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Preparation method and application of functional AOPAN-RC composite nanofiber film

A composite nanofiber and functional technology, applied in the direction of chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of single functional effect modification, limited application fields, and low mechanical strength, so as to improve hydrophilicity and expand Application fields, effects of enhancing acid and alkali resistance and strength

Inactive Publication Date: 2016-05-04
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although cellulose acetate membrane has the advantages of good hydrophilicity, large specific surface area, and good plasticity, its application fields are often limited due to its low mechanical strength, easy to be subjected to biological erosion, and acid and alkali resistance.
In view of the above shortcomings of cellulose acetate membrane, in the past, people often used graft modification, modification with nitromethane gas, physical mechanical modification and other modification methods to modify it, but the functional effect modification is relatively simple.

Method used

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  • Preparation method and application of functional AOPAN-RC composite nanofiber film
  • Preparation method and application of functional AOPAN-RC composite nanofiber film
  • Preparation method and application of functional AOPAN-RC composite nanofiber film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. First, accurately weigh 1.32g of cellulose acetate slices and 3.08g of PAN powder into a 50ml Erlenmeyer flask, then add 35.6g of DMF solvent, put it in a constant temperature water bath at 40°C, and stir it magnetically for 6 hours until fully dissolved. A PAN / CA composite spinning solution with a total mass fraction of 11% (wherein the mass ratio of PAN and CA is 7:3) was prepared.

[0032] 2. Put the PAN / CA homogeneous spinning solution prepared in step 1 into a 10ml syringe, and use a grinder to grind the syringe needle with an inner diameter of 0.7mm to make it smooth. The positive pole of the high-voltage power supply is connected to the needle point of the syringe fixed horizontally on the syringe pump. At room temperature, the flow rate of the spinning solution was adjusted to 0.5ml / h, the applied voltage was 18kv, and the distance between the needle tip and the collector was 20cm. A piece of aluminum foil was covered on a grounded fixed rectangular copper m...

Embodiment 2

[0037] 1. First, accurately weigh 1.20g of cellulose acetate slices and 2.80g of PAN powder into a 50ml Erlenmeyer flask, then add 36.0g of DMF solvent, put it in a constant temperature water bath at 40°C, and stir it magnetically for 6 hours until fully dissolved. A PAN / CA composite spinning solution with a total mass fraction of 10% (wherein the mass ratio of PAN and CA is 7:3) was prepared.

[0038] 2. Put the PAN / CA homogeneous spinning solution prepared in step 1 into a 10ml syringe, and use a grinder to grind the syringe needle with an inner diameter of 0.7mm to make it smooth. The positive pole of the high-voltage power supply is connected to the needle point of the syringe fixed horizontally on the syringe pump. At room temperature, the flow rate of the spinning solution was adjusted to 0.8ml / h, the applied voltage was 19kv, and the distance between the needle tip and the collector was 20cm. A piece of aluminum foil was covered on a grounded fixed rectangular copper m...

Embodiment 3

[0043] 1. First, accurately weigh 1.44g of cellulose acetate slices and 3.36g of PAN powder into a 50ml Erlenmeyer flask, then add 35.2g of DMF solvent, put it in a constant temperature water bath at 40°C, and stir it magnetically for 6 hours until fully dissolved. A PAN / CA composite spinning solution with a total mass fraction of 12% (wherein the mass ratio of PAN and CA is 7:3) was prepared.

[0044] 2. Put the PAN / CA homogeneous spinning solution prepared in step 1 into a 10ml syringe, and use a grinder to grind the syringe needle with an inner diameter of 0.7mm to make it smooth. The positive pole of the high-voltage power supply is connected to the needle point of the syringe fixed horizontally on the syringe pump. At room temperature, the flow rate of the spinning solution was adjusted to 0.7ml / h, the applied voltage was 18.5kv, and the distance between the needle tip and the collector was 19cm. A piece of aluminum foil was covered on a grounded fixed rectangular copper...

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Abstract

The invention discloses a preparation method and application of a functional AOPAN-RC composite nanofiber film. The method includes the following steps that firstly, polyacrylonitrile (PAN) and cellulose acetate (CA) are dissolved in a polar organic solvent for electrostatic spinning, and an electrostatic spinning process is adopted for preparing a PAN-CA composite nanofiber film; secondly, a 0.02-0.15 mol / L strong alkaline solution is adopted for carrying out hydrolysis modification on the PAN-CA composite nanofiber film to prepare a PAN-RC composite nanofiber film; a 0.1-0.2 mol / L hydroxylamine hydrochloride solution is adopted for carrying out amidoximation modification on the PAN-RC composite nanofiber film to obtain the functional AOPAN-RC composite nanofiber film. According to the method, as a large number of functional groups such as hydroxyl and amino are instructed in the modification process, the omposite nanofiber film has multifunctionality.

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-RC composite nanofiber membranes. Background technique [0002] Polyacrylonitrile (PAN) is a kind of polymer or copolymer prepared by polymerization of acrylonitrile monomer, which is widely used in textile, battery and other industries. However, due to the shortcomings of PAN fiber such as low strength, poor wear resistance, poor fatigue resistance, and poor hydrophilicity, the application range of PAN is also limited to a certain extent. In response to these shortcomings, a lot of research has been carried out at home and abroad: mainly to hydrolyze and modify PAN with conventional diameters, or to prepare composite spinning solutions containing functional polymers for electrospinning, but the above methods are often only to improve The effect of a single performance in a certain aspect of PAN is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/728B01D71/74B01D69/12B01D67/00C02F1/44
CPCB01D67/0002B01D69/12B01D71/74B01D2325/30C02F1/44D04H1/4382D04H1/728
Inventor 凤权武丁胜钱怡帆李曼蒋凡查尧天
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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