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Solution spray type thermosetting electrospun composite membrane and preparation method and application thereof

A technology of electrospinning and composite film, which is applied in the direction of electrospinning, filament forming treatment, filament/thread forming, etc. It can solve the problems affecting the stability of material film formation, fiber re-melting, fiber sticking, etc., to achieve The effect of controlling microscopic morphology, high water flux, and uniform distribution

Inactive Publication Date: 2019-11-01
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no shape control measure on the receiving device for fiber deposition, that is, the most important forming and stabilizing device for fibers. In this way, the incomplete volatilization of the solvent will easily lead to the re-melting of the fibers and the sticking between the fibers, which will affect the formation of the material. membrane stability

Method used

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  • Solution spray type thermosetting electrospun composite membrane and preparation method and application thereof
  • Solution spray type thermosetting electrospun composite membrane and preparation method and application thereof
  • Solution spray type thermosetting electrospun composite membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of preparation of electrospun composite film of melt-spray type thermosetting forming, concrete steps are:

[0035] 1) Dissolve 1.8g of polyacrylonitrile in 15mL of acetone / N,N-dimethylacetamide (DMAc) mixture, wherein the volume ratio of acetone to DMAc is 2:3, and place the mixed solution in a 60°C water bath Constant temperature magnetic stirring was carried out for 2.5 h until a uniform transparent polymer solution was obtained.

[0036] 2) After obtaining a uniform transparent polymer solution, weigh 0.18 g of finely ground silicon dioxide powder and add it into the polymer solution, and continue ultrasonic stirring at 60° C. for 30 min.

[0037] 3) After stirring, let stand for defoaming for 30 minutes and introduce it into the syringe to start electrospinning. The parameters of electrospinning are: receiving distance 15cm, voltage 14kV, relative humidity 45%, liquid feeding speed 2.5mL / h, receiving panel The temperature was controlled at 50°C, and the spi...

Embodiment 2

[0040] A kind of preparation of electrospun composite film of melt-spray type thermosetting forming, concrete steps are:

[0041] 1) Weigh 5.04g of polyethersulfone and dissolve it in 20mL of ethanol / chloroform mixture, wherein the volume ratio of ethanol to chloroform is 1:9, and stir the mixed solution in a water bath at 50°C for 2.0h until the obtained Homogeneous transparent polymer solution.

[0042] 2) After obtaining a uniform transparent polymer solution, weigh 0.52 g of finely ground titanium dioxide powder and add it into the polymer solution, and continue ultrasonic stirring at 50° C. for 30 min.

[0043] 3) After stirring, let stand for defoaming for 30 minutes, and then introduce it into the syringe to start electrospinning. The spinning parameters are set as: receiving distance 10cm, voltage 15kV, relative humidity 45%, liquid feeding speed 1mL / h, receiving panel temperature The temperature is controlled at 60°C, and after spinning, it is left at room temperatur...

Embodiment 3

[0045] A kind of preparation of electrospun composite film of melt-spray type thermosetting forming, concrete steps are:

[0046] 1) Dissolve 0.85g and 1.8g of cellulose acetate (CA) in 10mL of acetone / N,N-dimethylacetamide (DMAc) mixture, wherein the volume ratio of acetone to DMAc is 1:1, and The mixed solution was magnetically stirred in a water bath at 60° C. for 2.5 hours until a uniform transparent polymer solution was obtained.

[0047]2) After obtaining a uniform transparent polymer solution, weigh 0.0042 g and 0.023 g of finely ground activated carbon powder and add them to the polymer solution, respectively, and continue ultrasonic stirring at 60° C. for 30 min.

[0048] 3) After the stirring is completed, let stand for defoaming for 30 minutes, and then introduce them into the injection cylinder respectively to obtain electrospinning solution a and electrospinning solution b.

[0049] 4) Firstly, the electrospinning spinning liquid b was spun, and the spinning para...

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Abstract

The invention belongs to the technical field of functional membrane materials, and particularly relates to a preparation method of a solution spray type thermosetting electrospun composite membrane. Apolymer, inorganic nanoparticles and an organic solvent are prepared into a spinning solution, and the membrane is formed by electrostatic spraying. By changing the proportion of the polymer to the solvent and the proportion of the inorganic nanoparticles to the polymer, the temperature of a receiving panel is adjusted so as to control the solid-liquid phase separation speed of membrane materials, and the regulation and control over the microstructure of the composite membrane are achieved. In the electrospinning process, the composite fibrous membrane can be directly woven; a mesh membrane is formed through melting-collapse and re-jointing of the fibrous membrane; or the membrane materials are sprayed out in the form of droplets to form the membrane, and the above two or three forms canbe combined. According to the prepared composite membrane, different polymers and inorganic nanoparticles can be replaced, and the prepared composite membrane has the advantages that the nanoparticlesare uniformly distributed, the specific surface area is large and the porosity is high; moreover, the prepared composite membrane has adsorption capacity and has a good application prospect in gas filtration and water treatment.

Description

technical field [0001] The invention belongs to the technical field of functional membrane materials, and specifically relates to functional membrane materials for pretreatment of dyes and macromolecular proteins and separation and filtration of micro-nano particles, in particular to a melt-spray thermosetting electrospun composite membrane and its preparation method and application . Background technique [0002] Membrane materials in the prior art usually adopt processes such as coating, crosslinking, and carbonization to form a film, but the process is complex, the controllability of porosity adjustment is poor, there are many influencing factors in the film forming process, and the film formation rate is low. [0003] Electrospinning technology uses thousands or even tens of thousands of volts of high-voltage static electricity to generate an electrostatic field. When the polymer droplet is charged, it will form a Taylor cone under the action of the electric field force....

Claims

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Application Information

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IPC IPC(8): D04H3/033D04H3/016D04H3/007D04H3/009D04H3/011D01D1/06D01D1/10D01D5/00D01F6/38D01F6/94D01F2/28D01F1/10
CPCD01D1/065D01D1/103D01D5/003D01D5/0076D01D5/0092D01F1/10D01F2/28D01F6/38D01F6/94D04H3/007D04H3/009D04H3/011D04H3/016D04H3/033D10B2505/04
Inventor 赵晓燕黄晨张帅汪称意
Owner CHANGZHOU UNIV
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