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Modified polyacrylonitrile ultrafiltration membrane

A polyacrylonitrile and ultrafiltration membrane technology, applied in the field of membrane materials, can solve problems such as unsatisfactory antibacterial performance, unsatisfactory modification effect, and shortened service life, so as to improve flux recovery ability and antifouling performance , Improve the effect of tensile strength

Inactive Publication Date: 2016-08-24
安庆市天虹新型材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyacrylonitrile is a hydrophobic material, and the prepared membrane is prone to membrane fouling. In addition, its antibacterial performance is not very ideal, which shortens the service life of the membrane and increases the investment cost. Copolymerization, blending, plasma modification, etc., to improve its performance, but the current modification effect is still not very satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of modified polyacrylonitrile ultrafiltration membrane that the present invention proposes, its raw material comprises by weight: polyacrylonitrile 50 parts, cellulose acetate 3 parts, acrylonitrile-itaconic acid copolymer 1.5 parts, polyethylene glycol 5 parts 10 parts of polyvinyl alcohol, 0.1 parts of lithium chloride, 1.5 parts of calcium chloride, 0.1 parts of nano-zinc oxide, 1.5 parts of expandable graphite, 0.2 parts of multi-walled carbon nanotubes, 2 parts of polypropylene fiber, dimethyl ethyl ether 50 parts of amide, 2 parts of antibacterial agent, and 1 part of antioxidant.

Embodiment 2

[0016] A kind of modified polyacrylonitrile ultrafiltration membrane that the present invention proposes, its raw material comprises by weight: polyacrylonitrile 40 parts, cellulose acetate 15 parts, acrylonitrile-itaconic acid copolymer 0.3 part, polyethylene glycol 10 parts 2 parts, 2 parts of polyvinyl alcohol, 2 parts of lithium chloride, 0.2 parts of calcium chloride, 0.8 parts of nano-zinc oxide, 0.2 parts of expandable graphite, 1 part of multi-walled carbon nanotubes, 0.3 parts of polypropylene fiber, dimethyl ethyl ether 75 parts of amide, 1 part of antibacterial agent, and 2 parts of antioxidant.

Embodiment 3

[0018] A kind of modified polyacrylonitrile ultrafiltration membrane that the present invention proposes, its raw material comprises by weight: polyacrylonitrile 48 parts, cellulose acetate 6.5 parts, acrylonitrile-itaconic acid copolymer 1.2 parts, polyethylene glycol 6.5 parts 6.5 parts of polyvinyl alcohol, 0.8 parts of lithium chloride, 1.2 parts of calcium chloride, 0.35 parts of nano-zinc oxide, 1.0 parts of expandable graphite, 0.5 parts of multi-walled carbon nanotubes, 1.6 parts of polypropylene fiber, dimethyl ethyl ether 60 parts of amide, 1.7 parts of antibacterial agent, 0.3 part of antioxidant 1010, 1 part of antioxidant 3114, 0.2 part of antioxidant 168;

[0019] Wherein, the antibacterial agent is prepared according to the following process: add N-(4-hydroxy-3-methoxybenzyl)acrylamide into dimethylformamide and stir evenly, heat up to 65°C, blow nitrogen, add 2-Hydroxyethyl methacrylate aqueous solution, N,N-dimethylaminoethyl methacrylate aqueous solution and ...

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PUM

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Abstract

The invention discloses a modified polyacrylonitrile ultrafiltration membrane. The modified polyacrylonitrile ultrafiltration membrane is prepared from, by weight, 40-50 parts of polyacrylonitrile, 3-15 parts of cellulose acetate, 0.3-1.5 parts of acrylonitrile-itaconic acid copolymer, 5-10 parts of polyethylene glycol, 2-10 parts of polyvinyl alcohol, 0.1-2 parts of lithium chloride, 0.2-1.5 parts of calcium chloride, 0.1-0.8 part of nano-zinc oxide, 0.2-1.5 parts of expansible graphite, 0.2-1 part of multiwalled carbon nanotubes, 0.3-2 parts of polypropylene fibers, 50-75 parts of dimethylacetamide, 1-2 parts of antibacterial agent and 1-2 parts of antioxidant. The modified polyacrylonitrile ultrafiltration membrane is good in antibacterial property, excellent in anti-fouling property and thermal stability, high in water flux and long in service life.

Description

technical field [0001] The invention relates to the technical field of membrane materials, in particular to a modified polyacrylonitrile ultrafiltration membrane. Background technique [0002] Polyacrylonitrile is another polymer commonly used to prepare ultrafiltration membranes next to cellulose acetate and polysulfone. It has good hydrolysis resistance, heat resistance, chemical stability and oxidation resistance. The prepared membrane At present, it has been widely used in ultrafiltration, dialysis, pervaporation and other fields. However, polyacrylonitrile is a hydrophobic material, and the prepared membrane is prone to membrane fouling. In addition, its antibacterial performance is not very ideal, which shortens the service life of the membrane and increases the investment cost. Copolymerization, blending, plasma modification, etc. are carried out to improve its performance, but the current modification effect is still not very satisfactory. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/42B01D71/16B01D69/02C08F220/58C08F220/28C08F220/34
CPCB01D69/02B01D71/16B01D71/42B01D2325/22B01D2325/30B01D2325/48C08F220/28C08F220/281C08F220/58C08F220/34
Inventor 魏松
Owner 安庆市天虹新型材料科技有限公司
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