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Method for preparing filter material by utilizing nanometer spraying of carbon paste

A filter material and carbon slurry technology, which is applied in the field of filter materials to achieve the effect of improved filtration efficiency and high specific surface area

Inactive Publication Date: 2017-09-08
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of method that utilizes carbon slurry nano-spraying to prepare filter material, this method solves the fixation problem of the spun fiber on filter material surface, simultaneously because the high specific surface area of ​​spraying particle helps the adsorption of impurity, makes Filtration efficiency has also been improved

Method used

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  • Method for preparing filter material by utilizing nanometer spraying of carbon paste
  • Method for preparing filter material by utilizing nanometer spraying of carbon paste

Examples

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Effect test

example 1

[0040] Example 1. First prepare a PS / DMF solution with a PS mass fraction of 20%, adjust the voltage to 15Kv through an electrospinning device, the receiving distance is 10cm, and the needle diameter is 0.7mm, and the industrial filter cloth is spun for 5 minutes. Prepare a polyurethane-based carbon slurry with a carbon black mass fraction of 9%, stir it evenly, and put it in a glass vessel with a nozzle whose diameter is 0.7mm;

[0041] Using the self-made electrostatic spraying device, the receiving distance is 7cm, the adjustment voltage is 20Kv, and the industrial filter cloth spun with PS fibers is sprayed for 10 minutes;

[0042] Then carry out cold rolling treatment through a self-made roller device to obtain the desired filter material.

[0043] In addition, due to the slightly low concentration of carbon paste, the solvent cannot be completely volatilized during the spraying process, and the receiving distance and voltage should be adjusted accordingly to ensure the v...

example 2

[0044] Example 2. First prepare a PS / DMF solution with a PS mass fraction of 20%, adjust the voltage to 15Kv through an electrospinning device, the receiving distance is 10cm, and the needle diameter is 0.7mm, and the industrial filter cloth is spun for 5 minutes. Prepare a polyurethane-based carbon slurry with a carbon black mass fraction of 15%, stir it evenly, and put it in a glass vessel with a nozzle whose diameter is 0.7mm;

[0045] Using the self-made electrostatic spraying device, the receiving distance is 7cm, the adjustment voltage is 20Kv, and the industrial filter cloth spun with PS fibers is sprayed for 10 minutes;

[0046] The required filter material can be obtained by cold-rolling the self-made roller device.

[0047] At this time, the carbon slurry spraying conditions are suitable, forming a stable spray, and the average diameter of the sprayed particles is 2 μm, such as figure 2 Shown is the SEM schematic diagram of the filter material prepared by the examp...

example 3

[0048] Example 3. First prepare a PS / DMF solution with a PS mass fraction of 20%, adjust the voltage to 15Kv through an electrospinning device, the receiving distance is 10cm, and the needle diameter is 0.7mm, and the industrial filter cloth is spun for 5 minutes. The preparation carbon black mass fraction is the polyurethane base carbon slurry of 21%, stirs evenly, it is contained in the glass vessel with nozzle, and nozzle diameter is 0.7mm;

[0049] Using the self-made electrostatic spraying device, the receiving distance is 7cm, the adjustment voltage is 20Kv, and the industrial filter cloth spun with PS fibers is sprayed for 10 minutes;

[0050] The required filter material can be obtained by cold-rolling the self-made roller device.

[0051] At this time, because the concentration of the carbon slurry is too high and the diameter of the nozzle is too small, the nozzle is easily blocked during the spraying process. The diameter of the nozzle can be adjusted to ensure the ...

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Abstract

The invention discloses a method for preparing a filter material by utilizing nanometer spraying of carbon paste. The method comprises the following steps: firstly, preparing macromolecular carbon paste solution of corresponding concentration according to needs; adding the prepared macromolecular carbon paste solution into glass ware with a sprayer, and placing on an electrostatic spraying device; adjusting the distance between the sprayer and industrial filter cloth woven with fibers, and regulating voltage of the electrostatic spraying device to enable the macromolecular carbon paste solution to be evenly sprayed onto the industrial filter cloth under action of high voltage static; and performing cold rolling treatment on the sprayed industrial filter cloth through a roller device to obtain the required filter material. According to the method, the fixation problem of the fibers woven on the surface of the filter material is solved; meanwhile, due to high specific surface area of sprayed particles, impurity adsorption is facilitated, so that filter efficiency is also increased.

Description

technical field [0001] The invention relates to the technical field of filter materials, in particular to a method for preparing filter materials by nano-spraying of carbon slurry. Background technique [0002] Electrospinning technology was first proposed by American Formhals in 1934, and it is now very mature and has become an important method for preparing nanometer and submicron materials. Its principle is that under the synergistic effect of electric field force and surface tension, the polymer droplets first generate a "Taylor cone", and then generate a jet. During the running process to the receiving plate, the droplets are split and stretched, and the solvent is volatilized. , and finally the fibers are deposited on the receiving plate. When the concentration of the spinning solution is appropriate, the effect of electrostatic spraying can be formed instead of forming fiber filaments. [0003] Electrospun fibers have excellent morphological structure, which makes th...

Claims

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Application Information

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IPC IPC(8): B01D39/16
CPCB01D39/16B01D2239/10
Inventor 刘太奇张旗郑玄之
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY