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Preparation method of novel organic-inorganic hybridization micropore separation membrane

A separation membrane and organic technology, applied in the field of membrane separation, can solve the problems of adverse effects on the structure and performance of hybrid membranes, easy loss of inorganic nanoparticles, easy occurrence of agglomeration, etc. Increase the effect of interaction

Active Publication Date: 2014-08-20
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to their high surface energy and large specific surface area, inorganic nanoparticles are prone to agglomeration, which adversely affects the structure and performance of hybrid membranes, and due to the weak interaction between the organic and inorganic phases, the separation membrane is difficult to maintain in the long-term. Inorganic nanoparticles added during use are easy to lose, causing secondary pollution

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  • Preparation method of novel organic-inorganic hybridization micropore separation membrane

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Embodiment 1

[0022] 60 g of poly(dimethylaminoethyl methacrylate) was grafted on the surface of 40 g of silica nanoparticles with a diameter of 100 nm by reversible addition-fragmentation chain transfer polymerization (RAFT), and centrifuged 10 times to obtain purified poly(dimethylaminoethyl methacrylate). (Dimethylaminoethyl methacrylate)-graft-silica organic-inorganic hybrid nanoparticles, the weight average molecular weight of the grafted polymer is 600,000 g / mol; 0.5g poly(dimethylaminomethacrylate) Ethyl ester)-grafted-silica organic-inorganic hybrid nanoparticles are dispersed in 99.5g of 5-bromovaleric acid in acetone solution (the mass percent concentration of 5-bromovaleric acid in the acetone solution of 5-bromovaleric acid is 10 ﹪), stirred at 10°C for 24 hours to achieve quaternization of poly(dimethylaminoethyl methacrylate), centrifuged 10 times to obtain purified quaternized organic-inorganic hybrid nanoparticles; 10 g Organic-inorganic hybrid nanoparticles, 50g N,N'-dimeth...

Embodiment 2

[0025]5 g of poly(diethylaminoethyl methacrylate) was grafted on the surface of 95 g of silica nanoparticles with a diameter of 30 nm by reversible addition-fragmentation chain transfer polymerization (RAFT), and centrifuged three times to obtain purified Poly(diethylaminoethyl methacrylate)-graft-silica organic-inorganic hybrid nanoparticles, the weight average molecular weight of the graft polymer is 2,000 g / mol; 10g poly(diethylaminoethyl methacrylate) Aminoethyl ester)-grafted-silica organic-inorganic hybrid nanoparticles are dispersed in 90g of 3-bromopropionic acid aqueous solution (the mass percent concentration of 3-bromopropionic acid in the aqueous solution of 3-bromopropionic acid is 1% ), stirred at 80°C for 0.5 hours, and centrifuged three times to obtain purified quaternized organic-inorganic hybrid nanoparticles; 0.5g quaternized organic-inorganic hybrid nanoparticles, 85g N,N'-dimethyl Acetamide, 12g polyvinylidene fluoride, 2.5g porogen (the mass ratio of poly...

Embodiment 3

[0027] 45 g of poly(diethylaminoethyl acrylate) was grafted on the surface of 55 g of silica nanoparticles with a diameter of 50 nm by reversible addition-fragmentation chain transfer polymerization (RAFT), and centrifuged six times to obtain purified poly( Diethylaminoethyl methacrylate)-graft-silica organic-inorganic hybrid nanoparticles, the weight average molecular weight of the grafted polymer is 400,000 g / mol; 5g poly(diethylaminoethyl methacrylate )-grafted-silica organic-inorganic hybrid nanoparticles dispersed in 95 g of 1,3-propane sultone in aqueous solution (1,3-propanesulfonic acid in aqueous solution of 1,3-propane sultone Stirring at 40°C for 8 hours at a mass percentage concentration of 2% to achieve quaternization of poly(diethylaminoethyl acrylate), centrifugation for 5 times to obtain purified quaternized organic-inorganic hybrid nanoparticles; 2g quaternized organic-inorganic hybrid nanoparticles, 79.5g N,N'-dimethylacetamide, 18g polyethersulfone, 0.5g por...

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Abstract

The invention discloses a preparation method of a novel organic-inorganic hybridization micropore separation membrane. The preparation method comprises the following steps: grafting a polymer on the surface of nano silicon dioxide through reversible addition-fragmentation chain transfer to obtain polymer-grafted-silicon dioxide organic-inorganic hybridization nanometer particles, dispersing the polymer-grafted-silicon dioxide organic-inorganic hybridization nanometer particles in a quaternization reagent solution, stirring for 0.5-24 hours, realizing quaternization of the grafted polymer to obtain quaternization hybridization nanometer particles; with the quaternization hybridization nanometer particles as a dispersing phase, and a polymer membrane material as a main phase, preparing the organic-inorganic hybridization micropore separation membrane through a non-solvent inductive phase separation method. According to the preparation method, the agglomeration behavior of inorganic nanometer particles can be effectively inhibited, the dispersibility of the inorganic nanometer particles in a polymer matrix is promoted, the interaction of an organic phase and an inorganic phase is increased, the stability of the inorganic nanometer particles in the polymer matrix is improved, and multiple performances of hydrophilia, permselectivity, anti-fouling performance and antibacterial property of the separation membrane can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a preparation method of a novel organic-inorganic hybrid microporous separation membrane. Background technique [0002] Membrane separation technology has gradually developed into a key technology to solve water resource problems, and has been highly valued by countries all over the world. Membrane is the core of the membrane process. At present, most membrane technologies rely on polymer membranes. Polymer membranes have the advantages of wide source of raw materials, easy processing, low cost, and good flexibility. They are widely used in water supply / drainage treatment, sewage treatment, seawater desalination and other fields. However, polymer films still have some shortcomings, such as high temperature resistance, resistance to organic solvents and chemical corrosion, and short lifespan. Moreover, most polymer membrane materials are highly hydrophobic...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D71/68B01D71/34B01D69/02
Inventor 朱丽静刘富薛立新
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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