Method for preparing catalyst-supported composite nano-fiber non-woven fabric

A technology of composite nanofibers and supported catalysts, which is applied in fiber processing, non-woven fabrics, textiles, and papermaking, etc., can solve the problems of complicated preparation process, and achieve the effects of simple process, improved utilization rate, and high firmness.

Inactive Publication Date: 2018-03-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can significantly improve the filtration accuracy and the efficiency of denitrification and dioxin removal, the preparation process is relatively complicated

Method used

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  • Method for preparing catalyst-supported composite nano-fiber non-woven fabric

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add solvent DMAc to the polym-phenylene isophthalamide PMIA solution with a concentration of 16wt% and an inherent viscosity of 1.83dL / g, heat to 50°C and stir for 6h to dilute, and let stand at room temperature 24h to remove air bubbles to obtain a PMIA spinning solution with a concentration of 10wt%.

[0037] (2) MnO x Catalyst nanoparticles were added into absolute ethanol, and ultrasonically dispersed to obtain a catalyst particle dispersion with a concentration of 0.05 wt%.

[0038] (3) inject the PMIA spinning solution that step (1) obtains into jet spinning device (the spinneret aperture is 0.4~0.5mm, and the air gap width is 0.4~0.5mm), the catalyst particle dispersion that step (2) obtains Inject the spraying device (nozzle diameter is 0.6~1.0mm), connect high-pressure gas, regulate the single-hole extrusion flow of PMIA solution in the jet spinning device to be 1.2mL / h, the air pressure of the jet spinning device is 0.1MPa, and the ambient temperature is ...

Embodiment 2

[0041] (1) Add solvent DMAc to the polym-phenylene isophthalamide PMIA solution with a concentration of 15.5wt% and an inherent viscosity of 1.95dL / g, heat to 50°C and stir for 6h to dilute, and statically Leave it for 24 hours to remove air bubbles to obtain a PMIA spinning solution with a concentration of 12 wt%.

[0042] (2) MnO x / TiO 2 The catalyst nanoparticles were added into anhydrous acetone, and dispersed ultrasonically to obtain a catalyst particle dispersion with a concentration of 0.08 wt%.

[0043] (3) inject the PMIA spinning solution that step (1) obtains into jet spinning device (the spinneret aperture is 0.4~0.5mm, and the air gap width is 0.4~0.5mm), the catalyst particle dispersion that step (2) obtains Inject the spraying device (nozzle diameter is 0.6~1.0mm), connect high-pressure gas, regulate the single-hole extrusion flow of PMIA solution in the jet spinning device to be 1.0mL / h, the air pressure of the jet spinning device is 0.12MPa, and the ambient...

Embodiment 3

[0046] (1) Add solvent DMAc to the polym-phenylene isophthalamide PMIA solution with a concentration of 16wt% and an inherent viscosity of 2.0dL / g, heat to 50°C and stir for 6h to dilute, and let stand at room temperature 24h to remove air bubbles to obtain a PMIA spinning solution with a concentration of 13wt%.

[0047] (2) MnO x The catalyst nanoparticles were added into isopropanol and dispersed ultrasonically to obtain a catalyst particle dispersion with a concentration of 0.15 wt%.

[0048] (3) inject the PMIA spinning solution that step (1) obtains into jet spinning device (the spinneret aperture is 0.4~0.5mm, and the air gap width is 0.4~0.5mm), the catalyst particle dispersion that step (2) obtains Inject spraying device (nozzle diameter is 0.6~1.0mm), connect high-pressure gas, regulate the single hole extrusion flow rate of PMIA solution in jet spinning device to be 1.2mL / h, the air pressure of jet spinning device is 0.12MPa, ambient temperature is 65°C; adjust the...

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Abstract

The invention relates to a method for preparing a catalyst-supported composite nano-fiber non-woven fabric. The method comprises the following steps: adding a solvent into a PMIA (Polyisophthaloyl Metaphenylene Diamine) solution for diluting, and removing bubbles to obtain a PMIA spinning solution; adding a micro/nano level denitration catalyst into a volatile solvent, and performing ultrasonic dispersion to obtain catalyst particle dispersion; injecting the PMIA spinning solution into a jet spinning device, injecting the catalyst particle dispersion into a spraying device, synchronously performing jet spinning on the PMIA spinning solution and spraying on the catalyst particle dispersion, and performing vacuum drying, thereby obtaining the product. The method disclosed by the invention issimple in process procedures and favorable for continuous industrial production. According to the method disclosed by the invention, catalyst particles are firmly sealed inside the nano-fiber non-woven fabric and can be used for a long time; and moreover, the composite nano-fiber non-woven fabric has high breathability, the utilization rate of the catalyst is greatly improved, and high precisionfiltration and synchronous denitration of coal-fired flue gas can be realized.

Description

technical field [0001] The invention belongs to the technical field of composite nanofiber nonwoven fabrics, in particular to a method for preparing catalyst-loaded composite nanofiber nonwoven fabrics. Background technique [0002] At present, the overall deterioration of my country's environmental conditions has not been fundamentally curbed. The combustion of coal and other fossil fuels, municipal waste incineration and other high-temperature industries emit a large amount of nitrogen oxides, volatile organic compounds, dust, etc., which have become the main sources of PM2.5 in my country. Nowadays, bag-type dust removal devices are mostly used for dust removal of industrial flue gas. The meso-aramid PMIA fiber is widely used to make high-temperature dust removal bags because of its excellent textile processability, good high temperature resistance, and chemical resistance. It is used for high-temperature industrial smoke. Gas dust removal and filtration. However, the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/009D01D5/00
Inventor 于俊荣王彦胡祖明诸静
Owner DONGHUA UNIV
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