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Nano high-molecular microsphere with conductivity and magnetism and its preparation method

A technology of nano-polymers and nano-microspheres, which is applied in the field of magnetic polymer nano-spheres and its preparation, and can solve the problems of large particle size, non-conductivity and nano-effects of magnetic polymer microspheres

Inactive Publication Date: 2004-07-28
中国科学院成都有机化学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the magnetic polymer microspheres prepared by the above method are large in particle size and do not have conductivity and nano-effects. In order to further improve the performance of the magnetic polymer microspheres and expand their application fields, we designed , magnetic and nano-characteristic polymer microspheres

Method used

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  • Nano high-molecular microsphere with conductivity and magnetism and its preparation method
  • Nano high-molecular microsphere with conductivity and magnetism and its preparation method
  • Nano high-molecular microsphere with conductivity and magnetism and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0022] The preparation method of the magnetic fluid is as follows: a stirrer, a reflux condenser, a N 2 Add 20-100g polyethylene glycol (Mw=4000), 60ml FeSO 4 Solution (concentration 5~10%), 15~50mlH 2 o 2 solution (concentration 1-5%), adjust the pH value to about 13 with 3M NaOH solution, react at 50-70° C. for 5-10 hours, and then dialyze repeatedly in the magnetic field to neutrality, and set aside.

[0023] After the ferrofluid is prepared, it is equipped with a stirrer, reflux condenser, N 2 Add 1.0g of magnetic fluid, 15.0g of aniline, 50.0g of ethanol and 40.0g of deionized water into a 250ml four-neck bottle with a through tube, stir at 300r / min, pass through N 2 . After 30 minutes, add 0.45 g of ammonium persulfate and react at 0°C for 10 to 12 hours. The obtained microspheres are magnetically separated, washed and soaked in 1M HCl to remove uncoated or incompletely coated magnetic fluids to obtain magnetic polymer nanometer microspheres.

[0024] Add 1.5g of d...

Embodiment 2

[0026] Equipped with stirrer, reflux condenser, N 2 Add 1.0g of ferrofluid, 10.0g of pyrrole, 50.0g of ethanol and 40.0g of deionized water into a 250ml four-neck bottle through the tube, stir at 300r / min, pass through N 2 . After 30 minutes, add 0.45g ammonium persulfate and react at 0°C for 10-12 hours. The obtained microspheres are magnetically separated, washed, soaked in 1M HCl to remove uncoated or incompletely coated magnetic fluid, and obtain magnetic polymer nanoparticle ball.

[0027] Add 1.5 g of dry nano-magnetic microspheres into a clean mortar, add dopant according to the required ratio, and mechanically grind at 30° C. for 8 hours. The product is dispersed in an aqueous solution to form an emulsion, magnetically separated, washed three times with methanol and ethanol, and then washed several times with water to obtain black conductive magnetic polymer nanospheres.

[0028] The nano-microspheres prepared by the present invention have the following characterist...

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Abstract

The present invention discloses a nano high-molecular microsphere with electric conductivity and magnetism and its preparation method. It belongs to the field of functional material. The structure of microsphere is core-shell type, core is formed from magnetic matter and the shell layer is composed of any kind of polyaniline, cross-linked polyaniline, polypyrrole and polythiophene and copolymer of them and other monomer with reactive funcitonal group. Its preparation method includes the following steps: firstly, in the pressure of magnetic flow body and initiator making polymerization to obtain core-shell type magnetic high-molecular nano microsphere, then making adulteration reaction to make the above-mentioned microsphere have electric conductivity.

Description

Technical field [0001] The invention relates to the field of functional materials, in particular to a magnetic polymer nano-microsphere and a preparation method thereof. Background technique [0002] At present, the preparation of magnetic microspheres mainly includes embedding method and monomer polymerization method. The embedding method is to disperse magnetic particles in a polymer solution, and obtain magnetic polymer microspheres by atomization, flocculation, deposition, evaporation and other means. As described in patents US 4 495 393,1987 and US 4 672 040,1987. The preparation of magnetic microspheres by embedding method is simple, but the obtained particles have a wide particle size distribution, irregular shape, difficult to control the particle size, and some impurities such as emulsifiers are mixed in the shell. The monomer polymerization method is to add initiators, stabilizers, etc. to polymerize core / shell magnetic polymer microspheres in the presence of mag...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08L101/12
Inventor 彭宇行邓建国丁小斌张文传龙新平
Owner 中国科学院成都有机化学研究所
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