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Preparation method for electrostatic spinning nano-fiber adopting porous structure

A technology of electrospinning and porous structure, which is applied in fiber processing, rayon manufacturing, fiber chemical characteristics, etc., can solve the problems of waste of polymer materials, and achieve the effect of improving load and adsorption capacity and large specific surface area

Active Publication Date: 2014-02-19
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually, the nanofibers spun by electrospinning have a solid structure, and a large number of polymers or functional groups are inside the fibers, which is a waste of polymer materials.

Method used

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  • Preparation method for electrostatic spinning nano-fiber adopting porous structure
  • Preparation method for electrostatic spinning nano-fiber adopting porous structure
  • Preparation method for electrostatic spinning nano-fiber adopting porous structure

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] 1. Weigh 2 g of polyacrylonitrile into a 50 ml clean Erlenmeyer flask, add 20 ml of N,N-dimethylformamide, mix well and fully dissolve it as mother liquor. Then weigh different masses of Fe with a diameter of about 50nm 2 O 3 Nano particles, Fe 2 O 3 The mass ratio of the nanoparticles to polyacrylonitrile is 1-20:100, and the particles are uniformly dissolved by ultrasonic and sealed for later use.

[0031] figure 1 Fe used for 2 O 3 Nano particles, the diameter is about 50nm.

[0032] 2. Electrospinning conditions: needle inner diameter, 0.2~1 mm; distance between needle and receiving plate, 10~20 cm; voltage, 15~20 kV; solution flow, 0.5~2 ml / h; electrospinning time, 10~ 30 min.

[0033] image 3 , 4 Doped Fe in this example 2 O 3 The transmission electron microscope and scanning electron microscope photos of the fibers after the nanoparticles, from image 3 , 4 Fe can be clearly seen on the 2 O 3 Nano particles cover the surface of the fiber.

[0034] 3. The composite nan...

example 2

[0037] 1. Weigh 2 g of polylactic acid into a 50 ml clean Erlenmeyer flask, add 30 ml of chloroform, mix it evenly and fully dissolve it as mother liquor. Then weigh different masses of SiO with a diameter of about 40nm 2 Nano particles, SiO 2 The mass ratio of the nanoparticles to polyacrylonitrile is 1-20:100, and the particles are uniformly dissolved by ultrasonic and sealed for use.

[0038] Such as Figure 7 As shown, the SiO used 2 The diameter of the nanoparticles is around 40nm.

[0039] 2. Electrospinning conditions: needle inner diameter, 0.2~1 mm; distance between needle and receiving plate, 10~20 cm; voltage, 15~20 kV; solution flow, 0.5~2 ml / h; electrospinning time, 15~ 30 min.

[0040] Picture 8 Doped SiO for this example 2 Scanning electron micrograph of the fiber after the nanoparticles, from image 3 , 4 SiO can be clearly seen on the 2 Nano particles cover the surface of the fiber.

[0041] 3. The composite nanofibers are soaked in a diluted hydrofluoric acid aqueo...

example 3

[0044] 1. Weigh 2 g of polyacrylonitrile into a 50 ml clean Erlenmeyer flask, add 20 ml of N,N-dimethylformamide, mix well and fully dissolve it as mother liquor. Then weigh different masses of SiO with a diameter of about 40nm 2 Nano particles, SiO 2 The mass ratio of the nanoparticles to polyacrylonitrile is 1-20:100, and the particles are uniformly dissolved by ultrasonic and sealed for use.

[0045] 2. Electrospinning conditions: inner diameter of needle, 0.2~1 mm; distance between needle and receiving plate, 10~20 cm; voltage, 15~20 kV; solution flow, 0.5~2 ml / h; electrospinning time, 15~ 30 min.

[0046] 3. The composite nanofiber is soaked in concentrated NaOH solution (concentration 20%-60%) for 12-24 hours to remove the SiO doped into the nanofiber 2 Nanoparticles to obtain porous nanofibers.

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Abstract

The invention provides a preparation method for electrostatic spinning nano-fiber adopting a porous structure and belongs to the technical field of nano-fiber preparation. The method comprises the following steps: firstly, a polymer is dissolved in an organic solvent, then inorganic nanoparticles are added, and ultrasonic dispersion is performed, so that an electrostatic spinning solution is obtained; secondly, the electrostatic spinning solution is adopted for spinning on an electrostatic spinning device, so that composite nano-fiber of the nanoparticles and the polymer is obtained; finally, the composite nano-fiber of the nanoparticles and the polymer is soaked in a pore-forming liquid for removing the nanoparticles, and then drying is performed, so that the electrostatic spinning nano-fiber adopting the porous structure is obtained. Compared with the common electrostatic spinning fiber, the obtained porous nano-fiber has a larger specific surface area and active site, so that the load and adsorption capacity of the porous nano-fiber is improved, and the porous nano-fiber has high potential for use in technologies of material separation and concentration, catalyst carrier, medical biomaterials, ionic adsorption, wastewater treatment and the like.

Description

Technical field [0001] The invention belongs to the technical field of nanofiber preparation. Background technique [0002] Electrospinning technology is a spinning technology in which a higher viscosity non-Newtonian fluid is sprayed through a small aperture under a high-voltage electric field to form a polymer micro jet, and finally solidified into a fiber. [0003] The preparation of nanofiber materials by electrospinning technology is one of the most important academic and technical activities in the world of materials science and technology in the past ten years. Electrospinning has become one of the main ways to effectively prepare nanofiber materials due to its simple manufacturing equipment, low spinning cost, various spinnable materials, and controllable technology. Electrospinning technology has produced a rich variety of nanofibers, including organic, organic / inorganic composite and inorganic nanofibers. With the development of nanotechnology, electrospinning, as a sim...

Claims

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Application Information

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IPC IPC(8): D01F6/54D01F6/46D01F6/92D01F1/10D01F11/06D01F11/08D01D5/247
Inventor 陈铭刁国旺査斌彬张旺李伟任文吉
Owner YANGZHOU UNIV
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