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Mesoporous silica ball-polymer nanocomposite nanofiltration membrane and preparation method thereof

A mesoporous silica and nanocomposite technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of affecting the degree of polymerization of polyamide, deterioration of membrane performance, weak physical interaction force, etc. Achieve the effect of low production cost, good compatibility and simple operation process

Inactive Publication Date: 2014-10-29
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide particles are first dispersed in the oil phase and then loaded into the surface layer of the nanocomposite membrane through interfacial polymerization. When the titanium dioxide content exceeds 5wt%, it will seriously affect the degree of polymerization of polyamide and the performance of the membrane will deteriorate sharply.
However, the physical interaction between H-OMC and the membrane matrix is ​​still weak

Method used

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  • Mesoporous silica ball-polymer nanocomposite nanofiltration membrane and preparation method thereof
  • Mesoporous silica ball-polymer nanocomposite nanofiltration membrane and preparation method thereof
  • Mesoporous silica ball-polymer nanocomposite nanofiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0026] (1) Dissolve piperazine with a concentration of 1.0wt / v%, 0.2wt / v% sodium hydroxide in deionized water, and then add amino-modified mesoporous silica balls with a concentration of 0~0.05wt / v% (The diameter of the mesopore is about 2.2nm), sonicate for 20 minutes to disperse it evenly, and make an aqueous phase solution; immerse the wet polysulfone support membrane in the aqueous phase solution for 5 minutes, and roll it with a rubber roller after taking it out Support membrane surface, squeeze dry;

[0027] (2) Dissolving trimesoyl chloride with a concentration of 0.15wt / v% in cyclohexane to form an oil phase solution; immersing the support membrane in the oil phase solution, the reaction time is 1 minute, and then taken out;

[0028] (3) After the composite film was dried naturally in the air for 1 minute, at 70 o C oven heat treatment for 30 minutes. After being rinsed several times with deionized water, a mesoporous silica sphere-polymer nanocomposite nanofiltratio...

Embodiment 5-6

[0033] (1) Dissolve piperazine with a concentration of 1.0wt / v%, 0.2wt / v% sodium hydroxide in deionized water, and then add amino-modified mesoporous silica balls with a concentration of 0.03wt / v% and Unmodified mesoporous silica balls were dispersed uniformly by ultrasonication for 20 minutes to form an aqueous phase solution; the wet polysulfone support membrane was immersed in the aqueous phase solution for 5 minutes, and then removed with a rubber roller Roll on the surface of the support film and squeeze dry;

[0034] (2) with embodiment 1-4;

[0035] (3) with embodiment 1-4;

[0036] These examples are to investigate the effect of the amino modification of mesoporous silica spheres on the prepared mesoporous silica sphere-polymer nanocomposite nanofiltration membrane.

[0037]

[0038] From Examples 5-6, it can be known that the modified mesoporous silica spheres carry amino groups that have a great influence on the performance of the nanocomposite membrane. The ami...

Embodiment 7-10

[0040] (1) Dissolve piperazine and 0.2wt / v% sodium hydroxide in deionized water at a concentration of 1.0wt / v%, and then add amino-modified mesoporous silica spheres at a concentration of 0.03wt / v%. The pore size is about 0~3.4nm, ultrasonically dispersed for 20 minutes to make it evenly dispersed, and made into a water phase solution; soak the wet polysulfone support membrane in the water phase solution for 5 minutes, take it out and roll it with a rubber roller to support it Membrane surface, squeeze dry;

[0041] (2) with embodiment 1-4;

[0042] (3) with embodiment 1-4;

[0043] These several examples are to investigate the influence of different mesoporous silica sphere mesoporous pore diameters on the prepared mesoporous silica sphere-polymer nanocomposite nanofiltration membrane.

[0044]

[0045] It can be seen from Examples 7-10 that the spherical shape of mesoporous silica has a great influence on the performance of the nanocomposite nanofiltration membrane, and...

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Abstract

The invention belongs to the technical field of nano films, in particular to a mesoporous silicon dioxide sphere-polymer nano composite nano-filtration membrane and a preparation method thereof. The composite nano-filtration membrane is obtained by forming an aromatic polymer functional skin layer loading mesoporous silicon dioxide spheres on a porous supporting membrane. By the method, the mesoporous silicon dioxide spheres can be effectively loaded in the polymer functional skin layer of the composite membrane through chemical bonds, so that the nano composite nano-filtration membrane with excellent performance is obtained. The silicon dioxide spheres in the composite nano-filtration membrane have mesoporous structures, so that delivery of substances is facilitated; and the silicon dioxide spheres are combined into the polymer skin layer through the chemical bonds, so that the composite nano-filtration membrane is stable in structure and high in permeability, hydrophilic property and antifouling property. The method is simple, mild in condition and low in production cost, and has a good industrialized production and application prospect.

Description

technical field [0001] The invention belongs to the technical field of nanometer thin films, and in particular relates to a mesoporous silica ball-polymer nanocomposite nanofiltration membrane and a preparation method thereof. Background technique [0002] For the advantages of organic hybrid membranes and inorganic membranes, the lower the permeability of the dispersed phase of inorganic nanoparticles (istribution of carbon nanotubes in the membrane.minated polyphenylene oxde), the interfacial polymerization method is one of the most commonly used methods for preparing composite membranes. First, it has the advantages of simple operation and easy control. It uses two highly reactive monomers to undergo polymerization at the interface of two immiscible solvents, thereby forming a very thin dense layer on the surface of the porous support. Composite membranes with different properties can be obtained by adjusting the properties of the support and the dense skin. In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D69/12B01D69/10B01D67/00
Inventor 汤蓓蓓吴慧青武培怡
Owner FUDAN UNIV
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