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Preparation method of organic nano porous fiber film having controllable ultra-high specific area

A technology with ultra-high specific surface area and nano-porosity, which is applied to artificial filaments made of cellulose derivatives, fiber treatment, and single-component polystyrene artificial filaments. Solve problems such as cumbersome process to achieve the effect of meeting application requirements, simple production method and high production efficiency

Inactive Publication Date: 2011-01-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is cumbersome, and the post-treatment process is difficult to completely remove the excess components, which seriously affects the fiber performance and is difficult to apply in practice
In addition, some researchers use highly volatile solvents for spinning, and adjust the volatilization rate of the solvent by adding a non-solvent phase to prepare nanoporous fiber membranes, but obtain nanoporous fiber membranes with pores only on the surface of the fibers.
[0004] The Chinese patent with the publication number CN2921043Y relates to a fiber with nanopores, and does not disclose its preparation method and the specific surface area of ​​the fiber; U.S. Patent No. US6790528B2 discloses a method for preparing a nanoporous fiber membrane, which uses a single solvent set However, the nanoporous fibers with different surface morphologies are obtained, but the nanopores only exist on the surface of the fibers, and the interior of the fibers is not a porous structure, and the specific surface area of ​​the fiber membrane is not adjustable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The first step, at room temperature, the polystyrene of 5wt% (molecular weight 350kg / mol) is joined in the airtight vessel that fills N, N dimethylformamide solvent, is placed on the magnetic stirrer, stirs with 200rpm, Dissolve the polymer to obtain a polymer solution with uniform properties;

[0021] In the second step, at room temperature and with a humidity of 40%, the polymer solution prepared in the first step is placed in a closed syringe and spun on an electrospinning device, and the voltage applied during the electrospinning is 20 k volts, the receiving distance is 10 cm, and the perfusion speed of the mediation solution is 10 ml / hour to obtain an organic nanoporous fiber membrane with an ultra-high specific surface area. There are holes inside and outside, and there are holes between the fibers, and the specific surface area is 108.6m 2 / g.

Embodiment 2

[0023] The first step, at room temperature, the polystyrene of 10wt% (molecular weight 350kg / mol) is joined in the airtight vessel that fills N, N dimethylformamide and tetrahydrofuran mixed solvent (weight ratio 5 / 1), put Stir at 100rpm on a magnetic stirrer to dissolve the polymer and obtain a polymer solution with uniform properties;

[0024] In the second step, at room temperature and with a humidity of 40%, the polymer solution prepared in the first step is placed in a closed syringe and spun on an electrospinning device, and the voltage applied during the electrospinning is 20 k Volts, the receiving distance is 15 cm, the perfusion speed of the mediation solution is 2 ml / hour, and an organic nanoporous fiber membrane with an ultra-high specific surface area is obtained. The diameter of the fiber is 200 nm-1 micron, and the pore size is 1 nm-150 nm. There are holes inside and outside, and there are holes between the fibers, and the specific surface area is 60.8m 2 / g.

Embodiment 3

[0026] The first step, at room temperature, the polystyrene of 20wt% (molecular weight 208kg / mol) is joined in the airtight vessel that fills N, N dimethylformamide, is placed on the magnetic stirrer, stirs with 100rpm, dissolves polymer to obtain a polymer solution with uniform properties;

[0027] In the second step, at room temperature and with a humidity of 70%, the polymer solution prepared in the first step is placed in a closed syringe and spun on an electrospinning device. The voltage applied during electrospinning is 5 k Volts, the receiving distance is 15 cm, the perfusion speed of the mediation solution is 2 ml / hour, and an organic nanoporous fiber membrane with an ultra-high specific surface area is obtained. The diameter of the fiber is 500 nm-2 microns, and the pore size is 1 nm-150 nm. There are holes inside and outside, and there are holes between the fibers, and the specific surface area is 58.8m 2 / g.

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Abstract

The invention provides a preparation method of an organic nano porous fiber film having a controllable ultra-high specific area, which is characterized by comprising the following steps: 1. adding hydrophobic polymer to a closed vessel filled with a solvent at room temperature, placing onto a magnetic stirring apparatus, and stirring at a rotation speed of 10-200rpm to dissolve the polymer so as to obtain a macromolecular solution having uniform properties; and 2. putting the macromolecular solution prepared in Step 1 into a closed injector under the condition of room temperature and 25-75% in humidity, and spinning on electrostatic spinning equipment to obtain the organic nano porous fiber film having a controllable ultra-high specific area. By using the method, the organic nano porous fiber film having an ultra-high specific area can be obtained.

Description

technical field [0001] The invention relates to a method for preparing an organic nanoporous fiber membrane with a controllable ultrahigh specific surface area, and belongs to the field of nanomaterial preparation. Background technique [0002] In recent years, electrospinning technology, as a simple and effective method for preparing fibers with diameters ranging from hundreds of nanometers to several microns, has attracted more and more attention, and has attracted extensive attention from researchers from all over the world. So far, nearly a hundred kinds of polymers have been used to prepare electrospun nanofibrous membranes by solution or melt spinning. In the past 10 years, electrospun nanofiber membranes have been applied in the fields of filtration membranes, reaction catalyst supports, ultra-high sensitivity biosensors, biological tissue engineering, dye-sensitized solar cells, etc., and the application performance increases with the specific surface area of ​​the f...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D5/247D01F6/22D01F6/62D01F2/28D01F6/78D01F6/16D01F6/64D01F6/10D01F6/18D01F6/84D01F6/74
Inventor 丁彬林金友俞建勇杨建茂孙刚
Owner DONGHUA UNIV
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