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Method for degelatinizing hemp fiber with biological enzyme degelatinizing method combined with chemical degelatinizing method

A hemp fiber and bio-enzyme technology, which is applied in fiber treatment, fiber chemical post-treatment, plant raw materials, etc., can solve the problems of long chemical degumming process, poor product quality stability, and difficult control of degumming quality. Bleaching process requirements, cost green and environmental protection, and the effect of expanding the hemp production chain

Inactive Publication Date: 2014-10-15
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hemp degumming technology currently used at home and abroad needs to be further improved. The commonly used chemical degumming method has a long process, resulting in high energy consumption, high water consumption, high cost, and serious pollution.
Natural water retting method pollutes waters, low quality and low efficiency
The advantages of microbial degumming are that the process is simple and easy, no special equipment is required, no pollution, and the quality of the dried hemp produced is good, but the dried hemp after degumming still contains more colloids, the degumming quality is difficult to control, and the product quality stability is poor. At present, microbial degumming It cannot be directly applied to industrial production, and it needs to be supplemented by chemical methods for degumming
The physical degumming method can only degumming hemp to a certain extent, and must be combined with other methods to complete the degumming process

Method used

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  • Method for degelatinizing hemp fiber with biological enzyme degelatinizing method combined with chemical degelatinizing method
  • Method for degelatinizing hemp fiber with biological enzyme degelatinizing method combined with chemical degelatinizing method
  • Method for degelatinizing hemp fiber with biological enzyme degelatinizing method combined with chemical degelatinizing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Combined degumming process of hemp fiber with bio-enzyme chemical method

[0030] (1) Weigh 0.996g of untreated hemp fiber and place it in a 50ml beaker, add 30ml of deionized water, and bathe in a 50°C water bath for 10min. Fibers were removed after 10 min. Put the dried hemp fiber in a 50ml beaker, with a bath ratio of 1:30, add 30ml of citric acid-sodium citrate buffer solution with a pH of 3.6 in the beaker, weigh 0.06g of pectinase, Put 0.09g of xylanase in a beaker to make the concentrations 2.0g / L and 3.0g / L respectively, place the beaker in a water bath at 40°C for 30min, then take out the fibers, wash them in cold water at 15°C, and dry them after washing. Dry and weigh.

[0031] Put 0.878g of enzyme-treated hemp fiber into a 50ml beaker of known mass, and add 26.34ml of deionized water at a liquor ratio of 1:30. Add 0.04g of sodium carbonate, 0.053g of sodium silicate, and 0.08g of sodium sulfite to the beaker to make the concentrations respectively 1.5g / L,...

Embodiment 2

[0033] Combined degumming process of hemp fiber with bio-enzyme chemical method

[0034] Weigh 1.005g of untreated hemp fiber and place it in a 50ml beaker, add 30ml of deionized water, and bathe in a 50°C water bath for 10min. Fibers were removed after 10 min. Put the dried hemp fiber in a 50ml beaker, the bath ratio is 1:30, add 30ml of citric acid-sodium citrate buffer solution with a pH of 4.6 in the beaker, weigh 0.09g of pectinase, Put 0.12g of xylanase in a beaker to make the concentrations 3.0g / L and 4.0g / L respectively, place the beaker in a water bath at 50°C for 60min, then take out the fiber, wash it in cold water at 15°C, and dry it after washing. Dry and weigh.

[0035] Put 0.845 g of enzyme-treated hemp fiber into a 50-ml beaker of known mass, and add 25.35 ml of deionized water at a liquor ratio of 1:30. Add 0.038g of sodium carbonate, 0.05g of sodium silicate, and 0.076g of sodium sulfite to the beaker to make the concentrations respectively 1.5g / L, 2.0g / L,...

Embodiment 3

[0037] Hemp fiber biological enzyme degumming

[0038] Weigh 0.984g of untreated hemp fiber and place it in a 50ml beaker, add 30ml of deionized water, and bathe in a 50°C water bath for 10min. Fibers were removed after 10 min. Put the dried hemp fiber in a 50ml beaker, the bath ratio is 1:30, add 30ml of citric acid-sodium citrate buffer solution with a pH of 5.6 in the beaker, weigh 0.03g of pectinase, Put 0.15g of xylanase in a beaker to make the concentrations 1.0g / L and 5.0g / L respectively, place the beaker in a water bath at 60°C for 90min, then take out the fibers, wash them in cold water at 15°C, and dry them after washing. Dry and weigh.

[0039]Put 0.872 g of enzyme-treated hemp fiber into a 50 ml beaker of known mass, and add 26.16 ml of deionized water at a liquor ratio of 1:30. Add 0.039g of sodium carbonate, 0.052g of sodium silicate, and 0.078g of sodium sulfite to the beaker to make the concentrations 1.5g / L, 2.0g / L, and 3.0g / L respectively, and then add 0.9...

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Abstract

The invention relates to a method for degelatinizing hemp fiber with the biological enzyme degelatinizing method combined with the chemical degelatinizing method. Citric acid-sodium citrate is used as a buffer solution; pectolase and zytase are used together for performing enzyme degelatinizing on hemp fiber; sodium hydroxide solution is used for performing secondary degelatinizing; through the two steps of degelatinizing, the high efficiency and specificity of pectolase are used for effectively removing most pectin in fiber; the effect of zytase is used for achieving a good effect of removing lignose when the sodium hydroxide solution is subjected to alkali scouring. The method provided by the invention realizes the effect that in the fiber degelatinizing process, acid is no longer used for performing pretreatment on fiber, so that the treatment of pretreatment wastewater is reduced; moreover, the biological enzyme degelatinizing method is remarkable in effect; when the method is adopted to performing degelatinizing on hemp fiber, relatively high breaking strength of the hemp fiber is ensured, the whiteness is also remarkably increased, use of sodium hydroxide is reduced, and discharge of scouring wastewater is reduced.

Description

technical field [0001] The invention relates to a method for degumming hemp fibers, in particular to a method for degumming hemp fibers by combining biological enzyme degumming and chemical degumming. Background technique [0002] As a green and environmentally friendly ecological fiber, hemp fabrics not only have natural antibacterial, ultraviolet radiation shielding, moisture absorption and perspiration, softness and comfort, skin care and cleaning, odor absorption and wear resistance, but also have noble, elegant, unpretentious, natural and practical styles. . Therefore, hemp fabric has gradually become an ideal fabric in the hands of senior fashion designers. Therefore, the optimization of hemp fiber degumming process has attracted more and more attention. Due to the unique physical and chemical properties of hemp fiber, it is more difficult to degumming than ramie, flax and other hemp, which inhibits the further improvement of product quality. Among all the degumming...

Claims

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Application Information

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IPC IPC(8): D01C1/00
Inventor 赵欣赵彦松常江罗晶琨
Owner QIQIHAR UNIVERSITY
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