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Preparation method of epoxidized lignin modified polyacrylonitrile filter material

A polyacrylonitrile and filter material technology, applied in chemical instruments and methods, separation methods, filtration separation and other directions, can solve the problems of uneven air permeability, large filtration resistance, and reduced filtration efficiency, and achieve simple preparation steps and filtration efficiency. High, high dust holding capacity

Inactive Publication Date: 2016-10-12
佛山市顺德品维源无纺布有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: the filter material made of basalt fiber has poor toughness and poor wear resistance, but the blending of basalt fiber and high-performance fiber will result in reduced filtration efficiency, uneven air permeability, and high filtration resistance problem, the present invention first extracts corn stalk lignin from corn stalks, and then mixes it with hydrochloric acid, glacial acetic acid, epichlorohydrin and other substances to react to obtain epoxidized lignin, and dissolves epoxidized lignin In dimethylformamide, and mixed with polyacrylonitrile solution, heating and crosslinking reaction, the reaction solution is concentrated to obtain spinning solution, and finally it is electrospun to prepare epoxidized lignin modified poly Acrylonitrile filter material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First, weigh 500g of corn stalks, put them into a cutting machine and cut them into 4cm long straw sections, crush the straw sections, and sieve to get 100 mesh straw powder, according to the solid-liquid ratio of 1:2, add the straw powder to toluene-ethanolamine Mixed solution with a ratio of 1:2, stirred for 15 minutes, put it in an oil bath, extracted at 120°C for 30 hours, filtered the filter residue after extraction, put it in an oven, and dried it at 80°C for 6 hours to obtain a dried product; According to the solid-liquid ratio of 1:3, mix the above-mentioned dry matter with a mass fraction of 10% hydrochloric acid solution, soak at room temperature for 5 hours and then suction filter to obtain a filter residue, rinse with deionized water, and then press the solid-liquid ratio of 1:4 and mass fraction Mix 20% sodium hydroxide solution, soak at 60°C for 2 hours, cool to room temperature after soaking, adjust the pH value to 9.0 with a mass fraction of 35% sulfuric ...

example 2

[0021]First, weigh 300g of corn stalks, put them into a cutting machine and cut them into 2cm long straw sections, crush the straw sections and sieve to get 80 mesh straw powder, according to the solid-liquid ratio of 1:2, add the straw powder to toluene-ethanolamine Mixed solution with a ratio of 1:2, stirred for 10 minutes, put it in an oil bath, leached at 90°C for 25 hours, filtered the filter residue after leaching, put it in an oven, and dried it at 60°C for 5 hours to obtain a dried product; According to the solid-liquid ratio of 1:3, mix the above-mentioned dry matter with a mass fraction of 10% hydrochloric acid solution, soak at room temperature for 3 hours, and then filter with suction to obtain a filter residue, rinse with deionized water, and then press the solid-liquid ratio of 1:4 and mass fraction Mix 20% sodium hydroxide solution, soak at 50°C for 1 hour, cool to room temperature after soaking, adjust the pH value to 8.0 with a mass fraction of 35% sulfuric aci...

example 3

[0024] First, weigh 400g of corn stalks, put them into a cutting machine and cut them into 3cm straw sections, crush and sieve the straw sections to get 90 mesh straw powder, according to the solid-liquid ratio of 1:2, add the straw powder to toluene-ethanolamine by volume Mixed solution with a ratio of 1:2, stirred for 12 minutes, put it in an oil bath, extracted at 100°C for 27 hours, filtered the filter residue after extraction, put it in an oven, and dried it at 70°C for 5 hours to obtain a dried product; According to the solid-to-liquid ratio of 1:3, mix the above-mentioned dry matter with a mass fraction of 10% hydrochloric acid solution, soak at room temperature for 4 hours, and then filter with suction to obtain a filter residue, rinse with deionized water, and then press the solid-to-liquid ratio of 1:4 and mass fraction Mix 20% sodium hydroxide solution, soak at 55°C for 1 hour, cool to room temperature after soaking, adjust the pH value to 8.5 with a mass fraction of...

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Abstract

The invention relates to a preparation method of an epoxidized lignin modified polyacrylonitrile filter material and belongs to the technical field of material preparation. According to the preparation method, firstly, corn stalk lignin is extracted from corn stalks and is mixed with hydrochloric acid, glacial acetic acid, epoxy chloropropane and other substances for a reaction, epoxidized lignin is obtained, the epoxidized lignin is dissolved in dimethylformamide and mixed with a polyacrylonitrile solution, the mixture is heated and subjected to a cross-linking reaction, a reaction liquid is concentrated, a spinning solution is obtained, finally, the spinning solution is subjected to electrostatic spinning, and the epoxidized lignin modified polyacrylonitrile filter material can be prepared. The prepared epoxidized lignin modified polyacrylonitrile filter material has high filtering efficiency, the filtering efficiency of PM 2.5 in air reaches 99.7% or above, the dust holding capacity is high and reaches 485.8-635.6 g.m<-2>, the strength is higher, and the stiffness is 550-620 mg.

Description

technical field [0001] The invention relates to a preparation method of an epoxidized lignin modified polyacrylonitrile filter material, belonging to the technical field of material preparation. Background technique [0002] Filtration is an operation that captures particulate matter dispersed in gas or liquid, and is a heterogeneous separation of matter. Filtration is accomplished through the matching of filter media and filter equipment. Manufacturers call filter media filter material products, which are an important part of industrial textiles. Through filtration, it plays an important role in controlling pollution, protecting the atmospheric environment, ensuring product quality, improving product technical precision, recycling valuable raw materials and reducing costs in industrial production. [0003] At present, most of the filter materials used in air purification materials are made of basalt fiber. Basalt fiber is an inorganic fiber, which has the advantages of non...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/02D01F8/08D01C1/00D01D5/00B01D39/04B01D46/30
CPCB01D39/04B01D46/30D01C1/00D01D5/003D01F8/02D01F8/08
Inventor 袁春华薛培龙王统军
Owner 佛山市顺德品维源无纺布有限公司
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