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Method for preparing micro-pore composite nanofiber membrane by electrostatic spinning and application

A composite nanofiber and electrospinning technology, which is applied in the direction of synthetic fiber, fiber type, fiber treatment, etc., can solve the problems of small proportion of functional effect components, general compatibility with polymers, etc., and achieve good carbon dioxide adsorption performance, adsorption The effect of good performance and large adsorption performance

Active Publication Date: 2020-01-03
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance is improved compared with pure electrospun fibers, on the one hand, graphene itself is a traditional porous material, and its compatibility with polymers is general; on the other hand, its functional effect has a small proportion of components, so it is still There is a lot of room for improvement

Method used

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  • Method for preparing micro-pore composite nanofiber membrane by electrostatic spinning and application
  • Method for preparing micro-pore composite nanofiber membrane by electrostatic spinning and application
  • Method for preparing micro-pore composite nanofiber membrane by electrostatic spinning and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing a microporous composite nanofiber membrane, specifically comprising the steps of:

[0041] 1. Synthesis of macroinitiators

[0042] Fully dissolve 16.36g of tert-butyl acrylate, 73ul of N,N,N′,N″,N″-pentamethyldiethylenetriamine, and 59.4mg of cuprous bromide into 30ml of N,N-dimethyl In methyl formamide, nitrogen gas was introduced for 30 minutes. Then add 57ul of ethyl 2-bromoisobutyrate, and react under nitrogen atmosphere at 60°C for 24h; : 1, v) Precipitation of the polymer in the mixed medium, vacuum drying to constant weight at 60 ° C, to obtain a macromolecular initiator of white powder;

[0043] 2. Synthesis of Diblock Polymers

[0044] Fully dissolve 12.48g of styrene, 28ul of N,N,N′,N″,N″-pentamethyldiethylenetriamine, and 45mg of cuprous bromide into 20ml of N,N-dimethylformamide During the process, nitrogen gas was introduced for 30 minutes. Then add 12.48g of the macromolecular initiator obtained in step 1, and react for 24h at ...

Embodiment 2

[0059] The difference between Example 2 and Example 1 is: the mass ratio of super-crosslinked microporous nanoparticles and polyvinyl alcohol in the microporous composite nanofiber membrane prepared by electrospinning in Example 2, that is, the super-crosslinked micropores are increased. The content of nanoparticles in the blend, so as to explore whether the increase of hypercrosslinked microporous nanoparticles can still be spun and the change of its pore properties.

[0060] Such as Figure 7 As shown, from the FESEM topography images from A to D, it can be seen that the content of hypercrosslinked microporous nanoparticles is gradually increasing, but good fiber morphology can still be maintained, and the fiber diameter is decreasing.

[0061] Such as Figure 8 As shown, with the increase of hypercrosslinked microporous nanoparticles, the specific surface area of ​​the microporous composite membrane increases.

[0062] Such as Figure 9 As shown, with the increase of hyp...

Embodiment 3

[0064] A method for preparing a microporous composite nanofibrous membrane, comprising the steps of:

[0065] 1. Synthesis of macroinitiators

[0066] Fully dissolve 15.16g of tert-butyl acrylate, 71ul of N,N,N′,N″,N″-pentamethyldiethylenetriamine, and 56.4mg of cuprous bromide into 30ml of N,N-dimethyl In methyl formamide, nitrogen gas was introduced for 30 minutes. Then add 59ul of ethyl 2-bromoisobutyrate, and react under nitrogen atmosphere at 60°C for 24h; : 1, v) Precipitation of the polymer in the mixed medium, vacuum drying to constant weight at 60 ° C, to obtain a macromolecular initiator of white powder;

[0067] 2. Synthesis of Diblock Polymers

[0068] Fully dissolve 13.48g of styrene, 29ul of N,N,N′,N″,N″-pentamethyldiethylenetriamine, and 47mg of cuprous bromide into 25ml of N,N-dimethylformamide During the process, nitrogen gas was introduced for 30 minutes. Then add 11.48g of the macromolecular initiator obtained in step 1, and react for 24h at 120°C in a ...

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Abstract

The invention discloses a micro-pore composite nanofiber membrane preparation method which mainly includes the steps: firstly, sufficiently dissolving super-crosslinking micro-pore polymer nanoparticles and polyvinyl alcohol in waterborne solvents to obtain an original composite nanofiber membrane by an electrostatic spinning technique; secondly, soaking the original composite nanofiber membrane by diisocyanate solution to obtain a micro-pore composite nanofiber membrane. The prepared micro-pore composite nanofiber membrane has good fiber morphology, and a lot of super-crosslinking micro-porenanoparticles are formed in the nanofiber membrane, so that the nanofiber membrane has larger specific surface area and higher absorption property and can effectively adsorb methylene blue dyes in water.

Description

technical field [0001] The invention relates to a method for preparing a microporous composite nanofiber membrane by electrospinning, belonging to the field of sewage treatment. Background technique [0002] At present, the main sources of wastewater pollution in my country are aliphatic hydrocarbons, oily substances and dyes in industrial emissions. Among them, dye pollution, as a common industrial pollution, is constantly endangering human health and environmental safety. Methylene blue is a common dye, which has important applications in medicine, textiles and other fields, but the accompanying pollution problem is also quite serious. Efficient treatment of methylene blue in water is a topic of great concern at present. [0003] Common sewage treatment methods include biodegradation, physical separation, chemical sedimentation, and substance adsorption. Among them, substance adsorption has attracted much attention because of its simple operation, convenient design, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/407D04H1/4309D04H1/728B01D53/02C02F1/28D06M13/395D01F8/10D06M101/24D06M101/18C02F101/38
CPCD04H1/407D04H1/4309D04H1/728D06M13/395D01F8/10B01D53/02C02F1/285D06M2101/24D06M2101/18B01D2257/504C02F2101/40Y02C20/40
Inventor 江兵兵潘耀宇望芸竺雅琳陈学琴李草许子强
Owner HUBEI UNIV
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