Template process of preparing hollow ball and composite hollow ball

A technology of hollow spheres and templates, which can be used in the field of organic hollow spheres and composite structure hollow spheres to prepare inorganic substances and metals, and can solve the problems that polymers cannot be assembled.

Inactive Publication Date: 2006-05-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: repeated centrifugal cleaning is necessary to remove the residual polyelectrolyte in the system; to obtain a polymer layer of a certain thickness must go through multiple self-assembly; for uncharged polymers, it cannot be assembled

Method used

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  • Template process of preparing hollow ball and composite hollow ball
  • Template process of preparing hollow ball and composite hollow ball
  • Template process of preparing hollow ball and composite hollow ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0137] Example 1 Preparation of polystyrene-polyacrylic acid / titanium dioxide composite hollow spheres and titanium dioxide hollow spheres

[0138] Polystyrene-polyacrylic acid hollow sphere template, the outer layer of the hollow spherical shell is polystyrene, the inner layer is polyacrylic acid, the outer diameter is 500nm, and the thickness of the shell layer is 100nm. Take 0.1g of template particles and disperse them in 1g of tetrabutyl titanate, perform saturated adsorption for 4 hours, settle down the hollow spheres adsorbed with tetrabutyl titanate with a high-speed centrifuge, add 10g of water in ethanol solution (40wt%), and hydrolyze After reacting for 4 hours, a composite hollow sphere in which polystyrene-polyacrylic acid hollow spheres are used as a template and titanium dioxide is grown on the inner layer of the shell is obtained. After removing the polystyrene and polyacrylic acid from the hollow sphere of this composite structure with chloroform, the hollow sp...

Embodiment 2

[0140] Example 2 Preparation of polystyrene-polymethacrylic acid / magnetic Fe3O4 composite hollow sphere and Fe3O4 hollow sphere

[0141] 0.1g of polystyrene-polymethacrylic acid hollow structure emulsion particles, whose outer diameter is 1000nm, and the thickness of the shell is 150nm, is dispersed in 1g of 25wt% ferric chloride and 19wt% ferrous chloride mixed solution, saturated After 4 hours of adsorption, the polymer hollow spheres that have absorbed the solution were centrifuged and settled in a high-speed centrifuge, and then dispersed in 10g of 15wt% ammonia water, and hydrolyzed for 4 hours to obtain polystyrene-polymethacrylic acid hollow spheres as templates. Ferric oxide grows in composite hollow spheres in the inner layer of the shell. After removing polystyrene and polymethacrylic acid from the hollow sphere of this composite structure with chloroform, a hollow sphere of ferric oxide was obtained. The results of the transmission electron microscope show that the...

Embodiment 3

[0142] Example 3 Preparation of polymethyl methacrylate-polyacrylic acid / calcium carbonate composite hollow sphere and calcium carbonate hollow sphere

[0143] 0.1g of polymethyl methacrylate-polyacrylic acid hollow structure emulsion particle, its external diameter is 100nm, and the thickness of shell is 20nm, is dispersed in the calcium chloride solution of 15wt%, saturated adsorption 4 hours, will adsorb chlorine The hollow ball of calcium chloride solution is centrifuged and settled in a high-speed centrifuge, dispersed in 10g of 15wt% sodium carbonate aqueous solution, adjusted to pH 9 with 25wt% ammonia, and reacted for 4 hours to obtain polymethyl methacrylate-polyacrylic acid The hollow sphere is a composite hollow sphere in which template calcium carbonate grows on the inner layer of the shell. After removing polymethyl methacrylate and polyacrylic acid from this composite hollow sphere with chloroform, a hollow sphere of calcium carbonate was obtained. The results o...

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Abstract

The present invention belongs to the field of hollow material preparing technology, and is especially the preparation process of hollow ball of inorganic matter, metal, organic matter and composite structure with hollow polymer ball as template. The present invention prepares composite hollow ball through combining hollow polymer ball template with sol-gel, deposition reaction, oxidation-reduction process and through forced interface process or surface deposition process; and obtain hollow ball of inorganic matter, metal and organic matter through high temperature sintering or selective solvent extraction to eliminate template polymer. The control of hollow ball structure and size and the compounding of several kinds of matters may be realized through controlling reactant activity, material feeding mode, reactant concentration and circulating reaction process. The hollow ball has excellent dispersivity, high strength and size stability. The present invention also relates to the application of these hollow structure materials.

Description

technical field [0001] The invention belongs to the field of hollow structural materials, and in particular relates to a method for preparing hollow spheres of inorganic matter, metal, organic matter and composite structure hollow spheres by using polymer hollow spheres as templates. Background technique [0002] Hollow structure sphere is a functional material with special structure. Hollow sphere has great application prospects in the fields of catalysis, drug delivery, artificial cells, lightweight fillers, insulating materials, low dielectric materials, and photonic crystals. It is a common method to prepare such materials by colloidal particles with core-shell structure. The shell of another (or several) substances is coated or reacted on the surface of a particle, thus endowing the particle with new characteristics. For example, shell substances can change the surface charge of colloidal particles, surface reaction characteristics, and enhance their stability and disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
CPCB01J13/02
Inventor 杨振忠杨穆马劲
Owner INST OF CHEM CHINESE ACAD OF SCI
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