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Cattle hair keratin modified oily polyurethane film preparation method

A technology of polyurethane film and polyurethane film, which is applied in the field of preparation of bovine hair keratin modified oily polyurethane film, can solve the problems of poor water vapor permeability and biodegradation of oily polyurethane, improve water vapor permeability, reduce the amount of reagents, improve The effect of biodegradability

Active Publication Date: 2018-08-17
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of waste cattle hair treatment and oily polyurethane with poor water vapor permeability and refractory biodegradation, the invention provides a method for preparing a cow hair keratin-modified oily polyurethane film. Strong water, good water vapor permeability, easier to degrade under natural conditions, can be used as polyurethane surface material for artificial leather and synthetic leather or surface PU material for other composite sheets

Method used

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  • Cattle hair keratin modified oily polyurethane film preparation method
  • Cattle hair keratin modified oily polyurethane film preparation method
  • Cattle hair keratin modified oily polyurethane film preparation method

Examples

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Embodiment 1

[0028] (1) Extraction of bovine hair keratin: keratin is extracted by a combination of ionic liquid-alkali method-oxidation. The washed and processed dry bovine hair was added to a three-necked flask, and nitrogen was introduced into it, and then 1-allyl-3-methylimidazolium chloride with 10 times the gross weight was added, and the reaction was heated and stirred for 1 hour at 90° C., And continue to use 400W ultrasonic treatment for 20 minutes at this temperature, then wash the cow hair twice with clean water, and dry it in an oven at 80°C for 6 hours. The dried cattle hair pretreated by the ionic liquid was first treated with 1.5mol / L NaOH solution for 30 minutes at a temperature of 90°C and a solid-to-liquid ratio of 1:20, and then added dropwise with a mass of 30% ( Gross weight) of hydrogen peroxide, continue to react for 1h, and the mechanical stirring rate is 180r / min. After the reaction, the hydrolyzate was cooled to room temperature for filtration, and then dialyzed ...

Embodiment 2

[0033] (1) Extraction of bovine hair keratin: keratin is extracted by a combination of ionic liquid-alkali method-oxidation. The washed and dried bovine hair was added to a three-necked flask, and nitrogen was introduced into the flask, and then 1-butyl-3-methylimidazole acetate with a gross weight of 15 times was added, and the reaction was heated and stirred for 1.5 hours at 70 ° C. Continue to use 350W ultrasonic treatment for 25 minutes at this temperature, then wash the cow hair with clean water 3 times, and dry it in an oven at 80°C for 6 hours. Under the condition of temperature of 85℃ and solid-to-liquid ratio of 1:20, the dried cow hair pretreated by ionic liquid was first treated with 1mol / L NaOH solution for 30 minutes, and then added dropwise with a mass of 20% (gross weight). ) of hydrogen peroxide, continue to react for 1h, and the mechanical stirring rate is 140r / min. After the reaction, the hydrolyzate was cooled to room temperature for filtration, and then di...

Embodiment 3

[0038] (1) Extraction of bovine hair keratin: keratin is extracted by a combination of ionic liquid-alkali method-oxidation. The washed and dried bovine hair was added to a three-necked flask, and nitrogen gas was introduced into it, and then 1-ethyl-3-methylimidazole acetate with a gross weight of 20 times was added, and the reaction was heated and stirred for 2 hours at 60 ° C. And continue to use 300W ultrasonic treatment for 30 minutes at this temperature, then wash the cow hair 3 times with clean water, and dry it in an oven at 80°C for 6 hours. The dried cattle hair after pretreatment with ionic liquid was treated with 0.8mol / L NaOH solution for 30 minutes at a temperature of 80 °C and a solid-to-liquid ratio of 1:20, and then added dropwise with a mass of 15% ( Gross weight) of hydrogen peroxide, continue to react for 1h, and the mechanical stirring rate is 200r / min. After the reaction, the hydrolyzate was cooled to room temperature for filtration, and then dialyzed fo...

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Abstract

The invention relates to a cattle hair keratin modified oily polyurethane film preparation method. The method includes steps: (1) cattle hair keratin extraction; (2) cattle hair keratin hydrophobic modification; (3) cattle hair keratin modified oily polyurethane synthesis; (4) cattle hair keratin modified oily polyurethane film preparation. A polyurethane film prepared according to the method is bright and smooth in appearance, high in surface hydrophilicity, excellent in moisture permeability and easily degradable under natural conditions and can be used as a polyurethane surface material ofartificial leather and synthetic leather or a surface PU material of other composite sheets.

Description

technical field [0001] The invention belongs to the technical field of biomass material resource utilization and polymer composite materials, and particularly relates to a preparation method of a bovine hair keratin modified oily polyurethane film. Background technique [0002] At present, while the tanning industry has made great contributions to my country's economic development, it is also polluting the natural environment. In order to achieve clean production, the hair-preserving depilation method is often used in the process of depilation of cowhide, which not only effectively reduces the suspended solids and organic matter in the wastewater, reduces BOD and COD, but also reduces the amount of sulfide. However, due to the action of alkali, the recovered bovine hair is difficult to be applied in industries such as textile and felting, and it will become a new solid waste if it is not used. In the tanning industry, fully recovering wool and extracting keratin from it can...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/48C08G18/64C08G18/32C08G18/10C08J5/18C08L75/06C08L75/08
CPCC08G18/10C08G18/3206C08G18/4081C08G18/4238C08G18/48C08G18/4854C08G18/6446C08G18/664C08G18/6674C08J5/18C08J2375/06C08J2375/08C08G18/6511
Inventor 刘洁张斐斐李彦春李雪梅
Owner QILU UNIV OF TECH
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