Orientation groove micro/nano-fibres and preparation method for same

A nanofiber, groove technology, applied in fiber processing, filament/thread forming, single-component polystyrene rayon, etc., to achieve the effect of improving filtration efficiency, reducing filtration resistance, and large specific surface area

Inactive Publication Date: 2014-10-01
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still great difficulties in directly preparing aligned grooved nanofibers.

Method used

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  • Orientation groove micro/nano-fibres and preparation method for same
  • Orientation groove micro/nano-fibres and preparation method for same
  • Orientation groove micro/nano-fibres and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of preparation method of orientation groove micro / nanofiber concrete steps are as follows:

[0043] (1) The concentration of preparing different solvent ratios is 0.20g / mL polystyrene (M W ≈350,000g / mol) solution (the solvent is a mixed solvent of THF and DMF, the volume ratios of THF / DMF are: 5 / 1, 4 / 1, 3 / 1, 2 / 1), magnetically stirred for 12 hours to form a uniform solution After spinning separately;

[0044] (2) Add the spinning solution prepared in step 1 into the syringe, adjust the voltage to 12kV, the distance from the nozzle to the receiver is 15cm, the speed of the propulsion pump is 1.5mL / h, the relative humidity is 60%, and the temperature is 20°C. Turn on the electrospinning equipment, and the micro / nanofibers with orientation grooves can be obtained on the collection device;

[0045] (3) Observing the morphology of the micro / nanofibers prepared in step 2 with a scanning electron microscope. The obtained fiber has a single-groove structure, such as ...

Embodiment 2

[0047] A kind of preparation method of orientation groove micro / nanofiber concrete steps are as follows:

[0048] (1) The concentration of preparing different solvent ratios is 0.10g / mL polystyrene (M W ≈350,000g / mol) solution (the solvent is a mixed solvent of THF and DMF, the volume ratios of THF / DMF are: 5 / 1, 4 / 1, 3 / 1, 2 / 1), magnetically stirred for 12 hours to form a uniform solution After spinning separately;

[0049] (2) Add the spinning solution prepared in step 1 into the syringe, adjust the voltage to 12kV, the distance from the nozzle to the receiver is 15cm, the speed of the propulsion pump is 1.5mL / h, the relative humidity is 60%, and the temperature is 20°C. Turn on the electrospinning equipment, and the micro / nanofibers with orientation grooves can be obtained on the collection device;

[0050] (3) Observing the morphology of the micro / nanofibers prepared in step 2 with a scanning electron microscope. The obtained fiber has a beaded structure, such as image ...

Embodiment 3

[0052] A kind of preparation method of orientation groove micro / nanofiber concrete steps are as follows:

[0053] (1) Prepare the polystyrene (M W ≈350,000g / mol) solution (the solvent is a mixed solvent of THF and DMF, the volume ratio of THF / DMF is respectively: 1 / 1), magnetically stirred for 12 hours to form a uniform solution and then spun separately;

[0054] (2) Add the spinning solution prepared in step 1 into the syringe, adjust the voltage to 5kV or 12kV, the distance from the nozzle to the receiver is 15cm, the speed of the propulsion pump is 1.5mL / h, the relative humidity is 40% or 60%, and the temperature 20°C. Turn on the electrospinning equipment, and the micro / nanofibers with orientation grooves can be obtained on the collection device;

[0055] (3) Observing the morphology of the micro / nanofibers prepared in step 2 with a scanning electron microscope. When the relative humidity is 60% and the load voltage is 12kV, the obtained micro / nanofibers are multi-groov...

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Abstract

The invention discloses orientation groove micro / nano-fibres and a preparation method for the same. The orientation groove micro / nano-fibres comprise common groove micro / nano-fibres or beaded groove micro / nano-fibres, and the diameters of the fibres are 50 nanometres to 10 microns. The preparation method for the same comprises the following steps of: preparing polymer solution containing a high-volatility solvent and a low-volatility solvent, and preparing micro / nano-fibres by virtue of an electrospinning technique; preparing micro / nano-fibres with different groove structures, for example, different groove quantities, groove depths, groove distances and the like by adjusting process parameters of a solvent ratio, a solution concentration, a relative humidity and the like. The orientation groove micro / nano-fibres disclosed by the invention have the advantages of large specific surface area, high porosity and the like, and have a wide application prospect in the fields of superhydrophobicity, filter, tissue engineering and the like; the preparation method disclosed by the invention is capable of directly preparing the orientation groove micro / nano-fibres without the need of any aftertreatment process, simple to operate, stable in process, low in cost, and capable of realizing batch production.

Description

technical field [0001] The invention belongs to the field of electrospinning nanofibers and their preparation, and in particular relates to an orientation groove micro / nanofiber and a preparation method thereof. The fiber has broad application prospects in the fields of superhydrophobicity, filtration, oil absorption, tissue engineering and the like. Background technique [0002] Electrospinning non-woven technology is due to its wide range of spinning raw materials, low processing costs, and the various structures and excellent properties of nanofibers and fiber aggregates prepared by it (small fiber diameter, large specific surface area, high porosity, small pore size and good connectivity. , fiber continuous, etc.), wide range of applications and other characteristics have been widely concerned by scholars at home and abroad. Electrospun nanomaterials were first commercialized in the field of filtration, and have been widely used in drug controlled release, tissue enginee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/247D01D5/00D01F6/22
Inventor 刘万军黄晨靳向煜
Owner DONGHUA UNIV
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