Filter material, and preparation method and application thereof

A filter material and substrate surface technology, applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve the problems of high binding fastness between filter material and catalyst, uniform distribution of catalyst, and good air permeability of integrated filter material, etc. , to achieve the effect of strong bonding fastness, small influence and high bonding fastness

Active Publication Date: 2021-10-08

NANJING FIBERGLASS RES & DESIGN INST CO LTD +1

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AI-Extracted Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the defects that the integrated filter material for denitrification and dust removal in the prior art cannot simultaneously ensure the high binding fas...

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Abstract

The invention belongs to the technical field of filter material preparation, and particularly relates to a filter material, and a preparation method and application thereof. The preparation method comprises the following steps: (1) dipping a filter material base material in a metal salt solution at 55-70 DEG C; (2) spraying a urea solution and/or an ammonia water solution on the surface of the impregnated filter material base material, and then spraying a hydrogen peroxide solution on the surface of the filter material base material; and (3) carrying out heat treatment to obtain the filter material. According to the denitration and dust removal integrated filter material obtained by the method, the catalyst can be uniformly distributed on the filter material base material while the high binding strength of the filter material base material and the catalyst can be ensured, and the air permeability of the filter material is not influenced by the existence of the catalyst.

Application Domain

Gas treatmentDispersed particle filtration +3

Technology Topic

Aqueous solutionFilter material +7

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Examples

Experimental program(4)
Comparison scheme(2)
Effect test(1)

Example Embodiment

[0045] Example 1

[0046] The present embodiment provides a method for producing a filter material, comprising the steps of,

[0047] (1) at 65 ℃, of the glass fiber base material is immersed in a metal salt solution, the immersion time of 1min; wherein the metal salt solution comprises a molar ratio of 11: 1: 4.5 titanyl sulfate, cerium nitrate and acetic acid Mn mass concentration of the metal salt solution is 15wt%.

[0048](2) The glass fiber substrate placed in an atmosphere of 65 deg.] C, spray volume successively on a surface of the glass fiber base concentration after immersion was 40% and the volume concentration of aqueous ammonia solution of 30% hydrogen peroxide solution, per square meter filter base gauge material, spraying aqueous ammonia solution was 220ml / m 2 , The amount of hydrogen peroxide solution was sprayed 160ml / m 2 After the end of spraying, drying the glass fiber base material was placed under 120 deg.] C, removing excess water and other liquids.

[0049] (3) The glass fiber base material heat treatment after drying was placed 20min at 300 ℃, the composite layer of PTFE emulsion was then sprayed on the surface thereof, 7min, expanded polytetrafluoroethylene microporous film sintered at 300 ℃ media obtained after thermocompression bonding coating. Wherein the emulsion comprises polytetrafluoroethylene composite mass ratio of 45: 15: 1.5: 1.5: 37 of PTFE dispersion, the fluorine-containing water repellent silane coupling agents, inorganic waterproofing agents and water, a spraying amount of the glass fiber-yl 4% by mass of the material; coating thermocompression bonding temperature of 345 ℃, pressure was 0.3MPa, the speed of 4m / min.

[0050] figure 1 Is a filter of the present embodiment topography embodiment, the catalyst can be seen from FIG uniformly distributed on the surface of filter substrate.

Example Embodiment

[0051] Example 2

[0052] The present embodiment provides a method for producing a filter material, comprising the steps of,

[0053] (1) at 60 ℃, the needle felt polyimide substrate was immersed in a metal salt solution, the immersion time was 1.5min; wherein the metal salt solution comprises a molar ratio of 11: 1: 4.5 oxysulfate titanium, and manganese acetate, cerium nitrate, the metal salt concentration of the solution was 10wt%.

[0054] (2) the substrate is then placed in a polyimide needle felt atmosphere of 70 deg.] C, followed by spray mass concentration on the surface of the polyimide substrate after impregnation needle felt urea aqueous solution and the volume concentration of 12 to 40% % hydrogen peroxide solution, the substrate as a spray amount per square meter of filter urea aqueous solution is 200ml / m 2 , The amount of hydrogen peroxide solution was sprayed 140ml / m 2 After the end of spraying, the substrate is a polyimide needle felt deg.] C oven dried under conditions of 120, to remove excess water and other liquids.

[0055] (3) a polyimide substrate after drying was placed needle felt heat 25min at 260 ℃, the composite layer of PTFE emulsion is then sprayed on its surface, sintered at 280 ℃ 10min, and PTFE ethylene expanded microporous membrane filter to obtain thermocompression bonding after coating. Wherein the emulsion comprises polytetrafluoroethylene composite mass ratio of 40: 15: 1: 2: 42 of PTFE dispersion, the fluorine-containing water repellent silane coupling agents, inorganic waterproofing agents and water, a spraying amount of polyimide 4wt% by mass of an amine base needled felt; coating thermocompression bonding temperature of 328 ℃, pressure of 0.45MPa, the vehicle speed is 5m / min.

Example Embodiment

[0056] Example 3

[0057] The present embodiment provides a method for producing a filter material, comprising the steps of,

[0058] (1) at 70 ℃, the glass fiber and polyimide composite needle felt substrate was immersed in a metal salt solution, the immersion time is 0.8 min; wherein the metal salt solution comprises a molar ratio of 11: 1: 4.5 titanyl sulfate, cerium nitrate, and manganese acetate, the metal salt solution has a concentration of 35wt%.

[0059] (2) The compound needle felt was then placed in 70 deg.] C in an atmosphere of a substrate, sequentially spray volume concentration needle felt surface of the composite substrate after dipping of 40% aqueous ammonia solution and the volume concentration of 40% hydrogen peroxide solution to per square meter filter substrate, the amount of ammonia solution was sprayed 320ml / m 2 , The amount of hydrogen peroxide solution was sprayed 270ml / m 2 After the end of spraying, drying the composite needle felt substrate was placed under 120 deg.] C, removing excess water and other liquids.

[0060] (3) After drying the composite heat-treated substrates were placed in needle felt 20min at 280 deg.] C, then sprayed on the surface layer of PTFE composite emulsion, sintered at 380 ℃ 5min, expanded polytetrafluoroethylene microstructure pore membrane filter to give after thermocompression bonding coating. Wherein the emulsion comprises polytetrafluoroethylene composite mass ratio of 50: 10: 1.5: 1.5: 37 of PTFE dispersion, the fluorine-containing water repellent silane coupling agents, inorganic waterproofing agents and water, a spraying amount of the composite needle 4wt% by mass of the base mat; coating thermocompression bonding temperature of 320 ℃, pressure was 0.5MPa, the vehicle speed is 10m / min.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Improve bonding fastness
Good wettability

Filter material, and preparation method and application thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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