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A flat pinhole coaxial electrospinning fiber composite spinneret and spinning method thereof

A technology of coaxial electrospinning and fiber compounding, which is applied in fiber processing, textile and papermaking, filament/thread forming, etc. Uniformity and other problems, to achieve the effect of easy detection, maintenance and cleaning, low equipment cost, and uniform electric field

Inactive Publication Date: 2016-06-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electric field formed by needle-thrust-needle coaxial composite nozzle is not uniform, the shell layer is easy to cover unevenly or clogged, and it is not easy to mass-produce coaxial fibers

Method used

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  • A flat pinhole coaxial electrospinning fiber composite spinneret and spinning method thereof
  • A flat pinhole coaxial electrospinning fiber composite spinneret and spinning method thereof
  • A flat pinhole coaxial electrospinning fiber composite spinneret and spinning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of spinning method of flat pinhole coaxial electrospinning fiber composite spinneret, shell layer spinning liquid polyethylene oxide solution (a certain amount of relative molecular mass is 600,000 polyethylene oxide powder , dissolved in anhydrous ethanol and pure water mixed solvent, its volume ratio is 1:2, forming a homogeneous solution with a mass volume concentration of 2%) injected from the shell infusion channel (2) and filled with the solution cavity, and flow out from the through hole (4.2) to form the sheath of the composite fiber; the core layer spinning liquid polyvinyl alcohol solution (a certain amount of polyvinyl alcohol powder with a relative molecular mass of 146,000-186,000 , collagen is dissolved in pure water at a mass ratio of 1:1 to form a homogeneous solution with a mass volume concentration of 15%) injected from the core needle (1) to form the core layer of the composite fiber; the core shell layer The spinning solution merges in the gro...

Embodiment 2

[0038] A kind of spinning method of flat pinhole coaxial electrospinning fiber composite spinneret, shell layer spinning solution (with a certain amount of relative molecular mass being 30,000-70,000 polyvinyl alcohol powder, relative molecular mass 600,000 polyethylene oxide powder, according to the mass ratio of 10:1, dissolved in the mixed solvent of absolute ethanol and pure water, and its volume ratio is 1:2, forming a homogeneous mixture with a mass volume concentration of 10%. Solution) is injected from the shell layer infusion channel (2) and filled with the solution cavity all the time, and flows out from the through hole (4.2) to form the shell layer of the composite fiber; the core layer spinning solution polyethylene oxide solution (dissolving the dialyzed silk fibroin in pure water to form a homogeneous solution with a mass volume concentration of 50%) is injected from the core needle (1) to form the core layer of the composite fiber; the core layer and the shell l...

Embodiment 3

[0040] A kind of spinning method of flat pinhole coaxial electrospinning fiber composite spinneret, shell layer spinning liquid polystyrene solution (a certain amount of relative molecular mass is 350,000 polystyrene powder, dissolved in tetrahydrofuran and N,N-dimethylamide mixed solvent, the volume ratio of which is 1:4, forming a homogeneous solution with a mass volume concentration of 25%) injected from the shell infusion channel (2) and filled with the solution cavity, and flow out from the through hole (4.2) to form the sheath of composite fiber; 3 Polyurethane particles, dissolved in N,N-dimethylamide to form a homogeneous solution with a mass volume concentration of 8%) are injected from the core needle (1) to form the core layer of the composite fiber; the core layer and the shell layer are spun The silk liquid merges in the groove of the through hole to form composite droplets; a high-voltage direct current electric field is applied on the conductive electrode (3), a...

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Abstract

The invention relates to a flat pinhole coaxial electrospinning fiber composite spinneret and its spinning method, including: (1) a coaxial fiber composite spinneret configured by a flat conductive electrode, an auxiliary spinneret and a core needle There is a through hole on the auxiliary spinneret plate, and a groove is provided on the thread outlet surface of the through hole. The advantage is that a uniform electric field is formed between the flat conductive electrode and the receiving plate, which is more conducive to the formation of coaxial fibers and mass production. Production. (2) After the core layer and the shell layer spinning solution are injected separately, they merge into composite droplets in the groove of the through hole; by properly adjusting the voltage and spinning distance, the composite droplets reach the destination through high-frequency stretching, bending and swinging under the force of the electric field. The sheet is received and cured to form a core-shell structure of ultrafine composite electrospun fibers. The advantage is that the preparation of the coaxial composite needle is simple, and it is convenient for batch preparation of the coaxial fiber composite needle, and the multifunctional composite fiber meeting various demands can be prepared by changing the core needle.

Description

technical field [0001] The invention relates to a flat pinhole coaxial electrospinning fiber composite spinneret and its spinning method, in particular to a flat pinhole coaxial electrospinning nozzle suitable for the production of large quantities of coaxial fibers and multifunctional composite fibers. Spinning fiber composite spinneret and spinning method thereof. Background technique [0002] Traditional electrospinning equipment uses a single capillary spinneret to spin, so it is usually used to prepare solid and smooth single-component nanofibers. The coaxial electrospun fiber divides the solution of the core layer and the shell material into two different syringes, and the spinneret system consists of two coaxial capillaries with different inner diameters. Under the action of a high-voltage electric field, the outer liquid After flowing out, it joins with the nuclear layer liquid. Due to the short confluence time, combined with the low diffusion coefficient of the po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D01D5/34
Inventor 武会会曾泳春
Owner DONGHUA UNIV
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