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Flat plate free liquid level coaxial electrostatic spinning method and device

A coaxial electrospinning, flat electrode technology, applied in textiles and papermaking, filament/thread forming, fiber processing, etc., can solve the problems of uneven electric field strength, inconvenient cleaning, low production efficiency, etc. Simple, uniform structure, uniform electric field effect

Inactive Publication Date: 2014-04-30
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the narrow and slender gap between the needles is easy to block the shell spinning solution, which is not convenient for the coating of the core layer by the shell spinning solution, and it is also not easy to clean
Secondly, the needle-plate electric field intensity between the composite needle and the receiving plate is not uniform, which is not conducive to the smooth progress of coaxial fiber coating and spinning
Finally, the pin-thrust coaxial spinneret is not convenient for mass production of coaxial fibers, and the production efficiency is low

Method used

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  • Flat plate free liquid level coaxial electrostatic spinning method and device

Examples

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Effect test

Embodiment 1

[0027] A flat free liquid surface coaxial electrospinning method, the shell layer spinning liquid polyethylene oxide solution (a certain amount of polyethylene oxide powder with a relative molecular mass of 600,000, dissolved in absolute ethanol and pure water The mixed solvent, whose volume ratio is 1:2, forms a homogeneous solution with a mass volume concentration of 2%) into the liquid storage tank (7) through the shell liquid supply pump (9) and ensures the liquid level of the shell solution (4 ) covers the needle tip of the core needle (5) under the action of surface tension to form a shell of the composite fiber; at the same time, the liquid level sensor (6) detects the height of the liquid level (4) of the shell solution and controls the supply of the shell The injection volume of the liquid pump (9); dissolve the core layer spinning liquid polyvinyl alcohol solution (a certain amount of polyvinyl alcohol powder with a relative , forming a homogeneous solution with a ma...

Embodiment 2

[0029]A flat free liquid surface coaxial electrospinning method, the shell spinning solution (a certain amount of polyvinyl alcohol powder with a relative molecular mass of 30,000-70,000, polyethylene oxide powder with a relative molecular mass of 600,000, According to the mass ratio of 10:1, it is dissolved in the mixed solvent of absolute ethanol and pure water, and its volume ratio is 1:2, forming a homogeneous solution with a mass volume concentration of 10%) injected through the shell liquid supply pump (9) In the liquid storage tank (7), ensure that the liquid level of the shell layer solution (4) covers the needle tip of the core needle (5) under the action of surface tension to form a shell layer of the composite fiber; at the same time, the liquid level sensor (6) detects The height of the liquid level (4) of the shell layer solution, and control the injection volume of the shell layer liquid supply pump (9); A homogeneous solution with a mass volume concentration of ...

Embodiment 3

[0031] A flat free liquid surface coaxial electrospinning method, the polystyrene solution of the shell spinning solution (a certain amount of polystyrene powder with a relative molecular weight of 350,000 is dissolved in tetrahydrofuran and N,N-dimethyl The mixed solvent of amide, whose volume ratio is 1:4, forms a homogeneous solution with a mass volume concentration of 25%) into the liquid storage tank (7) through the shell liquid supply pump (9) and ensures the liquid level of the shell solution ( 4) Cover the needle tip of the core needle (5) under the action of surface tension to form a shell of the composite fiber; at the same time, the liquid level sensor (6) detects the height of the liquid level (4) of the shell solution and controls the shell layer The injection rate of the liquid supply pump (9); the polyurethane solution of the core layer spinning solution (a certain amount of relative density 1.12g / m 3 Polyurethane particles, dissolved in N,N-dimethylamide to for...

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Abstract

The invention relates to a flat plate free liquid level coaxial electrostatic spinning method and device, in particular to an upwards spinning flat plate free liquid level coaxial electrostatic spinning method and device. The method includes the steps that shell spinning liquid is filled into a liquid storage tank, core spinning liquid is filled into core needles, and the two kinds of liquid combines at the tips of the core needles to form composite liquid drops, and the composite liquid drops are stretched and solidified on a receiving pole plate under the effect of high voltage electric fields to form ultrathin fiber felt of a core-shell structure. The method has the advantages that the effective coverage effect of the shell spinning liquid and the thickness of a shell can be adjusted according to the concentration and the viscosity of the shell spinning liquid, and therefore the requirement for preparing composite fibers of the specific core-shell structure is met. The upwards spinning flat plate free liquid level coaxial electrostatic spinning device is composed of the liquid storage tank, the core needles, a flat plate electrode, the receiving pole plate and a high voltage electrostatic generator and has the advantages that the device is easy to manufacture, the formed electric fields are uniform, and the multifunctional composite fibers of the more uniform structure can be massively prepared by increasing the number of the core needles and changing core liquid.

Description

technical field [0001] The invention belongs to the field of electrospinning technology, and relates to a flat free liquid surface coaxial electrostatic spinning method and a device thereof, in particular to a flat free liquid surface coaxial electrostatic spinning method and a device thereof for upward spraying. Background technique [0002] Coaxial electrospinning technology is currently one of the most direct and basic methods for preparing core-shell structural fibers. Due to the unique structure and function of the traditional single-component electrospun fibers, the fibers have been used in biological tissue scaffolds. , Drug release, catalytic carrier materials, gas storage, energy conversion, sensing and environmental protection, etc. have very broad application prospects and have received more and more attention. The spinneret system of the traditional coaxial electrospinning equipment is composed of two coaxial capillaries with different inner diameters. The spinni...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D5/34
Inventor 武会会郑元生谢胜孟晓华曾泳春
Owner DONGHUA UNIV
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