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Preparation method of porous nano fiber

A nanofiber, a single technology, applied in the field of porous nanofiber preparation, can solve the problem that the specific surface area of ​​the fiber is not very obvious, and achieve the effect of good pore making effect, simple operation, and large specific surface area

Inactive Publication Date: 2012-06-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the pores prepared by phase separation usually only exist on the surface of the fiber, so the effect on increasing the specific surface area of ​​the fiber is not very obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Concentration of 8% polyvinyl alcohol aqueous solution 8 ml as fiber-forming polymer solution, 5% polystyrene toluene solution 2 ml as dispersion liquid, and 0.3 g sodium dodecylbenzene sulfonate as surfactant, after vigorous stirring A stable emulsion was obtained. The electrospinning parameters were 15 kV, the propulsion rate was 0.3 ml / hour, and the receiving distance was 20 cm. After spinning, polystyrene is washed with chloroform to obtain polyvinyl alcohol porous fibers.

Embodiment 2

[0028] 9.9 ml of 12% polyethylene glycol aqueous solution was used as the fiber-forming polymer solution, 0.1 ml of 5% polystyrene benzene solution was used as the dispersion liquid, and 0.3 g of sodium dodecylsulfonate was used as the surfactant. Stir to obtain a stable emulsion. The electrospinning parameters were 15 kV, the propulsion rate was 0.1 ml / hour, and the receiving distance was 15 cm. After spinning, wash with toluene to remove polystyrene, and obtain polyethylene glycol porous fibers.

Embodiment 3

[0030] Concentration is 9 milliliters of aqueous solution of polyvinylpyrrolidone of 8% as fiber-forming polymer solution, chloroform and dichloroethane mixture (or containing one or more kinds of polycaprolactone, polylactic acid or polymethyl acrylate 3% solution) 1 milliliter is the dispersion liquid, and 0.3 gram of sodium dodecylbenzenesulfonate is used as a surfactant, and a stable emulsion is obtained through vigorous stirring. The electrospinning parameters were 15 kV, the propulsion rate was 0.3 ml / hour, and the receiving distance was 15 cm. The polyvinylpyrrolidone porous nanofibers were obtained after spinning and drying at 100°C.

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Abstract

The invention relates to a preparation method of porous nano fiber. The preparation method comprises the steps of: dissolving polymer for electrostatic spinning in a solvent to obtain a fiber-forming polymer solution; then adding a dispersion insoluble in the solvent, adding a surfactant, and stirring to obtain an emulsion; and carrying out electrostatic spinning on the emulsion, and volatilizing the dispersion during the spinning process or washing off the dispersion in the spinning process and the subsequent washing process to obtain the porous nano fiber. According to the invention, the preparation method is simple to operate, low in cost, and is suitable for mass production; the pore forming effect is good; and the obtained porous nano fiber has larger specific area and an irregular pore structure.

Description

technical field [0001] The invention belongs to the field of preparation of nanofibers, in particular to a preparation method of porous nanofibers. Background technique [0002] As a new type of material in recent years, nanofiber has received extensive attention in various fields. Electrospinning is currently one of the most effective methods for preparing nanofibers. The commonly obtained electrospun nanofibers can reach nanoscale in diameter, have a high specific surface area, and have a continuous shape, while the fibers are in an irregularly packed structure and can be used for filtration and other purposes. [0003] Although electrospun nanofibers have a high specific surface area, compared with inorganic mesoporous materials or other porous materials, the specific surface area is still small, so it is limited in areas such as catalyst supports, pollutant adsorption, etc., and is too smooth. Fibers are also less supportive of cell growth than porous structures when u...

Claims

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Application Information

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IPC IPC(8): D01F1/08D01F11/00D01F6/50D01F6/94D01F6/56D01F6/92D01F11/06D01F11/08D01D1/02D01D5/00
Inventor 俞昊朱树琦宁晨曦毛梦烨傅武兴朱美芳
Owner DONGHUA UNIV
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