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Method for preparing hollow ball and hollow ball with complex structure by template method

A composite structure, hollow sphere technology, applied in the preparation of inorganic, organic hollow spheres and composite structure hollow spheres, metal fields, can solve the problem of polymer can not be assembled and so on

Inactive Publication Date: 2008-09-10
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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  • Method for preparing hollow ball and hollow ball with complex structure by template method
  • Method for preparing hollow ball and hollow ball with complex structure by template method
  • Method for preparing hollow ball and hollow ball with complex structure by template method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] Example 1 Preparation of hollow spheres of polystyrene-polyacrylic acid / titanium dioxide composite structure and titanium dioxide hollow spheres

[0140] 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 hollow sphere with a composite structure is obtained in which the polystyrene-polyacrylic acid hollow sphere is used as a template and titanium dioxide is grown on the inner layer of the shell. After removing the polystyrene and polyacrylic acid from the hollow sphere of this composite structur...

Embodiment 2

[0142] Example 2 Preparation of polystyrene-polymethacrylic acid / magnetic triiron tetroxide composite structure hollow spheres and triiron tetroxide hollow spheres

[0143] 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. The hollow sphere of composite structure in which ferric oxide grows 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 res...

Embodiment 3

[0144] Example 3 Preparation of hollow spheres of polymethyl methacrylate-polyacrylic acid / calcium carbonate composite structure and hollow spheres of calcium carbonate

[0145] 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 ball is a hollow ball of a composite structure in which template calcium carbonate grows on the inner layer of the shell. After removing the polymethyl methacrylate and polyacrylic acid from the hollow sphere of this composite structure with chloroform, the hollow sphe...

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Abstract

The invention belongs to the field of materials with a hollow structure, in particular to a method for preparing hollow spheres of minerals, metals and organic matters and hollow spheres with compound structures as well as hollow spheres with photic, electrical, magnetic and catalytic properties and hollow spheres with compound structures thereof by taking a polymer hollow sphere as a template. The invention prepares the hollow spheres with compound structures by taking the polymer hollow sphere as the template and combining sol-gel, settlement reaction and redox process through the method of forcing interface or surface settlement, removes the template polymer through high sintering or selective extraction of a solvent to obtain the hollow spheres of minerals, metals and organic matters. The structure and the size of the hollow sphere can be controlled through controlling the reagent activity, the feeding mode, the reagent concentration and a circulation reaction method; besides, compounding of various matters can be realized; the hollow sphere of the invention not only has good dispersing performance, but also has excellent strength and size stability. The invention relates to the application of the materials with a hollow structure.

Description

[0001] related application [0002] This application is a divisional application of the Chinese invention patent application with the application number 200410009774.7, the application date is November 11, 2004, and the title is "Method for Preparing Hollow Spheres and Composite Hollow Spheres Using Template Method". technical field [0003] 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 [0004] 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-...

Claims

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Application Information

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IPC IPC(8): B01J13/02
Inventor 杨振忠杨穆马劲
Owner INST OF CHEM CHINESE ACAD OF SCI
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