Preparation method of composite fiber of cellulose nanometer fibrils/alginate

A technology of nanofibrils and composite fibers, which is applied in the fields of cellulose/protein conjugated rayon, rayon manufacturing, and fiber chemical characteristics, and can solve the problems of composite fibers such as biosafety and in vivo degradability, and limited applications , to achieve the effect of high crystallinity, high modulus and high Young's modulus

Active Publication Date: 2017-03-22
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the strength of the prepared fiber is high, and the strength can be regulated by changing the reaction conditions, the biosafety and in vivo degradability of the composite fiber are affected due to factors such as the addition of chemical reagents and covalent crosslinking, which will also affect the Limit its application in medical and health materials such as tissue engineering scaffolds

Method used

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  • Preparation method of composite fiber of cellulose nanometer fibrils/alginate
  • Preparation method of composite fiber of cellulose nanometer fibrils/alginate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Under the action of ultrasonic waves, cellulose nanofibrils with an aspect ratio greater than 50 are uniformly dispersed in deionized water, and prepared into a gel-like suspension with a concentration of 2 wt % for later use.

[0054] Weigh sodium alginate and dissolve it in deionized water, let it stand for 3 hours to fully swell the sodium alginate, then stir for 4 hours to prepare a 4% sodium alginate solution by mass, and filter for later use.

[0055] According to the mass ratio of 1:100, slowly add the above-mentioned gelatinous cellulose nanofibril suspension into the sodium alginate solution while stirring, and continue to carry out ultrasonic dispersion treatment for 20 minutes to prepare cellulose nanofibril / seaweed Sodium acid mixed solution; stand for 8 hours to form spinning stock solution after defoaming.

[0056] The spinning dope is extruded into a coagulation bath at 25° C. at a speed of 10 m / min through wet spinning equipment. The diameter of the spin...

Embodiment 2

[0062] Under the action of ultrasonic waves, cellulose nanofibrils with an aspect ratio greater than 50 are uniformly dispersed in deionized water, and prepared into a gel-like suspension with a concentration of 2 wt % for later use.

[0063] Weigh sodium alginate and dissolve it in deionized water, let it stand for 3 hours to fully swell the sodium alginate, then stir for 4 hours to prepare a 4% sodium alginate solution by mass, and filter for later use.

[0064] According to the ratio of mass ratio 3:100, slowly add the above-mentioned gelatinous cellulose nanofibril suspension into the sodium alginate solution while stirring, and continue to carry out ultrasonic dispersion treatment for 20 minutes to prepare cellulose nanofibril / seaweed Sodium acid mixed solution;

[0065] After standing still for 8 hours to defoam, the spinning stock solution is formed.

[0066] The spinning stock solution is extruded into a coagulation bath at 25° C. at a speed of 10 m / min through wet sp...

Embodiment 3

[0071] Under the action of ultrasonic waves, cellulose nanofibrils with an aspect ratio greater than 50 are uniformly dispersed in deionized water, and prepared into a gel-like suspension with a concentration of 2 wt % for later use.

[0072] Weigh sodium alginate and dissolve it in deionized water, let it stand for 3 hours to fully swell the sodium alginate, then stir for 4 hours to prepare a 4% sodium alginate solution by mass, and filter for later use.

[0073] According to the ratio of mass ratio 5:100, slowly add the above-mentioned gelatinous cellulose nanofibril suspension into the sodium alginate solution while stirring, and continue to carry out ultrasonic dispersion treatment for 60min to prepare cellulose nanofibril / seaweed Sodium acid mixed solution;

[0074] After standing still for 8 hours to defoam, the spinning stock solution is formed.

[0075] The spinning dope is extruded into a coagulation bath at 25°C at a speed of 10m / min through wet spinning equipment, ...

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Abstract

The invention discloses a preparation method of composite fiber of cellulose nanometer fibrils/alginate. The method includes steps of evenly dispersing cellulose nanometer fibrils under ultrasound wave function, and preparing aqueous suspension; then evenly mixing with alginate solution and obtaining the mixed solution of cellulose/ sodium alga acid as spinning raw liquid; spinning by wet method and obtaining the composite fiber of cellulose nanometer fibrils/alginate. The preparation method is simple and easy to operate, the technique is green and environmental-friendly; the prepared composite fiber of cellulose nanometer fibrils/alginate is an environment-friendly recycled material, and has the same excellent biocompatibility and biological degradability as the pure alginate fiber; the oriental controllability of cellulose nanometer fibrils is enhanced, and the cellulose nanometer fibrils and the base alginate are formed to be an interpenetrating polymer network structure, thereby effectively improving the intensity and flexibility of composite fiber and greatly improving the adaptation of alginate fiber in textile and garment and medical treatment health domain.

Description

technical field [0001] The invention relates to a production method of alginate composite fiber, in particular to a preparation method of cellulose nanofibril / alginate composite fiber. Background technique [0002] Pure alginate fibers generally have the problems of low strength, high brittleness, poor spinnability, and poor physical comprehensive performance indicators, which directly limit the application and development of alginate fibers. Therefore, the production of high-strength alginate fibers and the improvement of their comprehensive physical and mechanical properties are one of the key issues to be solved in the production of alginate fibers. [0003] In the prior art, the commonly used solution is to reinforce the alginate fiber by means of copolymerization, blending or adding inorganic nanomaterials. in: [0004] The copolymerization method is not only complicated in process, but also involves the participation of chemical reactions, which requires the use of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/18D01F8/02D01F1/10
CPCD01F1/10D01F8/02D01F8/18
Inventor 潘颖韩光亭柳荣展张元明张宾
Owner QINGDAO UNIV
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