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Method for preparing super-hydrophobic nano-magnetic thin film

A nano-magnetic and super-hydrophobic technology, applied in the direction of the magnetic layer, can solve the problems of limiting the application range of super-hydrophobic nano-magnetic materials, high process requirements, and high cost, and achieve excellent super-hydrophobic performance, broad application prospects, and preparation process. simple effect

Inactive Publication Date: 2012-02-01
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common problems of the prepared super-hydrophobic magnetic materials are high cost, difficult operation and high process requirements, which limit the practical application range of super-hydrophobic nano-magnetic materials.

Method used

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  • Method for preparing super-hydrophobic nano-magnetic thin film
  • Method for preparing super-hydrophobic nano-magnetic thin film
  • Method for preparing super-hydrophobic nano-magnetic thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Preparation of nano-iron oxide-silica core-shell particles

[0026] 1.5g γ-Fe 2 o 3 Put it into a three-necked flask, then add 25mL of ammonia water, 200mL of absolute ethanol and 50mL of distilled water, ultrasonically disperse for 10 minutes, then add 5mL of tetraethyl orthosilicate, stir and react for 12 hours at 30°C, wash and centrifuge 3 to 5 times , and then dried at 100°C for 3 hours to obtain nano-γ-Fe 2 o 3 - Core-shell nanoparticles of silica.

[0027] 2. For nanometer γ-Fe 2 o 3 - Silica core-shell particles for surface modification

[0028] Weigh the above nano γ-Fe 2 o 3 - Disperse 1g of silica core-shell particles into 100mL of absolute ethanol, then add 10mL of vinyltriethoxysilane and 10mL of ammonia water, react at 30°C for 24 hours, then centrifuge and dry to obtain a surface covered with vinyl Modified Nano γ-Fe 2 o 3 - Silica core-shell particles.

[0029] 3. Preparation of nanometer γ-Fe 2 o 3 - Silica-polystyrene composite

[003...

Embodiment 2

[0037] 1. Preparation of nano-iron oxide-silica core-shell particles

[0038] 1g Fe 3 o 4 Put it into a three-necked flask, then add 20mL of ammonia water, 150mL of absolute ethanol and 40mL of distilled water, ultrasonically disperse for 10 minutes, then add 4mL of ethyl orthosilicate, stir and react for 15 hours at 25°C, wash and centrifuge 3 times, and finally Dry at 100°C for 3 hours to prepare nano-Fe 3 o 4 - Silica core-shell particles.

[0039] 2. On nano Fe 3 o 4 - Silica core-shell particles for surface modification

[0040] Weigh the above nano-Fe 3 o 4 - Disperse 1g of silica core-shell particles into 120mL of absolute ethanol, then add 10mL of vinyltriethoxysilane and 10mL of ammonia water, react at 25°C for 24 hours, then centrifuge and dry to obtain a surface covered with vinyl modified nano-Fe3 o 4 - Silica core-shell particles.

[0041] 3. Preparation of nano-iron oxide-silica-polystyrene composites

[0042] Nano-Fe modified by vinyl group on the su...

Embodiment 3

[0046] 1. Preparation of nano-iron oxide-silica core-shell particles

[0047] 1g γ-Fe 2 o 3 Put it into a three-necked flask, then add 20mL of ammonia water, 150mL of absolute ethanol and 40mL of distilled water, ultrasonically disperse for 10 minutes, then add 4mL of ethyl orthosilicate, stir and react for 12 hours at 30°C, wash and centrifuge 3 times, and finally Dry at 100°C for 3 hours to prepare nanometer γ-Fe 2 o 3 - Core-shell nanoparticles of silica.

[0048] 2. Surface modification of nano-iron oxide-silica core-shell particles

[0049] Weigh the above nano γ-Fe 2 o 3 - 1g of core-shell nanoparticles of silica, dispersed in 120mL of absolute ethanol, then added 12mL of 3-(methacryloyloxy)propyltrimethoxysilane and 10mL of ammonia water, reacted at 30°C for 24 hours, and then centrifuged and dry to obtain surface-modified nano-γ-Fe 2 o 3 - Core-shell nanoparticles of silica.

[0050] 3. Preparation of nano-iron oxide-silica-polystyrene composites

[0051] Na...

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Abstract

The invention discloses a method for preparing a super-hydrophobic nano-magnetic thin film. The method comprises the following steps of: preparing nano iron oxide-silica core-shell particles; adding the nano iron oxide-silica core-shell particles into an alcohol solution, and adding a silane coupling agent and a catalyst to obtain nano iron oxide-silica core-shell particles of which the surfaces are modified by ethylene; and dispersing the surface modified nano iron oxide-silica core-shell particles in a benzene organic solvent, adding an initiator and styrene to obtain a nano iron oxide-silica-polystyrene composite material, dispersing the nano iron oxide-silica-polystyrene composite material through ultrasonic waves, and preparing the super-hydrophobic nano-magnetic thin film by using acasting method or a pulling method. The method has the advantages of simple preparation process and low cost, and can be applied to the fields such as magnetic recording, magnetic separation, biomedicines, environmental protection, military and the like.

Description

technical field [0001] The invention relates to an organic-inorganic nano-magnetic composite material, especially a magnetic super-hydrophobic material, and belongs to the field of functional polymer composite materials. Background technique [0002] Nanotechnology is an important practical technology in today's society, so nanotechnology has become a strategic commanding height for the great powers in the world today. Nano magnetic material is a new type of magnetic material that appeared in the 1980s. As a new nano-inorganic / polymer magnetic functional composite material, nano-magnetic polymer materials have broad application prospects in magnetic recording, magnetic separation, biomedicine, environmental protection, and military affairs. Therefore, the research and development of new nano-magnetic materials has aroused widespread interest from all over the world. [0003] As a new type of magnetic material, superhydrophobic nano-magnetic thin films have both magnetic an...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08K9/06C08K3/22C08K3/36C08F112/08C08J5/18H01F10/20
Inventor 刘伟良张丽东徐文华王丽
Owner QILU UNIV OF TECH
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