Nano magnetic polymer microsphere and preparation method thereof

A polymer microsphere and nano-magnetic technology, which is applied in the direction of microsphere preparation, microcapsule preparation, organic material/organic magnetic material, etc., can solve the problem of large particle size of magnetic microspheres, inability to fully function, instability, etc. question

Active Publication Date: 2013-12-25
北京安星达环保技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] But above-mentioned these known methods still have some shortcomings, as the functional monomer in the copolymerization process often has a part to coat the inside of the microsphere and can't fully play a role; Stable, not conducive to the polymerization reaction, so the synthesized magnetic microspheres have problems such as large particle size and wide distribution

Method used

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  • Nano magnetic polymer microsphere and preparation method thereof
  • Nano magnetic polymer microsphere and preparation method thereof
  • Nano magnetic polymer microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] (1) Preparation of oil-based Fe 3 o 4 Ferrofluid

[0072] Under the protection of nitrogen, 0.042mol of FeCl 3 ·6H 2 O and 0.021mol of FeCl 2 4H 2 O was dissolved in 120ml of deionized water at a constant temperature of 60°C to prepare an iron salt solution, and 40ml of 5mol / L ammonia water was added and stirred for 10min to obtain a precipitated reaction product. At this time, 5.6ml of oleic acid was added dropwise at a rate of 0.817mL / min. After stirring for 30 minutes, the temperature was raised to 90°C and kept for 30 minutes under the protection of nitrogen, and then cooled to room temperature to obtain the modified Fe 3 o 4 nanoparticles, the Fe 3 o 4 Nanoparticles dispersed in n-octane to obtain oil-based Fe 3 o 4 Ferrofluid;

[0073] (2) Preparation of Fe 3 o 4 / P(St) Magnetic Microsphere Seed Emulsion

[0074] Dissolve 6.4g of the magnetic fluid prepared in the above step (1), 7.93g of styrene, 0.938g of divinylbenzene, 0.9g of hexadecane and 0.27...

Embodiment 2

[0080] (1) Preparation of oil-based Fe 3 o 4 Ferrofluid

[0081] Under the protection of argon, 0.060mol of Fe(NO 3 ) 3 9H 2 O and 0.030mol Fe(NO 3 ) 2 ·6H 2 O was dissolved in 150ml of deionized water at a constant temperature of 55°C to prepare an iron salt solution. Add 50ml of 5mol / L NaOH aqueous solution and stir for 15min to obtain a precipitated reaction product. At this time, 6ml of oleic acid was added dropwise at a rate of 0.98mL / min. After stirring for 40 minutes, the temperature was raised to 95°C and kept for 35 minutes under the protection of argon, and then cooled to room temperature to obtain modified nano-Fe 3 o 4 , the obtained modified nano-Fe 3 o 4 Dispersed in n-heptane to obtain oleyl Fe 3 o 4 Ferrofluid;

[0082] (2) Preparation of Fe 3 o 4 / P(St) Magnetic Microsphere Seed Emulsion

[0083] Dissolve 6.8g of the magnetic fluid prepared in the above step (1), 8.16g of styrene, 4.59g of divinylbenzene, 3.98g of octadecane and 1.07g of sodium...

Embodiment 3

[0089] (1) Preparation of oil-based Fe 3 o 4 Ferrofluid

[0090] Under the protection of nitrogen, 0.03mol of Fe 2 (SO 4 ) 3 9H 2 O and 0.015mol FeSO 4 ·7H 2 Dissolve O in 100ml of deionized water at a constant temperature of 65°C to prepare an iron salt solution. Add 35ml of 5mol / L KOH aqueous solution and stir for 20min to obtain a precipitated reaction product. At this time, drop 5.8ml of oleic acid at a rate of 0.75mL / min , after stirring for 25 minutes, the temperature was raised to 85°C and kept for 40 minutes under the protection of nitrogen, and then lowered to room temperature, the modified nano-Fe 3 o 4 , the obtained modified nano-Fe 3 o 4 Dispersed in n-hexane to obtain oleyl Fe 3 o 4 Ferrofluid;

[0091] (2) Preparation of Fe 3 o 4 / P(St) Magnetic Microsphere Seed Emulsion

[0092] 6.1g of the magnetic fluid prepared in the above step (1), 7.93g of styrene, 0.293g of N,N-methylenebisacrylamide, 1.31g of dodecane and 0.66g of sodium dodecylbenzenesu...

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Abstract

The invention provides a nano magnetic polymer microsphere and a preparation method thereof. The preparation method includes the steps: (1) preparing lipophilic Fe3O4 nano particles, (2) preparing Fe3O4 / P(St) magnetic microsphere seed emulsion, (3) preparing the nano magnetic polymer microsphere, and if appropriate, subjecting the nano magnetic polymer microsphere prepared in the step (3) to quaternized modification. The prepared surface-quaternized nano magnetic polymer microsphere has various advantages of excellent autostability, superparamagnetism, strong magnetic responsibility, narrow particle size distribution and the like, thereby having broad industrial application prospect.

Description

technical field [0001] The invention relates to a nano-polymer material and a preparation method thereof, more specifically to a surface quaternized nano-magnetic polymer microsphere and a preparation method thereof, belonging to the field of magnetic functional materials. Background technique [0002] As a representative product in the field of magnetic functional materials, magnetic polymer microspheres have attracted much attention due to their various special properties. In particular, this type of microspheres has two remarkable characteristics: 1. Superparamagnetism, that is, under the action of an external magnetic field It is magnetic, and the magnetic field disappears after the magnetic field is removed; 2. The characteristics of polymer particles, because of this property, a variety of biologically active functional groups (such as -COOH, -NH 2 etc.), which have broad application prospects and potential in biomedicine (such as targeted drugs, clinical diagnosis, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/42C08F212/08C08F212/14C08F212/36C08F8/44B01J13/02
Inventor 陈英闫哲陈东王路辉杨淑清
Owner 北京安星达环保技术发展有限公司
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