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Method for preparing fabric finishing agent from sericin recycled from silk processing wastewater

A technology of fabric finishing agent and sericin, which is applied in fiber treatment, textile and papermaking, fiber type, etc. It can solve the problems that the specific product name is not listed, the dosage is not reported, etc., and achieve low cost, lower dyeing temperature, anti-wrinkle sex-enhancing effect

Inactive Publication Date: 2013-12-18
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, they adopt ready-made sericin powder and chitin (chitosan is a kind of deacetylation derivative of chitin) respectively, rather than adopting the chitosan directly obtained from degumming waste water as proposed in the present invention- Sericin flocculation composite product; moreover, the specific product names of cross-linking agent, penetrating agent and softening agent are not listed in this document, and the consumption amount of various components is not reported
[0006] In summary, although there have been reports on the use of chitosan flocculants to coagulate sericin wastewater, so far there has been no technology to use the obtained chitosan-sericin flocculation crude products to process fabric finishing agents. method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1. A method of reclaiming sericin from silk processing wastewater to prepare a fabric finishing agent, the following steps are carried out in sequence:

[0040] 1), adopt N-2-hydroxypropyltrimethylammonium chloride chitosan to treat wastewater:

[0041] The sericin waste water produced in the silk processing process is specifically the waste water produced in the silk degumming process (hereinafter referred to as waste water);

[0042]Utilize concentration to be that the pH=8 of the HCl solution regulation waste water of 10%, N-2-hydroxypropyl trimethyl ammonium chloride chitosan (chitosan quaternary ammonium salt) add-on is 1g / L (that is, every liter Add 1g of N-2-hydroxypropyltrimethylammonium chloride (chitosan) to the wastewater, stir quickly (300 rpm) to disperse, then stir slowly (50 rpm) for 20min, let stand, and wait until the flocs Precipitate and filter to obtain the crude flocculated product.

[0043] 2), Hydrolysis and refining of flocculation c...

Embodiment 2

[0051] Embodiment 2, a method for preparing fabric finishing agent from reclaiming sericin protein from silk processing wastewater, the following steps are carried out in sequence:

[0052] 1), the sericin waste water produced in the silk processing process is specifically the waste water produced in the silk reeling process (hereinafter referred to as waste water); chitosan is used as the flocculant, and the rest is equal to step 1) of Example 1.

[0053] A chitosan-sericin composite crude product was obtained as a flocculated crude product.

[0054] 2) Hydrolysis and refining of the crude flocculated product: the crude flocculated product was washed with cold water below 30°C, filtered through gauze (100 mesh, 3 layers), and the product was hydrolyzed in water at 140°C under high temperature and high pressure (0.362MPa) for 0.5h. Refined flocculation products were obtained; after the refined flocculation products were rapidly cooled (3°C / min) to room temperature, they were f...

Embodiment 3

[0060] Embodiment 3, a kind of method that reclaims sericin protein from silk processing waste water and prepares fabric finishing agent, carries out following steps successively:

[0061] 1), the sericin waste water produced in the silk processing process is specifically the waste water produced in the cocoon cooking process (hereinafter referred to as waste water); carboxymethyl chitosan is used as the flocculant, and the rest is equal to step 1) of Example 1.

[0062] Obtain, obtain the carboxymethyl chitosan-sericin composite crude product as the crude product of flocculation.

[0063] 2), Hydrolysis and refining of flocculation crude product:

[0064] The crude flocculated product above was washed with cold water below 30°C, filtered with gauze (100 mesh, 3 layers), and the product was hydrolyzed in water at 120°C under high temperature and high pressure (0.199MPa) for 2 hours to obtain a refined flocculated product; the refined flocculated product was rapidly cooled (3°...

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Abstract

The invention discloses a method for preparing a fabric finishing agent from sericin recycled from silk processing wastewater. The method comprises the following steps of: (1) treating sericin wastewater generated in a silk processing process with a flocculant by a coagulation process to obtain a flocculated crude product; (2) hydrolyzing and refining the flocculated crude product; and (3) preparing the finishing agent by any one of the following methods: uniformly stirring 2-6 parts by weight of the product obtained in the step (2), 0.4-0.8 part by weight of cross-linking agent, 0.3-0.6 part by weight of magnesium sulfate and the balance water to obtain a finishing liquid for cotton padding; or uniformly stirring 2-6 parts by weight of the product obtained in the step (2), 0.4-0.8 part by weight of cross-linking agent, 2-6 parts of sodium bisulfite and the balance water and reacting in 30-50 DEG C water bath for 50-80 minutes to obtain a finishing liquid for chemical fiber. The obtained product can be widely applied to modification treatment of cotton and chemical fiber fabric.

Description

technical field [0001] The invention belongs to the application field of textile finishing agents, and in particular relates to a method for preparing a fabric finishing agent by recovering sericin from silk processing wastewater. Background technique [0002] Silk has the reputation of "Fiber Queen". Its comfortable and high-quality fabrics are deeply loved by people, and its annual output and consumption are increasing day by day. At the same time, thousands of tons of sericin waste water are inevitably produced during its processing , mainly the waste water produced during cocoon cooking, silk reeling or silk degumming; these waste waters have the characteristics of large water volume, high turbidity and high COD value, and the waste water contains a large amount of protein, which will cause eutrophication of the water body. Generally, manufacturers simply treat these waste water and discharge them directly. Although the waste water is non-toxic, it will cause a large num...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/15D06M15/03D06M13/123D06M13/207D06M13/192D06M11/56D06M101/32D06M101/34
Inventor 林俊雄汪澜王磊
Owner ZHEJIANG SCI-TECH UNIV
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