in liquid medium, culture on a shaker for 28 hours at 32°C and 200r / min to obtain a spore suspension, and add 50mL / kg of pineapple leaves to the mechanically treated pineapple leaves evenly Spray the spore suspension of Aspergillus niger HYA4, incubate at 35°C for 7 days, wash, dry, knead, and fluff to obtain the pineapple leaf fiber raw material;

[0050] (1) Enzyme treatment: the liquor ratio is 1:40 (kg / L), the pineapple leaf fiber raw material is added to pH 4.5, in the enzyme liquid containing 0.4wt% laccase and 0.4wt% xylanase, 50 ℃, enzymolysis treatment for 5h;

[0051] (2) Enzyme inactivation and rinsing: Prepare a rinsing solution of 4g / L sodium silicate, 1.5g / L sodium hydroxide, and...

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Abstract

The invention belongs to the technical field of renewable resource application, and particularly relates to a biological extraction method of pineapple leaf fibers. The biological extraction method comprises the following steps of (1), enzyme treatment, specifically, adding a pineapple leaf fiber raw material into an enzyme solution, and carrying out enzymolysis treatment; (2), enzyme deactivationand rinsing, specifically, adding the fiber subjected to enzymolysis into a rinsing solution, and treating at 80-95 DEG C for 60-90 minutes; (3), ultrasonic treatment, specifically, carrying out ultrasonic treatment on the pineapple leaf fibers for 60-90 minutes at normal temperature; and (4), drying, specifically, drying the pineapple leaf fibers at 50-80 DEG C. According to the biological extraction method of the pineapple leaf fibers, most of substances such as lignin and hemicellulose in the pineapple leaf fiber raw material (namely crude fiber) are decomposed by the biological enzyme, sothat the residual gum rate of the treated pineapple leaf fibers reaches 25.53% or below, the breaking strength of the fibers reaches 44.81 cN / tex or above, and the fineness is 650 counts or above.

Description

technical field [0001] The invention belongs to the technical field of renewable resources application, and in particular relates to a biological extraction method of pineapple leaf fiber. Background technique [0002] Pineapple (pineapple), also known as pineapple, is a perennial herb native to Brazil in South America. my country has a history of nearly 400 years of cultivating pineapples. The planting area of ​​pineapples in my country is about 70,000 hectares, and the total amount of pineapple stems and leaves is about 10 million tons. Pineapple leaf fiber is commonly called pineapple hemp, also known as pineapple fiber, which belongs to leaf vein fiber. Because of its internal porous and hollow structure, pineapple leaf fiber has good fast water absorption and evaporation properties, and is an excellent new textile material for natural health care. Pineapple leaf fiber can be used in the field of industrial textiles such as garments, apparel and non-woven fabrics for s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01C1/04D01B1/18D01B1/22
CPCD01C1/04D01B1/18D01B1/22
Inventor 田英华刘晓兰李闯吴红艳
Owner QIQIHAR UNIVERSITY
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