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Hydrogen peroxide desizing pretreatment method for cotton in a supercritical carbon dioxide fluid

A carbon dioxide and fluid treatment technology, which is applied in the treatment of textile materials, liquid/gas/steam textile materials, textiles and papermaking, etc., to achieve the effects of improving whiteness, convenient operation and optimizing desizing process

Active Publication Date: 2017-10-13
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, no one has been involved in the hydrogen peroxide desizing pretreatment method for cotton in supercritical carbon dioxide fluid. Due to the particularity of supercritical carbon dioxide fluid itself, its hydrogen peroxide desizing technology is different from that in traditional water baths.

Method used

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  • Hydrogen peroxide desizing pretreatment method for cotton in a supercritical carbon dioxide fluid
  • Hydrogen peroxide desizing pretreatment method for cotton in a supercritical carbon dioxide fluid
  • Hydrogen peroxide desizing pretreatment method for cotton in a supercritical carbon dioxide fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The invention provides a hydrogen peroxide desizing pretreatment method for cotton in a supercritical carbon dioxide fluid, the hydrogen peroxide desizing pretreatment method adopts such as figure 1 The desizing reactor in the supercritical carbon dioxide fluid with the structure shown is realized. The desizing reactor includes a desizing liquid storage tank 1 and a desizing tank 2 sealedly connected with the desizing liquid storage tank 1 through a connecting device. The desizing liquid storage kettle 1 is a cylindrical kettle body, and an inverted "mountain"-shaped tubular fluid distributor 3 is installed inside. It is mainly composed of three interconnected pipes. The pipe in the center is a circulating fluid inlet pipe, and the circulating fluid The bottom end of the inlet pipe is connected with a supercritical carbon dioxide fluid treatment system (not shown in the figure) with a circulating pump; the two pipes on both sides are the circulating fluid outlet pipes, ...

Embodiment 2

[0058] The present invention provides a hydrogen peroxide desizing pretreatment method for cotton in a supercritical carbon dioxide fluid. The hydrogen peroxide desizing pretreatment method is the same as the hydrogen peroxide desizing pretreatment method described in Example 1. The difference lies in: this implementation For example, the temperature of the supercritical carbon dioxide fluid is 75°C.

[0059] The test results of the weight loss rate and gross effect value of the cotton products subjected to desizing pretreatment in this embodiment are as follows: the weight loss rate is 4.7%, and the gross effect value is 14.4 cm.

Embodiment 3

[0061] The present invention provides a hydrogen peroxide desizing pretreatment method for cotton in a supercritical carbon dioxide fluid. The hydrogen peroxide desizing pretreatment method is the same as the hydrogen peroxide desizing pretreatment method described in Example 1. The difference lies in: this implementation Example supercritical carbon dioxide fluid temperature is 60 ℃.

[0062] The test results of the weight loss rate and gross effect value of the cotton products subjected to desizing pretreatment in this embodiment are: the weight loss rate is 2.7%, and the gross effect value is 11.3 cm.

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Abstract

The invention provides a hydrogen peroxide desizing pretreatment method for cotton in a supercritical carbon dioxide fluid. The method comprises the steps that 1, a surfactant is dissolved in a mixture of alcohols and water, wherein the volume ratio of the alcohols to the water ranges from 1:2 to 1:5; 2, hydrogen peroxide (unit mass (g) of a green cotton product corresponds to 6-12 ml) is added into the mixture of the alcohols and the water, and the materials are stirred to be clear; 3, the solution obtained in the second step is put into a desizing reactor, a hydrogen peroxide desizing device is formed, the green cotton product is put into the hydrogen peroxide desizing device, and then the hydrogen peroxide desizing device is put into a supercritical carbon dioxide fluid treatment system with a circulating device; 4, the treatment system is sealed, the circulating device is started, and oxidizing desizing pretreatment is conducted on the cotton product on the condition that the temperature ranges from 60 DEG C to 90 DEG C, the pressure ranges from 14 Mpa to 20 Mpa, the treating time ranges from 50 min to 110 min, and the ratio of the fluid circulating time to the stationary treating time is 1 to 10. The method is simple in technology, mild in reaction and small in damage to the cotton product, avoids a large amount of water, heat and high-concentration alkali in a traditional technology and has the advantages of being efficient, green, environmentally friendly and capable of saving energy.

Description

technical field [0001] The invention belongs to the technical field of textile dyeing and finishing, and in particular relates to a hydrogen peroxide pretreatment method for desizing cotton in a supercritical carbon dioxide fluid. Background technique [0002] Desizing is an indispensable step in the fabric pretreatment process. It can remove the sizing agent to improve the weaving efficiency, so as to prepare the fabric for subsequent processing and printing and dyeing. Traditional desizing methods are carried out in water, such as alkali desizing, oxidant desizing and acid desizing. Alkali desizing is to use the commonly used slurry to swell after being boiled in hot alkali solution for a long time, change from gel to sol state, bond with fiber and become loose, and then remove the swollen slurry by washing. However, it usually consumes a lot of water and heat energy, and the chemical oxygen demand (COD) value of the treated wastewater is also high, which seriously pollu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06B3/10D06L1/14
CPCD06B3/10D06L1/14
Inventor 龙家杰孙隆隆曹燕
Owner SUZHOU UNIV