Lignin/sodium alginate cross-linked modified paste for vat dye printing of cotton/chinlon blended fabric as well as preparation method and application of lignin/sodium alginate cross-linked modified paste

A technology of sodium alginate and blended fabrics, which is applied in textiles, papermaking, dyeing, etc., can solve the problems of poor hydrophilicity and high price, and achieve the effects of increasing paste rate, high price and good application prospects

Pending Publication Date: 2022-07-29
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrophilicity of polyamide fiber is poor, while the hydrophilicity of cotton fiber is strong, which requires printing paste to have more hydrophilic groups and more hydrophobic groups; Good hydrophilicity and hydrophobicity
Composite pastes are currently used in the market to achieve better printing effects, but composite pastes need to be matched many times, and the price is high

Method used

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  • Lignin/sodium alginate cross-linked modified paste for vat dye printing of cotton/chinlon blended fabric as well as preparation method and application of lignin/sodium alginate cross-linked modified paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of lignin / sodium alginate cross-linked modified paste printed with vat dye of cotton / polyamide blended fabric, the specific method comprises the following steps:

[0025] (1) In 150mL distilled water, add 1g epichlorohydrin, 15g sodium lignosulfonate and 4g sodium alginate, adjust the pH value to 10.5 with 25wt% NaOH aqueous solution, the reaction temperature is: 55°C, and the reaction time is: 4 After the reaction is over, centrifuge; slowly add the supernatant to 4 times the volume of 97% ethanol, let it stand for 2.5 hours, filter with suction to obtain a filter cake, wash with absolute ethanol, and vacuum dry at 65°C for 7 hours to prepare Lignin cross-linked with sodium alginate.

[0026] (2) In 150 mL of distilled water, add 1 g of the cross-linked product of lignin and sodium alginate prepared in step (1), 1.5 g of 1,6-hexamethylene diisocyanate, 4 g of polyethylene glycol with a molecular weight of 1000 and 0.2 g of dibutyltin diisocyanate...

Embodiment 2

[0029] The preparation method of lignin / sodium alginate cross-linked modified paste printed with vat dye of cotton / polyamide blended fabric, the specific method comprises the following steps:

[0030] (1) in 100mL distilled water, add 1g epichlorohydrin, 10g sodium lignosulfonate and 3g sodium alginate, adjust the pH value to 10 with 20wt% NaOH aqueous solution, the reaction temperature is: 50 ℃, and the reaction time is: 3 After the reaction is completed, centrifuge; slowly add the supernatant to 3 times the volume of 95% ethanol, let stand for 2 hours, and filter with suction to obtain a filter cake, which is then washed with absolute ethanol and dried in vacuum at 60°C for 6 hours to obtain wood The cross-linking compound of alginate and sodium alginate.

[0031] (2) In 100 mL of distilled water, add 1 g of the cross-linked product of lignin and sodium alginate prepared in step (1), 1 g of 1,6-hexamethylene diisocyanate, 3 g of polyethylene glycol with a molecular weight of...

Embodiment 3

[0034] The preparation method of lignin / sodium alginate cross-linked modified paste printed with vat dye of cotton / polyamide blended fabric, the specific method comprises the following steps:

[0035](1) in 200mL distilled water, add 1g epichlorohydrin, 20g sodium lignosulfonate and 5g sodium alginate, adjust pH value to 11 with 30wt% NaOH aqueous solution, reaction temperature is: 60 ℃, reaction time is: 5 After the reaction is over, centrifuge; slowly add the supernatant to 5 times the volume of 99% ethanol, let it stand for 3 hours, filter with suction to obtain a filter cake, wash with absolute ethanol, and vacuum dry at 70°C for 8 hours to obtain wood The cross-linking compound of alginate and sodium alginate.

[0036] (2) In 200 mL of distilled water, add 1 g of the cross-linked product of lignin and sodium alginate obtained in step (1), 2 g of 1,6-hexamethylene diisocyanate, 5 g of polyethylene glycol with a molecular weight of 1000 and 0.3 g of dibutyltin dilaurel aci...

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Abstract

The invention relates to lignin / sodium alginate cross-linked modified paste for vat dye printing of cotton / chinlon blended fabric as well as a preparation method and application of the lignin / sodium alginate cross-linked modified paste. The paste is prepared by the following preparation method: reacting lignin with sodium alginate through epoxy chloropropane to crosslink the lignin and the sodium alginate, and then grafting a cross-linked product with a polyethylene glycol long-chain branch chain to obtain the paste. The lignin / sodium alginate cross-linked modified paste prepared by the invention is used for vat dye printing of cotton / chinlon blended fabric, and the prepared printed fabric shows that the paste removal rate is higher than 92%; the softness is good; the contour definition is high; the permeability is higher than 85%; the color fastness to dry rubbing and the color fastness to soaping are high, and the application prospect is very good.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of paste, and in particular relates to a lignin / sodium alginate cross-linked modified paste for vat dye printing of cotton / polyamide blended fabrics and a preparation method and application thereof. Background technique [0002] The printing paste is an important part of the printing paste, and it is the medium for the dissolution and dispersion of dyes and auxiliaries. The properties and smoothness can meet the original requirements without causing defects such as depth and penetration. Although the original paste is washed away from the fabric after the dye is fixed, the nature of the original paste greatly determines the running performance of the printing, the clarity of the pattern outline and the hand feeling. [0003] Nylon, also known as polyamide fiber, is mainly printed with vat dyes and acid dyes; the main component of cotton is cellulose, which is mainly printed by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P3/82D06P1/22D06P1/46D06P1/48D06P1/52
CPCD06P3/8219D06P1/22D06P1/46D06P1/48D06P1/5285
Inventor 杨永生冯宇琴马文霞李海波杨铭余韵滋张钢武亚琪周凡雨彭雄义
Owner WUHAN TEXTILE UNIV
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