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Method for scouring cotton fabric by applying cutinase and CBD (cellulose-binding domain)-alkaline pectinase

A technology of pectinase and cutinase, which is applied in the fields of plant fiber, textile, papermaking, biochemical fiber treatment, etc., to achieve the effect of good dyeing quality, small fiber damage and low chroma

Inactive Publication Date: 2011-08-10
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary lipases can only hydrolyze triglycerides

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Fabric type: combed 14.5 extra cotton yarn, treated by batch method (dipping method) in one bath.

[0030] Process flow: Cotton yarn → 95-98°C hot water treatment for 2 minutes → soaking in a mixed enzyme solution composed of cutinase and CBD-alkaline pectinase → hot water washing → cold water washing → drying.

[0031] Cutinase and CBD-alkaline pectinase mixed enzyme solution treatment: cutinase 2.5% (for fabric weight, the same below), CBD-alkaline pectinase 3.5%, anion nonionic composite surfactant 2.0g / L, The pH value is 7.5, and the liquor ratio is 1:20. Treat at 70°C for 60min.

[0032] Hot water washing: 95-98 ℃ hot water washing for 2 minutes.

[0033] Wash in cold water: wash in cold water for 5 minutes.

[0034] Drying: Dry at 90-105°C.

[0035] After the above process, the pectin removal rate on the cotton yarn is 95%, the strength is reduced by 1.3%, the weight loss rate is 1.3%, and the capillary effect is 7.3cm / 30min. The dyeing uniformity and fastnes...

Embodiment 2

[0037] Fabric type: 18tex pure cotton single jersey (knitted fabric), treated by batch method (dipping method) in two baths.

[0038] Process flow: Cotton knitted fabrics are treated with hot water at 95-98°C for 2 minutes → cutinase treatment → CBD-alkaline pectinase treatment → hot water washing → cold water washing.

[0039] ① cutinase treatment: cutinase 2.5% (weight to fabric, the same below), nonionic surfactant wetting agent 2.5g / L, pH value 7.0, bath ratio 1: 20. Treat at 65°C for 70min.

[0040] ②CBD-alkaline pectinase treatment: CBD-alkaline pectinase 2.0%, anionic surfactant wetting agent 2.0g / L, pH value 7.5, liquor ratio 1:20. Process 60 at 65 °C.

[0041] ③Washing in hot water: washing in hot water at 95-98°C for 2 minutes.

[0042] ④ Washing in cold water: wash in cold water for 5 minutes.

[0043] ⑤ Drying: Drying at 90-105°C.

[0044] After the above process, the removal rate of pectin on the pure cotton knitted fabric is 92%, the strength is reduced by 1...

Embodiment 3

[0046] Fabric type: 14.5tex×14.5tex 133×72 cotton poplin, treated by continuous (padding) two-bath method.

[0047] Process flow: desized cotton poplin padding cutinase solution → steaming (65°C, 50min) → hot water washing → cold water washing → padding CBD-alkaline pectinase solution → steaming (75°C, 50min) →Wash in hot water→Wash in cold water.

[0048] ① Padding cutinase solution: cutinase 4.5g / L, anionic surfactant wetting agent 2.5g / L, pH value 7.5, and the rate of padding is 80%-150%.

[0049] ②Padding CBD-alkaline pectinase solution: CBD-alkaline pectinase 3.0g / L, non-ionic surfactant wetting agent 2.0g / L, pH value 7.0, squeeze rate 80%-150%.

[0050] ③Washing in hot water: 2 compartments in hot water at 95-98°C.

[0051] ④ Washing in cold water: wash 2 compartments in cold water.

[0052] ⑤ Drying: Drying at 90-105°C.

[0053] After the above process, the removal rate of pectin on cotton poplin is 93%, the strength is reduced by 1.5%, the weight loss rate is 1.9%,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a method for scouring a cotton fabric by applying cutinase and CBD (cellulose-binding domain)-alkaline pectinase, belonging to the technical field of treatment of cotton fabrics before dyeing and finishing. The method comprises the following steps of: treating a cotton knitted fabric, cotton yarns, or a cotton woven fabric from which size is removed by amylase or sodium hydroxide firstly, in a mixed enzyme solution formed by cutinase and CBD-alkaline pectinase; or respectively treating in the cutinase solution and the CBD-pectinase solution, wherein the hydrophobic surface structure of cotton fibers is destructed by the cutinase, the higher fatty acid ester substances are removed from the surface waxy layers of the cotton fibers, so that the wettability of the cotton fabric is improved, the pectic substances on the cotton fibers are exposed, and then the CBD-pectinase is absorbed on the surface cellulose of the cotton fibers to decompose the pectic substances on the cotton fibers. By the method provided by the invention, on the one hand, the traditional chemical treatment method can be substituted for scouring the cotton fabric, and on the other hand, because the cutinase and the CBD-alkaline pectinase are adopted, the wettability of the cotton fibers and the pectin removal rate are improved.

Description

technical field [0001] The invention discloses a method for scouring cotton fabrics by applying cutinase and CBD-alkaline pectinase, which belongs to the technical field of cotton fabric dyeing and finishing pretreatment. Background technique [0002] Cotton fiber has excellent wearability and is an important class of natural textile fibers. Its products include cotton knitted fabrics and cotton woven fabrics. However, in the growth process of cotton fiber, there are a certain amount of substances that play a protective role, as well as substances generated in the process of biological metabolism and cellulose symbiosis, these cellulose symbiosis mainly include pectin substances, nitrogenous substances, waxes, etc. Like substances, natural pigments, etc., as well as cotton seed husks entrained when cotton fibers are stripped. These impurities are called natural impurities on cotton fabrics. These symbionts on cotton fibers will affect the cotton fabric’s wearability, appea...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D06M16/00C12S11/00D06M101/06
Inventor 王强范雪荣章金芳徐华君余圆圆王平
Owner JIANGNAN UNIV
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