Preparation method of tea polyphenols/chitosan nanofiber membrane

A technology of chitosan nano and tea polyphenols, applied in fiber treatment, fiber chemical characteristics, preparation of spinning solution, etc. promising effect

Inactive Publication Date: 2010-03-10
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There have been reports on the preparation of antibacterial silver / chitosan nanofiber membranes, and there have been "tea polyphenol air filter monofilament and its preparation process and application" (patent No. ZL01105837), but tea polyphenol / chitosan The preparation method of sugar nanofiber film has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Prepare an aqueous solution of acetic acid with a mass concentration of 2%, and dissolve chitosan with a relative molecular weight of 300,000 and a degree of deacetylation of 85% in the aqueous acetic acid solution to prepare a chitosan acetic acid with a mass concentration of 60g / L Solution.

[0017] (2) Put green tea polyphenols and NaCl into water at a temperature of 50° C., stir and dissolve to prepare an aqueous solution of tea polyphenols. In the aqueous solution of tea polyphenols, the concentration of tea polyphenols is 10 g / L and the concentration of NaCl is 25 g / L.

[0018] (3) The chitosan acetic acid solution and the tea polyphenol solution are mixed in a volume ratio of 5:1 to prepare a spinning solution with a concentration of 5% (w / v).

[0019] (4) Inject the prepared spinning solution into the syringe of the electrospinning device for electrospinning. The inner diameter of the nozzle of the syringe is 0.7 mm. The electrospinning process conditions are: the...

Embodiment 2

[0023] (1) Prepare an aqueous solution of acetic acid with a mass concentration of 3%, and dissolve chitosan with a relative molecular weight of 200,000 and a degree of deacetylation of 98% in the aqueous acetic acid solution to prepare a chitosan acetic acid with a mass concentration of 50g / L Solution.

[0024] (2) Put oolong tea polyphenols and NaCl into water at a temperature of 55° C., stir and dissolve to prepare a tea polyphenol aqueous solution. In the tea polyphenol aqueous solution, the tea polyphenol concentration is 8 g / L and the NaCl concentration is 20 g / L.

[0025] (3) The chitosan acetic acid solution and the tea polyphenol solution are mixed in a volume ratio of 6:1 to prepare a spinning solution with a concentration of 6% (w / v).

[0026] (4) Inject the prepared spinning solution into the syringe of the electrostatic spinning device, and the inner diameter of the nozzle of the syringe is 0.8 mm. The electrospinning process conditions are: voltage of 18kV, flow rate o...

Embodiment 3

[0030] (1) Prepare an aqueous solution of acetic acid with a mass concentration of 4%, and dissolve chitosan with a relative molecular weight of 400,000 and a degree of deacetylation of 80% in the aqueous acetic acid solution to prepare a chitosan acetic acid with a mass concentration of 55g / L Solution.

[0031] (2) Put green tea polyphenols and NaCl into water at 55° C., stir and dissolve to prepare a tea polyphenol aqueous solution. In the tea polyphenol aqueous solution, the tea polyphenol concentration is 9 g / L and the NaCl concentration is 25 g / L.

[0032] (3) The chitosan acetic acid solution and the tea polyphenol solution are mixed in a volume ratio of 8:1 to prepare a spinning solution with a concentration of 8% (w / v).

[0033] (4) Inject the prepared spinning solution into the syringe of the electrostatic spinning device, and the inner diameter of the nozzle of the syringe is 0.9 mm. The electrospinning process conditions are: the voltage is 18kV, the flow rate is 0.08mL / h...

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Abstract

The invention relates to a preparation method of tea polyphenols / chitosan nanofiber membrane, wherein, a tea polyphenols / chitosan nanofiber membrane is made from tea polyphenols / chitosan nanofibers with the diameter of 300 to 500 nm, and the preparation process of the tea polyphenols / chitosan nanofibers comprises the following processing steps: preparing a chitosan acid solution with the mass concentration of 40 g / L to 70 g / L; preparing a tea polyphenols solution; preparing a solution for spinning; filling the solution for spinning into a syringe of an electrostatic spinning device for carrying out electrostatic spinning, and obtaining the tea polyphenols / chitosan nanofibers. The invention has the advantages that the preparation process is simple, and the prepared membrane has broad-spectrum sterilization and higher bacteriostasis effect on escherichia coli and staphylococcus aureus within 24 hours. The invention can be used in the filed of medical treatment and health, food packagingand the like.

Description

(1) Technical field [0001] The invention relates to a preparation method of tea polyphenol / chitosan nanofiber membrane. It belongs to the technical field of nano composite fiber film preparation. (2) Background technology [0002] Various types of nanofiber films can be prepared using electrospinning technology. Although a single chitosan film has good biocompatibility, antibacterial properties, and has certain hemostatic and wound healing effects, its broad-spectrum antibacterial properties are poor, which greatly limits the application range of chitosan. [0003] Chitosan is widely present in the shells of arthropods such as shrimps and crabs. The annual synthesis amount in nature is second only to cellulose and has a wide range of uses. Chitosan is deacetylated to prepare chitosan, which has good film-forming properties, anti-infection effect, and promotes wound healing. Tea Polyphenols (TP) is the general term for catechins (flavanols), flavonoids, phenolic acids and anthocy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D1/02D04H3/16D01F9/00D01F1/10
Inventor 王鸿博高卫东费燕娜陈建强徐亮
Owner JIANGNAN UNIV
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