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Preparation of organic-inorganic composite microballoons

An inorganic composite microsphere, organic technology, applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of low mechanical strength, time-consuming, low embedding rate of inorganic particles, etc.

Inactive Publication Date: 2008-08-27
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, most of the inorganic particles are hydrophilic and have poor affinity with organic matter. In order to disperse the inorganic particles evenly in the organic monomers, it is necessary to implement hydrophobic treatment on the inorganic particles or use a dispersant. Dispersant is a high-cost and time-consuming topic; secondly, the embedding rate of inorganic particles is low; thirdly, there are few types of matrix polymers for composite microspheres, most of which are based on polystyrene or acrylic ester, with low mechanical strength , poor wear resistance, high temperature resistance, etc.

Method used

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  • Preparation of organic-inorganic composite microballoons

Examples

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Effect test

Embodiment 1

[0033] Polystyrene, Nylon 6 and TiO with a particle size of 30nm 2 After weighing according to the weight ratio of 80 / 20 / 10, it was added to a Haake rheometer for blending. The blending temperature was 240° C., the rotation speed was 100 rpm, and the time was 10 minutes. The resulting blend was heat-treated at 240°C for 10 minutes and then dissolved in toluene. After 2 hours, it was filtered with an acid-proof funnel under reduced pressure, washed, purified, and TiO was separated. 2 / Nylon 6 composite microspheres, the diameter of the obtained microspheres is about 2 μm.

Embodiment 2

[0035] Polystyrene, hexamethylene adipamide prepolymer and Fe with a particle size of 20nm 3 o 4 After weighing according to the weight ratio of 60 / 40 / 15, it was added to a Haake rheometer for blending. The blending temperature was 240° C., the rotation speed was 100 rpm, and the time was 10 minutes. The resulting blend was heat-treated at 240°C for 10 minutes and then dissolved in toluene. After 2 hours, it was filtered with an acid-resistant funnel under reduced pressure, washed, purified, and separated to obtain nano-Fe 3 o 4 / Nylon 66 composite microspheres, the diameter of the obtained microspheres is 5-10 μm.

Embodiment 3

[0037] After weighing polystyrene, nylon 6 and carbon black with a particle size of 23nm in a weight ratio of 80 / 20 / 5, first add polystyrene and carbon black to a Haake rheometer for blending, and the blending temperature is 240°C , the rotation speed was 100 rpm, and the time was 5 minutes, and then nylon 6 was added to the Haake rheometer and blended for 5 minutes under the same conditions. Heat the obtained blend at 240°C for 10 minutes, put it into toluene and dissolve it for 2 hours, then use an acid-resistant funnel to filter it under reduced pressure, wash and purify, and separate carbon black / nylon 6 composite microspheres, the diameter of which is 5 μm about.

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Abstract

The invention provides a method for preparing composite microspheres with the particle diameter of 0.01-100Mum and adjustable particle size distribution. The method is characterized in that one or more kinds of superfine particles is added to two or more kinds of polymer (or performed polymer) with fluxible processability to form composite microspheres by reaction mixing and oriented dispersion technique of superfine particles. The composite micropheres have the advantages of even dispersion of superfine particles and large embedding amount. The preparation method has the advantages of continuous preparation and low cost, and has wide application prospect in fields such as biological medical treatment, electronic message, daily life, etc.

Description

Technical field: [0001] The invention relates to a method for preparing polymer-based composite microspheres, in particular to a new technology for preparing organic-inorganic composite microspheres by directional aggregation. Background technique: [0002] In recent years, the preparation of organic-inorganic composite microspheres has attracted more and more attention. This is because organic-inorganic composite microspheres have the advantages of both organic materials and inorganic materials. Compatibility, but also has the properties of rigidity, magnetism and conductivity of inorganic substances. The preparation methods of organic-inorganic composite microspheres reported in the literature mainly include the droplet internal nucleation method, including suspension polymerization and miniemulsion polymerization (CN02121489.1; CN1556123): the nanoparticles are dispersed in the monomer to prepare W After the / O emulsion, monomer polymerization is carried out, so that the...

Claims

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Application Information

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IPC IPC(8): B01J13/18B01J13/04
Inventor 吴国章蔡小霞
Owner EAST CHINA UNIV OF SCI & TECH
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