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Method for preparing chitin size modified by biological enzyme method

A biological enzymatic method and chitin technology, applied in the field of textile chemistry, can solve problems such as environmental pollution, chitin macromolecular chains reduce molecular weight, etc., achieve good water solubility, uniform deacetylation degree, and save production costs

Inactive Publication Date: 2010-06-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects, the present invention provides a preparation method of bioenzymatically modified chitin slurry to solve the problems of chitin macromolecular chain breakage reducing its molecular weight and causing environmental pollution.

Method used

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  • Method for preparing chitin size modified by biological enzyme method
  • Method for preparing chitin size modified by biological enzyme method
  • Method for preparing chitin size modified by biological enzyme method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Step 1: Preparation of Chitin Deacetylase Seed Culture Solution

[0047] ① According to the formula of chitin deacetylase seed culture solution, weigh the percentage by weight of each component: 30% sucrose, 2% sodium nitrate, 1% potassium hydrogen phosphate, 0.01% ferrous sulfate, 0.5% anhydrous magnesium sulfate, 0.5% potassium chloride , the remaining amount of water, put it into the beaker, and heat it to dissolve at a temperature of 50°C;

[0048] ②Use 0.1mol / L NaOH solution to adjust the pH value of the solution obtained in ① above to 7.0, then put it in a 250mL Erlenmeyer flask and wrap the mouth of the bottle with eight layers of degreasing gauze and eight layers of paper;

[0049] ③Put the above-mentioned conical flask in a vertical pressure steam sterilizer, and sterilize it by moist heat for 20 minutes at a temperature of 121°C and a pressure of 0.1MPa. After sterilization, place it on a sterile workbench. Irradiate with UV light for 20min;

[0050] ④ Open ...

Embodiment 2

[0062] Step 1: Preparation of Chitin Deacetylase Seed Culture Solution

[0063] ① According to the formula of chitin deacetylase seed culture solution, weigh the percentage by weight of each component: sucrose 20, sodium nitrate 3.5, dipotassium hydrogen phosphate 1, ferrous sulfate 0.01, anhydrous magnesium sulfate 0.5, potassium chloride 0.5 , the remaining amount of water, put it into the beaker, and heat it to dissolve at a temperature of 50°C;

[0064] ②Use 0.1mol / L NaOH solution to adjust the pH value of the solution obtained in ① above to 7.1, then put it in a 250mL Erlenmeyer flask and wrap the mouth of the bottle with eight layers of degreasing gauze and eight layers of paper;

[0065] ③Put the above-mentioned conical flask in a vertical pressure steam sterilizer, and sterilize it by moist heat for 20 minutes at a temperature of 121°C and a pressure of 0.1MPa. After sterilization, place it on a sterile workbench. Irradiate with UV light for 20min;

[0066] ④ Open th...

Embodiment 3

[0077] Step 1: Preparation of Chitin Deacetylase Seed Culture Solution

[0078] ① According to the formula of chitin deacetylase seed culture solution, weigh the percentage by weight of each component: sucrose 40, sodium nitrate 5, dipotassium hydrogen phosphate 1, ferrous sulfate 0.01, anhydrous magnesium sulfate 0.5, potassium chloride 0.5 , the remaining amount of water, put it into the beaker, and heat it to dissolve at a temperature of 50°C;

[0079] ②Use 0.1mol / L NaOH solution to adjust the pH value of the solution obtained in ① above to 7.2, then put it in a 250mL Erlenmeyer flask and wrap the mouth of the bottle with eight layers of degreasing gauze and eight layers of paper successively;

[0080] ③Put the above-mentioned conical flask in a vertical pressure steam sterilizer, and sterilize it by moist heat for 20 minutes at a temperature of 121°C and a pressure of 0.1MPa. After sterilization, place it on a sterile workbench. Irradiate with UV light for 20min;

[0081...

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Abstract

The invention belongs to the field of textile chemistry, and relates to a method for preparing chitin size modified by a biological enzyme method. The method is characterized in that the chitin size modified by the biological enzyme method is finally prepared through steps of: step 1, the preparation of a chitin deacetylase seed culture fluid; step 2, the preparation of chitin deacetylase; and step 3, the preparation of the chitin size modified by the biological enzyme method. The chitin size has better water solubility, and steady viscosity; and the size can endow fabrics with certain antibacterial property and sterilization property, so no desizing is needed after the weaving is finished, the discharge of a desizing waste liquid is avoided, the production cost is saved, the environmental pollution is reduced, and the requirement on green environmental protection is achieved.

Description

technical field [0001] The invention belongs to the field of textile chemistry, and relates to a preparation method of bioenzymatically modified chitin size, so that the environment-friendly chitin size can be better used for warp yarn sizing in textile mills. Background technique [0002] The macromolecular structural formula of chitin before modification is as follows: [0003] [0004] The existing chitin sizing has a weakness, that is, poor water solubility, which cannot meet the normal sizing requirements. At present, the method to solve the water solubility of chitin is generally a chemical method: after deacetylating chitin with concentrated alkali, then dissolving the deacetylated product with acid solution, and then obtaining chitin slurry. The deacetylation of this chemical method uses a large amount of strong acid and strong alkali, which will easily cause the breakage of the macromolecular chain of chitin and reduce its molecular weight. After deacetylation, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/03C12P19/04C12R1/66
Inventor 郭建生申芳李朝丽田心杰陈秀苗
Owner DONGHUA UNIV
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