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Method for preparing magnetic ferroferric oxide/conductive polyaniline light-weight composite hollow microspheres

A technology of ferroferric oxide and conductive polyaniline, which is applied in the preparation of microspheres and microcapsule preparations, can solve the problems of high density and easy agglomeration of magnetic nanoparticles/conductive high polymer composite materials, and achieve low density and difficult Good aggregation and dispersion

Inactive Publication Date: 2010-11-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of high density and easy agglomeration of magnetic nanoparticles / conductive high polymer composite materials prepared by existing methods, and provides a preparation method of magnetic ferric oxide / conductive polyaniline lightweight composite hollow microspheres

Method used

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  • Method for preparing magnetic ferroferric oxide/conductive polyaniline light-weight composite hollow microspheres
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  • Method for preparing magnetic ferroferric oxide/conductive polyaniline light-weight composite hollow microspheres

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specific Embodiment approach 1

[0007] Specific embodiment one: the preparation method of the magnetic iron ferric oxide / conductive polyaniline lightweight composite hollow microspheres of the present embodiment is carried out according to the following steps: 1. The molar concentration of ferrous chloride is 0.1mol / L~0.5mol / L, the molar ratio of ferrous chloride to ferric chloride is 1:1.25~2.25 Weigh ferrous chloride and ferric chloride, under the protection of nitrogen, dissolve ferrous chloride and ferric chloride in a temperature of 50 ℃~90℃ distilled water to obtain iron ion solution; 2. According to the ratio of iron ion solution obtained in step 1 to sodium dodecylbenzenesulfonate: 100mL: 0.01g~0.03g weigh dodecylbenzene For sodium sulfonate, under the condition that the temperature of the iron ion solution obtained in step 1 is kept at 50°C-90°C, adjust the pH value of the solution to 7-12, then add sodium dodecylbenzenesulfonate, and stir for 0.5h ~5h, obtain the ferric oxide suspension; 3. Attach...

specific Embodiment approach 2

[0009] Specific embodiment two: this embodiment is different from specific embodiment one: the molar concentration of ferrous chloride in step one is 0.15mol / L~0.45mol / L, the mol ratio of ferrous chloride and ferric chloride is 1: 1.30~2.00. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the molar concentration of ferrous chloride in step one is 0.30mol / L, and the molar ratio of ferrous chloride to ferric chloride is 1:1.80 . Others are the same as in the first or second embodiment.

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Abstract

The invention provides a method for preparing magnetic ferroferric oxide / conductive polyaniline light-weight composite hollow microspheres, which relates to a method for preparing a magnetic ferroferric oxide / conductive polyaniline composite material. The invention solves the problems of high density and easy agglomeration of the traditional magnetic nanometer particle / conductive polymer composite material. The method comprises the following steps of: regulating ferrous chloride and ferric chloride solutions to be alkaline, adding sodium dodecyl benzene sulfonate and reacting to obtain ferroferric oxide; and modifying hollow glass microspheres by using poly(diallyldimethylammonium chloride) solutions after alkaline cleaning, then reacting the hollow glass microspheres with the ferroferric oxide, sequentially immersing obtained solid particles by using the poly(diallyldimethylammonium chloride) solutions and polystyrene sulfonic acid solutions, then adding the solid particles to aniline solutions, initiating polymerization by using ammonium persulfate, and washing and drying the solid particles to obtain the composite hollow microspheres. The composite hollow microspheres have both conductivity and magnetism, the density is 0.78-0.8g / cm<3>, and the composite hollow microspheres are not easy to agglomerate and are used for fields of military equipment stealth technology and civil anti-electromagnetic radiation.

Description

technical field [0001] The invention relates to a preparation method of magnetic iron ferric oxide / conductive polyaniline composite material. Background technique [0002] Magnetic nanoparticles / conductive polymer composites are new materials developed in the field of high-performance absorbing materials in recent years. Conductive high polymers have low density, easy structure control, and wide range of conductivity changes, showing strong design adaptability in electromagnetic wave absorption. Combining conductive polymers with magnetic nanoparticles will enable the material to have both electrical and magnetic properties and broaden the absorption band. The existing preparation methods of magnetic nanoparticles / conductive polymer composites are: mixing magnetic nanoparticles with conductive polymers, or preparing magnetic nanoparticles first, and then in-situ polymerizing conductive polymers on the nanoparticles, but this The magnetic nanoparticle / conductive high polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08K13/06C08K9/04C08K7/28C08K3/22C08G73/02B01J13/02
Inventor 徐慧芳张海礁王璟宋建伟
Owner HARBIN INST OF TECH
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