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Method for physical refinement of nano-bacteria cellulose superfine fiber

A bacterial cellulose and microfiber technology, applied in fiber processing, artificial filament cleaning/drying, filament/thread forming, etc., can solve the problem of single product structure, low added value of products, insufficient investment in deep processing and application research, etc. problems, to achieve the effect of clean processing method, wide range of application fields and high efficiency

Inactive Publication Date: 2015-11-11
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, the processing of ultra-fine and ultra-long bacterial cellulose fibers has great technical difficulties. First, there is no simple, convenient, and high-yield physical processing method; the second is to further study and utilize the molding and molding process of bacterial cellulose The technology has not yet been resolved; the third is as a biomedical material, its long-term effect on organisms, in vivo degradability, compatibility with host tissues and cells, and changes in the mechanical, physical and chemical properties of bacterial cellulose in vivo, etc. A series of issues still need further research
Fourth, there are problems such as single product structure, insufficient investment in product deep processing and applied research, and low product added value.

Method used

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  • Method for physical refinement of nano-bacteria cellulose superfine fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A holding roller with a diameter of 20 mm is used to hold and feed the bacterial cellulose wet film, and the feeding speed is 10 mm / min.

[0022] At a diameter of 300mm, a rotational speed of 400 rpm, and a planting density of 2 roots / cm 2 Under the action of needle-punched licker-in rollers, the bacterial cellulose wet film is carded and divided to obtain ultrafine bacterial cellulose fibers with a fiber diameter of 450nm and a length of 5-100mm. The acupuncture length is 0.1cm, the diameter of the acupuncture shaft is 0.001mm, the diameter of the acupuncture tip is 1um, and the length of the acupuncture tip is 1mm.

[0023] The obtained bacterial cellulose fiber is filtered through a filter press, and the prepared bacterial cellulose ultrafine fiber has a moisture content of 20,000%, a diameter of the ultrafine fiber of 450 nm, and a length of the ultrafine fiber of 5 to 100 mm.

Embodiment 2

[0025] Use a holding roller with a diameter of 30mm to hold and feed the bacterial cellulose wet film, and the feeding speed is 20mm / min.

[0026] At a diameter of 300mm, a rotational speed of 400 rpm, and a planting density of 20 roots / cm 2 Under the action of needle-punched licker-in rollers, the bacterial cellulose wet film is carded and divided to obtain ultrafine bacterial cellulose fibers with a fiber diameter of 450nm and a length of 5-100mm. The acupuncture length is 1cm, the diameter of the acupuncture shaft is 0.1mm, the diameter of the acupuncture tip is 10um, and the length of the acupuncture tip is 2mm.

[0027] The obtained bacterial cellulose fiber is filtered through a filter press, and the prepared bacterial cellulose ultrafine fiber has a moisture content of 20,000%, a diameter of the ultrafine fiber of 350 nm, and a length of the ultrafine fiber of 5 to 100 mm.

Embodiment 3

[0029] Use a holding roller with a diameter of 40mm to hold and feed the bacterial cellulose wet film, and the feeding speed is 40mm / min.

[0030] At a diameter of 300mm, a rotational speed of 400 rpm, and a planting density of 100 roots / cm 2 Under the action of needle-punched licker-in rollers, the bacterial cellulose wet film is carded and divided to obtain ultrafine bacterial cellulose fibers with a fiber diameter of 450nm and a length of 5-100mm. The acupuncture length is 2cm, the diameter of the acupuncture shaft is 2mm, the diameter of the acupuncture tip is 20um, and the length of the acupuncture tip is 5mm.

[0031] The obtained bacterial cellulose fiber is filtered through a filter press, and the prepared bacterial cellulose ultrafine fiber has a moisture content of 20,000%, a diameter of the ultrafine fiber of 250 nm, and a length of the ultrafine fiber of 5 to 100 mm.

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Abstract

A method for physically refining nano-bacterial cellulose microfiber includes taking a wet bacterial cellulose film as a matrix material, making the wet bacterial cellulose film into bacterial cellulose fibers via high-speed puncturing, slitting and carding, and subjecting the obtained bacterial cellulose fibers to filter pressing via a filter press to prepare cellulose microfibers with certain moisture content, diameter and length. The method has the advantages that the cellulose microfibers are long, good in fineness and non-toxic, a processing method is clean, simple, economical and high in efficiency, and processed fibers are wide in application fields.

Description

technical field [0001] This patent relates to a method for processing superfine fibers, in particular to a method for processing nano-bacteria cellulose superfine fibers. Background technique [0002] The molecular structure of bacterial cellulose (BC) is basically the same as that of plant cellulose, but its important structural features and properties make its practical application significance far greater than that of plant cellulose. It not only has good mechanical properties, gas permeability, bioaffinity, biocompatibility, biocompatibility and good biodegradability, but also has high purity, high degree of polymerization, high crystallinity, high water content The physical and chemical properties such as high mechanical stability and high mechanical stability are superior to plant cellulose, and these properties are all caused by the specific network nano-supramolecular structure formed in the aqueous medium. Therefore, it is recognized as a new type of natural bio-na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/42D01D10/06C08J7/00C08L1/00
Inventor 张迎晨吴红艳
Owner ZHONGYUAN ENGINEERING COLLEGE
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