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Collagen fiber modification method

Active Publication Date: 2016-03-09
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] Collagen fiber 0.2g, 20ml barium chloride solution (concentration is 0.5%) join in the reaction vessel that stirrer is arranged, leave standstill 12 hours after stirring for 4 hours; Slowly add 10ml sodium sulfate solution ( Concentration is 3%), the dropping speed of sodium sulfate solution is about 0.5 drop / second; Fiber / barium sulfate hybrid material.

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

Embodiment 2

[0019] Collagen fiber 0.3g, 20ml barium chloride solution (concentration is 1%) join in the reaction container that stirrer is arranged, leave standstill 12 hours after stirring for 4 hours; Slowly add 10ml sodium sulfate solution ( Concentration is 3%), the dropping speed of sodium sulfate solution is about 0.5 drop / second; Fiber / barium sulfate hybrid material.

[0020] The material is observed under a scanning electron microscope, and it can be found that barium sulfate crystal particles are attached to the surface of the collagen fibers, the particle size is 1-3 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 147%, and the water absorption rate is greatly reduced.

Embodiment 3

[0022] Collagen fiber 0.4g, 20ml barium chloride solution (concentration is 1.5%) join in the reaction container that stirrer is arranged, leave standstill 12 hours after stirring for 4 hours; Slowly add 10ml sodium sulfate solution ( Concentration is 3%), the dropping speed of sodium sulfate solution is about 0.5 drop / second; Fiber / barium sulfate hybrid material.

[0023] The material is observed under a scanning electron microscope, and it can be found that barium sulfate crystal particles are densely attached to the surface of 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 reduced.

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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 in particular relates to a method for modifying collagen fibers by generating barium sulfate particles in situ on collagen fibers. Background technique [0002] Collagen fiber is a natural linear polymer with abundant content in nature. It mainly exists in animal skin, bone, tendon 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 converted into valuable leather. my country is a big country in tanning, and a large amount of collagen fibers can be extracted from waste leather shavings through acid swelling and physical and mechanical effects. It can be seen that th...

Claims

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Application Information

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Patent Type & Authority Applications(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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