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Method for improving softness of bamboo pulp fiber through laccase-assisted cellulase treatment

A technology of cellulase and bamboo pulp fiber, which is applied in the field of pulp and paper making, can solve the problems of low reaction efficiency, few adsorption sites of cellulase, and high lignin content, so as to improve softness, reduce environmental pollution, and increase exposure area effect

Inactive Publication Date: 2021-02-02
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lignin content in bamboo pulp fiber is high, the adsorption sites of cellulase are few, and the reaction efficiency is low.

Method used

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  • Method for improving softness of bamboo pulp fiber through laccase-assisted cellulase treatment
  • Method for improving softness of bamboo pulp fiber through laccase-assisted cellulase treatment
  • Method for improving softness of bamboo pulp fiber through laccase-assisted cellulase treatment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of method utilizing laccase treatment to improve the softness of bamboo pulp fiber, comprises the steps:

[0019] Step 1: decompress the high-yield bamboo pulp until the fibers are completely dispersed; obtain fiber pulp;

[0020] Step 2: Take five fiber slurries with equal absolute dry mass, adjust the pH value to 6.5 and add water to adjust the mass concentration of the fiber slurries to 2%, put these five slurries into laccase and mediator lacquer respectively The enzyme dosage is 10U / g, 20U / g, 30U / g, 50U / g, 60U / g respectively, the mediator dosage is 1.5%, and a water bath is used to maintain the temperature when the laccase acts.

[0021] Step 3: Squeeze out the moisture from the material obtained in step 2, and measure the softness of a single fiber by measuring the bending degree of the fiber with the glass-wire method to quantitatively analyze the softness of the fiber. See Tables 1 and 2.

[0022] Table 1 Effect of laccase treatment time on the softness...

Embodiment 2

[0027] The method for improving the softness of bamboo pulp fibers in combination with laccase action and cellulase treatment comprises the steps:

[0028] Step 1: decompress the high-yield bamboo pulp until the fibers are completely dispersed to obtain fiber pulp;

[0029] Step 2: Take six equal-quality fiber slurries, adjust the pH value to 6.5 and add water to adjust the mass concentration of the fiber slurries to 2%, and put these five parts of slurries into laccase and mediator respectively. 0U / g, 10U / g, 20U / g, 30U / g, 40U / g, 50U / g, the amount of mediator is 1.5%, and a water bath is used to maintain the temperature when the laccase acts.

[0030] Step 3: Adjust the pH value of the material obtained in Step 2 to 6.5 and adjust the mass concentration of the fiber slurry to 1%. After heating up to 50°C, add cellulase so that the dosage of cellulase is 0EGU / g and 0.2EGU respectively / g, 0.6EGU / g, 0.9EGU / g, 2EGU / g, 3EGU / g, act for 50min.

[0031] Step 4: Squeeze out the wate...

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Abstract

The invention discloses a method for improving the softness of bamboo pulp fiber through laccase-assisted cellulase treatment, and belongs to the field of pulping and papermaking. The method is characterized by mainly comprising the following steps of: 1) defibering a fiber raw material until the fiber raw material is completely dispersed; 2) adjusting the pH value to 3-6, and adjusting the concentration of the slurry to 0.05%-6%; (3) heating the slurry obtained in the step (2) to 30DEG C-60DEG C, introducing oxygen, adding 5U / g-70U / g of laccase and 1%-2% of a mediator, and carrying out reaction for 1h-15h; 4) cleaning the slurry; 5) adjusting the pH value of the obtained slurry to 3-7, adjusting the slurry concentration to 0.5%-2%, performing heating to 30DEG C-60DEG C, adding cellulase with an enzyme dosage of 0.1EGU / g-3EGU / g, and carrying out reaction for 30min-60min; and 6) measuring the softness of the obtained fiber. According to the invention, laccase cellulase is adopted to treat fiber, lignin is degraded by laccase, the fibrillation degree of the fiber is increased, more adsorption sites are provided for cellulase, the treatment efficiency is improved, and meanwhile, the softness of a single fiber is improved.

Description

technical field [0001] The invention belongs to the field of pulping and papermaking, and in particular relates to a method for improving the softness of bamboo pulp fibers through laccase-assisted cellulase treatment. Background technique [0002] Bamboo pulp is a papermaking raw material with a long history. In recent years, due to its own advantages, bamboo pulp has also gained more room for development. Compared with wood pulp, bamboo pulp has many advantages. As far as raw materials are concerned, bamboo is rich in resources, wide in source, fast in growth rate and short in cycle. Therefore, bamboo pulp fiber has a great advantage in price and saves significantly raw material cost. Applied in the papermaking industry, bamboo pulp fiber has good water absorption performance, slender fiber and excellent paper-making performance, and the internal composition of bamboo pulp fiber has a high cellulose content. However, there are also some problems that cannot be ignored i...

Claims

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Application Information

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IPC IPC(8): D21C5/00
CPCD21C5/005
Inventor 刘洪斌张润青安兴业刘利琴杨健张伟李晨曦杨伟松
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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