Preparation method of heatable sandwich type purification material

A purifying material, sandwich technology, applied in chemical instruments and methods, separation methods, filtration and separation, etc., can solve the problems of low strength, weak bonding of base cloth, large pressure drop of composite filter materials, etc., and achieve high tensile strength. , The fiber diameter is small, and the effect of improving the filtration efficiency

Inactive Publication Date: 2015-10-21
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of a heatable sandwich-type purification material, which can prepare a sandwich-type purification material with a stable structure, high filtration efficiency, heating, and firm bonding in a relatively simple manner, thereby solving the problem of The existing method of preparation is the problem of large pressure drop, low strength and weak combination with the base cloth of the composite filter material

Method used

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  • Preparation method of heatable sandwich type purification material

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preparation example Construction

[0013] An embodiment of the present invention provides a method for preparing a heatable sandwich-type purification material, the method comprising:

[0014] Add cross-linking agent A to the conductive carbon paste and apply it to the glass fiber mesh cloth, and then cross-link and solidify to form a heating net;

[0015] Electrospun polymer nanofibers onto industrial filter cloth to make filter base cloth;

[0016] Add cross-linking agent B to the insulating slurry and apply it on the heating net, press the heating net coated with the insulating slurry and the filter base cloth together, and obtain a sandwich-type purification material that can be heated after cross-linking and curing.

[0017] In the above method, the conductive carbon paste is: using methyl vinyl silicone rubber raw rubber, conductive carbon black and solvent A as raw materials, and mixing them by mechanical stirring to make a conductive carbon paste with uniform dispersion of carbon black;

[0018] The in...

Embodiment 1

[0030] Example 1 Weigh 25g of methyl vinyl silicone rubber raw rubber (M=600000, vinyl content 0.15mol%), put it into a three-necked flask, add 100g of xylene to it, set up a stirring device and a reflux device , start stirring at 60°C, and add xylene from time to time. After the raw methyl vinyl silicone rubber is dissolved, add 7.5g of carbon black in proportion to the three-necked flask, continue stirring, and add 80g of xylene, and wait for the solution After uniformity, stop the reaction and let it stand for cooling to make PTC carbon slurry, then add a certain amount of benzoyl peroxide (BPO) to the carbon slurry, mix it evenly, and apply it to the mesh by dipping On the glass fiber mesh cloth with a size of 10×10mm, through drying at room temperature and vacuum drying at 150°C, the raw methyl vinyl silicone rubber in the carbon slurry is cross-linked to produce a heating net with evenly distributed carbon slurry.

Embodiment 2

[0031] Example 2 Dissolve 5.2g of PA-6 in 34.8g of formic acid. After sealing, use magnetic stirring for 12 hours to fully dissolve it, configure it into a 13wt% PA-6 / formic acid solution, and use a self-designed electrospinning device to spin Under the conditions of voltage 15kV and receiving distance of 10cm, PA-6 nanofibers were electrospun onto washed industrial filter cloth to make filter base cloth, and the industrial filter cloth collected with PA-6 nanofibers was fully dried. The SEM image of the industrial filter cloth with PA-6 nanofibers collected is shown in Figure 1. It can be seen from the figure that the PA-6 nanofibers are evenly distributed on the industrial filter cloth, and the average diameter is 80nm.

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Abstract

The invention discloses a preparation method of a heatable sandwich type purification material, belonging to the field of preparation of purification materials. The method comprises the following steps: adding a cross-linking agent A into conductive carbon paste, coating on glass fiber gridding cloth, and cross-linking and solidifying to prepare a heating net; electrospinning polymer nanofibers to industrial filter cloth to prepare filter base cloth; adding a cross-linking agent B into insulated paste liquid, coating on the heating net, pressing the heating net coated with the insulated paste liquid and the filter base cloth together, and cross-linking and solidifying to obtain the heatable sandwich type purification material. The nanofibers obtained by adopting the method have the diameter of 50-250nm and are good in shape and uniform in thickness; the filter base cloth is well bonded with the heating net; the sandwich type purification material is very high in filtering efficiency under the heating condition and has wide application prospect in air purification.

Description

technical field [0001] The invention relates to the field of preparation of purification materials, in particular to a preparation method of a heatable sandwich type 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, there are many problems in the electrospun nanofiber material itself, which hinder its large-scale ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/04
Inventor 刘太奇赵小龙高宁
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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