A kind of modification method of collagen fiber

A collagen fiber modification technology, which is applied in the field of organic-inorganic hybrid materials, can solve the problems of low thermal stability, low mechanical strength, and high water absorption, and achieve good thermal stability, high mechanical strength, and low water absorption. Effect

Active Publication Date: 2017-06-09
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the shortcomings of collagen fibers such as high water absorption, easy deliquescence, low thermal stability, easy deterioration, and low mechanical strength, although the material has a wide range of sources, its industrial application is greatly restricted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 0.2g of collagen fibers and 20ml of barium chloride solution (with a concentration of 0.5%) to a reaction vessel with a stirrer, stir for 4 hours and then stand for 12 hours; then slowly add 10ml sodium sulfate solution dropwise under stirring conditions ( Concentration is 3%), the dropping rate of the sodium sulfate solution is about 0.5 drops / sec; after the addition is complete, let stand for 5 minutes and then suction filter and wash with water; finally, vacuum dry at 80℃ for 8 hours to obtain collagen Fiber / barium sulfate hybrid material.

[0017] Observing the material under a scanning electron microscope, it can be found that barium sulfate crystal particles are attached to the surface of the collagen fibers, with a size of 2-4 μm and a shape like a spindle-shaped particle. The water absorption rate of the collagen fiber material before modification is 442%, and the water absorption rate after modification is 179%, and the water absorption rate is greatly reduced...

Embodiment 2

[0019] Add 0.3g of collagen fiber and 20ml of barium chloride solution (concentration of 1%) into a reaction vessel with a stirrer, stir for 4 hours and then stand for 12 hours; then slowly add 10ml of sodium sulfate solution dropwise under stirring conditions ( Concentration is 3%), the dropping rate of the sodium sulfate solution is about 0.5 drops / sec; after the addition is complete, let stand for 5 minutes and then suction filter and wash with water; finally, vacuum dry at 80℃ for 8 hours to obtain collagen Fiber / barium sulfate hybrid material.

[0020] Observing the material under a scanning electron microscope, it can be found that barium sulfate crystal particles are attached to the surface of collagen fibers, the particle size is 1-3μm, and the shape is like a spindle-shaped particle. The water absorption rate of the collagen fiber material before modification is 442%, and the water absorption rate after modification is 147%, and the water absorption rate is greatly reduc...

Embodiment 3

[0022] Add 0.4g of collagen fiber and 20ml of barium chloride solution (concentration of 1.5%) to a reaction vessel with a stirrer, stir for 4 hours and then stand for 12 hours; then slowly add 10ml of sodium sulfate solution dropwise under stirring ( Concentration is 3%), the dropping rate of the sodium sulfate solution is about 0.5 drops / sec; after the addition is complete, let stand for 5 minutes and then suction filter and wash with water; finally, vacuum dry at 80℃ for 8 hours to obtain collagen Fiber / barium sulfate hybrid material.

[0023] Observing the material under a scanning electron microscope, it can be found that barium sulfate crystal particles are densely attached to the surface of the collagen fibers, the particle size is 1-2 μm, and the shape is like a spindle-shaped particle. The water absorption rate of the collagen fiber material before modification is 442%, and the water absorption rate after modification is 142%, and the water absorption rate is greatly red...

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Abstract

The invention discloses a collagen fiber modification method. The collagen fiber modification method comprises weighing 2-5 parts by weight of collagen fibers, adding the collagen fibers into 200 parts by weight of a barium chloride solution with a concentration of 0.5-2%, carrying out stirring for 4h, carrying out standing for 12h, slowly and dropwisely adding 100 parts by weight of a sodium sulfate or potassium sulfate solution with a concentration of 3% into the mixture under the condition of stirring and a dropwise addition rate of 0.5 drops per second, then carrying out standing for 5min, carrying out suction filtration, carrying out water washing, and carrying out vacuum drying at a temperature of 60-80 DEG C fort 5-8h to obtain the collagen fiber / barium sulfate hybrid material. The modified collagen fibers have low water absorption, high mechanical strength and high heat stability, has the characteristics of flame retardation and antibiosis and greatly widens an application field of collagen fibers. The collagen fiber modification method can be operated simply, realizes a reaction at a normal temperature under normal pressure, has a low equipment requirement and a low raw material cost and is suitable for large scale production.

Description

Technical field [0001] The invention belongs to the technical field of organic-inorganic hybrid materials, and specifically relates to a method for generating barium sulfate particles in situ on collagen fibers to modify the collagen fibers. Background technique [0002] Collagen fiber is a natural linear polymer that is abundant in nature. It mainly exists in animal skin, bones, tendons and other tissues. It is an important structural protein in connective tissue. The leather industry produces a large amount of waste leather, of which collagen fibers account for more than 90%. According to the research statistics of the British Leather Technology Research Center, only 27% of the input quality of animal skins used for tanning is finally transformed into valuable leather. my country is a major tannery country. Through acid expansion and physical and mechanical action, a large amount of collagen fibers can be extracted from waste leather shavings. It can be seen that the source o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/56D06M101/14
CPCD06M11/56D06M2101/14
Inventor 周虎周杰李宁刘清泉姜绮梦韩永康
Owner HUNAN UNIV OF SCI & TECH
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