Process and apparatus for dispersing and surface modifying nano and micrometer particles by aerosol process

A micron particle and surface modification technology, which is applied to the surface coating liquid device, inorganic pigment treatment, special surface, etc., can solve the problem that the monodisperse system cannot be formed, the modifier cannot be coated, and the particle modification layer Difficult to control and other issues

Inactive Publication Date: 2003-06-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the existing dry surface modification treatment equipment adopts mechanical mixing equipment, such as high-speed mixers, grinders, blenders, etc. Problems such as uneven surface modification and difficulty in controlling the particle modification layer
Moreover, for nanoparticle materials, due to the agglomeration of nanoparticles, the particles inside the agglomerates cannot be covered with modifiers, and a monodisperse system cannot be formed.

Method used

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  • Process and apparatus for dispersing and surface modifying nano and micrometer particles by aerosol process
  • Process and apparatus for dispersing and surface modifying nano and micrometer particles by aerosol process
  • Process and apparatus for dispersing and surface modifying nano and micrometer particles by aerosol process

Examples

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Embodiment Construction

[0043] An aerosol nano or micro particle material dispersion and surface modification process such as figure 1 shown. The gas is pressed into the dryer by the compressor, and enters the heater to be heated; part of the heated high-temperature gas sends the particles in the particle silo into the particle dispersing device, and uses the strong turbulent flow field of the high-speed air flow to disperse the particles, and part of the modified The modifying agent in the agent container is input into the atomizer to atomize or vaporize the modifying agent; the atomized or gasified modifying agent is fully mixed with the dispersed particles to obtain an aerosol; control The temperature and pressure of the aerosol system are used to modify the surface of the particles; after a certain period of time, the aerosol is sprayed out from the nozzle, and the temperature is reduced to complete the surface modification of the particles; finally, the collection of the modified particles is co...

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Abstract

An aerosol process for dispersing and surficially modifying the nano or micron particles includes such steps as dispersing said particles by the strong turbulent flow field of high-speed airlflow, atomizing the modifier, spraying it in said dispersed particle system to obtain aerosol, coating the particles at controlled temp and pressure, spraying out for lowering its temp, and collecting the modified particles.

Description

technical field [0001] The invention relates to a treatment for modifying the surface of materials, in particular to a process and equipment for dispersing and surface modifying nano or micro particle materials by aerosol method, which can be widely used in various nano or micro particle materials. Dispersion and surface modification of micron particle materials. Background technique [0002] Due to its many special properties, nanoparticle materials have been widely used in many fields. However, due to the large specific surface area and high surface activity of nanoparticle materials, they are easy to agglomerate after preparation, so that the actual use of nanoparticle materials cannot achieve the expected effect, which restricts the development of nanoparticle materials. Therefore, in order to prevent the agglomeration of nanoparticle materials, it is very important and necessary to carry out dispersion treatment and surface modification treatment on nanoparticle materi...

Claims

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Application Information

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IPC IPC(8): B01J2/30B01J8/08B22F1/02C09C1/00C09C3/00
Inventor 沈志刚蔡楚江王明珠麻树林邢玉山赵小虎
Owner BEIHANG UNIV
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