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A carbon nanometer tube based lightweight magnetic composite particle for magnetic rheological fluid and method for preparing same

A technology of composite particles and carbon nanotubes, applied in the field of composite materials and functional materials, can solve the problems of reducing the density of magnetic materials, sacrificing the shear yield stress of magnetorheological fluid, and unsatisfactory effects

Inactive Publication Date: 2005-06-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the effect is still unsatisfactory
However, some literatures report that the density of the magnetic material is reduced and the problem of easy settlement is solved, but at the expense of greatly sacrificing the shear yield stress of the magnetorheological fluid.

Method used

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  • A carbon nanometer tube based lightweight magnetic composite particle for magnetic rheological fluid and method for preparing same
  • A carbon nanometer tube based lightweight magnetic composite particle for magnetic rheological fluid and method for preparing same
  • A carbon nanometer tube based lightweight magnetic composite particle for magnetic rheological fluid and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The raw materials used are as follows:

[0033] Carbon nanotubes (CNTs), Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences, tube diameter 8-15nm, tube length about 50μm, purity>95wt%, specific surface area>233m 2 / g, conductivity>10 2 s / cm.

[0034] Sulfuric acid, analytically pure, content 95%-98%, Shanghai Jianxin Chemical Reagent Factory.

[0035] Nitric acid, analytically pure, HNO 3 Content 65.0%-68.0%, Shanghai Qianjin Chemical Reagent Factory.

[0036] Sodium hydroxide, analytically pure, Shanghai Shanhai Engineering Group Experimental Second Factory.

[0037] Sodium lauryl sulfate, chemically pure, China Pharmaceutical (Group) Shanghai Chemical Reagent Company.

[0038] Ferrous sulfate heptahydrate, analytically pure, the Second Experimental Factory of Shanghai Shanhai Institute of Technology.

[0039] Ferric chloride, analytically pure, China Pharmaceutical (Group) Shanghai Chemical Reagent Company.

[0040] The ratio of raw materials used...

Embodiment 2

[0056] The proportioning of used raw materials by weight share is as follows:

[0057] Carbon nanotubes 100 parts

[0058] Sodium Lauryl Sulfate 100 parts

[0059] Sulfuric acid 500 parts

[0060] Hydrochloric acid 200 parts

[0061] Fe(NO 3 ) 3 600 copies

[0062] FeCl 2 800 copies

[0063] NH 3 ·H 2 O 500 copies

[0064] Preparation of magnetic composite particles:

[0065] The preparation process is the same as in Example 1, wherein the heating and reflux time is 5 hours, the reaction temperature is controlled above 50° C., and the reaction time is about 2 hours. The obtained magnetic particles have properties such as Figure 1-Figure 3 Similar to shown.

Embodiment 3

[0067] The proportioning of used raw materials by weight share is as follows:

[0068] Carbon nanotubes 100 parts

[0069] 15 parts sulfuric acid

[0070] FeCl 3 100 copies

[0071] Fe(NO 3 ) 3 100 copies

[0072] NaOH 100 parts

[0073] The preparation process is the same as in the example, wherein the heating and reflux time is 1 hour, the reaction temperature is controlled above 60° C., and the reaction time is about 2 hours. The obtained magnetic particles have properties such as Figure 1-Figure 3 Similar to shown.

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Abstract

This invention belongs to compound material and function material technique field and in detail to light magnetic particles with magnetic rheologic liquid and its process method. The material uses nanometer tube special electromagnetism property and a layer of Fe#-[3] O#-[4] on the surface. It in detail is processed with the nanometer tube, dispersant, strong acid, trivalence iron salt, two iron salt and alkali as certain weight proportion through certain process.

Description

technical field [0001] The invention belongs to the technical field of composite materials and functional materials, and in particular relates to a light magnetic particle used in magnetorheological fluid and a preparation method thereof. Background technique [0002] Magnetorheological fluid is a new type of functional material, which was born in the 1960s. After many years of hard work of domestic and foreign technical workers, fruitful results have been achieved in this field. However, the magnetic particles in the traditional magnetorheological fluid have the characteristics of easy aggregation and sedimentation because the density is much higher than that of the medium, which seriously affects the performance of the magnetorheological fluid. Although many researchers have done a lot of research on these issues. But the effect is still unsatisfactory. However, some literatures report that the density of the magnetic material is reduced to solve the problem of easy set...

Claims

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Application Information

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IPC IPC(8): H01F1/44
Inventor 浦鸿汀蒋峰景
Owner TONGJI UNIV
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