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Preparation method for high-strength wheat protein fiber

A wheat protein fiber and high-strength technology, which is applied in the field of wheat protein resource utilization, can solve the problems of poor physical and mechanical properties and chemical stability of regenerated protein fiber, low strength of wheat protein fiber, and shortened production cycle. The effect of improving tensile strength and elongation at break and increasing strength

Active Publication Date: 2015-04-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wheat protein has excellent hygrothermal stability, viscoelastic extensibility, thermal coagulation performance and environmental compatibility. It is an ideal raw material for the preparation of high-quality biological fibers, but the physical and mechanical properties and chemical stability of the regenerated protein fibers are poor. The wheat protein fiber obtained by the patent US 2006 / 0282958 has low strength and long aging time, and its applicability is not strong, so the purpose of the present invention is to improve the mechanical properties of pure wheat protein fiber and greatly shorten the production cycle, and use wheat protein for Made into fibers to broaden its range of applications and increase its added value

Method used

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  • Preparation method for high-strength wheat protein fiber
  • Preparation method for high-strength wheat protein fiber
  • Preparation method for high-strength wheat protein fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Add gluten powder to 65% ethanol solution according to the ratio of material to liquid 1:30, and stir in a water bath at 30°C for 2.5h to form a suspension, centrifuge at 4500r / min for 20min, and take the supernatant , the remaining solid was repeatedly extracted twice in the same way, the supernatants were mixed, concentrated by rotary evaporation, and then dried to obtain gliadin. After the final extraction of the centrifuged solid, add water according to the ratio of material to liquid 1:20, and adjust the pH to 10, then place it in a water bath at 55°C and stir for 2.5 hours, then centrifuge at 4500r / min for 20 minutes, take the supernatant, and repeat the extraction 2 times, the supernatants were combined, and ethanol was added to adjust the ethanol mass concentration to 65%, and the pH of the solution was adjusted to 7, then placed in a refrigerator at 4°C for 12 hours, and the precipitate obtained by centrifuging at 4500r / min for 20min was dried, namely...

Embodiment 2

[0019] Example 2: After purifying glutenin and gliadin according to the above method, mix glutenin and gliadin in a ratio of 2:1, add 6M guanidine hydrochloride and 1% sodium sulfide, and make a protein concentration of 15%. Protein solution, adjust the pH to 8, process the above solution under the microwave power of 30W / g solution for 2min to obtain the spinning stock solution, use a 1mL syringe to extrude the silk while it is hot, and enter the coagulation bath containing 5% sodium sulfate and 10% sulfuric acid, and the coagulation time 30min, and then the tow is taken out and washed three times in hot water, and stretched 3-6 times in length. The obtained fibers were heated at 85°C and 125°C for 1 hour respectively, and then fumigated with 25% glutaraldehyde steam for 48 hours to obtain wheat protein fibers which were the desired fibers.

Embodiment 3

[0020] Example 3: After the glutenin and gliadin were purified according to the above method, the glutenin and gliadin were mixed in a ratio of 1:2, and then 8M urea and saturated cysteine ​​were added to make a protein concentration of 18 % protein solution, adjust the pH to be 7, process the above solution under the microwave power 26W / g solution for 3min to obtain the spinning stock solution, use a 1mL syringe to extrude the silk while it is hot, and enter it into a coagulation bath containing 15% sodium sulfate and 15% sulfuric acid. The coagulation time is 15 minutes, and then the tow is taken out and washed three times in hot water, and stretched 3-6 times in length. The obtained fibers were heated at 85°C and 125°C for 1 hour respectively, and then fumigated with formaldehyde steam for 48 hours to obtain wheat protein fibers which were the desired fibers.

[0021] Comparison of the properties of the obtained wheat protein fiber with that of wool:

[0022]

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Abstract

The invention relates to a preparation method for high-strength wheat protein fiber, belonging to the field of wheat protein resource utilization. The preparation method comprises the following steps: mixing purified glutenin and wheat gliadin in a mass ratio of (1-2) to (2-1) to obtain a mixture I; adding and dissolving a denaturing agent and a reducing agent in the mixture I to obtain a mixture II, and processing the mixture II under microwaves with certain powder to obtain a spinning solution; and spinning, stretching, performing fumigation treatment by glutaraldehyde or formaldehyde steam to obtain the high-strength wheat protein fiber. The high-strength wheat protein fiber prepared by the preparation method disclosed by the invention has silk gloss, tensile strength and elongation at break which are close to those of wool, dry-state breaking strength of 0.9-1.4cN / dtex, dry-state elongation at break up of 28%-35%, and moisture regain of 10%-12% at 20 DEG C under 65%R.H.

Description

technical field [0001] The invention relates to a preparation method of high-strength wheat protein fiber, which relates to a method of improving mechanical properties such as breaking strength and elongation at break of wheat protein fiber by using microwave treatment, and belongs to the field of utilization of wheat protein resources. Background technique [0002] At present, with the increasing shortage of petroleum, coal and other resources, and the improvement of people's requirements for green, environmental protection and comfort, the preparation of pure natural protein fibers has broad application prospects. The regenerated soybean protein fiber developed in recent years has excellent moisture absorption and release properties, is flexible and fluffy, and has the smooth and waxy feel of cashmere. Its excellent comfort and skin-friendly properties are deeply loved by people and have been put into production. In addition to soybean protein fiber, the plant protein fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F4/00D01F1/10D01F11/02D01D1/02D01D5/06
Inventor 马晓军柳翠青
Owner JIANGNAN UNIV
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