Polyaniline coated magnetic carbon-nano tube composite material and preparation method thereof

A technology of magnetic carbon nanotubes and composite materials, applied in the field of nanomaterials, can solve the problems of easy oxidative discoloration of nano-iron tetroxide, reduced electrical conductivity of materials, easy detachment of nano-iron tetroxide particles, etc., and achieves good application prospects, The effect of improving electrical conductivity

Inactive Publication Date: 2008-04-16
FUDAN UNIV
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Problems solved by technology

Some studies have dispersed carbon nanotubes in an aqueous solution containing ferric and ferrous ions, and prepared carbon nanotubes/nano ferric oxide composites after dripping ammonia water [Qu S., Wang J., Kong J.L. , Yang P.Y., Chen G., Talanta 2007, 71, 1096-1102.], but there are the following

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  • Polyaniline coated magnetic carbon-nano tube composite material and preparation method thereof
  • Polyaniline coated magnetic carbon-nano tube composite material and preparation method thereof

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Embodiment 1

[0018] 1. Preparation and characterization of polyaniline-wrapped magnetic carbon nanotube composites

[0019] 375 mg (40 mmol) ammonium iron (III) sulfate (NH 4 Fe(SO 4 ) 2 12H 2 O) and 156 mg (20 mmol) ammonium ferrous sulfate (II) ((NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 O) be dissolved in 20 milliliters of deionized water, wherein the mol ratio of ferric ion and ferrous ion is 2: 1, the total concentration of ferric ion and ferric ion is about 60mmol / L, then more than 90mg Wall carbon nanotubes (diameter 40-60 nanometers, length 5-15 microns, purity greater than 95%, Shenzhen Nano Harbor Co., Ltd.) are placed in the solution, ultrasonically dispersed for 15 minutes to obtain a black suspension solution, and then in the solution Add 1.5 milliliters of concentrated ammonia water (mass percent concentration 25-28%) dropwise, mechanically stir while adding, then this mixed solution is heated in 50 ℃ of water baths with water for 30 minutes, the magnet is placed on the bottom that ...

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Abstract

The invention belonging to the nanometer material field relates to composite material made of carbon nanometer tubes enwrapped by polyaniline and ferroferric oxide and the preparation method thereof. The invention ultrasonically disperses the carbon nanometer tubes in an aqueous solution containing ferric iron ions and ferrous iron ions and obtains carbon nanometer tubes/ ferroferric oxide composite material after adding ammonia. After washing and magnetic separation, the carbon nanometer tubes/ ferroferric oxide composite material disperses in a mixed liquor containing aniline, phosphoric acid and ammonium persulfate and the composite material of the invention is obtained after agitation. After water and alcohol washing and magnetic separation, finished products are obtained through drying or dispersing in absolute ethyl alcohol. The material which has the functions of electrical conductivity, magnetism, absorption and capability of absorbing and releasing material carrying negative charge in an aqueous solution can be applicable to the fields such as enzyme immobilization, bioactive substance separation, target-oriented medicine preparation, biosensor, environmental protection, etc. The invention which has simple preparation art, low cost and high raw material utilization factor is suitable for volume production.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a polyaniline-wrapped magnetic carbon nanotube composite material and its preparation technology. Background technique [0002] Since carbon nanotubes were first reported by Iijima [Iijima, S., Nature 1991, 354, 56-58.] in Japan in 1991, the material has been characterized by its unique structure, excellent electrical conductivity, high mechanical strength, and chemical stability. It has received extensive attention in related fields at home and abroad, and has made great breakthroughs in many new fields such as nanoelectronic devices, super composite materials, hydrogen storage materials, and catalyst carriers, which has attracted international attention in physics, chemistry, and materials. great interest in the field. In the past 10 years, the research and development of carbon nanotubes at home and abroad have been extremely active, and major breakthroughs have b...

Claims

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Application Information

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IPC IPC(8): C08L79/02C08K9/02C09C3/10C09C1/44
Inventor 陈刚刘尊张鲁雁
Owner FUDAN UNIV
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