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Self-assembly method for high-load inorganic nano particle hybridized organic membrane

An inorganic nanoparticle and nanoparticle technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc.

Inactive Publication Date: 2010-12-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the characteristic of amphoteric oxide nanoparticles, it is proposed that under acidic or alkaline conditions, amphoteric oxides react with oppositely charged polyions to form positively or negatively charged nanoparticle inclusions. At present, this use The self-assembly method of nanoparticle hybrid film prepared by electrostatic adsorption between nanoparticle inclusion bodies has not been reported yet

Method used

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  • Self-assembly method for high-load inorganic nano particle hybridized organic membrane
  • Self-assembly method for high-load inorganic nano particle hybridized organic membrane
  • Self-assembly method for high-load inorganic nano particle hybridized organic membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The substrate is quartz glass, the polycation material used is polydiallyldimethylammonium chloride (PDDA, molecular weight is 100000-200000), the polyanion is polystyrene sulfonate sodium (PSS, molecular weight is 70000), Nano zirconia particles (ZrO 2 , within 100nm, 5wt%), the solvents of polydiallyl dimethyl ammonium chloride and sodium polystyrene sulfonate are water.

[0033] Assembly conditions and methods:

[0034] (1) polydiallyl dimethyl ammonium chloride is made into 0.94wt% solution 500ml with deionized water, leaves standstill for degassing, adds nanometer zirconia particle 8ml, adjusts pH value to be 12; Use deionized water Sodium polystyrene sulfonate was made into 500ml of a 1.2wt% solution, allowed to stand for defoaming, and 8ml of nano-sized zirconia particles were added;

[0035] (2) Ultrasonic the polydiallyldimethylammonium chloride solution for 120 minutes to uniformly disperse the nanoparticles, centrifuge for 10 minutes, and replace the supern...

specific Embodiment 2

[0045] The substrate is quartz glass, the polycation material used is polyethyleneimine (PEI, with a molecular weight of 60,000), the polyanion is polyacrylic acid (PAA, with a molecular weight of 4 million), and nano-sized zirconia particles (ZrO 2 , within 100nm, 5wt%), the solvents of polyethyleneimine and polyacrylic acid are all water.

[0046] Assembly conditions and methods:

[0047] (1) polyethylenimine is made into 0.5wt% solution 500ml with deionized water, leaves standstill to defoam, adds nano zirconia particle solution 1ml; Polyacrylic acid is made into 0.05wt% solution 500ml with deionized water, Let it stand for defoaming, and add 1ml of nano-zirconia particle solution;

[0048] (2) Ultrasound the polyethyleneimine solution for 120 minutes to uniformly disperse the nanoparticles, centrifuge for 10 minutes, and replace the supernatant with an equal volume of deionized water after centrifugation; repeat 3 times to obtain polyethyleneimine nanoparticles Encapsula...

specific Embodiment 3

[0057] The base membrane is made of polyacrylonitrile (PAN) material, a flat ultrafiltration membrane with a molecular weight cut-off and a membrane area of ​​28cm 2 , the polycation material used is polydiallyldimethylammonium chloride (PDDA, molecular weight is 100000~200000), the polyanion is polystyrene sulfonate sodium (PSS, molecular weight is 70000), nano zirconia particles (ZrO 2 , within 100nm, 5wt%), the solvents of polydiallyl dimethyl ammonium chloride and sodium polystyrene sulfonate are water.

[0058] Assembly conditions and methods:

[0059] (1) polydiallyl dimethyl ammonium chloride is made into 0.94wt% solution 500ml with deionized water, leaves standstill for defoaming, adds nanometer zirconia particle 8ml, adjusts pH to be 12; Use deionized water Sodium polystyrene sulfonate was made into 500ml of a 1.2wt% solution, allowed to stand for defoaming, and 8ml of nano-sized zirconia particles were added;

[0060] (2) Ultrasound the polydiallyldimethylammonium ...

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Abstract

The invention discloses a self-assembly method for a high-load inorganic nano particle hybridized organic membrane, which belongs to the technical field of membranes. The method comprises the following steps of: preparing membrane-forming solution from polycations and polyanions respectively, adding amphoteric oxide nano particles respectively, and adjusting pH values; performing ultrasonic treatment and centrifugation, and replacing solvents to prepare polyion nano particle envelope solution; impregnating a substrate or a basal membrane in the polyion nano particle envelope solution or performing dynamic filtration to form a membrane layer, and performing washing and blow-drying; impregnating the substrate or the basal membrane in the polyion nano particle solution loaded with opposite charges; performing the washing and the blow-drying; and repeating the membrane-forming, the washing and the blow-drying to form an inorganic nano particle hybridized polyelectrolyte membrane. The method has the advantages of hybridizing a polycation layer and a polyanion layer with the nano particles, improving the charge numbers of the nano particles in the double layers and effectively overcoming the defect of easy stripping of organic and inorganic layers of the prepared membrane during hybridization.

Description

technical field [0001] The invention relates to the preparation of organic-inorganic hybrid membranes, in particular to the preparation of high-load nanoparticle hybrid organic thin films and inorganic hybrid organic pervaporation membranes by using amphoteric oxide nanoparticles, and belongs to the technical field of membranes. Background technique [0002] With the rapid development of membrane technology, the research of membrane materials has been widely valued. Organic-inorganic hybrid membranes not only have the stability of inorganic membranes, but also have the surface characteristics endowed by organic functional groups, and are a kind of membrane materials with very wide applications. At present, the commonly used organic-inorganic hybrid membrane preparation methods include sol-gel method, blending method, thermally induced phase separation method, etc., but most of them are used for the preparation of porous membranes. For the dense organic-inorganic hybrid perva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D69/12B01D67/00
Inventor 张国俊李杰纪树兰
Owner BEIJING UNIV OF TECH
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