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Preparing method and application of functional AOPAN-AA nanofiber membrane

A nanofiber membrane and nanofiber technology, applied in the direction of fiber type, fiber treatment, chemical instruments and methods, etc., can solve the problems of small specific surface area of ​​the matrix and few active sites, and achieve low price, significant functionality, and specific surface area big effect

Active Publication Date: 2017-03-29
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of ATRP technology to graft AA molecular brushes requires active groups such as hydroxyl groups on the surface of the substrate as initiation sites. Currently, such modifications are based on conventional cellulose fibers, paper, etc., which have a small specific surface area and can be used. Provides few active sites for priming and grafting

Method used

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  • Preparing method and application of functional AOPAN-AA nanofiber membrane
  • Preparing method and application of functional AOPAN-AA nanofiber membrane
  • Preparing method and application of functional AOPAN-AA nanofiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Dissolve polyacrylonitrile powder (PAN, molecular weight 90,000) in N,N-dimethylformamide (DMF), prepare a spinning solution with a mass fraction of 12%, and perform electrospinning at room temperature. The spinning process parameters were set as follows: spinning speed 0.4mL / h, distance between the spinneret (inner diameter 0.7mm, needle point ground) and aluminum foil receiving plate 15cm, spinning static voltage 18kV, receiving time 10h.

[0032] 2. Soak PAN nanofibers in a hydroxylamine hydrochloride solution with a concentration of 0.2mol / L, a pH of 7, and a temperature of 65°C for 2 hours, then wash them with distilled water for 3-5 times, and dry them in vacuum at 40°C for 2 hours to prepare AOPAN nanofibers. Fiber membrane.

[0033] 3. Immerse 0.4 g of the AOPAN nanofiber membrane prepared in step 2 in 20 mL of tetrahydrofuran (THF) for 10 min, put it into a conical flask filled with 50 mL of tetrahydrofuran (THF), and add 55 μL of 2-bromo - 2-methylpropiony...

Embodiment 2

[0037] 1. Dissolve polyacrylonitrile powder (PAN, molecular weight 90,000) in N,N-dimethylformamide (DMF), prepare a spinning solution with a mass fraction of 11%, and perform electrospinning at room temperature. The spinning process parameters were set as follows: spinning speed 0.5mL / h, distance between the spinneret (inner diameter 0.7mm, needle point ground) and aluminum foil receiving plate 17cm, spinning static voltage 19kV, receiving time 12h.

[0038] 2. Soak PAN nanofibers in a hydroxylamine hydrochloride solution with a concentration of 0.2mol / L, a pH of 7, and a temperature of 65°C for 2 hours, then wash them with distilled water for 3-5 times, and dry them in vacuum at 40°C for 2 hours to prepare AOPAN nanofibers. Fiber membrane.

[0039] 3. Immerse 0.2 g of the AOPAN nanofiber membrane prepared in step 2 in 20 mL of tetrahydrofuran (THF) for 10 min, put it into a conical flask filled with 50 mL of tetrahydrofuran (THF), and add 60 μL of 2-bromo - 2-methylpropiony...

Embodiment 3

[0043] 1. Dissolve polyacrylonitrile powder (PAN, molecular weight 90,000) in N,N-dimethylformamide (DMF), prepare a spinning solution with a mass fraction of 10%, and perform electrospinning at room temperature. The spinning process parameters were set as follows: spinning speed 0.6mL / h, distance between spinneret (inner diameter 0.7mm, needle point ground) and aluminum foil receiving plate 17cm, spinning static voltage 20kV, receiving time 15h.

[0044] 2. Soak PAN nanofibers in a hydroxylamine hydrochloride solution with a concentration of 0.3mol / L, a pH of 7, and a temperature of 70°C for 2 hours, then wash them with distilled water for 3-5 times, and dry them in vacuum at 40°C for 2 hours to prepare AOPAN nanofibers. Fiber membrane.

[0045] 3. Immerse 0.5 g of the AOPAN nanofiber membrane prepared in step 2 in 20 mL of tetrahydrofuran (THF) for 10 min, put it into a conical flask containing 50 mL of tetrahydrofuran (THF), and add 70 μL of 2-bromo - 2-methylpropionyl bro...

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Abstract

The invention discloses a preparing method and application of a functional AOPAN-AA nanofiber membrane. The preparing method includes the following steps that A, electrostatic spinning PAN nanofiber is processed in an amidoxime mode to prepare AOPAN nanofiber containing an amidoxime active group; B, the functional AOPAN-AA nanofiber membrane is prepared from the AOPAN nanofiber prepared in the step A through atom transfer radical polymerization grafted acrylate. The obtained AOPAN-AA nanofiber membrane is stable in form, high in porosity and large in specific area, and a great number of carboxylic groups are grafted to the surface so that the material can be applied to the fields of macromolecule filtration, enzyme immobilization and metal ion adsorption and has remarkable functionality.

Description

technical field [0001] The invention belongs to the technical field of nanofiber membranes, and in particular relates to a preparation method and application of functional AOPAN-AA nanofiber membranes. Background technique [0002] Polyacrylonitrile (PAN), a common polymer, is mainly used to manufacture synthetic fibers (such as acrylic fibers), and is widely used in textiles, batteries and other industries. Polyacrylonitrile fibers have good bulkiness and warmth retention properties, and the prepared materials are soft to the touch, and have good weather resistance, mildew resistance, moth resistance and other properties. However, due to the poor wear resistance of PAN fiber, the fatigue resistance of the material is also poor, the hydrophilicity is not good, and there is basically no electrical conductivity, etc., which largely limits the application field of PAN fiber. [0003] Electrospinning refers to the process in which polymers form fibers through the action of an e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M14/10D06M13/376D06M13/368D04H1/728D01D5/00B01D71/78B01D67/00C02F1/44C02F1/28C12N11/08D06M101/28C02F101/20
Inventor 李鑫凤权武丁胜祝子枫刘锁
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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