Method for preparing PVDF super-amphiphilic oil-water separation membrane by fixing nanoparticles through in-situ polymerization and ionic cross-linking, and prepared membrane
An oil-water separation membrane and ion cross-linking technology, applied in semi-permeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problems of particle agglomeration, poor compatibility of PVDF, etc., achieve improved hydrophilicity, novel preparation method, The effect of good separation performance
Active Publication Date: 2021-06-01
ZHEJIANG UNIV OF TECH
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Problems solved by technology
[0004] The purpose of the present invention is to disclose a phase separation method of directly fixing nanoparticles on the surface through in-situ polymerization ion cross-linking and the super amphiphilic water separation membrane prepared therefrom, so as to solve the problem of particles appearing in the process of inorganic nanoparticle modified PVDF membrane Problems of agglomeration and poor compatibility with PVDF
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Embodiment 1
[0033] A phase separation method for directly immobilizing nanoparticles on the surface through in-situ polymerization ion crosslinking and the super amphiphilic water separation membrane prepared therefrom, comprising the following preparation steps:
[0034] 12% PVDF polymer film substrate, 0.03mmol of MAA and 0.03mmol of DMC, 0.04g of AIBN, 88% of NMP organic solvent were mixed and stirred to dissolve, and left to defoam to obtain the casting solution; Prepare a liquid film on the surface, and then put it into a coagulation bath, and then dry it after phase inversion and washing to obtain a porous super amphiphilic water separation PVDF membrane.
[0035] The coagulation bath is SiO 2 For the aqueous solution of the sol, the phase inversion time is 20 min, and the film drying temperature is 85°C.
[0036] The addition time of the initiator, after other substances were mixed and stirred for 30min under nitrogen atmosphere, AIBN dissolved in 1.25g of NMP organic reagent was ...
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Abstract
The invention discloses a method for preparing a PVDF super-amphiphilic oil-water separation membrane by fixing nanoparticles through in-situ polymerization and ionic cross-linking, and the prepared membrane. The membrane comprises a polymer support layer, a porous polymer separation layer on the polymer support layer, and a surface micro-nano coarse structure which is arranged on the separation layer and simultaneously consists of an anionic group polymer, a cationic polymer and uniformly distributed inorganic nanoparticles. According to the preparation method disclosed by the invention, the phase separation method for directly fixing the nanoparticles on the surface through combination of in-situ crosslinking and phase inversion and the super-amphiphilic oil-water separation membrane prepared by the phase separation method are novel and simple to operate.
Description
technical field [0001] The invention belongs to the technical field of polymer membrane separation, and specifically relates to a method for preparing a PVDF super amphiphilic water separation membrane by in-situ polymerizing ion crosslinking and fixing nanoparticles, and the super amphiphilic water separation membrane prepared by the method. Background technique [0002] With the globalization of industrial development, water pollution has become a serious problem facing the world. Traditional water pollution treatment technologies have disadvantages such as high consumption, low single-stage separation efficiency, and cumbersome process, and it is urgent to solve these difficulties. In recent years, membrane separation technology has attracted the attention of researchers in water treatment. Because membrane separation technology has the advantages of low energy consumption, simple and flexible process, and strong versatility in the field of separation, it is widely used ...
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IPC IPC(8): B01D67/00B01D69/02B01D69/10B01D71/34
CPCB01D67/0093B01D67/0011B01D67/0016B01D67/0006B01D69/02B01D69/10B01D71/34B01D2325/36B01D2325/24
Inventor 薛立新朱瑶瑶赵雪婷陆叶强
Owner ZHEJIANG UNIV OF TECH