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Preparation method for nanofiber porous membrane for carrying high-activity nanometal particles

A technology of nano-metal particles and nano-fibers, which is applied in the field of preparation of nano-fiber porous membranes, can solve problems such as difficulty in realizing high-capacity loading of nano-metal particles, difficulty in improving the density of active sites on the surface of fibers and surface activity, and achieve improved performance , improve the effect of activity

Active Publication Date: 2017-09-15
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In these two methods, due to the characteristics of the polymer molecular structure of nanofibers, it is difficult to increase the density and surface activity of the active sites on the surface of the fibers, which in turn limits the increase in the grafting density of the functional groups that can adsorb nano-metal particles. High Capacity Loading of Nano Metal Particles

Method used

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  • Preparation method for nanofiber porous membrane for carrying high-activity nanometal particles
  • Preparation method for nanofiber porous membrane for carrying high-activity nanometal particles
  • Preparation method for nanofiber porous membrane for carrying high-activity nanometal particles

Examples

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Embodiment 1

[0035] This embodiment discloses a preparation method of an ethylene vinyl alcohol copolymer nanofibrous porous membrane loaded with highly active nano-silver particles. The preparation method includes the following steps:

[0036] (1) The nanofiber suspension is coated on one surface of the nonwoven substrate by spraying, the coating thickness is 10 μm, and the coating density is 5 g / m 2 , vacuum-dried at room temperature, prepared figure 1The shown nanofiber porous base membrane consists of a nonwoven substrate and a nanofiber coating attached to its surface, in which the nanofiber suspension consists of ethylene vinyl alcohol copolymer nanofibers dispersed in the mass ratio of ethanol to deionized water It is prepared by stirring in a 1:1 mixed solvent, and the solid content of the nanofiber is 0.5wt%.

[0037] (2) Soak the nanofiber porous base membrane in ethanol to remove surface impurities, then put it into the prepared dopamine hydrochloride aqueous solution, and reac...

Embodiment 2

[0050] This example discloses a preparation method of an ethylene vinyl alcohol copolymer nanofibrous porous membrane loaded with highly active gold nanoparticles. The preparation method includes the following steps:

[0051] (1) The nanofiber suspension is coated on one surface of the nonwoven substrate by spraying, the coating thickness is 20 μm, and the coating density is 8 g / m 2 , vacuum-dried at room temperature, prepared figure 1 The shown nanofiber porous base membrane consists of a nonwoven substrate and a nanofiber coating attached to its surface, in which the nanofiber suspension consists of ethylene vinyl alcohol copolymer nanofibers dispersed in the mass ratio of ethanol to deionized water It is prepared by stirring in a 1:1 mixed solvent, and the solid content of the nanofiber is 2wt%.

[0052] (2) Soak the nanofiber porous base membrane in ethanol to remove surface impurities, then put it into the prepared dopamine hydrochloride aqueous solution, and react in a ...

Embodiment 3

[0065] This embodiment discloses a preparation method of an ethylene vinyl alcohol copolymer nanofibrous porous membrane loaded with highly active nano-platinum particles. The preparation method includes the following steps:

[0066] (1) The nanofiber suspension is coated on one surface of the nonwoven fabric substrate by spraying, the coating thickness is 50 μm, and the coating density is 12 g / m 2 , vacuum-dried at room temperature, prepared figure 1 The shown nanofiber porous base membrane consists of a nonwoven substrate and a nanofiber coating attached to its surface, in which the nanofiber suspension consists of ethylene vinyl alcohol copolymer nanofibers dispersed in the mass ratio of ethanol to deionized water It is formed by stirring in a 1:1 mixed solvent, and the solid content of the nanofiber is 5wt%.

[0067] (2) Soak the nanofiber porous base membrane in ethanol to remove surface impurities, then put it into the prepared dopamine hydrochloride aqueous solution, a...

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Abstract

The invention discloses a preparation method for a nanofiber porous membrane for carrying high-activity nanometal particles, which includes the following steps: a nanofiber membrane material with high specific surface area is adopted as a carrier material for carrying nanometal particles to be sequentially immersed in aqueous dopamine hydrochloride solution and aqueous polyethyleneimine solution to undergo modification, metal particles wrapped by sodium citrate stabilizer are then adsorbed, plasma is adopted for treatment, and finally, the nanofiber porous membrane for carrying high-activity nanometal particles is obtained. The advantages of the invention are as follows: the nanofiber porous membrane obtained by the preparation method is a flexible material, and therefore is easy to process; the activity of the porous membrane material is greatly increased; moreover, the morphology and size of nanometa particles can be controlled; the nanofiber porous membrane can carry nanometal particles with different performances; and the nanofiber porous membrane has potential application in fields, such as filtration, catalysis, bacteria resistance and surface-enhanced Raman. The whole process is green and pollution-free, so industrial popularization is easy.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a preparation method of a nanofiber porous membrane loaded with highly active nanometer metal particles. Background technique [0002] Nano-metal particles, especially precious metal nanoparticles such as gold, silver and platinum, have been widely used in catalytic degradation of environmental pollutants, antibacterial and sterilization, physical and chemical sensing, and surface-enhanced Raman-based sensing due to their ultra-small size and excellent electron-donating properties. In the fields of material detection and other fields, however, the shortcomings of nano metal particles, such as low yield, easy aggregation, and easy oxidation, affect their related physical and chemical properties and repeatability, which limits their application in various fields. For good applications, metal nanoparticles need to have controllable size and shape, uniform size distribu...

Claims

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Application Information

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IPC IPC(8): B01D69/02B01D71/60B01D67/00A01N59/16A01P1/00B01J23/50B01J23/52B01J23/42B01J35/06
CPCB01D67/0079B01D69/02B01D71/60A01N59/16B01J23/42B01J23/50B01J23/52B01J35/393B01J35/59B01J35/23
Inventor 刘轲王栋程盼汪元易志兵郭启浩鲁振坦刘琼珍李沐芳蒋海青
Owner WUHAN TEXTILE UNIV
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