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Preparation method of chitosan/gallnut tannin composite fibers

A technology of gallic tannin and composite fiber, which is applied in the chemical characteristics of fibers, wet spinning, rayon manufacturing, etc., can solve the problems of glutaraldehyde cross-linking agent being toxic, not environmentally friendly, and difficult to degrade polyvinyl alcohol. Good stability, improved water resistance stability, strong antibacterial effect

Active Publication Date: 2020-04-14
南通郝旺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these methods, the glutaraldehyde crosslinking agent is toxic, and the polyvinyl alcohol is difficult to degrade, which are not environmentally friendly.

Method used

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  • Preparation method of chitosan/gallnut tannin composite fibers
  • Preparation method of chitosan/gallnut tannin composite fibers
  • Preparation method of chitosan/gallnut tannin composite fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Adopt the following method to prepare chitosan gallnut tannin composite fiber, concrete steps:

[0068] Step 1: Prepare spinning solution

[0069] (1) Chitosan is dissolved in the acetic acid solution that mass concentration is 2%, and the mass concentration of described chitosan in solution is 4%, and dissolving temperature is 25 ℃, and mechanical stirring 7h;

[0070] (2) Galla tannin is added in the chitosan acetic acid solution with respect to chitosan mass respectively in the consumption of 5%, 7.5%, 10%, 12.5%, 15%, mechanical stirring 28h under 25 ℃ of conditions, make Gallnut tannins are fully dissolved and mixed evenly with chitosan;

[0071] (3) Chitosan and Galla tannin mixed solution are subjected to ultrasonic treatment for 17min under ultrasonic conditions with a frequency of 20KHz to remove air bubbles in the solution to obtain spinning solution;

[0072] Step 2: Prepare coagulation bath

[0073] The preparation mass concentration is the NaOH aqueous s...

Embodiment 2

[0110] Adopt the following method to prepare chitosan gallnut tannin composite fiber, concrete steps:

[0111] Step 1: Prepare spinning solution

[0112] (1) Chitosan is dissolved in the acetic acid solution that mass concentration is 2%, and the mass concentration of described chitosan in solution is 3%, and dissolution temperature is room temperature, and mechanical stirring 8h;

[0113] (2) gallnut tannin is added in the chitosan acetic acid solution with respect to the consumption of chitosan quality 10%, mechanically stirred 36h under room temperature, gallnut tannin is fully dissolved and mixed with chitosan;

[0114] (3) Chitosan and Galla tannin mixed solution are subjected to ultrasonic treatment for 15min under ultrasonic conditions with a frequency of 20KHz to remove air bubbles in the solution to obtain spinning solution;

[0115] Step 2: Prepare coagulation bath

[0116] The preparation mass concentration is the NaOH aqueous solution of 5%, and adds ethanol, and...

Embodiment 3

[0123] Adopt the following method to prepare chitosan gallnut tannin composite fiber, concrete steps:

[0124] Step 1: Prepare spinning solution

[0125] (1) Chitosan is dissolved in the acetic acid solution that mass concentration is 2%, and the mass concentration of described chitosan in solution is 5%, and dissolving temperature is 40 ℃, mechanical stirring 6h;

[0126] (2) Galla tannin is added to the chitosan acetic acid solution in an amount of 10% relative to the chitosan mass, mechanically stirred for 20 h at 40° C., so that galla tannin is fully dissolved and mixed evenly with chitosan;

[0127] (3) Chitosan, Galla gall tannin mixed solution is under the ultrasonic condition of frequency 20KHz, sonication 20min is to remove the air bubble in the solution, obtains the spinning solution;

[0128] Step 2: Prepare coagulation bath

[0129] The preparation mass concentration is the NaOH aqueous solution of 2%, and adds ethanol, and the ethanol consumption is 25% of the N...

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Abstract

The invention discloses a preparation method of chitosan / gallnut tannin composite fibers, and belongs to the field of bio-based functional fibers. The composite fibers are the chitosan / gallnut tannincomposite fibers prepared by blending gallnut tannin and chitosan, are good in mechanical property and high in thermal stability, and have the extremely strong antibacterial effect on staphylococcus aureus. The chitosan / gallnut tannin composite fibers are prepared by blending the natural polyphenol gallnut tannin and the chitosan; the gallnut tannin becomes a cross-linking agent, so that the mechanical property of chitosan fibers is improved and the chitosan fibers are endowed with the functionality.

Description

technical field [0001] The invention relates to a preparation method of chitosan / gala tannin composite fiber, which belongs to the field of bio-based functional fibers. Background technique [0002] China is a big producer of chemical fibers, and the excessive dependence of chemical fibers on petroleum-based chemicals will lead to a large consumption of non-renewable resources such as petroleum, which will lead to problems such as resource depletion and environmental pollution. According to reports, the world's oil resources can be exploited for about 40 years, while my country's exploitable period does not exceed 30 years. In order to meet market demand, it is necessary to find corresponding alternative resources. Chitosan is a natural polymer compound that is abundant in the shells of shrimp and crabs. Chitosan not only has good biocompatibility, biodegradability and non-toxicity, but also has good antibacterial properties, which can inhibit the growth of certain pathoge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/00D01F1/10D01D5/06
CPCD01D5/06D01F1/103D01F9/00
Inventor 侯秀良朱小颖马博谋孙其松徐荷澜
Owner 南通郝旺新材料科技有限公司
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