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Nm microsphere of magnetic polymer and its preparing process

A nano-microsphere and polymer technology, applied in the field of polymer materials, can solve the problems of complex preparation process, and achieve the effect of simple operation and high stability

Inactive Publication Date: 2001-12-26
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process is more complicated
[0009] The above preparation methods of magnetic polymer microspheres can only synthesize 200nm or even micron-sized magnetic polymer microspheres, and there has been no relevant literature report on magnetic polymer microspheres with a particle size of less than 100nm.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: in 500ml flask, put into 3.7g FeCl 2 4H 2 O, 10.16 g FeCl 3 ·6H 2 O and 80ml H 2 O, blow nitrogen to drive oxygen for half an hour. 40ml 10molL -1 The NaOH solution was added dropwise to the iron salt solution under mechanical stirring, and the temperature was kept at 25°C. After the dropwise addition, the stirring was continued and the temperature was raised to 90° C. for one hour. After heating, the product was collected by magnetic separation and redispersed in 15ml HNO 3 (2molL -1 ) solution for 15 minutes, separated by a magnetic field. The collected product was washed with 50ml H 2 O and 200ml acetone were alternately washed twice and separated by a magnetic field. Finally, Fe 3 o 4 Particles are dispersed in 100ml 0.3molL -1 Sodium acetate solution, and heated to 90 ° C and stirred for 30 minutes to remove the remaining acetone. Fe at a concentration of 6% is obtained 3 o 4 Aqueous dispersion, where Fe 3 o 4 The particle size is le...

Embodiment 2

[0045] Embodiment 2: in 500ml flask, put into 5.17g FeSO 4 .7H 2 O, 9.54g Fe 2 (SO 4 ) 3 ·6H 2 O and 80mlH 2 O, blow nitrogen to drive oxygen for half an hour. 40ml 10molL -1 The NaOH solution was added dropwise to the iron salt solution under mechanical stirring, and the temperature was kept at 30°C. After the dropwise addition, the stirring was continued and the temperature was raised to 95° C. for one hour. After heating, the product was collected by magnetic separation and redispersed in 15ml HNO 3 (2molL -1 ) solution for 15 minutes, separated by a magnetic field. The collected product was washed with 50ml H 2 O and 200ml acetone were alternately washed twice and separated by a magnetic field. Finally, Fe 3 o 4 Particles are dispersed in 100ml 0.3molL -1 Sodium acetate solution, and heated to 90 ° C and stirred for 30 minutes to remove the remaining acetone. A concentration of 5.9% Fe was obtained 3 o 4 Aqueous dispersion, where Fe 3 o 4 The particle s...

Embodiment 3

[0048] Embodiment 3: in 500ml flask, put into 3.7g FeCl 2 4H 2 O, 10.16 g FeCl 3 ·6H 2 O and 80ml H 2 O, blow nitrogen to drive oxygen for half an hour. 40ml 10molL -1 The NaOH solution was added dropwise to the iron salt solution under mechanical stirring, and the temperature was kept at 15°C. After the dropwise addition, the stirring was continued and the temperature was raised to 70° C. for one hour. After heating, the product was collected by magnetic separation and redispersed in 15ml HNO 3 (2molL -1 ) solution for 15 minutes, separated by a magnetic field. The collected product was washed with 50ml H 2 O and 200ml acetone were alternately washed twice and separated by a magnetic field. Finally, Fe 3 o 4 Particles are dispersed in 100ml 0.3molL -1 Sodium acetate solution, and heated to 90 ° C and stirred for 30 minutes to remove the remaining acetone. Add an appropriate amount of water to dilute to obtain a concentration of 1.2% Fe 3 o 4 Aqueous dispersion...

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Abstract

A monometer-level microsphere of magnetic polymer is prepared from the hydrophilic monomers (acrylamide, acrylic acid, etc.) through preparing super-paramagnetic nm microspheres of iron oxide by chemical deposition method, adding emulsifier, trigger, cross-linking agent and said iron oxide microspheres, and reaction in redox or thermal triggering system. The resultant microsphere has super paramagnetism and adjustable granularity (70-140 nm).

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to polymer nanometer microspheres with superparamagnetic properties and a preparation method thereof. technical background [0002] Polymer microspheres have many unique advantages: large specific surface area; uniform and controllable particle size of microspheres; wide range of polymer sources, including natural and synthetic polymers; various copolymerization functional monomers and polymerization processes can be selected for Polymer microsphere design, etc. Therefore, functionalized polymer microspheres can be widely used in many fields, such as directional drug delivery in biochemistry and biomedicine, medical latex reagents, biomolecular labeling and tracing, etc. High-performance polymer coatings and inks, organic and inorganic composite materials, microencapsulation, polymer microporous materials, catalysis, adsorption and separation carriers (such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/06C08F2/22C08F2/34
Inventor 王雷邓勇华阿德尔哈米特·欧拉萨府寿宽
Owner FUDAN UNIV
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