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Coaxial spinning method for preparing hollow molecular sieve fiber possessing grade structure

A spinning technology and a technology of hierarchical structure, applied in the field of preparation of molecular sieve fibers

Inactive Publication Date: 2009-10-07
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many materials used for coaxial electrospinning, but there is no report on the preparation of hollow molecular sieve fibers by this method

Method used

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  • Coaxial spinning method for preparing hollow molecular sieve fiber possessing grade structure
  • Coaxial spinning method for preparing hollow molecular sieve fiber possessing grade structure
  • Coaxial spinning method for preparing hollow molecular sieve fiber possessing grade structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The ethanol solution of molecular sieve nanoparticles silicalite-1 / polyvinylpyrrolidone (PVP) is used as the outer fluid, and liquid paraffin is used as the inner fluid:

[0053] The synthesis of Silicalite-1 (skeleton type is MFI) nanoparticles was described in the literature Microporous Mesoporous Mater., 1999, 31, 141-150. The synthesized particles are repeatedly centrifuged, dispersed and washed until the pH value is between 7 and 9, the particle diameter is about 100nm, and the pore size of the molecular sieve is 0.55nm.

[0054] Add 0.8 g of washed molecular sieve nanoparticles to 8 g of absolute ethanol, and after 5 hours of ultrasonic dispersion, stir with a magnetic stirrer for 24 hours, then add 1.0 g of polyvinylpyrrolidone (PVP), and continue stirring for 4 hours to obtain a uniform Take 2mL of this solution and put it into the plastic outer nozzle of the electrospinning equipment as the outer fluid; use liquid paraffin as the inner fluid, and send the inner...

Embodiment 2

[0058] The ethanol solution of molecular sieve nanoparticles silicalite-1 / polyvinylpyrrolidone (PVP) is used as the outer fluid, and liquid paraffin is used as the inner fluid:

[0059] The synthesis of Silicalite-1 (skeleton type is MFI) nanoparticles was described in the literature Microporous Mesoporous Mater.1999, 31, 141-150. The synthesized particles are repeatedly centrifuged, dispersed and washed until the pH value is between 7 and 9, the particle diameter is about 100nm, and the pore size of the molecular sieve is 0.55nm.

[0060] Add 0.8 g of washed molecular sieve nanoparticles to 8 g of absolute ethanol, and after 5 hours of ultrasonic dispersion, stir with a magnetic stirrer for 24 hours, then add 1.0 g of polyvinylpyrrolidone (PVP), and continue stirring for 4 hours to obtain a uniform Take 2mL of this solution and put it into the plastic outer spray tube as the outer fluid. With liquid paraffin as the internal fluid, the internal fluid is sent to the inner spra...

Embodiment 3

[0064] The ethanol solution of molecular sieve nanoparticles silicalite-1 / polyvinylpyrrolidone (PVP) is used as the outer fluid, and liquid paraffin is used as the inner fluid:

[0065] The synthesis of Silicalite-1 (skeleton type is MFI) nanoparticles was described in the literature Microporous Mesoporous Mater., 1999, 31, 141-150. The synthesized particles are repeatedly centrifuged, dispersed and washed until the pH value is between 7 and 9, the particle diameter is about 100nm, and the pore size of the molecular sieve is 0.55nm.

[0066] Add 0.8 g of washed molecular sieve nanoparticles to 8 g of absolute ethanol, and after 5 hours of ultrasonic dispersion, stir with a magnetic stirrer for 24 hours, then add 1.0 g of polyvinylpyrrolidone (PVP), and continue stirring for 4 hours to obtain a uniform Take 2mL of this solution and put it into the plastic outer spray tube as the outer fluid. With liquid paraffin as the internal fluid, the internal fluid is sent to the inner sp...

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Abstract

The invention belongs to the preparation technology of molecular sieve fibers, in particular to a method of preparing hollow molecular sieve fibers having micropores (less than 2nm), mesopores (2-50nm) and macropores (greater than 50nm) hierarchical structure by coaxial spinning technology method. Nano-sized molecular sieve particles are used as the skeleton element, the polymer material is used as the binder, and the fluid in the organic molecule is used as the template, and the electrospinning is carried out under the action of a high-voltage electrostatic field. This method is applicable to molecular sieve nanoparticles of various skeleton types and spinnable polymer materials. The inner diameter of the hollow fiber can be effectively controlled by simply changing the flow rate of the inner fluid; by changing the type of molecular sieve nanoparticles, the molecular sieve fiber can be widely used. It is used in macromolecular catalysis, optics, chemical sensing and other fields. Compared with conventional methods, the method has the advantages of convenience, quickness, low cost and low consumption, and is beneficial to large-scale preparation of hollow molecular sieve fibers.

Description

technical field [0001] The invention belongs to the preparation technology of molecular sieve fibers, and in particular relates to a hollow molecular sieve fiber with micropore (less than 2nm), mesopore (2-50nm) and macropore (greater than 50nm) grade structure prepared by coaxial spinning technology method. technical background [0002] Because zeolite molecular sieves have highly regular and oriented cages and uniform pores of nanometer size, large internal surface area (acidic or basic, hydrophobic or hydrophilic), it has great potential in ion exchange, adsorption, shape selection, catalysis and host-guest assembly. It has wide application in chemistry and so on. However, the low diffusion rate of guest molecules, especially organic macromolecules, in the nanoscale pores of molecular sieves seriously limits the practical application of molecular sieves. Therefore, the preparation of molecular sieves with microporous, mesoporous and macroporous hierarchical structures h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08D01D5/00
Inventor 于吉红邸建城王晓方徐如人
Owner JILIN UNIV
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