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A kind of preparation method of hollow multilayer structure fiber and obtained fiber and its application

A multi-layer structure and fiber technology, which is applied in the manufacture of hollow filaments, fiber treatment, fiber chemical characteristics, etc., can solve the problems that multi-layer structure fibers cannot break through

Active Publication Date: 2021-08-13
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the multi-layer structure fiber constructed by microfluidics can only be called partitioned fiber, and its size is limited to the micro-nano scale. The diameter of the fiber is 100-200 μm, the length is in the range of several meters, and the number of layers is the largest. There are 3 layers, and there is no gap between the layers, so the preparation of multi-layer structural fibers in the sense of the macro scale is still unable to break through

Method used

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  • A kind of preparation method of hollow multilayer structure fiber and obtained fiber and its application
  • A kind of preparation method of hollow multilayer structure fiber and obtained fiber and its application
  • A kind of preparation method of hollow multilayer structure fiber and obtained fiber and its application

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Effect test

preparation example Construction

[0043] The present invention provides a kind of preparation method of multi-layer structure fiber, described method comprises the following steps:

[0044] Step 1, adding low molecular weight polysaccharide polyelectrolyte into water to obtain spinning stock solution;

[0045] Step 2, adding high molecular weight polysaccharide polyelectrolyte into water to obtain a coagulation bath;

[0046] Step 3: inject the spinning dope obtained in step 1 into the coagulation bath obtained in step 2 through a syringe or a spinneret, and then carry out winding, washing and drying treatments to obtain the hollow multilayer structure fiber.

[0047] Wherein, the electrostatic interaction between the low-molecular-weight polysaccharide polyelectrolyte and the high-molecular-weight polysaccharide polyelectrolyte (respectively with opposite positive and negative charges) is used to complex the two to form a polyelectrolyte complex film; then , driven by osmotic pressure, low-molecular-weight p...

Embodiment approach

[0048] According to a preferred embodiment of the present invention, the low molecular weight polysaccharide polyelectrolyte and the high molecular weight polysaccharide polyelectrolyte have opposite charges.

[0049] In this way, an electrostatic interaction can be formed between the two.

[0050] In a further preferred embodiment, the low molecular weight polysaccharide polyelectrolyte is selected from chitosan oligosaccharides, sodium alginate oligosaccharides or carrageenan oligosaccharides.

[0051] In a further preferred embodiment, the high molecular weight polysaccharide polyelectrolyte is selected from chitosan, sodium alginate or carrageenan.

[0052] In the present invention, the obtained multi-layer structure fiber has a wide range of applications in the fields of adsorption, filtration and tissue engineering.

[0053]The reason is that: (1) polysaccharide polyelectrolyte has positive and negative charges, even if the complexation reaction occurs between the two, ...

Embodiment 1

[0103] According to the mass ratio of 20:1, weigh chitosan oligosaccharide with a molecular weight of 2000 Da and sodium alginate with a molecular weight of 300,000 Da respectively, and set aside;

[0104] The obtained chitosan oligosaccharide is dissolved in deionized water to obtain a spinning stock solution with a concentration of 20% by mass;

[0105] Add the sodium alginate taken to 1.17% sodium chloride (0.2MNaCl) solution to prepare a coagulation bath with a concentration of 1% by mass;

[0106] The spinning dope is injected into the coagulation bath through a syringe to carry out diffusion reaction, and then winding, washing and drying to obtain the polysaccharide polyelectrolyte hollow fiber.

[0107] Electron microscopy and strength tests were carried out on the obtained fibers, and the results were as follows: Figure 1~4 Shown:

[0108] (1) in figure 1 The overall cross-section of the hollow multilayer fiber is shown in , specifically, it can be seen that the pr...

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Abstract

The invention discloses a preparation method of a hollow multilayer structure fiber, the obtained fiber and its application, wherein, the low molecular weight polysaccharide polyelectrolyte is prepared into a spinning stock solution by a wet spinning method, and high The molecular weight polysaccharide polyelectrolyte is used as a coagulation bath, and the spinning stock solution is injected into the coagulation bath through a syringe, and the diffusion reaction is carried out, winding, washing and drying are obtained; the preparation method has simple equipment, low cost, good spinnability, It is suitable for large-scale production. At the same time, the prepared hollow multilayer fiber has the number of layers, the number of cavities, the controllability of diameter, good tensile strength, ultra-high specific surface area, and has excellent performance in catalysis, adsorption, filtration and tissue engineering. The field has a wide range of applications.

Description

technical field [0001] The invention relates to the field of multilayer structural fibers, in particular to the preparation of multilayer structural fibers, in particular to a method for preparing hollow multilayer structural fibers, the obtained fibers and applications thereof. Background technique [0002] Layered structures abound in nature. Various organisms spontaneously assemble and accumulate to form a multi-level spatial structure through various weak interactions between molecular fragments, and finally realize their biological functions, such as shells, trees, etc. Annual rings are arranged in a highly repeatable multi-layer pattern. Inspired by nature, scientists have carried out in-depth bionic design and preparation of multi-layer structure materials and their theoretical research. [0003] At present, the preparation of multilayer structure materials is mainly based on the LBL method. LBL is initially based on the electrostatic complexation between polyelectro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D13/00D01D5/06D01D5/24D01D5/30D01F8/18
CPCD01D5/06D01D5/24D01D5/30D01D13/00D01F8/18
Inventor 隋坤艳潘娜崔慧琳谭业强范汶鑫乔海燕王爽
Owner QINGDAO UNIV