Preparation method of firmly-combined sandwich type purification material

A purifying material and firm combination technology, applied in chemical instruments and methods, separation methods, filtration and separation, etc., can solve the problems of low tensile strength and yield strength of electrospinning nanofibers and are not easy to filter materials, so as to improve filtration efficiency and improve filtration efficiency. The overall service life, the improvement of filtration efficiency, the effect of large specific surface area

Inactive Publication Date: 2013-07-10
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tensile strength of glass fiber is 10 times that of industrial filter cloth. After composite molding, the problem of low tensile strength and yield strength of electrospun nanofiber is not easy to be used as a filter material.

Method used

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  • Preparation method of firmly-combined sandwich type purification material
  • Preparation method of firmly-combined sandwich type purification material
  • Preparation method of firmly-combined sandwich type purification material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dissolve 5.2g of PA-6 in 34.8g of formic acid, seal it and use magnetic stirring for 12 hours to fully dissolve it, and prepare 13wt% PA-6 / formic acid spinning solution for use.

[0028] Set the temperature of the melt spinning device at 150°C. After the temperature stabilizes, add 0.3g of mLLDPE raw material and heat for 30 minutes to melt the mLLDPE in the barrel. Then add 0.1g of polyethylene wax and heat for 10 minutes. Spinning is carried out under the conditions of a wire voltage of 29kV and a receiving distance of 3cm, and industrial filter cloth is used to receive fibers.

[0029] Using a self-designed electrospinning device, under the conditions of a spinning voltage of 15kV and a receiving distance of 10cm, the PA-6 / formic acid spinning solution is electrospun, and the PA-6 nanofibers are electrospun into the industry loaded with mLLDPE fibers. on the filter cloth.

[0030] The industrial filter cloth collected with mLLDPE and PA-6 nanofibers was fully dried...

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Abstract

The invention discloses a novel preparation method of a firmly-combined sandwich type nano/submicron super-purification material. The preparation method disclosed by the invention comprises the following steps of: dissolving various natural or artificial polymers with melting points being higher than 175 DEG C by adopting appropriate solvents to prepare a polymer spinning solution with a certain concentration, electromagnetically stirring the polymer spinning solution for later use; cleaning and drying industrial filtering cloth, and electrically spinning various natural or artificial polymer fibers with melting points being lower than 175 DEG C to the industrial filtering cloth by adopting a fusion electrostatic spinning technology firstly; then electrically spinning the polymer spinning solution to the industrial filtering cloth of the natural or artificial polymer fibers with the melting points being lower than 175 DEG C via a solution electrostatic spinning technology; and hot pressing and forming the industrial filtering cloth with two fibers with glass fiber by adopting a hot pressing device, and preparing the sandwich type purification material.

Description

technical field [0001] The invention relates to a preparation method of a novel firmly combined sandwich type nano / submicron ultra-purification material. Background technique [0002] Nanofiber has been paid attention to as a filter material for a long time, because nanofiber has the characteristics that are very suitable as a filter material: small fiber diameter, large specific surface area, small pores, high porosity, and good pore permeability. Electrospinning is currently the most important and direct method for preparing nanofibers. The electrospun fibers not only have the above-mentioned characteristics that nanofibers are suitable for filter materials, but also have a three-dimensional network structure that can improve filtration efficiency and carrier The flow rate of the phase, thereby accelerating the filtration process. However, problems such as low electrospinning yield, insufficient fiber mechanical strength, short service life, surface modification and treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16
Inventor 刘太奇赵小龙
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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