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Preparation method of preparing Janus structure nano-fiber through single-axis electrostatic spinning

A technology of electrospinning and nanofibers, which is applied in fiber processing, textile and papermaking, filament/thread forming, etc., to achieve the effects of wide practicability, simple preparation and convenient operation

Active Publication Date: 2019-05-21
JILIN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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At present, there is no report on the preparation of Janus

Method used

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  • Preparation method of preparing Janus structure nano-fiber through single-axis electrostatic spinning
  • Preparation method of preparing Janus structure nano-fiber through single-axis electrostatic spinning

Examples

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Embodiment 1

[0033] The embodiment of the present invention provides a method for preparing a Janus structure nanofiber membrane by uniaxial electrospinning technology. The specific operation steps include: jointly dissolving PVP and PCL in N, N-dimethyl In the formamide and chloroform solvents, the mass fraction of PVP is 4.5 wt%, and the mass fraction of PCL is 4.5 wt%, and magnetically stirred for a period of time until dissolved, and the layers are separated after standing.

[0034] Add the spinning solution obtained above into the propulsion syringe, and control the electrospinning parameters such as voltage and propulsion speed. After the solution in the syringe is stratified, electrospinning is carried out, and the electrospinning is continued and stable for a period of time to obtain a complete single Nanofibrous membranes with root Janus structures. The specific operating parameters of electrospinning are: the spinning voltage is 17kV, the distance from the spinneret to the receiv...

Embodiment 2

[0036] The embodiment of the present invention provides a method for preparing a Janus structure nanofiber membrane by uniaxial electrospinning technology. The specific operation steps include: jointly dissolving PVP and PCL in N, N-dimethyl In the formamide and chloroform solvents, the mass fraction of PVP is 1.8 wt%, and the mass fraction of PCL is 9.1 wt%, and magnetically stirred for a period of time until dissolved, and the layers are separated after standing.

[0037] Add the spinning solution obtained above into the propulsion syringe, and control the electrospinning parameters such as voltage and propulsion speed. After the solution in the syringe is stratified, electrospinning is carried out, and the electrospinning is continued and stable for a period of time to obtain a complete single Nanofibrous membranes with root Janus structures. The specific operating parameters of electrospinning are: the spinning voltage is 17kV, the distance from the spinneret to the receiv...

Embodiment 3

[0039] The embodiment of the present invention provides a method for preparing a Janus structure nanofiber membrane by uniaxial electrospinning technology, and the specific operation steps include: jointly dissolving 6.8wt% PVP and 2.3wt% PCL in N with a mass ratio of 1:4 , in N-dimethylformamide and chloroform solvents, the mass fraction of PVP is 6.8wt%, and the mass fraction of PCL is 2.3wt%. Stir magnetically for a period of time until dissolved, and stand to separate into layers.

[0040] Add the spinning solution obtained above into the propulsion syringe, and control the electrospinning parameters such as voltage and propulsion speed. After the solution in the syringe is stratified, electrospinning is carried out, and the electrospinning is continued and stable for a period of time to obtain a complete single Nanofibrous membranes with root Janus structures. The specific operating parameters of electrospinning are: the spinning voltage is 17kV, the distance from the spi...

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Abstract

The invention relates to a preparation method of preparing Janus structure nano-fiber through single-axis electrostatic spinning, and belongs to the technical field of nano-material preparation. By adopting the electrostatic spinning technology, a spinning solution prepared by a hydrophilic polymer and a hydrophobic polymer is added into a single-channel injector, and by controlling the varietiesand contents of the hydrophilic and hydrophobic polymers, a Janus nano-fiber membrane with controllable polymer characteristic distribution can be prepared. In order to prepare the single-axis electrostatic spinning Janus nano-fiber membrane, selection and mixing of hydrophilic and hydrophobic polymers and organic solvents and content control are designed, the solution separation phenomenon is utilized, different functional substances can be added, and the Janus nano-fiber membrane with different functions is prepared. The involved instrument and equipment are simple, experiment operation is easy, the peppered Janus nano-fiber membrane is flexible, the polymer distribution is controllable, and the Janus nano-fiber membrane has different functions and is high in applicability.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a preparation method for preparing Janus structure nanofibers by uniaxial electrospinning. Background technique [0002] Janus materials refer to two chemical compositions or one chemical composition but different structures, which have a clear partition structure in the same system, and have dual properties such as hydrophilic / hydrophobic, polar / nonpolar, etc. It is an important research direction of material science. At present, there are very few methods for preparing Janus nanofiber membranes by electrospinning technology. One method is to use two parallel spinning spinnerets to prepare Janus nanofibers. The prepared Janus nanofibers are composed of two nanofibers with different chemical compositions side by side, and the two fibers are partially overlapped. This method is not easy to prepare Janus fibers because two parallel working fluids usually repel and...

Claims

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Application Information

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IPC IPC(8): D04H1/728D04H1/4382D01D5/00
Inventor 程志强李芮杨桂霞刘文丛康立娟于晓斌
Owner JILIN AGRICULTURAL UNIV
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