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Preparation method of bacterial cellulose composite polymer superfine fiber material

A composite polymer, bacterial cellulose technology, applied in the chemical post-treatment of synthetic polymer rayon, chemical post-treatment of cellulose/protein rayon, fiber treatment, etc., can solve the problem of difficult to prepare ultra-fine fibers. complex, destroying the three-dimensional nano-network structure of bacterial cellulose, etc., to achieve the effect of broad industrial application prospects, expansion of application fields, and simple and easy preparation process

Active Publication Date: 2014-01-01
钟春燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can prepare bacterial cellulose composite materials, but the three-dimensional nano-network structure of bacterial cellulose itself is often destroyed during the preparation process, and it is difficult to prepare composites with ultrafine fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Soak the bacterial cellulose obtained from the fermentation of Acetobacter xylinum in 1% NaOH aqueous solution by mass, heat it at 60°C for 6 hours, and then wash it repeatedly with twice distilled water until neutral. Remove bacterial protein and residual culture medium adhering to the cellulose membrane.

[0019] (2) Dissolving chitosan in 0.1% acetic acid aqueous solution by mass, and preparing 0.1% chitosan acetic acid aqueous solution at room temperature. A bacterial cellulose membrane containing 90% by mass of absolute ethanol was covered on the rotating drum and connected to the negative electrode of the electrospinning device. The electrospinning voltage was set to 1 kV, and the distance between the spinneret and the bacterial cellulose membrane was 5.0 cm. The obtained chitosan fibers with a fiber diameter of 100 nm evenly covered the surface of the bacterial cellulose. The composite material is washed repeatedly with distilled water to neutrality, and th...

Embodiment 2

[0021] (1) Soak the bacterial cellulose obtained by fermenting and cultivating bacterial strains capable of synthesizing bacterial cellulose from Rhizobium in 2% by mass NaOH aqueous solution, heat at 70°C for 5 hours, and then use twice distilled water Rinse repeatedly until neutral. Remove bacterial protein and residual culture medium adhering to the cellulose membrane.

[0022] (2) Dissolve polyglycolide in hexafluoroisopropanol, and prepare a 10% polyglycolide solution at room temperature. An ethanol solution containing 75% by mass of absolute ethanol is immersed in a bacterial cellulose membrane to prepare a bacterial cellulose membrane with a mass percent of ethanol solution of 50%. Spread the bacterial cellulose membrane on the receiving plate and connect it to the negative electrode of the electrospinning device. The electrospinning voltage was set to 50kV, and the distance between the spinneret and the bacterial cellulose membrane was 10.0cm. The obtained polyglyco...

Embodiment 3

[0024] (1) Soak the bacterial cellulose obtained by fermenting and cultivating bacteria of the genus Sarcina that can synthesize bacterial cellulose in 3% NaOH aqueous solution, heat at 80°C for 4 hours, and then use it twice Rinse repeatedly with distilled water until neutral. Remove bacterial protein and residual culture medium adhering to the cellulose membrane.

[0025] (2) Dissolve polylactic acid in chloroform, and prepare a polylactic acid solution with a mass percentage of 1% at room temperature. A bacterial cellulose membrane with a water mass percentage of 60% was covered on the rotating drum and connected to the negative electrode of the electrospinning device. The electrospinning voltage was set to 100kV, and the distance between the spinneret and the bacterial cellulose membrane was 15.0cm. The obtained polylactic acid fibers with a fiber diameter of 1000 nm evenly cover the surface of the bacterial cellulose. The composite material is treated at a high tempera...

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Abstract

The invention discloses a preparation method of a bacterial cellulose composite polymer superfine fiber material. The method comprises following steps: dissolving polymers in an organic solvent to prepare a homogenous polymer spinning solution, ejecting the polymer spinning solution from a spinning nozzle by adopting an electrostatic spinning method, spraying the ejected polymer solution trickles on bacterial cellulose membranes, which contain absolution ethanol or water, and finally subjecting the processed bacterial cellulose membranes to a post-treatment so as to obtain the bacterial cellulose composite polymer superfine fiber material. The preparation method has the advantages of simple and practicable preparation process, convenient operation, and low cost; is capable of manufacturing a plurality of kinds of bacterial cellulose composite polymer superfine fiber materials, enlarges the application area of bacterial cellulose composite materials, and has a very vast industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of composite materials and their preparation, in particular to a method for preparing bacterial cellulose composite polymer superfine fiber materials. Background technique [0002] Bacterial cellulose is a polymer compound composed of glucose linked by β-1,4-glycosidic chains. As an excellent biological material, it has unique physical and chemical properties: bacterial cellulose has a natural three-dimensional nano-network Structure; high tensile strength and elastic modulus; high hydrophilicity, good air permeability, water absorption, water permeability, extraordinary water holding capacity and high wet strength; high biocompatibility and good biodegradability; biosynthesis The controllability of time performance, etc. Therefore, bacterial cellulose has a wide range of commercial applications, such as diaphragms for loudspeakers, wound care dressings, artificial skin, artificial blood vessels, etc. [0...

Claims

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Application Information

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IPC IPC(8): C08J5/00C08L1/02C08L5/08C08L67/04C08L89/00D01D5/00D01F11/00D01F11/02D01F11/04
Inventor 钟春燕
Owner 钟春燕
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