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Method for preparing micro-nano fiber membrane withcore-shell structurethrough electrostatic spinning by Janus parallel needle

A technology of micro-nano fiber and electrospinning, which is applied in electrospinning, fiber processing, textiles and papermaking, etc., can solve the problem of inability to prepare fibers with core-shell mechanism, and achieve easy cleaning and maintenance, wide application prospects, production low cost effect

Active Publication Date: 2019-10-29
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fibers with two polymer materials arranged side by side are usually obtained by Janus needle spinning, and fibers with a core-shell mechanism cannot be prepared.

Method used

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  • Method for preparing micro-nano fiber membrane withcore-shell structurethrough electrostatic spinning by Janus parallel needle
  • Method for preparing micro-nano fiber membrane withcore-shell structurethrough electrostatic spinning by Janus parallel needle
  • Method for preparing micro-nano fiber membrane withcore-shell structurethrough electrostatic spinning by Janus parallel needle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A1. Weigh 1-10g of lithium chloride and put it into beaker 1, then add 1-10g of dimethylacetamide. Stir on a magnetic stirrer for 2 hours to obtain a clear and uniform co-solvent; add cellulose powder to the well-mixed co-solvent, put the beaker 1 in an oil bath at 90°C and stir for 72 hours to get a well-mixed fiber prime solution;

[0029] A2. Measure 1-10 mL of acetone and add it to beaker 2, then add 1-10 mL of dimethylformamide. Stir on a magnetic stirrer for 2 hours to obtain a clear and uniform co-solvent; add 1 to 10 g of solid polyvinylidene fluoride to the uniformly mixed co-solvent, put the beaker 2 in an oil bath at 60°C and stir for 1 hour, A clear and homogeneous polyvinylidene fluoride solution is obtained;

[0030] B. Measure 2mL-3mL of the solution in beaker 1 in step A1, and inject the solution into syringe 1; measure 4mL-5mL of the solution in beaker 2 in step A2, and inject the solution into syringe 2; The two syringes are respectively fixed on di...

Embodiment 2

[0033] A1. Weigh 1-10g of lithium chloride and put it into beaker 1, then add 1-10g of dimethylacetamide. Stir on a magnetic stirrer for 2 hours to obtain a clear and uniform co-solvent; add cellulose powder to the well-mixed co-solvent, put the beaker 1 in an oil bath at 90°C and stir for 72 hours to get a well-mixed fiber prime solution;

[0034] A2. Measure 1-10 mL of acetone and add it to beaker 2, then add 1-10 mL of dimethylformamide. Stir on a magnetic stirrer for 2 hours to obtain a clear and uniform co-solvent; add 1 to 10 g of solid polyvinylidene fluoride to the uniformly mixed co-solvent, put the beaker 2 in an oil bath at 60°C and stir for 1 hour, A clear and homogeneous polyvinylidene fluoride solution is obtained;

[0035] B. Measure 2mL-3mL of the solution in beaker 1 in step A1, and inject the solution into syringe 1; measure 4mL-5mL of the solution in beaker 2 in step A2, and inject the solution into syringe 2; The two syringes are respectively fixed on di...

Embodiment 3

[0038] A1. Weigh 1-10g of lithium chloride and put it into beaker 1, then add 1-10g of dimethylacetamide. Stir on a magnetic stirrer for 2 hours to obtain a clear and uniform co-solvent; add cellulose powder to the well-mixed co-solvent, put the beaker 1 in an oil bath at 90°C and stir for 72 hours to get a well-mixed fiber prime solution;

[0039] A2. Measure 1-10 mL of acetone and add it to beaker 2, then add 1-10 mL of dimethylformamide. Stir on a magnetic stirrer for 2 hours to obtain a clear and uniform co-solvent; add 1 to 10 g of solid polyvinylidene fluoride to the uniformly mixed co-solvent, put the beaker 2 in an oil bath at 60°C and stir for 1 hour, A clear and homogeneous polyvinylidene fluoride solution is obtained;

[0040] B. Measure 2mL-3mL of the solution in beaker 1 in step A1, and inject the solution into syringe 1; measure 4mL-5mL of the solution in beaker 2 in step A2, and inject the solution into syringe 2; The two syringes are respectively fixed on di...

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Abstract

The invention relates to a method for preparing a micro-nano fiber membrane with a core-shell structure through electrostatic spinning by a Janus parallel needle. The tail section of the needle comprises double channels, the double channels at the front section are combined to form a single channel, and therefore, two solutions are mixed for further preparation ofthe fiber with the core-shell structure. The electrostatic spinning process comprises following steps: macromolecules are dissolved in a solvent and stirred until the macromolecules are completely dissolved, or the macromolecules areheat to be molten, and spinning precursor solutions are obtained; two different macromolecule solutions or melts are extracted by injectors respectively and connected to the double channel ends of theJanus parallel needle through latex tubes; a positive pole of a high-voltage power supply is connected to the single channel section of the Janus parallel needle, and a negative pole is connected toa receiving device; spinning parameters are set, the power supply is switched on, the spinning is performed for a period of time, and the micro-nano fiber membrane with the core-shell structure is obtained. The preparation method is simple, the core-shell structure is controllable, the cost is lower, and the membrane can be applied to the fields of filtration and adsorption, drug loading, tissue engineering scaffolds and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrospinning micro-nano fibers, in particular to a method for preparing micro-nano electrospun fibers with a core-shell structure by electrospinning, in particular to a method for preparing micro-nano electrospun fibers with a core-shell structure by electrospinning with Janus parallel needles. A method for shell-structured micro-nanofibrous membranes. Background technique [0002] Polymer materials have been developed rapidly in recent years due to their wide range of sources and the characteristics of green and environmental protection. Their molecular weight range is large, there are various types, and they have various properties, which can meet the needs of different occasions. In order to make better use of polymer materials, scientists try to change the properties of materials by controlling the microstructure of materials, so as to obtain polymer materials with new functions. El...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D5/34
CPCD01D5/003D01D5/0069D01D5/34
Inventor 侯甲子周贵宾王怡欢王玉停张万喜金波
Owner JILIN UNIV
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