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Method for preparing high-strength chitosan fiber

A chitosan fiber, high-strength technology, applied in the field of textiles, can solve the problems of limiting the application range of chitosan fibers, small elongation at break, poor mechanical properties, etc. Density-enhancing effect

Active Publication Date: 2014-08-20
深圳市博立生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] At present, one of the outstanding problems faced by pure chitosan fiber producers is that especially in the application of chitosan, chitosan fibers are generally required to have high mechanical properties, but chitosan fibers are not strong in terms of strength. Compared with other commonly used fibers, the performance is poorer, the elongation at break is also smaller, and the mechanical properties are poorer, such as fiber strength, interlocking strength, etc., thus limiting the scope of application of chitosan fibers

Method used

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  • Method for preparing high-strength chitosan fiber

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Effect test

preparation example Construction

[0038] A kind of preparation method of high strength chitosan fiber, such as figure 1 shown, including the following steps:

[0039] Step 1. After mixing the chitosan solution and the polyvinyl alcohol solution, add a cross-linking agent, stir evenly, and vacuum defoam for 24 hours to obtain a spinning stock solution for subsequent use;

[0040] Wherein, in order to improve the utilization rate of raw materials, preferably, the concentration of the chitosan solution is 0.5%-20%, preferably 3%-6%; the concentration of the polyvinyl alcohol solution is 0.5%-25% %, preferably 5%-15%;

[0041] The mass ratio of the solute in the chitosan solution to the solute in the polyvinyl alcohol solution is 9:1-1:1.

[0042] Simultaneously in order to improve the purity of raw material, wherein chitosan is the chitosan of degree of deacetylation greater than 85%, the number average molecular weight of described chitosan is 1 * 10 4 -5×10 6 ; In order to improve the textile performance an...

Embodiment 1

[0061] A kind of preparation method of high strength chitosan fiber:

[0062] Preparation concentration is that the chitosan solution of 2.5% and the polyvinyl alcohol (PVA) solution that concentration is 8%, according to the mass ratio of the solute (being chitosan and polyvinyl alcohol) of chitosan solution and polyvinyl alcohol solution is 3:1, mix chitosan solution and polyvinyl alcohol solution, stir evenly, vacuum degassing for 24 hours, obtain spinning stock solution, and set aside; among them, the number average molecular weight of chitosan used is 2×10 5 , the number average molecular weight of polyvinyl alcohol is 8×10 4 .

[0063] The spinning stock solution is controlled to spin at 40°C, and the obtained spinning stock solution is subjected to wet spinning, and the method of ultrasonic oscillation is used to separate the fibers and improve the fiber strength to obtain chitosan fibers, which are used in wet spinning The coagulation bath is 2wt% aqueous sodium hydr...

example 2

[0066] A kind of preparation method of high strength chitosan fiber:

[0067] Preparation concentration is that the chitosan solution of 2% and the polyvinyl alcohol (PVA) solution that concentration is 10%, according to the mass ratio of the solute (being chitosan and polyvinyl alcohol) of chitosan solution and polyvinyl alcohol solution is 4:1, mix chitosan solution and polyvinyl alcohol solution, stir evenly, vacuum degassing for 24 hours, get spinning stock solution, and set aside; the number average molecular weight of chitosan is 2×10 5 , the number average molecular weight of polyvinyl alcohol is 8×10 4 .

[0068] The spinning stock solution is controlled to spin at 40°C, and the obtained spinning stock solution is subjected to wet spinning, and ultrasonic vibration is used to separate the fibers and improve the fiber strength to obtain chitosan fibers, which are used in wet spinning The coagulation bath is 1% sodium hydroxide aqueous solution and 2wt% ethanol, and th...

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Abstract

The invention relates to the technical field of textiles and in particular relates to a method for preparing a high-strength chitosan fiber. The method for preparing the high-strength chitosan fiber comprises the following steps: step 1, mixing a chitosan solution and a polyvinyl alcohol solution, adding a cross-linking agent, uniformly stirring, and performing vacuum defoamation for 24 hours, thus obtaining a spinning stock solution for later use; and step 2, spinning the obtained spinning stock solution in a coagulating bath at the temperature of 25-45 DEG C, performing thread division and fiber strength improvement by adopting an ultrasonic oscillation method, thus obtaining the chitosan fiber. The chitosan fiber prepared by the method has good mechanical property, and the spinning property and knitting property of the chitosan fiber are improved.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a preparation method of high-strength chitosan fibers. Background technique [0002] Of the organic matter in nature, cellulose is the most abundant, followed by protein, and chitin ranks third. Chitosan is an important derivative of chitin, because chitin has a wide range of sources, such as crustacean shrimp, crab, insect shells, fungal (yeast, mold) cell walls and plant (such as mushroom) cell walls. [0003] The preparation process and method of chitosan are also different. The existing preparation of chitosan from chitin is mainly deacetylation by alkaline method. First, soak the carapace with acid to remove minerals; then soak it in solution to remove protein. . The process of obtaining chitosan from chitin is called deacetylation reaction. [0004] Chitosan is mostly white or off-white, slightly pearly, translucent, mostly flaky or powdery, odorless and non-toxic. Ch...

Claims

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Application Information

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IPC IPC(8): D01F6/96D01D1/02D01D5/06C08J3/24
Inventor 张平
Owner 深圳市博立生物材料有限公司