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Cotton desizing method based on supercritical carbon dioxide and alkaline biological enzymes

A carbon dioxide and supercritical technology, applied in textiles, papermaking, dry-cleaning fiber products, etc., can solve the problems of difficult control of protease mixing and activity, and difficulty in osmotic swelling of cotton fabrics, and achieve improved activity, good alkali resistance, and good degradation performance Effect

Inactive Publication Date: 2017-08-01
苏州凯邦生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above prior art that the desizing technology of cotton fibers has combined supercritical carbon dioxide fluid technology with other biochemical desizing agents to desizing cotton fibers, but the mixing and activity of protease in supercritical carbon dioxide fluid It is difficult to control, and the osmotic expansion of cotton fabrics in the hydrophobic high-pressure supercritical carbon dioxide fluid medium is also difficult, so the desizing process of cotton fabrics based on supercritical carbon dioxide fluid technology still has research value

Method used

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  • Cotton desizing method based on supercritical carbon dioxide and alkaline biological enzymes

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Dissolve lignin and sodium bicarbonate weakly alkaline substances in water, add ethanol according to the volume ratio of ethanol and water as 1:4, and then add di-octyl succinate with a mass ratio of 1:1 sodium nitrate and chitosan surfactant, stirred at room temperature to form a base solution, the content of the surfactant in the base solution is 2g / L, and the pH is 9.

[0026] (2) According to the bath ratio of 1:30, add alkaline protease, α-amylase and PVA degrading enzyme with a mass ratio of 1:0.5:0.5 to the base solution, and mix evenly to form a desizing agent.

[0027] (3) Immerse the cotton fabric containing starch size in the desizing agent, put it into a constant temperature ultrasonic generator, heat and ultrasonically pretreat it for 10 minutes at a temperature of 50°C and a power of 100W, take it out, and put the desizing agent and the pretreated The treated cotton fabrics are all transferred to a supercritical carbon dioxide fluid device, and desizin...

Embodiment 2

[0029] (1) Dissolve lignin and sodium bicarbonate weakly alkaline substances in water, add ethanol according to the volume ratio of ethanol and water as 1:5, and then add di-octyl succinate with a mass ratio of 1:1 Sodium nitrate and chitosan surfactant were stirred evenly at room temperature to form a base solution. The content of surfactant in the base solution was 3g / L, and the pH was 10.

[0030] (2) According to the bath ratio of 1:30, add alkaline protease, α-amylase and PVA degrading enzyme with a mass ratio of 1:0.8:0.8 to the base solution, and mix evenly to form a desizing agent.

[0031] (3) Immerse the cotton fabric containing PVA size in the desizing agent, put it into a constant temperature ultrasonic generator, heat and ultrasonically pretreat it for 15 minutes at a temperature of 60°C and a power of 150W, take it out, and put the desizing agent and the pretreated The treated cotton fabrics are all transferred to a supercritical carbon dioxide fluid device, and ...

Embodiment 3

[0033] (1) Dissolve lignin and sodium bicarbonate weakly alkaline substances in water, add ethanol according to the volume ratio of ethanol to water as 1:4.5, and then add di-octyl succinate with a mass ratio of 1:1 Sodium nitrate and chitosan surfactant were stirred evenly at room temperature to form a base solution, the content of surfactant in the base solution was 2.5g / L, and the pH was 9.2.

[0034] (2) According to the bath ratio of 1:30, add alkaline protease, α-amylase and PVA degrading enzyme with a mass ratio of 1:0.6:0.7 to the base solution, and mix evenly to form a desizing agent.

[0035] (3) Immerse the cotton fabric containing acrylic size in the desizing agent, put it into a constant temperature ultrasonic generator, heat and ultrasonically pretreat it for 13 minutes at a temperature of 55°C and a power of 120W, take it out, and put the desizing agent and the pretreated The treated cotton fabrics are all transferred to a supercritical carbon dioxide fluid devi...

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Abstract

The invention provides a preparation method of a cotton desizing method based on supercritical carbon dioxide and alkaline biological enzymes. The cotton desizing method comprises the following steps: dissolving lignin and sodium bicarbonate weakly-alkaline materials in water, adding alcohol, then adding docusate sodium and chitosan surfactants, and uniformly stirring under room temperature to form a substrate solution; adding alkaline proteases, alpha-amylases and PVA degeneration enzymes into the substrate solution, and uniformly mixing to form a desizing agent; dipping a cotton fabric in the desizing agent, putting the desizing agent and the cotton fabric in a constant-temperature ultrasonic generator, heating and carrying out ultrasonic pretreatment, taking the desizing agent and the cotton fabric out, transferring the desizing agent and the pretreated cotton fabric to a supercritical carbon dioxide fluid device, carrying out desizing treatment, separating and recycling the desizing agent and the supercritical carbon dioxide fluid, taking the fabric out, washing and drying to obtain the desized cotton fabric. The cotton desizing method is capable of efficiently removing various size agents on the surface of the cotton fabric with combination of a biological enzyme technique, an ultrasonic technique and a supercritical carbon dioxide technique, and is green and safe.

Description

technical field [0001] The invention belongs to the technical field of textile materials, and in particular relates to a cotton desizing method based on supercritical carbon dioxide and alkaline biological enzymes. Background technique [0002] Cotton fabric has good moisture absorption and air permeability, comfortable to wear, and low price. It is one of the most commonly used clothing materials, and desizing is an indispensable step in the textile pretreatment process. Desizing is to improve weaving efficiency and sizing The size is removed to prepare for the subsequent processing and printing and dyeing of textiles. The desizing process of cotton fabrics has also attracted much attention. [0003] At present, the sizing of textiles mainly includes starch sizing, PVA sizing and propylene sizing. The traditional desizing processes mainly include alkali desizing, oxidant desizing and enzyme desizing. In addition, there are plasma desizing, ultrasonic assisted Desizing etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L1/14
CPCD06L1/14
Inventor 冯海燕
Owner 苏州凯邦生物技术有限公司
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