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Method for modifying inorganic membrane by nano metal oxide

A nano-metal and inorganic membrane technology, applied in the field of inorganic membrane manufacturing, can solve the problems of easy blockage or reduction of membrane pores, reduced membrane permeation flux, uncontrollable particle size of sediment particles, etc. The effect of improving hydrophilicity and improving pollution resistance

Active Publication Date: 2012-07-04
重庆兀盾纳米科技有限公司
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  • Application Information

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Problems solved by technology

However, in the above method, at least one of the precipitation reactants is in excess, the particle size of the precipitate cannot be controlled, and it is easy to block or reduce the membrane pore channel, resulting in a decrease in the permeation flux of the membrane due to the change of the membrane pore structure, such as ZL200610082198.8 As stated, the modification resulted in a 17-30% decrease in membrane pore size

Method used

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  • Method for modifying inorganic membrane by nano metal oxide
  • Method for modifying inorganic membrane by nano metal oxide
  • Method for modifying inorganic membrane by nano metal oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Dissolve 2g of P123 in 500ml of xylene, then add 10g of aluminum isopropoxide to the above solution under vigorous stirring, continue stirring for 30min after clarification, and immerse the alumina microfiltration membrane (average pore size of 0.16μm) in the The resulting solution was sealed and stored at 25°C for 4 hours. Take out the alumina microfiltration membrane, and wash the microfiltration membrane with xylene for 3 times under ventilated conditions. Also dry the microfiltration membrane under ventilated conditions until there is no xylene odor. The tap water is heated, and the opening of the water container is greater than the length of the microfiltration membrane tube. Control the heating rate to keep the water slightly boiling, place the microfiltration membrane tube at 15 cm above the water surface, and process for 2 hours. The alumina microfiltration membrane after the hydrolysis treatment was placed in a 100°C oven for drying for 4 hours, and then the ...

Embodiment 2

[0034] The other implementation process is the same as that of Embodiment 1, and 5 g of aluminum isopropoxide is added under vigorous stirring conditions.

Embodiment 3

[0036] Dissolve 2g of P123 in 500ml of xylene, then add 10g of aluminum isopropoxide to the above solution under vigorous stirring, continue stirring for 30min after clarification, and immerse the alumina microfiltration membrane (average pore size of 0.16μm) in the in the resulting solution. The aluminum oxide microfiltration membrane and the aluminum isopropoxide xylene solution were simultaneously transferred into a reaction kettle with a polytetrafluoroethylene liner, sealed, and subjected to solvent heat treatment at 120° C. for 2 hours. Take out the alumina microfiltration membrane, and wash the microfiltration membrane with xylene for 3 times under ventilated conditions. Also dry the microfiltration membrane under ventilated conditions until there is no xylene odor. The tap water is heated, and the opening of the water container is greater than the length of the microfiltration membrane tube. Control the heating rate to keep the water slightly boiling, place the micro...

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Abstract

The invention discloses a method for modifying an inorganic membrane by a nano metal oxide. The method comprises the following steps: soaking the inorganic membrane in nonaqueous solution of a metal alkoxide or thermally treating the inorganic membrane by a solvent, then promoting alkoxide hydration in the water vapor atmosphere, forming a continuous and even hydroxide membrane layer through an in-situ hydrolysis method, and heating the hydroxide membrane layer to form continuous nano metal oxide coatings with even and controllable thicknesses on the surface of the inorganic membrane and in the passage, thereby obtaining the nano metal oxide granule modified inorganic membrane. The method enables the modified coatings to be evenly distributed with controllable thicknesses, improves the hydrophilic property of the inorganic membrane, and can increase the penetration flux of the membrane.

Description

technical field [0001] The invention belongs to the technical field of inorganic film manufacture, and relates to a method for modifying an inorganic film with a nanometer metal oxide. Background technique [0002] Membrane separation technology is a rapidly developing emerging technology field. It is a physical-chemical treatment method that allows feed liquid components to selectively pass through the membrane. The driving force of this process is mainly the pressure difference or potential difference on both sides of the membrane. Components that cannot pass through the membrane are easily enriched and deposited on the membrane surface under the driving force or membrane adsorption, forming a filter cake layer, causing membrane fouling, and seriously reducing the permeation flux of the membrane. In addition to improving the operating conditions, the method of reducing membrane fouling is also the focus of research and technology development by enhancing the hydrophilicity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D67/00
Inventor 周健儿常启兵汪永清胡学兵张小珍
Owner 重庆兀盾纳米科技有限公司
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