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A method for preparing micro-nanofibrous membranes with core-shell structure by electrospinning with janus parallel needles

A technology of micro-nano fiber and core-shell structure, which is applied in electrospinning, fiber processing, textiles and papermaking, etc., can solve the problems of inability to prepare fibers with core-shell structure, and achieve easy cleaning and maintenance, simple process flow, and production low cost effect

Active Publication Date: 2021-07-16
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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  • A method for preparing micro-nanofibrous membranes with core-shell structure by electrospinning with janus parallel needles
  • A method for preparing micro-nanofibrous membranes with core-shell structure by electrospinning with janus parallel needles
  • A method for preparing micro-nanofibrous membranes with core-shell structure by electrospinning with janus parallel needles

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 micro-nano fiber membranes with a core-shell structure by electrospinning Janus parallel needles. The end section of the needles is composed of double channels, and the double channels in the front section are combined into a single channel, so as to achieve further mixing of the two solutions. The purpose of obtaining core-shell structure fibers. The electrospinning process includes the following steps: dissolve the polymer in a solvent and stir until it is completely dissolved, or heat and melt to obtain a spinning precursor; use a syringe to draw two different polymer solutions or melts and connect them to Janus parallel needles through latex tubes The dual-channel end of the high-voltage power supply is connected to the single-channel section of the Janus parallel needle, and the negative electrode is connected to the receiving device; the spinning parameters are set, the power is turned on, and the nanofiber membrane with the core-shell structure is obtained by spinning for a period of time. The preparation method of the present invention is simple, the core-shell structure is controllable, and the cost is low, and can be used in the fields of filtration adsorption, drug loading, tissue engineering support 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 Patents(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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