Ligninase-assisted process for degumming China hemp fiber by freezing and suddenly heating

A technology of ligninase and hemp fiber, which is applied in the direction of chemical production of bast fiber and bacterial retting, can solve the problems of high residual glue rate, low whiteness and softness, large amount of chemical reagents, etc. Less effect, good whiteness and softness, low chemical dosage

Active Publication Date: 2014-12-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a hemp fiber freezing and sudden heating lignin enzyme-assisted degumming process to solve the problems of high residual glue rate, unsatisfactory lignin removal effect, whiteness and Low flexibility, large amount of chemical reagents, serious environmental pollution and other problems

Method used

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  • Ligninase-assisted process for degumming China hemp fiber by freezing and suddenly heating
  • Ligninase-assisted process for degumming China hemp fiber by freezing and suddenly heating
  • Ligninase-assisted process for degumming China hemp fiber by freezing and suddenly heating

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Effect test

Embodiment approach 1

[0051] The specific steps for implementing the hemp fiber freezing and sudden heating ligninase-assisted degumming process described in the present invention are as follows.

[0052] 1. Ultrasonic-boiling treatment

[0053] Under the condition of ultrasonic power of 350W and 70°C, use deionized water, the concentration of the fiber in the solution is 25g / L, completely soak the fiber for 100min, and alternately stir clockwise / counterclockwise every 10min to make it soak evenly. Wash several times with water until the pH value of the soaking solution is 7.

[0054] 2. Pre-soaking treatment

[0055] At 50°C, use dilute sulfuric acid with a concentration of 2.5g / L to completely soak Henan Gushi hemp raw hemp (the concentration of fiber in the solution is 25g / L) for 90 minutes, and alternately stir clockwise / counterclockwise every 10 minutes to make it soak evenly . Wash several times with water until the pH value of the soaking solution is 7.

[0056] 3. UV-radiation treatment...

Embodiment approach 2

[0068] The specific steps of a hemp fiber freezing and sudden heating ligninase-assisted degumming process are as follows.

[0069] 1. Ultrasonic-boiling treatment

[0070] Under the condition of ultrasonic power of 350W and 80°C, completely soak the fiber with deionized water (the concentration of the fiber in the solution is 25g / L) for 100min, and alternately stir clockwise / counterclockwise every 10min to make it soak evenly. Wash several times with water until the pH value of the soaking solution is 7.

[0071] 2. Pre-soaking treatment

[0072] At 50°C, use dilute sulfuric acid with a concentration of 1.5g / L to completely soak Henan Gushi hemp raw hemp (the concentration of fiber in the solution is 25g / L) for 100 minutes, and alternately stir clockwise / counterclockwise every 10 minutes to make it soak evenly . Wash several times with water until the pH value of the soaking solution is 7.

[0073] 3. UV-radiation treatment

[0074] Wash the pre-soaked fiber to PH = 7, p...

Embodiment approach 3

[0085] The specific steps of a hemp fiber freezing and sudden heating ligninase-assisted degumming process are as follows.

[0086] 1. Ultrasonic-boiling treatment

[0087] Under the condition of ultrasonic power of 350W and 70°C, completely soak the fiber with deionized water (the concentration of the fiber in the solution is 25g / L) for 80min, and alternately stir clockwise / counterclockwise every 10min to make it soak evenly. Wash several times with water until the pH value of the soaking solution is 7.

[0088] 2. Pre-soaking treatment

[0089] At 60°C, use dilute sulfuric acid with a concentration of 1.5g / L to completely soak Henan Gushi hemp raw hemp (the concentration of fiber in the solution is 25g / L) for 100 minutes, and alternately stir clockwise / counterclockwise every 10 minutes to make it soak evenly . Wash several times with water until the pH value of the soaking solution is 7.

[0090] 3. UV-radiation treatment

[0091] Wash the pre-soaked fiber to PH = 7, pu...

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Abstract

The invention discloses a ligninase-assisted process for degumming China hemp fiber by freezing and suddenly heating. The ligninase-assisted process for degumming China hemp fiber by freezing and suddenly heating comprises the following steps: ultrasonically poaching and pre-pickling; then carrying out UV radiation, freezing and suddenly heating, and processing by the ligninase; and finally degumming at high temperature and high pressure. The gumming effect of the surface of the China hemp fiber processed by the process is superior than that of a chemical method and a mechanical method; the China hemp fiber processed by the process is relatively low in residual gun rate and content of ligninase, so that the requirements of a textile finishing process can be met; good whiteness and softness are obtained; meanwhile, the breakage strength of the fiber is controlled in the spinning requirements; the length and the fineness of the fiber are also improved; the comfortable property is greatly improved; the use amount of chemical treatment reagents can be reduced; the polluted wastewater discharge is relatively low; the ligninase-assisted process for degumming China hemp fiber by freezing and suddenly heating is a green and environment-friendly process.

Description

technical field [0001] The invention relates to a degumming treatment process for hemp (hemp) raw hemp fiber, especially a kind of hemp fiber freezing and sudden heating on the basis of high temperature and high pressure degumming method, supplemented by freezing sudden heating and lignin enzyme treatment Lignin enzyme assisted degumming process. Background technique [0002] There are many degumming methods for existing hemp (hemp) fibers, such as: traditional pool retting method, chemical degumming method, microbial degumming method, enzymatic degumming method, flash explosion method, alkali oxygen method, ultrasonic degumming method and mechanical degumming method. -Chemical degumming method, etc. [0003] In the invention patent with the publication number CN1851062 and the name "a hemp degumming process", the method of combining normal temperature and pressure with high temperature and high pressure is used to degumming the hemp fiber, which saves more than 1.5 hours o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01C1/02D01C1/04
Inventor 魏丽乔高向华李闲闲袁保卫许并社马森源
Owner TAIYUAN UNIV OF TECH
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