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Method for preparing electrospun composite nanoscale fiber felt containing nanoscale palladium particles

A technology of composite nanofibers and nanofibers, applied in fiber types, fiber treatment, textiles and papermaking, etc., can solve problems such as high viscosity, achieve the effects of small particle size, uniform distribution, and simple preparation process

Inactive Publication Date: 2013-10-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its excessive viscosity, there is no report on pure PEI spinning

Method used

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  • Method for preparing electrospun composite nanoscale fiber felt containing nanoscale palladium particles
  • Method for preparing electrospun composite nanoscale fiber felt containing nanoscale palladium particles
  • Method for preparing electrospun composite nanoscale fiber felt containing nanoscale palladium particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Take 8.141g of PVA powder and slowly add it to 60ml of deionized water, stir slowly for about 30 minutes until the PVA is completely swollen, then place it on a magnetic stirrer and stir in a water bath at 80°C for 3 hours to prepare a 12% mass percent PVA aqueous solution. After cooling To be used; take 26.112mgK 2 PdCl 4 Dissolve in 20ml deionized water to prepare a 4mM light brown solution; take 15.148mgNaBH 4 Dissolve in 20ml deionized water and prepare a 20mM aqueous solution for use.

[0046] Weigh the PEI polyethyleneimine aqueous solution with a mass percentage concentration of 50% and the above-mentioned PVA aqueous solution to prepare a 10ml mixed solution with a total concentration of 12%, in which the mass ratio of PEI / PVA is 1:3; set spinning process conditions The flow rate is 0.3ml / h, the voltage is 18.6KV, and the receiving distance is 25cm. The prepared nanofibers are finally deposited on aluminum foil in the form of nanofiber mats. The fiber mats are dried...

Embodiment 2

[0051] Take 8.141g of PVA powder and slowly add it to 60ml of deionized water, stir slowly for about 30 minutes until the PVA is completely swollen, then place it on a magnetic stirrer and stir in a water bath at 80°C for 3 hours to prepare a 12% mass percent PVA aqueous solution. After cooling For use; take 13.056mgK 2 PdCl 4 Dissolve in 20ml deionized water to prepare 2mM light brown solution; take 25.246mgNaBH 4 Dissolve in 20ml deionized water and prepare a 12mM aqueous solution for use.

[0052] Weigh the PEI polyethyleneimine aqueous solution with a mass percentage concentration of 50% and the above-mentioned PVA aqueous solution to prepare a 10ml mixed solution with a total concentration of 8%, in which the mass ratio of PEI / PVA is 1:1; set the spinning process conditions The flow rate is 0.3ml / h, the voltage is 18.6KV, and the receiving distance is 25cm. The prepared nanofibers are finally deposited on aluminum foil in the form of nanofiber mats. The fiber mats are dried i...

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Abstract

The invention relates to a method for preparing an electrospun composite nanoscale fiber felt containing nanoscale palladium particles. The method comprises the following steps: (1) preparing mixed solution of polyvinyl alcohol and polyethylenimine, preparing a nanoscale fiber felt by electrospinning, crosslinking the nanoscale fiber felt with glutaraldehyde vapor for 18-20 hours in the vacuum state to obtain the electrospun nanoscale fiber felt insoluble in water and rinsing the electrospun nanoscale fiber felt with deionized water; and (2) preparing palladate solution and NaBH4 solution, soaking the hydrophobic electrospun nanoscale fiber felt in the palladate solution for 2-3 hours, then soaking the electrospun nanoscale fiber felt in the NaBH4 solution for 1-2 hours after rinsing the electrospun nanoscale fiber felt with deionized water and drying the electrospun nanoscale fiber felt after rinsing the electrospun nanoscale fiber felt with deionized water, thus obtaining the electrospun composite nanoscale fiber felt containing nanoscale palladium particles. The method has the following beneficial effects: the upload rate of the metal nanoparticles in the prepared fiber felt is high and the nanoparticles are uniformly distributed in the fiber, are free from agglomeration and are effectively fixed, thus avoiding causing secondary pollution to the water body in water environment restoration application.

Description

Technical field [0001] The invention belongs to the preparation field of nano-palladium particles, and particularly relates to a method for preparing an electrostatic spinning composite nano-fiber felt containing nano-palladium particles. Background technique [0002] In the past few decades, the methods to remove hexavalent chromium pollutants in industrial wastewater usually include physical, chemical and biological methods. It includes the addition of coagulants, reducing agents, ultrafiltration, electrochemical methods, adsorption, and fungal, microbial, and biomass technologies. Among them, adsorption is one of the most efficient and economical methods to remove pollutants. However, these methods have disadvantages such as poor recycling rate, difficult to recycle, and easy to cause secondary pollution. Therefore, searching for a sewage treatment material with a large specific surface area, recyclable, and no secondary pollution has become an urgent issue facing scientists....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/83D06M13/123D04H1/4309D04H1/4326D04H1/728D06M101/24D06M101/30
Inventor 史向阳黄云鹏沈明武
Owner DONGHUA UNIV
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