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Method for separating and extracting fibrillar structure body in natural keratin fiber with organic acid solvent

A technology for separating keratin fibers and solvents, which is applied in the field of natural fiber processing, can solve the problems that hair fibers are not easily degraded naturally, environmental pollution, etc., and achieves the effects of good biocompatibility, little environmental pollution, and wide application prospects.

Inactive Publication Date: 2013-01-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hair fibers are not easy to degrade naturally, if these non-spinnable wools are discarded randomly, it will cause great environmental pollution

Method used

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  • Method for separating and extracting fibrillar structure body in natural keratin fiber with organic acid solvent
  • Method for separating and extracting fibrillar structure body in natural keratin fiber with organic acid solvent
  • Method for separating and extracting fibrillar structure body in natural keratin fiber with organic acid solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] After the wool 1g after loosening and removing impurities is washed and dried with acetone, it is cut into 3mm long fiber segments, immersed in an Erlenmeyer flask containing 80% formic acid aqueous solution with a weight concentration of 100ml, and a condensation reflux device is installed on the Erlenmeyer flask. Heat the mixture to boiling, boil and reflux for 3 hours, filter the unreacted natural keratin fibers with an 80-mesh screen, and filter the filtrate with a 350-mesh screen to obtain keratin fibers with a diameter of 3-5 μm (length 80-120 μm). The fibril structure was washed repeatedly with distilled water, collected by centrifugation at 18° C. at 5000 rpm for 0.4 h to remove organic acids, and then dried to obtain the final product. The yield of the isolated structure was 33.2%.

[0031] The obtained keratin fibrillar structure with a diameter of 3-5 μm (length of 80-120 μm) is mixed with a solid-liquid ratio of 1 g / 100 ml in a formic acid solution with a co...

Embodiment 2

[0033]Wash and dry 4g of cow hair after opening and removing impurities, cut it into 6mm long pieces, immerse it in a flask filled with 100ml of dichloroacetic acid with a weight concentration of 70%, and ultrasonicate it in a constant temperature water bath at 20°C. In the oscillator, the frequency is 20kHz, the power is 200W, and the vibration is 2h. Filter through a 120-mesh screen to remove unreacted natural keratin fibers, and filter the filtrate with a 450-mesh screen to obtain a fibril structure with a diameter of 3-5 μm (length of 80-120 μm). The obtained product was repeatedly washed with distilled water, collected by centrifugation at 25° C. at 7000 rpm for 0.2 h to remove the organic acid, and then dried to obtain the final product. The yield of the isolated structure was 39.6%.

[0034] The obtained keratin fibrillar structure with a diameter of 3-5 μm (length of 80-120 μm) was mixed at 90° C. Stir at 600r / min for 6h. Use a 400-mesh sieve to remove unbroken stru...

Embodiment 3

[0036] Wash and dry 2 g of the discarded human hair after opening and removing impurities, cut it into 5 mm long pieces, immerse it in a flask containing 100 ml of trifluoroacetic acid with a weight concentration of 70%, and set the temperature in a constant temperature water bath at 20 ° C at 50 rpm. Stir for 6 hours, filter through a 100-mesh sieve to remove unreacted natural keratin fibers, and filter the filtrate through a 400-mesh sieve to obtain fibril structures with a diameter of 3-5 μm (length 80-120 μm). The obtained product was repeatedly washed with distilled water, collected by centrifugation at 15° C. at 3000 rpm for 1 h to remove the organic acid, and then dried to obtain the final product. The yield of the isolated structure was 33.7%.

[0037] The obtained diameter is 3-5 μ m (length is 80-120 μ m) keratin fibrillar structure body, with solid-liquid ratio 2g / 100ml, immerse in the flask that is equipped with the trifluoroacetic acid solution of 70% weight perce...

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Abstract

The technical proposal of the invention provides a method for separating and extracting fibrillated structural body from wool natural keratin fiber by organic acid solvent. The method is characterized in that the concrete steps are as follows: the treatments of opening and scotching, impurity-removing, cleaning and drying are carried out on natural keratin fiber sequentially and then the natural keratin fiber is cut into fiber segments with the length of 3-6mm to be soaked in polar micromolecule organic acid solution with solid-liquid ratio of 1-4g / 100ml for boiling, refluxing, stirring or ultrasonic oscillating or smashing; and the obtained mixture is filtered by a screen mesh to obtain the fibrillated structural body with the diameter of 3-5 micrometers which is cleaned by distilled water and then is dried. The invention has the advantages that a prepared keratin fiber product is a fibrillated and spindly anisotropic body; the method is simple and easy and has high yield; the methodcarries out partial dissolving separation and has low energy consumption; and the solvent can be recycled and has less pollution to the environment.

Description

technical field [0001] The invention relates to a method for separating and extracting fibrillar structures in natural keratin fibers with an organic acid solvent, and belongs to the technical field of natural fiber processing. Background technique [0002] Wool is an important natural keratin fiber. my country's textile industry consumes more than 600,000 tons of wool every year. Due to the weak points and uneven quality of wool itself, a large amount of waste wool is produced in the textile processing process. Hair fibers are not easy to degrade naturally, and if these non-spinnable wools are discarded at will, it will cause great environmental pollution. The content of keratin in wool is as high as more than 90%, which is a good renewable material and has wide application prospects. Therefore, the recycling of waste wool is not only beneficial to environmental protection but also can bring good economic benefits. [0003] Protein powder is an important raw material and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08H1/06
Inventor 范杰于伟东刘洋
Owner DONGHUA UNIV
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