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Composite functional filament with core-shell structure and preparation method thereof

A technology with composite functions and core-shell structure, which is applied in the manufacture of fire-resistant and flame-retardant filaments, conductive/antistatic filaments, rayon, etc., can solve the problems of low wet strength of filaments, low strength of Slow speed and other problems, to achieve the effect of improving spinning efficiency, broad application prospects and low cost

Active Publication Date: 2022-03-18
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are many problems in practical application, which limit the application of electrostatic self-assembly spinning.
(1) The electrostatic self-assembly spinning speed is slow, and the obtained fiber filaments have low strength
(2) The electrostatic self-assembly method usually uses raw materials that are soluble or dispersed in water, so that the prepared composite fiber filaments do not have water resistance, that is, the wet strength of the filaments is low, which cannot meet practical applications
(3) The currently reported electrostatic self-assembly spinning is operated on a flat plate (ACS Sustain.Chem.Eng., 2020, 8(2), 1137-1145), which cannot meet the conditions for industrial continuous production

Method used

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  • Composite functional filament with core-shell structure and preparation method thereof
  • Composite functional filament with core-shell structure and preparation method thereof
  • Composite functional filament with core-shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Add 100g of cationic nanocellulose to an appropriate amount of water to prepare a dispersion with a concentration of 0.1wt%, and add 100g of TEMPO oxidized nanocellulose (anionic nanocellulose) to an appropriate amount of water to prepare a dispersion with a concentration of 0.5wt%. The charge density of the cationic nanocellulose is 0.5mmol / g, and the charge density of the anionic nanocellulose is 1.5mmol / g. To the cationic nanocellulose dispersion, add 250 g of polyvinyl alcohol solution (dry weight 5 g) and 0.1 g of melamine formaldehyde resin with a concentration of 2 wt % successively, and stir separately to mix uniformly to obtain cationic nanocellulose dispersion I. Add 5 g of borax to the anionic nanocellulose dispersion, stir and mix uniformly to obtain anionic nanocellulose dispersion I. Anionic nanocellulose dispersion I was dropped on the bottom of a spinning tube with a diameter of 10 mm, then cationic nanocellulose dispersion I was dropped, and the interfac...

Embodiment 2

[0038] Add 100g of cationic guar gum to an appropriate amount of water to prepare a solution with a concentration of 1.2wt%; add 100g of TEMPO oxidized nanocellulose (anionic nanocellulose) to an appropriate amount of water to prepare a dispersion with a concentration of 0.1wt%. Wherein, the charge density of the cationic guar gum is 0.5 mmol / g, and the charge density of the anion nanocellulose is 3.0 mmol / g. In the cationic guar gum solution, adding concentration successively is that the cationic polyacrylamide solution 20g (dry weight 0.1g) of 0.5wt% and the polyamide polyamine epichlorohydrin solution 40g (dry weight 5g) that concentration is 12.5wt%, And stir separately to mix uniformly, obtain cationic guar gum solution I. Add 20 g of nano-ferric iron tetroxide to the anionic nanocellulose dispersion, and stir to make the mixture uniform to obtain the anionic nanocellulose dispersion I. Anionic nanocellulose dispersion I was dropped on the bottom of a spinning tube with ...

Embodiment 3

[0044] Add 100g of chitosan to an appropriate amount of water to prepare a solution with a concentration of 1.0% by weight; add 100g of sodium alginate to an appropriate amount of water to prepare a solution with a concentration of 1.2%. Among them, the charge density of chitosan is 3.0mmol / g, and the charge density of sodium alginate is 1.0mmol / g. In the chitosan solution, add successively the glyoxal polyacrylamide solution 50g (dry weight 0.25g) and epichlorohydrin 0.5g that concentration is 0.5wt%, and stir respectively and make mixing, obtain cationic chitosan solution I . Add 1 g of nano-silver particles to the sodium alginate solution, stir to make the mixture uniform, and obtain the anionic sodium alginate solution I. The sodium alginate solution I is dripped into the bottom of the spinning tube with a diameter of 50mm, and then the chitosan solution I is dripped into it; then the two interface layers are stretched upwards at a stretching speed of 50cm / min to obtain w...

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Abstract

The invention provides a method for preparing a functional composite fiber filament with a core-shell structure. The method comprises the following steps: (1) preparing an anionic polymer aqueous solution / dispersion liquid and a cationic polymer aqueous solution / dispersion liquid with the concentration of 0.1-1.2 wt%; the charge density of the anionic polymer and the charge density of the cationic polymer are both 0.5-3.0 mmol / g. (2) adding an auxiliary agent into the anionic polymer aqueous solution / dispersion liquid or the cationic polymer aqueous solution / dispersion liquid, and uniformly stirring to obtain an anionic polymer aqueous solution / dispersion liquid I and a cationic polymer aqueous solution / dispersion liquid I; and (3) firstly adding the anionic polymer solution / dispersion liquid I into the bottom of a spinning tube, then adding the cationic polymer solution / dispersion liquid I, stretching a viscous barrier of an interface to obtain wet fiber filaments, and drying to obtain the functional composite fiber filaments. According to the method, the strength of the composite fiber filament is improved, unexpected good wet strength is obtained, the method can be applied to a spinning device, the spinning efficiency is improved, and the method has important practical application prospects.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a functional fiber filament with a core-shell structure and a preparation method thereof, in particular to a high-strength, water-resistant functional composite filament. Background technique [0002] At present, the spinning methods of fiber filaments mainly include wet spinning, dry spinning, and electrospinning. Among them, wet spinning is the most commonly used method, which needs to be shaped in a coagulation bath (usually an organic solvent). There is no need for a coagulation bath in the dry spinning process, but the uniformity and strength of the obtained fiber filaments need to be improved. Electrospinning is simple to operate, but requires a special spinning device, and it is difficult to obtain separated single fibers, and the obtained fiber mat has low strength (J Biomed. Mater. Res., 2021, 109, 2065). Electrostatic self-assembly spinning is a method of preparing composite fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/02D01F8/18D01F1/10D01F1/09D01F1/07
CPCD01F8/02D01F8/18D01F1/10D01F1/103D01F1/09D01F1/07
Inventor 吴美燕李滨刘超于光刘哲轩崔球
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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