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Preparation method for hydrophilic polyacrylonitrile separation film

A technology of polyacrylonitrile and separation membrane, applied in chemical instruments and methods, semi-permeable membrane separation, membrane, etc., to achieve good anti-pollution performance, low cost, and protein reduction effects

Active Publication Date: 2017-09-01
QUJING NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to disclose a preparation method of a hydrophilic polyacrylonitrile separation membrane, to solve the shortcomings of the existing PAN membrane hydrophilic modification method, and to use polyacryloylmorpholine (PACMO) to modify the surface of the PAN membrane , to obtain a hydrophilic polyacrylonitrile separation membrane with good anti-pollution performance

Method used

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  • Preparation method for hydrophilic polyacrylonitrile separation film
  • Preparation method for hydrophilic polyacrylonitrile separation film
  • Preparation method for hydrophilic polyacrylonitrile separation film

Examples

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Effect test

Embodiment 1

[0036] (1) Synthesis method of PAN-co-PHEMA copolymer: Weigh 0.32 mol of AN and 0.04 mol of HEMA and disperse them in 50ml of pure water. After passing nitrogen for 15 minutes, add initiator 0.046g of ammonium persulfate and 0.02g of sulfite sodium hydrogen. After continuing to pass nitrogen gas for 10 min, the reaction vessel was sealed. React at 60°C for 5 h. After the reaction, the product was filtered, washed with pure water, and dried in an oven at 60°C.

[0037] (2) Preparation of PAN-co-PHEMA copolymer flat film: Weigh 10g of PAN-co-PHEMA copolymer, put it in a 250 ml three-neck flask containing 90g of DMSO, stir and dissolve in an oil bath at 60°C, and wait for the dissolution After standing still for 24 h for defoaming. Scratch the primary film with a 200 μm doctor knife, and immerse it in a pure water coagulation bath at 25°C to solidify to form a film. After the film sample is formed and peeled off from the glass plate, place it in distilled water for 24 hours. ...

Embodiment 2

[0041] (1) ZrO 2 - Synthesis of g-PACMO: Same as Example 1.

[0042] (2) Preparation of PAN-co-PHEMA copolymer flat film: Same as Example 1.

[0043] (3) Preparation of polyacryloylmorpholine (PACMO) modified PAN film: the main preparation process is the same as in Example 1. The main difference is that the amount of ACMO monomer added during the reaction is 0.06mol.

[0044] In this example, the obtained PACMO modified PAN membrane (marked as M3) had an initial water contact angle of 56º and an adsorption capacity of BSA of 25.6 μg / cm 2 .

Embodiment 3

[0046] (1) ZrO 2 - Synthesis of g-PACMO: Same as Example 1.

[0047] (2) Preparation of PAN-co-PHEMA copolymer flat film: Same as Example 1.

[0048] (3) Preparation of polyacryloylmorpholine (PACMO) modified PAN film: the main preparation process is the same as in Example 1. The main difference is that the amount of ACMO monomer added during the reaction is 0.08mol.

[0049] In this example, the obtained PACMO modified PAN membrane (marked as M4) had an initial water contact angle of 51º and an adsorption capacity of BSA of 16.8 μg / cm 2 .

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Abstract

The invention relates to a preparation method for a hydrophilic polyacrylonitrile separation film. The method comprises the following steps: (1) taking acrylonitrile (AN) and hydroxyethyl methacrylate (HEMA) as reaction monomers and compounding into an amphipathic copolymer PAN-co-PHEMA; (2) taking the compounded PAN-co-PHEMA as a film material and adopting an immersing phase-inversion method for preparing a panel separating film; and (3) processing the PAN-co-PHEMA panel film with acryloyl chloride, introducing a carbon-carbon double bond into the film surface and further reacting with acryloyl morpholine (ACMO), thereby acquiring the hydrophilic polyacrylonitrile separation film. The hydrophilic ACMO with a repelling property to the protein adsorption is utilized to modify the PAN film, so that the PAN separation film with an excellent antifouling property is acquired. The technology is simple, and the cost is low. The hydrophily of the prepared modified film is better than that of pure PAN film, and the protein absorbed to the film surface is obviously reduced. The hydrophilic polyacrylonitrile separation film can be developed and used as a sewage processing separation film and a hemodialysis film.

Description

technical field [0001] The invention belongs to a preparation method of a hydrophilized polyacrylonitrile separation membrane, and relates to a preparation technology of a polymer separation membrane with good hydrophilic performance. Background technique [0002] Membrane separation technology has been widely used in petrochemical, sewage treatment, medical and health, food processing and other fields due to its high separation efficiency, no secondary pollution and easy operation and scale-up. Membrane materials are one of the core contents of membrane separation technology. At present, commonly used membrane materials are mainly organic polymer materials, such as polysulfone (PSF), polyethersulfone (PES), polyvinylidene fluoride (PVDF), polypropylene (PP) ) and polyacrylonitrile (PAN), etc. Among them, PAN has become a leader among many organic polymer membrane materials due to its good chemical stability, thermal stability, mechanical properties and general solvent resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/42B01D69/02B01D67/00
CPCB01D67/0006B01D69/02B01D71/42B01D2325/36
Inventor 申向汪帆
Owner QUJING NORMAL UNIV
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