A method for preparing degummed mulberry silk products based on biological enzyme method

A mulberry silk and degumming technology, which is applied in the biochemical treatment of enzymes/microbes, animal fibers, textiles and papermaking, etc., can solve the problems of poor wettability and low whiteness of mulberry silk, and achieve good degumming effect, wettability and High whiteness, good degumming effect

Active Publication Date: 2022-03-25
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, the mulberry silk degummed by protease has the problems of poor wettability and low whiteness

Method used

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  • A method for preparing degummed mulberry silk products based on biological enzyme method
  • A method for preparing degummed mulberry silk products based on biological enzyme method

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Embodiment 1

[0047] A method for preparing degummed mulberry silk products based on a biological enzyme method, comprising the steps of:

[0048] (1) Protease and cutinase degumming:

[0049]Immerse mulberry silk power-spun raw silk in a solution of alkaline protease and cutinase, and degumming at a temperature of 40°C and pH 8 for 0.5h to obtain a degumming system; wherein the alkaline protease in the solution of alkaline protease and cutinase The dosage is 2U / mL, and the dosage of cutinase is 5U / mL;

[0050] (2) Lipase catalyzed low temperature bleaching:

[0051] Add lipase, glyceryl triacetate and hydrogen peroxide to the degumming system obtained in step (1) to remove residual glycerides on the surface of silk fibroin, and at the same time carry out low-temperature bleaching of mulberry silk at a temperature of 40°C and a pH of 6.5 for 1 hour to obtain low-temperature Bleached mulberry silk products; wherein the amount of lipase relative to the degumming system is 2U / mL, the amount ...

Embodiment 2

[0075] A method for preparing degummed mulberry silk products based on a biological enzyme method, comprising the steps of:

[0076] (1) Protease and cutinase degumming:

[0077] Soak mulberry silk knitted jersey raw silk in a solution of alkaline protease and cutinase, degumming at a temperature of 55°C and pH 9 for 1 hour to obtain a degumming system; the amount of alkaline protease in the solution of alkaline protease and cutinase 4U / mL, the dosage of cutinase is 10U / mL;

[0078] (2) Lipase catalyzed low temperature bleaching:

[0079] Add lipase, glyceryl triacetate and hydrogen peroxide to the degumming system obtained in step (1) to remove residual glycerides on the surface of silk fibroin, and at the same time carry out low-temperature bleaching of mulberry silk at a temperature of 55°C and a pH of 7.5 for 2 hours to obtain low-temperature Bleached mulberry silk products; wherein the amount of lipase relative to the degumming system is 4U / mL, the amount of triacetin r...

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Abstract

The invention discloses a method for preparing degummed mulberry silk products based on a biological enzyme method, which belongs to the technical field of dyeing and finishing. In the present invention, protease and cutinase are used to treat mulberry silk products to remove sericin and hydrophobic lipids on the surface of mulberry silk; then, lipase, glycerol triacetate and hydrogen peroxide are added to the system to remove silk The glyceride remaining on the surface of the plain, catalyzing the hydrolysis of glycerol triacetate to produce acetic acid at the same time, the acetic acid and hydrogen peroxide react to produce peracetic acid, and the low-temperature bleaching of mulberry silk is carried out to realize the method of degumming processing of mulberry silk products by enzymatic method. Compared with the traditional rapid scouring method of alkali method and only protease degumming method, the method of the present invention has low production energy consumption, good degumming effect and reduced environmental pollution. The degummed silk product prepared by the method of the invention has a degumming rate of more than 23.5%, a whiteness of more than 82.5%, a wetting time of less than 1s, a strength of more than 562N and a COD of less than 1751mg/L.

Description

technical field [0001] The invention relates to a method for preparing degummed mulberry silk products based on a biological enzyme method, and belongs to the technical field of dyeing and finishing. Background technique [0002] Mulberry silk fiber products refer to silk or silk floss products processed from mulberry silk. Before the dyeing process of mulberry silk fabrics and the molding of silk floss products, refining and degumming are required. The main purpose is to remove sericin, pigments, waxes (such as fatty acid esters, glycerides, etc.) and foaming agents on mulberry silk fibers. Improve the whiteness, water absorption, gloss and feel of mulberry silk products. In the structure of mulberry silk, sericin wraps silk fibroin fibers, and sericin is easily dissolved and removed in low-concentration alkali and hot water. Compared with sericin, silk fibroin has high stability to chemical reagents and specific proteases, and is not easy to dissolve in water. According...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M16/00D06L4/13D06L4/12D06L4/40D06M101/10
CPCD06M16/003D06L4/13D06L4/12D06L4/40D06M2101/10
Inventor 王平余圆圆李自蓉王强周曼
Owner JIANGNAN UNIV
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