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Preparing method of hollow multilayer structure fibers, obtained fibers and application of fibers

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: 2019-02-15
QINGDAO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Preparing method of hollow multilayer structure fibers, obtained fibers and application of fibers
  • Preparing method of hollow multilayer structure fibers, obtained fibers and application of fibers
  • Preparing method of hollow multilayer structure fibers, obtained fibers and application of fibers

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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 preparing method of hollow multilayer structure fibers, the obtained fibers and application of the fibers. A wet spinning method is utilized for preparing a low-molecular-weight polysaccharide polyelectrolyte into a spinning solution, a high-molecular-weight polysaccharide polyelectrolyte is added into a coagulating groove to serve as a coagulating bath, the spinning solution is injected into the coagulating bath through an injector, a diffusion reaction is carried out, and winding, washing, drying are conducted to obtain the fibers. The preparing method is simple inequipment, low in cost, high in spinnability, and suitable for scale production; meanwhile, the prepared hollow multilayer fibers have controllability in the number of layers, the number of cavities and the diameter, good tensile strength and an ultrahigh specific surface area, and are widely applied in the fields of catalysis, adsorption, filtering, tissue engineering and the like.

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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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
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