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 f

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

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

Example Embodiment

[0027] Example 2

[0028] 9.9 ml of 12% polyethylene glycol aqueous solution is used as the fiber-forming polymer solution, 0.1 ml of 5% polystyrene benzene solution is used as the dispersion liquid, and 0.3 g of sodium dodecyl sulfonate is used as the surfactant. Stir to obtain a stable emulsion. The electrospinning parameters are 15kV, the advancing rate is 0.1ml / h, and the receiving distance is 15cm. After spinning, it was washed with toluene to remove polystyrene to obtain polyethylene glycol porous fiber.

Example Embodiment

[0029] Example 3

[0030] 9 ml of 8% polyvinylpyrrolidone aqueous solution is used as a fiber-forming polymer solution, a mixture of chloroform and dichloroethane (or one or more of polycaprolactone, polylactic acid or polymethyl acrylate) 3% solution) 1 ml is a dispersion liquid, and 0.3 g of sodium dodecylbenzene sulfonate is used as a surfactant, and a stable emulsion is obtained after vigorous stirring. The electrospinning parameters are 15kV, the advancing rate is 0.3 ml / h, and the receiving distance is 15 cm. After spinning and drying at 100°C, porous nanofibers of polyvinylpyrrolidone are obtained.

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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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