Composite nanofiber membrane as well as preparation method and application thereof

A technology of composite nanofibers and fiber membranes, used in textiles, papermaking, non-woven fabrics, etc., can solve the problems of fiber discontinuity, unpredictable results, spinning breakage, etc., and achieve uniform fiber diameter distribution, good mechanical properties, and operation. simple effect

Inactive Publication Date: 2021-05-07
SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chitosan is used as an important heavy metal-based adsorbent because it contains functional groups such as amino groups and hydroxyl groups. However, due to its high viscosity in acidic solutions, positive charges, and strong intramolecular and intermolecular chemical bonds , making it difficult to move freely during electrospinning, resulting in discontinuous fibers, beads, and even spinning breakage
For this reason, people once blended polymers such as oxyethylene, polyvinyl alcohol, polyethylene terephthalate, cellulose, polycaprolactone and chitosan to enhance the toughness and strength of spinning, but There are still technical problems such as the interaction between polymers, impurity problems, and the complexity of the process due to the large number of parameters, which make it difficult to predict the results.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 proposes that a kind of fiber diameter is 50nm-100nm composite nanofiber film, and its preparation method comprises the following steps:

[0035] (1) Dissolving β-cyclodextrin, chitosan and gelatin in the first solvent to obtain a mixed solution with a mass concentration of 2%. Wherein, the mass ratio of the β-cyclodextrin, the chitosan and the gelatin is 1:5:0.1. The first solvent is a solvent obtained by mixing glacial acetic acid with a mass concentration of 3% and dilute hydrochloric acid with a mass concentration of 1% at a volume ratio of 1:6.

[0036] (2) Mix polyvinyl alcohol and nano-silver antibacterial agent in the second solvent to obtain a dispersion solution with a mass concentration of 1%. Wherein, the mass ratio of the polyvinyl alcohol to the nano-silver antibacterial agent is 40:1. The second solvent is a solvent obtained by mixing glycerin and 3% ethanol at a volume ratio of 1:1.

[0037] (3) The mixed solution and the dispersed soluti...

Embodiment 2

[0040] Embodiment 2 proposes that a kind of fiber diameter is 100nm-200nm composite nanofibrous film, and its preparation method comprises the following steps:

[0041] (1) Dissolving β-cyclodextrin, chitosan and gelatin in the first solvent to obtain a mixed solution with a mass concentration of 25%. Wherein, the mass ratio of the β-cyclodextrin, the chitosan and the gelatin is 1:2:3. The first solvent is a solvent obtained by mixing glacial acetic acid with a mass concentration of 1% and dilute hydrochloric acid with a mass concentration of 5% at a volume ratio of 1:2.

[0042] (2) Mix polyvinyl alcohol and nano-silver antibacterial agent in the second solvent to obtain a dispersion solution with a mass concentration of 12%. Wherein, the mass ratio of the polyvinyl alcohol to the nano-silver antibacterial agent is 20:1. The second solvent is a solvent obtained by mixing glycerin and 5% ethanol at a volume ratio of 1:3.

[0043] (3) Mix the mixed solution with the disperse...

Embodiment 3

[0046] Embodiment 3 proposes that a kind of fiber diameter is 150nm-250nm composite nanofiber film, and its preparation method comprises the following steps:

[0047](1) Dissolving β-cyclodextrin, chitosan and gelatin in the first solvent to obtain a mixed solution with a mass concentration of 12%. Wherein, the mass ratio of the β-cyclodextrin, the chitosan and the gelatin is 1:3:1. The first solvent is a solvent obtained by mixing glacial acetic acid with a mass concentration of 2% and dilute hydrochloric acid with a mass concentration of 3% at a volume ratio of 1:4.

[0048] (2) Mix polyvinyl alcohol and nano-silver antibacterial agent in the second solvent to obtain a dispersion solution with a mass concentration of 6%. Wherein, the mass ratio of the polyvinyl alcohol to the nano-silver antibacterial agent is 30:1. The second solvent is a solvent obtained by mixing glycerin and ethanol with a concentration not greater than 5% at a volume ratio of 1:2.

[0049] (3) Mix th...

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Abstract

The invention provides a preparation method of a composite nanofiber membrane. The method comprises the following steps of dissolving beta-cyclodextrin, chitosan and gelatin in a first solvent to obtain a mixed solution with the mass concentration of 2-25%; mixing polyvinyl alcohol and a nano-silver antibacterial agent in a second solvent to obtain a dispersion solution with the mass concentration of 1-12%; mixing the mixed solution with the dispersion solution according to a mass ratio of 1:(0.8-1.5), and carrying out electrostatic spinning to obtain a fiber membrane prefabricated product; and crosslinking the fiber membrane prefabricated product to prepare the composite nanofiber membrane. The preparation method of the composite nanofiber membrane is simple to operate, low in time consumption and high in efficiency, and the nanofiber membrane prepared by the method is uniform in fiber diameter distribution and has good mechanical property, antibacterial property and biocompatibility.

Description

technical field [0001] The invention belongs to the field of nanofiber membrane preparation, and in particular relates to a composite nanofiber membrane and its preparation method and application. Background technique [0002] Electrospinning is an important method for preparing ultrafine fibers. It is mainly to bring thousands to tens of thousands of volts of high-voltage static electricity to the polymer solution or melt, and the charged polymer droplets are stretched under the action of the electric field force. . When the electric field force is strong enough, the polymer droplets can overcome the surface tension to form a jet stream. The thin stream evaporates the solvent during the injection process, the fibers solidify, and finally fall on the receiving device to form a fiber mat similar to a non-woven fabric. Fibers prepared by electrospinning are much thinner than traditional methods, and their diameters are generally between tens of nanometers and hundreds of nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/728
CPCD04H1/4382D04H1/728
Inventor 李普旺杨子明王超吕明哲周闯何祖宇刘运浩宋书会刘信鹏潘晴彦阮湘梅
Owner SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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